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

MagLab Audio Dictionary: Megawatt  

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

Megawatt? Now Playing: What's a Megawatt? Enable Javascript and Flash to stream the Magnet Minute Bryon Dalton Associated Links How We Keep the World's Most Powerful Magnets in...

2

Reconstruction of the Electron Density of Molecules with Single-Axis Alignment  

SciTech Connect (OSTI)

Diffraction from the individual molecules of a molecular beam, aligned parallel to a single axis by a strong electric field or other means, has been proposed as a means of structure determination of individual molecules. As in fiber diffraction, all the information extractable is contained in a diffraction pattern from incidence of the diffracting beam normal to the molecular alignment axis. We present two methods of structure solution for this case. One is based on the iterative projection algorithms for phase retrieval applied to the coefficients of the cylindrical harmonic expansion of the molecular electron density. Another is the holographic approach utilizing presence of the strongly scattering reference atom for a specific molecule.

Starodub, Dmitri

2011-08-12T23:59:59.000Z

3

megatons to megawatts | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Working at NNSA Blog Home megatons to megawatts megatons to megawatts Under U.S.-Russia Partnership, Final Shipment of Fuel Converted From 20,000 Russian Nuclear Warheads...

4

MagLab - MagLab Dictionary: Megawatt (Transcript)  

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

Megawatt As explained by Bryon Dalton, Magnet Operations director. Substation This substation furnishes the MagLab with its 56 megawatts of electricity. Our magnets here at the...

5

Megawatt Energy Systems | Open Energy Information  

Open Energy Info (EERE)

Megawatt Energy Systems Megawatt Energy Systems Jump to: navigation, search Name Megawatt Energy Systems Place Zionsville, Indiana Sector Renewable Energy, Services, Solar, Wind energy Phone number 317.797.3381 Website http://www.mwenergysystems.com Coordinates 39.9508733°, -86.261937° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.9508733,"lon":-86.261937,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

6

SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine  

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

10-Megawatt Supercritical Carbon 10-Megawatt Supercritical Carbon Dioxide Turbine to someone by E-mail Share SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Facebook Tweet about SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Twitter Bookmark SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Google Bookmark SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Delicious Rank SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Digg Find More places to share SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative

7

A Configurable Single-Axis, Multi-Parameter Lens Camera Morgan McGuire John F. Hughes Wojciech Matusik Hanspeter Pfister Frdo Durand Shree Nayar  

E-Print Network [OSTI]

for the increased light. One of the f /1.4 sensors is focussed on the background and one on the actor. An optimizer. This allows multiple video sensors to share an optical center. At each sensor, we vary the imaging parameters a small number of single-axis sensors for a specific application. We believe SAMPL is the first to support

Durand, Frédo

8

Spallation Neutron Source reaches megawatt power  

ScienceCinema (OSTI)

The Department of Energy's Spallation Neutron Source (SNS), already the world's most powerful facility for pulsed neutron scattering science, is now the first pulsed spallation neutron source to break the one-megawatt barrier. "Advances in the materials sciences are fundamental to the development of clean and sustainable energy technologies. In reaching this milestone of operating power, the Spallation Neutron Source is providing scientists with an unmatched resource for unlocking the secrets of materials at the molecular level," said Dr. William F. Brinkman, Director of DOE's Office of Science.

Dr. William F. Brinkman

2010-01-08T23:59:59.000Z

9

A TEN MEGAWATT BOILING HETEROGENEOUS PACKAGE POWER REACTOR. Reactor...  

Office of Scientific and Technical Information (OSTI)

A TEN MEGAWATT BOILING HETEROGENEOUS PACKAGE POWER REACTOR. Reactor Design and Feasibility Problem Re-direct Destination: Temp Data Fields Rosen, M. A.; Coburn, D. B.; Flynn, T....

10

Final Environmental Impact Report: North Brawley Ten Megawatt Geothermal  

Open Energy Info (EERE)

Final Environmental Impact Report: North Brawley Ten Megawatt Geothermal Final Environmental Impact Report: North Brawley Ten Megawatt Geothermal Demonstration Facility Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Final Environmental Impact Report: North Brawley Ten Megawatt Geothermal Demonstration Facility Abstract N/A Author County of Imperial Planning Department Published WESTEC SERVICES, INC., 1979 Report Number N/A DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Final Environmental Impact Report: North Brawley Ten Megawatt Geothermal Demonstration Facility Citation County of Imperial Planning Department. 1979. Final Environmental Impact Report: North Brawley Ten Megawatt Geothermal Demonstration Facility. (!) : WESTEC SERVICES, INC.. Report No.: N/A. Retrieved from

11

Multi-Megawatt Power System Trade Study  

SciTech Connect (OSTI)

A concept study was undertaken to evaluate potential multi-megawatt power sources for nuclear electric propulsion. The nominal electric power requirement was set at 15 MWe with an assumed mission profile of 120 days at full power, 60 days in hot standby, and another 120 days of full power, repeated several times for 7 years of service. Two configurations examined were (1) a gas-cooled reactor based on the NERVA Derivative design, operating a closed cycle Brayton power conversion system; and (2) a molten metal-cooled reactor based on SP-100 technology, driving a boiling potassium Rankine power conversion system. This study considered the relative merits of these two systems, seeking to optimize the specific mass. Conclusions were that either concept appeared capable of approaching the specific mass goal of 3-5 kg/kWe estimated to be needed for this class of mission, though neither could be realized without substantial development in reactor fuels technology, thermal radiator mass efficiency, and power conversion and distribution electronics systems capable of operating at high temperatures. The gas-Brayton systems showed an apparent specific mass advantage (3.53 vs 6.43 kg/kWe for the baseline cases) under the set of assumptions used, but reconciling differences in conservatism in the design algorithms used would make results much more comparable. Brayton systems eliminate the need to deal with two-phase working fluid flows in the microgravity environment of space.

Longhurst, Glen Reed; Schnitzler, Bruce Gordon; Parks, Benjamin Travis

2002-02-01T23:59:59.000Z

12

Mass Megawatts Wind Power Inc | Open Energy Information  

Open Energy Info (EERE)

Megawatts Wind Power Inc Megawatts Wind Power Inc Jump to: navigation, search Name Mass Megawatts Wind Power Inc Address 95 Prescott Street Place Worcester, Massachusetts Zip 01605 Sector Wind energy Product Development of low-cost, wind energy production systems Website http://www.massmegawatts.com/ Coordinates 42.2776492°, -71.7996281° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.2776492,"lon":-71.7996281,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

13

approximately 200 megawatts (MWs) of power from TCEP, making  

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

approximately 200 megawatts (MWs) of power from TCEP, making approximately 200 megawatts (MWs) of power from TCEP, making it the first U.S. purchase by a utility of low-carbon power from a commercial-scale, coal-based power plant with carbon capture. The 400-MW TCEP plant is a first-of-its-kind integrated gasification combined cycle (IGCC) poly-generation facility capable of capturing 90 percent of the carbon dioxide (CO 2 ) it produces. The $2.4-billion plant was a third round selection under DOE's Clean Coal Power Initiative

14

Behavior patterns of axis deer (Axis axis) in Texas  

E-Print Network [OSTI]

BEHAVIOR PATTERNS OF AXIS DEER (AXIS AXIS) IN TEXAS A Thesis by Eugene Robert Fuchs Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree MASTER OF SCIENCE August 1976 Major... Subject: Wildlife and Fisheries Sciences BEHAVIOR PATTERNS OF AXIS DEER (AXIS AXIS) IN TEXAS A Thesis by Eugene Robert Fuchs Approved as to style and content by: (Chairman of Comm ttee) Head of Department) Member ) ( ember August 1976 ABSTRACT...

Fuchs, Eugene Robert

2012-06-07T23:59:59.000Z

15

Project Profile: 10-Megawatt Supercritical Carbon Dioxide Turbine  

Broader source: Energy.gov [DOE]

The National Renewable Energy Laboratory (NREL) and its partners, under the 2012 SunShot Concentrating Solar Power (CSP) R&D funding opportunity announcement (FOA), aim to demonstrate a multi-megawatt power cycle using supercritical carbon dioxide (s-CO2) as the working fluid. The use of carbon dioxide instead of steam allows higher power-cycle efficiency and cycle components that are more compact.

16

DOE to Debut a Dynamic 5-Megawatt Dynamometer  

Broader source: Energy.gov [DOE]

Boulder, Colorado -- As wind turbine capacity continues to grow, so does the need to test the electrical and mechanical power-producing components of those turbines. Currently, only a few test facilities worldwide have the capability to test wind turbine drivetrains with capacity ratings up to 5 megawatts--and DOE's National Wind Technology Center at the National Renewable Energy Laboratory is now one of them.

17

The 5-megawatt power plant with 126 metre rotor diameter  

E-Print Network [OSTI]

The 5-megawatt power plant with 126 metre rotor diameter #12;Design data Rated power 5,000kW Cut-in speed 3.5m/s Rated wind speed 13.0m/s Cut-out speed 25.0m/s onshore 30.0m/s offshore Wind zone up to DIBt 3 Type class up to IEC Ib / GL offshore type class I Rotor Diameter 126.0m Rotor area 12,469m2

Firestone, Jeremy

18

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with a starting and braking control system. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotary axis by keeping the blade span-wise direction in parallel with the axis and being provided with a low speed control windmill in which the radial position of each operating piece varies with a centrifugal force produced by the rotation of the vertical rotary axis.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

19

National Wind Technology Center Dynamic 5-Megawatt Dynamometer  

ScienceCinema (OSTI)

The National Wind Technology Center (NWTC) offers wind industry engineers a unique opportunity to conduct a wide range of tests. Its custom-designed dynamometers can test wind turbine systems from 1 kilowatt (kW) to 5 megawatts (MW). The NWTC's new dynamometer facility simulates operating field conditions to assess the reliability and performance of wind turbine prototypes and commercial machines, thereby reducing deployment time, failures, and maintenance or replacement costs. Funded by the U.S. Department of Energy with American Recovery and Reinvestment Act (ARRA) funds, the 5-MW dynamometer will provide the ability to test wind turbine drivetrains and connect those drivetrains directly to the electricity grid or through a controllable grid interface (CGI). The CGI tests the low-voltage ride-through capability of a drivetrain as well as its response to faults and other abnormal grid conditions.

Felker, Fort

2014-06-10T23:59:59.000Z

20

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with rotational speed control systems. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotating shaft by keeping the blade span-wise direction in parallel with the shaft and being provided with aerodynamic control elements operating manually or automatically to control the rotational speed of the turbine.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

DOE to Develop Multi-Megawatt Offshore Wind Turbine with General Electric |  

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

to Develop Multi-Megawatt Offshore Wind Turbine with General to Develop Multi-Megawatt Offshore Wind Turbine with General Electric DOE to Develop Multi-Megawatt Offshore Wind Turbine with General Electric March 9, 2006 - 11:44am Addthis Contract Valued at $27 million, supports President Bush's Advanced Energy Initiative WASHINGTON, D.C. - The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) in Golden, Colorado, has signed a $27 million, multi-year contract with the General Electric Company (GE) to develop a new offshore wind power system over the next several years. Approximately $8 million of the offshore wind project will be cost-shared by DOE. "Offshore wind technology, another aspect of President Bush's Advanced Energy Initiative, can reduce our dependence on foreign energy sources as

22

Berkeley Lab Facilitates 18.6-megawatt PV facility at Army's Fort  

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

Berkeley Lab Facilitates 18.6-megawatt PV facility at Army's Fort Berkeley Lab Facilitates 18.6-megawatt PV facility at Army's Fort Detrick, Maryland December 2013 The Army, on Friday November 29, announced a notice of intent to award a contract to build an 18.6-megawatt solar photovoltaic (PV) facility at Fort Detrick, in Frederick, Maryland. This action will help the service meet its goal of deploying one gigawatt of renewable energy by 2025. The selected contractor is Framingham, Mass.-based Ameresco. Lawrence Berkeley National Laboratory (Berkeley Lab), through its Environmental Energy Technologies Division, provided essential technical services, over a span of two years, to make this project happen. Supported by the Federal Energy Management Program, Berkeley Lab renewable power expert Gerald Robinson provided the Army, Fort Detrick staff, its Energy

23

Food habits of axis deer (Axis axis) on the Coastal Plain, Calhoun County, Texas  

E-Print Network [OSTI]

FOOD HABITS OF AXIS DEER (Axis axis) ON THE COASTAL PLAIN, CALHOUN COUNTY, TEXAS A Thesis by JOHN CLARENCE SMITH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 197l Major Subject: Wildlife Science FOOD HABITS OF AXIS DEER (Axi. s axis) ON THE COASTAL PLAIN, CALHOUN COUNTY, TEXAS A Thesis by JOHN CLARENCE SMITH Approved as to style and content by: (Chairman of Committee) ! (Head...

Smith, John Clarence

2012-06-07T23:59:59.000Z

24

MERCURY PURIFICATION IN THE MEGAWATT LIQUID METAL SPALLATION TARGET OF EURISOL-DS Joerg Neuhausena  

E-Print Network [OSTI]

MERCURY PURIFICATION IN THE MEGAWATT LIQUID METAL SPALLATION TARGET OF EURISOL-DS Joerg Neuhausena. For the development of a purification procedure, knowledge about the chemical state of the different elements present-components are of different origin: Gaseous impurities include oxygen, nitrogen and water. The construction materials

McDonald, Kirk

25

MARS15 study of the Energy Production Demonstrator Model for Megawatt  

E-Print Network [OSTI]

MARS15 study of the Energy Production Demonstrator Model for Megawatt proton beams in the 0.5 ­ 120 Targetry Workshop HPT5, Fermilab #12;Energy Production Demonstrator MARS15 Model · Solid targets · R= 60 cm · Energy Production/Materials Testing · LAQGSM/CEM generators were usedU-nat, 3 GeV, Energy deposition, Ge

McDonald, Kirk

26

Vertical axis wind turbines  

DOE Patents [OSTI]

A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.

Krivcov, Vladimir (Miass, RU); Krivospitski, Vladimir (Miass, RU); Maksimov, Vasili (Miass, RU); Halstead, Richard (Rohnert Park, CA); Grahov, Jurij (Miass, RU)

2011-03-08T23:59:59.000Z

27

Operational Performance of the Two-Channel 10 Megawatt Feedback Amplifier System for MHD Control on the Columbia University HBT-EP Tokamak  

SciTech Connect (OSTI)

The operational characteristics and performance of the two channel 10 Megawatt MHD feedback control system as installed by Los Alamos National Laboratory on the Columbia University HBT-EP tokamak are described. In the present configuration, driving independent 300 {micro}H saddle coil sets, each channel can deliver 1100 Amperes and 16 kV peak to peak. Full power bandwidth is about 12 kHz, with capabilities at reduced power to 30 kHz. The present system topology is designed to suppress magnetohydrodynamic activity with m=2, n=1 symmetry. Application of either static (single phase) or rotating (twin phased) magnetic perturbations shows the ability to spin up or slow down the plasma, and also prevent (or cause) so-called ''mode-locking''. Open loop and active feedback experiments using a digital signal processor (DSP) have been performed on the HBT-EP tokamak and initial results show the ability to manipulate the plasma MHD mode frequency.

Reass, W.A.; Wurden, G.A.

1997-10-06T23:59:59.000Z

28

Vertical axis wind turbine acoustics  

E-Print Network [OSTI]

Vertical Axis Wind Turbine Acoustics Charlie Pearson Corpus Christi College Cambridge University Engineering Department A thesis submitted for the degree of Doctor of Philosophy September 2013 Declaration Described in this dissertation is work... quickly to changing wind conditions, small- scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where the wind is more gusty in nature. If VAWTs are erected in built up areas...

Pearson, Charlie

2014-04-08T23:59:59.000Z

29

Project X - a new multi-megawatt proton source at Fermilab  

E-Print Network [OSTI]

Project X is a multi-megawatt proton facility being developed to support intensity frontier research in elementary particle physics, with possible applications to nuclear physics and nuclear energy research, at Fermilab. The centerpiece of this program is a superconducting H- linac that will support world leading programs in long baseline neutrino experimentation and the study of rare processes. Based on technology shared with the International Linear Collider (ILC), Project X will provide multi-MW beams at 60-120 GeV from the Main Injector, simultaneous with very high intensity beams at lower energies. Project X will also support development of a Muon Collider as a future facility at the energy frontier.

Nagaitsev, S

2012-01-01T23:59:59.000Z

30

Two-axis angular effector  

DOE Patents [OSTI]

A new class of coplanar two-axis angular effectors. These effectors combine a two-axis rotational joint analogous to a Cardan joint with linear actuators in a manner to produce a wider range of rotational motion about both axes defined by the joint. This new class of effectors also allows design of robotic manipulators having very high strength and efficiency. These effectors are particularly suited for remote operation in unknown surroundings, because of their extraordinary versatility. An immediate application is to the problems which arise in nuclear waste remediation.

Vaughn, Mark R. (Albuquerque, NM); Robinett, III, Rush D. (Tijeras, NM); Phelan, John R. (Albuquerque, NM); Van Zuiden, Don M. (Albuquerque, NM)

1997-01-21T23:59:59.000Z

31

Comparative Assessment of Direct Drive High Temperature Superconducting Generators in Multi-Megawatt Class Wind Turbines  

SciTech Connect (OSTI)

This paper summarizes the work completed under the CRADA between NREL and American Superconductor (AMSC). The CRADA combined NREL and AMSC resources to benchmark high temperature superconducting direct drive (HTSDD) generator technology by integrating the technologies into a conceptual wind turbine design, and comparing the design to geared drive and permanent magnet direct drive (PMDD) wind turbine configurations. Analysis was accomplished by upgrading the NREL Wind Turbine Design Cost and Scaling Model to represent geared and PMDD turbines at machine ratings up to 10 MW and then comparing cost and mass figures of AMSC's HTSDD wind turbine designs to theoretical geared and PMDD turbine designs at 3.1, 6, and 10 MW sizes. Based on the cost and performance data supplied by AMSC, HTSDD technology has good potential to compete successfully as an alternative technology to PMDD and geared technology turbines in the multi megawatt classes. In addition, data suggests the economics of HTSDD turbines improve with increasing size, although several uncertainties remain for all machines in the 6 to 10 MW class.

Maples, B.; Hand, M.; Musial, W.

2010-10-01T23:59:59.000Z

32

A Megawatt-level 28z GHz Heating System For The National Spherical Torus Experiment Upgrade  

SciTech Connect (OSTI)

The National Spherical Torus Experiment Upgrade (NSTX-U) will operate at axial toroidal fields of < 1 T and plasma currents, Ip < 2 MA. The development of non-inductive (NI) plasmas is a major long-term research goal for NSTX-U. Time dependent numerical simulations of 28 GHz electron cyclotron (EC) heating of low density NI start-up plasmas generated by Coaxial Helicity Injection (CHI) in NSTX-U predict a significant and rapid increase of the central electron temperature (Te(0)) before the plasma becomes overdense. The increased Te(0) will significantly reduce the Ip decay rate of CHI plasmas, allowing the coupling of fast wave heating and neutral beam injection. A megawatt-level, 28 GHz electron heating system is planned for heating NI start-up plasmas in NSTX-U. In addition to EC heating of CHI start-up discharges, this system will be used for electron Bernstein wave (EBW) plasma start-up, and eventually for EBW heating and current drive during the Ip flattop.

Taylor, Gary [PPPL

2014-04-01T23:59:59.000Z

33

AXI LLC | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » AXI LLC Jump to: navigation, search Name AXI LLC Place Quincy, Massachusetts Zip 02169 Sector Biofuels Product Aims to make commercially feasible strains of algae for fuel production Coordinates 42.2363996°, -71.0200613° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.2363996,"lon":-71.0200613,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

34

Dual Axis Radiographic Hydrodynamic Test Facility | National...  

National Nuclear Security Administration (NNSA)

Dual Axis Radiographic Hydrodynamic Test Facility | National Nuclear Security Administration People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear...

35

Flexible helical-axis stellarator  

DOE Patents [OSTI]

An 1=1 helical winding which spirals about a conventional planar, circular central conductor of a helical-axis stellarator adds a significant degree of flexibility by making it possible to control the rotational transform profile and shear of the magnetic fields confining the plasma in a helical-axis stellarator. The toroidal central conductor links a plurality of toroidal field coils which are separately disposed to follow a helical path around the central conductor in phase with the helical path of the 1=1 winding. This coil configuration produces bean-shaped magnetic flux surfaces which rotate around the central circular conductor in the same manner as the toroidal field generating coils. The additional 1=1 winding provides flexible control of the magnetic field generated by the central conductor to prevent the formation of low-order resonances in the rotational transform profile which can produce break-up of the equilibrium magnetic surfaces. Further, this additional winding can deepen the magnetic well which together with the flexible control provides increased stability.

Harris, Jeffrey H. (Oak Ridge, TN); Hender, Timothy C. (Abingdon, GB2); Carreras, Benjamin A. (Oak Ridge, TN); Cantrell, Jack L. (Oak Ridge, TN); Morris, Robert N. (Oak Ridge, TN)

1988-01-01T23:59:59.000Z

36

Modeling of multiple-optical-axis pattern-integrated interference lithography systems.  

E-Print Network [OSTI]

??The image quality and collimation in a multiple-optical-axis pattern-integrated interference lithography system are evaluated for an elementary optical system composed of single-element lenses. Image quality (more)

Sedivy, Donald E.

2014-01-01T23:59:59.000Z

37

Arc discharge regulation of a megawatt hot cathode bucket ion source for the experimental advanced superconducting tokamak neutral beam injector  

SciTech Connect (OSTI)

Arc discharge of a hot cathode bucket ion source tends to be unstable what attributes to the filament self-heating and energetic electrons backstreaming from the accelerator. A regulation method, which based on the ion density measurement by a Langmuir probe, is employed for stable arc discharge operation and long pulse ion beam generation. Long pulse arc discharge of 100 s is obtained based on this regulation method of arc power. It establishes a foundation for the long pulse arc discharge of a megawatt ion source, which will be utilized a high power neutral beam injection device.

Xie Yahong; Hu Chundong; Liu Sheng; Jiang Caichao; Li Jun; Liang Lizhen [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China); Collaboration: NBI Team

2012-01-15T23:59:59.000Z

38

Helical axis stellarator with noninterlocking planar coils  

DOE Patents [OSTI]

A helical axis stellarator using only noninterlocking planar, non-circular coils, generates magnetic fields having a magnetic well and large rotational transform with resultant large equilibrium beta.

Reiman, Allan (Princeton, NJ); Boozer, Allen H. (Rocky Hill, NJ)

1987-01-01T23:59:59.000Z

39

Dual Axis Radiographic Hydrodynamic Test Facility  

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

DARHT Facility: A critical component of stockpile stewardship DARHT Facility: A critical component of stockpile stewardship A new research frontier awaits! Our door is open and we thrive on mutually beneficial partnerships, collaborations that drive innovations and new technologies. April 12, 2012 Dominic Tafoya and Dave Honaberger prepare a refurbished DARHT (Dual Axis Radiographic Hydrotest Facility) 2nd axis accelerator cell for magnetic axis alignment measurements. Contact Group Leader Terry Priestley (505) 665-1330 Email Deputy Group Leader Tim Ferris (505) 665-2179 Email Hydrotests are critical in assessing nuclear weapons in nation's stockpile Dual Axis Radiographic Hydrodynamic Test facility 4:17 How DARHT Works The weapons programs at Los Alamos have one principal mission: ensure the safety, security, and effectiveness of nuclear weapons in our nation's

40

Vertical Axis Wind Turbine Foundation parameter study  

SciTech Connect (OSTI)

The dynamic failure criterion governing the dimensions of prototype Vertical Axis Wind Turbine Foundations is treated as a variable parameter. The resulting change in foundation dimensions and costs is examined.

Lodde, P.F.

1980-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Automatic 5-axis NC toolpath generation  

E-Print Network [OSTI]

Despite over a decade of research, automatic toolpath generation has remained an elusive goal for 5-axis NC machining. This thesis describes the theoretical and practical issues associated with generating collision free ...

Balasubramaniam, Mahadevan, 1976-

2001-01-01T23:59:59.000Z

42

A conceptual study of floating axis water current turbine for low-cost energy capturing from river, tide and ocean currents  

Science Journals Connector (OSTI)

The cost of utilizing kinetic energy of river stream, tidal and ocean current is considered to be higher than that of wind power generation because of difficulties in construction and maintenance of devices installed in seawater. As a solution to the problem, the authors propose a new concept of water stream turbine. The main idea is in the manner of supporting turbine. Although it is similar to a vertical axis turbine, the direction of turbine axis is not firmly fixed and its tilt angle is passively adjustable to the stream velocity. Since it does not have to keep the turbine axis in upright position, required structural strength and weight of the device will be reduced significantly. This paper describes the application ranging from the small hydro power in river streams to large application of tidal and ocean current turbine. In the large capacity plant for tidal stream and ocean current, the main mechanism of turbine axis support is the same as that of the wind turbine authors proposed in the previous paper. It leads to the further opportunity of cost reduction. The sample design of a multi-megawatt ocean current turbine shows the possibility of high economic performance of the concept. The results show that the cost of energy in the concept can be comparable to a land based wind turbine.

Hiromichi Akimoto; Kenji Tanaka; Kiyoshi Uzawa

2013-01-01T23:59:59.000Z

43

Sandia National Laboratories: Innovative Offshore Vertical-Axis...  

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

WindInnovative Offshore Vertical-Axis Wind Turbine Rotors Innovative Offshore Vertical-Axis Wind Turbine Rotors This project seeks to advance large offshore vertical-axis wind...

44

T-613: Microsoft Excel Axis Properties Remote Code Execution...  

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

3: Microsoft Excel Axis Properties Remote Code Execution Vulnerability T-613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability May 2, 2011 - 7:42am Addthis...

45

Solasta aka The Eagle Axis | Open Energy Information  

Open Energy Info (EERE)

Eagle Axis Jump to: navigation, search Name: Solasta (aka The Eagle Axis) Place: Newton, Massachusetts Zip: 2458 Sector: Efficiency, Solar Product: Start-up planning to produce...

46

Axis Technologies Group Inc | Open Energy Information  

Open Energy Info (EERE)

Axis Technologies Group Inc Axis Technologies Group Inc Jump to: navigation, search Name Axis Technologies Group, Inc Place Lincoln, Nebraska Zip 68522 Product Designs, manufactures, and markets energy-saving and daylight harvesting electronic dimming ballasts for the commercial lighting industry. Coordinates 47.829403°, -118.419202° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":47.829403,"lon":-118.419202,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

47

Enclosed, off-axis solar concentrator  

DOE Patents [OSTI]

A solar concentrator including a housing having receiving wall, a reflecting wall and at least two end walls, the receiving, reflecting and end walls defining a three-dimensional volume having an inlet, wherein a vertical axis of the housing is generally perpendicular to the inlet, a receiver mounted on the receiving wall of the housing, the receiver including at least one photovoltaic cell, wherein a vertical axis of the receiver is disposed at a non-zero angle relative to the vertical axis of the housing, at least one clip disposed on the reflecting wall an optical element received within the three-dimensional volume, the optical element including at least one tab, the tab being engaged by the clip to align the optical element with the receiver, and a window received over the inlet to enclose the housing.

Benitez, Pablo; Grip, Robert E; Minano, Juan C; Narayanan, Authi A; Plesniak, Adam; Schwartz, Joel A

2013-11-26T23:59:59.000Z

48

Table 11.6 Installed Nameplate Capacity of Fossil-Fuel Steam-Electric Generators With Environmental Equipment, 1985-2010 (Megawatts)  

U.S. Energy Information Administration (EIA) Indexed Site

Installed Nameplate Capacity of Fossil-Fuel Steam-Electric Generators With Environmental Equipment," Installed Nameplate Capacity of Fossil-Fuel Steam-Electric Generators With Environmental Equipment," " 1985-2010 (Megawatts)" "Year","Coal",,,,"Petroleum and Natural Gas",,,,"Total 1" ,,,"Flue Gas","Total 2",,,"Flue Gas","Total 2",,,"Flue Gas","Total 2" ,"Particulate","Cooling","Desulfurization",,"Particulate","Cooling","Desulfurization",,"Particulate","Cooling","Desulfurization" ,"Collectors","Towers","(Scrubbers)",,"Collectors","Towers","(Scrubbers)",,"Collectors","Towers","(Scrubbers)"

49

A low order model for vertical axis wind turbines  

E-Print Network [OSTI]

A new computational model for initial sizing and performance prediction of vertical axis wind turbines

Drela, Mark

50

High payload six-axis load sensor  

DOE Patents [OSTI]

A repairable high-payload six-axis load sensor includes a table, a base, and at least three shear-pin load transducers removably mounted between the table and the base. Removable mounting permits easy replacement of damaged shear pins. Preferably, the shear-pin load transducers are responsive to shear forces imparted along the two axes perpendicular to an axis of minimum sensitivity characteristic of the transducer. Responsive to an applied shear force, each shear-pin load transducer can produce an electrical signal proportional to the reaction force. The load sensor can further include a structure for receiving the proportional electrical signals and computing the applied load corresponding to the proportional electrical signals. The computed load can be expressed in terms of a three-dimensional XYZ Cartesian coordinate system.

Jansen, John F. (Knoxville, TN); Lind, Randall F. (Knoxville, TN)

2003-01-01T23:59:59.000Z

51

Space variations in axis height of the jet stream core  

E-Print Network [OSTI]

height of the jet axis relative to the height of the jet maximum for slow vs. fast cases. 13 Mean height of the jet axis relative to the height at the trough. 13 Mean height of the jet axis relative to the height at the ridge. 15 Mean height... of the jet axis relative to the height at the jet maximum, when the maximum is near a trough. 15 Mean height of the jet axis relative to the height at the minimum, when the minimum is near a ridge. 17 Mean height of the jet axis relative to the height...

Leutwyler, Cooke Hearon

1965-01-01T23:59:59.000Z

52

Atomic resolution electrostatic potential mapping of graphene sheets by off-axis electron holography  

SciTech Connect (OSTI)

Off-axis electron holography has been performed at atomic resolution with the microscope operated at 80?kV to provide electrostatic potential maps from single, double, and triple layer graphene. These electron holograms have been reconstructed in order to obtain information about atomically resolved and mean inner potentials. We propose that off-axis electron holography can now be used to measure the electrical properties in a range of two-dimensional semiconductor materials and three dimensional devices comprising stacked layers of films to provide important information about their electrical properties.

Cooper, David, E-mail: david.cooper@cea.fr [University Grenoble Alpes, F-38000 Grenoble (France); CEA, LETI, MINATEC Campus, F-38054, Grenoble (France); Pan, Cheng-Ta; Haigh, Sarah [School of Materials, The University of Manchester, Manchester M13 9PL (United Kingdom)

2014-06-21T23:59:59.000Z

53

Multi-axis Capability for Powered Ankle-Foot Prostheses  

Science Journals Connector (OSTI)

In this chapter, the concept of a multi-axis powered ankle-foot prosthesis is introduced. The feasibility of this ... proposed cable-driven mechanism for the multi-axis powered ankle-foot prosthesis is capable of...

Evandro M. Ficanha; Mohammad Rastgaar; Kenton R. Kaufman

2014-01-01T23:59:59.000Z

54

Vertical axis wind turbine with continuous blade angle adjustment  

E-Print Network [OSTI]

The author presents a concept for a vertical axis wind turbine that utilizes each blade's entire rotational cycle for power generation. Each blade has its own vertical axis of rotation and is constrained to rotate at the ...

Weiss, Samuel Bruce

2010-01-01T23:59:59.000Z

55

AXIS: An instrument for imaging Compton radiographs using the Advanced Radiography Capability on the NIF  

SciTech Connect (OSTI)

Compton radiography is an important diagnostic for Inertial Confinement Fusion (ICF), as it provides a means to measure the density and asymmetries of the DT fuel in an ICF capsule near the time of peak compression. The AXIS instrument (ARC (Advanced Radiography Capability) X-ray Imaging System) is a gated detector in development for the National Ignition Facility (NIF), and will initially be capable of recording two Compton radiographs during a single NIF shot. The principal reason for the development of AXIS is the requirement for significantly improved detection quantum efficiency (DQE) at high x-ray energies. AXIS will be the detector for Compton radiography driven by the ARC laser, which will be used to produce Bremsstrahlung X-ray backlighter sources over the range of 50 keV200 keV for this purpose. It is expected that AXIS will be capable of recording these high-energy x-rays with a DQE several times greater than other X-ray cameras at NIF, as well as providing a much larger field of view of the imploded capsule. AXIS will therefore provide an image with larger signal-to-noise that will allow the density and distribution of the compressed DT fuel to be measured with significantly greater accuracy as ICF experiments are tuned for ignition.

Hall, G. N., E-mail: hall98@llnl.gov; Izumi, N.; Tommasini, R.; Carpenter, A. C.; Palmer, N. E.; Zacharias, R.; Felker, B.; Holder, J. P.; Allen, F. V.; Bell, P. M.; Bradley, D.; Montesanti, R.; Landen, O. L. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States)

2014-11-15T23:59:59.000Z

56

Multi-Megawatt Organic Rankine Engine power plant (MORE). Phase IA final report: system design of MORE power plant for industrial energy conservation emphasizing the cement industry  

SciTech Connect (OSTI)

The Multi-Megawatt Organic Rankine Engine (MORE) program is directed towards the development of a large, organic Rankine power plant for energy conservation from moderate temperature industrial heat streams. Organic Rankine power plants are ideally suited for use with heat sources in the temperature range below 1100/sup 0/F. Cement manufacture was selected as the prototype industry for the MORE system because of the range of parameters which can be tested in a cement application. This includes process exit temperatures of 650/sup 0/F to 1110/sup 0/F for suspension preheater and long dry kilns, severe dust loading, multi-megawatt power generation potential, and boiler exhaust gas acid dew point variations. The work performed during the Phase IA System Design contract period is described. The System Design task defines the complete MORE system and its installation to the level necessary to obtain detailed performance maps, equipment specifications, planning of supporting experiments, and credible construction and hardware cost estimates. The MORE power plant design is based upon installation in the Black Mountain Quarry Cement Plant near Victorville, California.

Bair, E.K.; Breindel, B.; Collamore, F.N.; Hodgson, J.N.; Olson, G.K.

1980-01-31T23:59:59.000Z

57

Two-axis tracking solar collector mechanism  

DOE Patents [OSTI]

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion.

Johnson, Kenneth C. (201 W. California Ave. #705, Sunnyvale, CA 94086)

1992-01-01T23:59:59.000Z

58

Vertical axis wind turbine control strategy  

SciTech Connect (OSTI)

Early expensive in automatic operation of the Sandia 17-m vertical axis research wind turbine (VAWT) has demonstrated the need for a systematic study of control algorithms. To this end, a computer model has been developed that uses actual wind time series and turbine performance data to calculate the power produced by the Sandia 17-m VAWT operating in automatic control. The model has been used to investigate the influence of starting algorithms on annual energy production. The results indicate that, depending on turbine and local wind characteristics, a bad choice of a control algorithm can significantly reduce overall energy production. The model can be used to select control algorithms and threshold parameters that maximize long-term energy production. An attempt has been made to generalize these results from local site and turbine characteristics to obtain general guidelines for control algorithm design.

McNerney, G.M.

1981-08-01T23:59:59.000Z

59

Two-axis tracking solar collector mechanism  

DOE Patents [OSTI]

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion. 16 figs.

Johnson, K.C.

1992-12-08T23:59:59.000Z

60

Two-axis tracking solar collector mechanism  

DOE Patents [OSTI]

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion.

Johnson, Kenneth C. (201 W. California Ave., #401, Sunnyvale, CA 94086)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

A comparison of on-axis and off-axis heliostat alignment strategies  

SciTech Connect (OSTI)

Heliostat installation and alignment costs will be an important element in future solar power tower projects. The predicted annual performances of on- and-off axis strategies are compared for 95 m{sup 2} flat-glass heliostats and an external, molten-salt receiver. Actual approaches to heliostat alignment that have been used in the past are briefly discussed, and relative strengths and limitations are noted. The optimal approach can vary with the application.

Jones, S.A.

1996-03-01T23:59:59.000Z

62

E-Print Network 3.0 - axis factoring method Sample Search Results  

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

Once this is done, we can call the setup method to properly initialize the axis... On: color values start end moveBy scaleFactor minValue maxValue AbstractAxis AxisAxisDecorator...

63

On the probability of major-axis precession in triaxial ellipsoidal potentials  

E-Print Network [OSTI]

Orbits in triaxial ellipsoidal potentials precess about either the major or minor axis of the ellipsoid. In standard perturbation theory it can be shown that a circular orbit will precess about the minor axis if its angular momentum vector lies in a region bounded by two great circles which pass through the intermediate axis and which are inclined with minimum separation $i_T$ from the minor axis. We test the accuracy of the standard formula for $i_T$ by performing orbit integrations to determine $i_S$, the simulated turnover angle corresponding to $i_T$. We reach two principal conclusions: (i) $i_S$ is usually greater than $i_T$, by as much as 12 degrees even for moderate triaxialities, $A/1.2single, well-defined number but can vary by a few degrees depending upon the initial phase of the orbit. This means that there is a reasonable probability for capture of gas onto orbits which precess about both axes. Interactions can then lead to substantial loss of angular momentum and subsequent infall to the galactic centre.

P. A. Thomas; S. Vine; F. R. Pearce

1993-08-09T23:59:59.000Z

64

Event Rates for Off Axis NuMI Experiments  

E-Print Network [OSTI]

Neutrino interaction rates for experiments placed off axis in the NuMI beam are calculated. Primary proton beam energy is 120 GeV and four locations at 810 km from target and 6, 12, 30 and 40 km off axis are considered. This report is part of the Joint FNAL/BNL Future Long Baseline Neutrino Oscillation Experiment Study.

B. Viren

2006-08-25T23:59:59.000Z

65

3-Axis Magnetic Sensor Hybrid The Honeywell HMC2003 is a high sensitivity, three-axis magnetic sensor hybrid  

E-Print Network [OSTI]

3-Axis Magnetic Sensor Hybrid HMC2003 The Honeywell HMC2003 is a high sensitivity, three-axis magnetic sensor hybrid assembly used to measure low magnetic field strengths. Honeywell's most sensitive product excellence and performance by introducing innovative solid-state magnetic sensor solutions

Kleinfeld, David

66

Off-axis silicon carbide substrates  

DOE Patents [OSTI]

A method of epitaxial growth of a material on a crystalline substrate includes selecting a substrate having a crystal plane that includes a plurality of terraces with step risers that join adjacent terraces. Each terrace of the plurality or terraces presents a lattice constant that substantially matches a lattice constant of the material, and each step riser presents a step height and offset that is consistent with portions of the material nucleating on adjacent terraces being in substantial crystalline match at the step riser. The method also includes preparing a substrate by exposing the crystal plane; and epitaxially growing the material on the substrate such that the portions of the material nucleating on adjacent terraces merge into a single crystal lattice without defects at the step risers.

Edgar, James; Dudley, Michael; Kuball, Martin; Zhang, Yi; Wang, Guan; Chen, Hui; Zhang, Yu

2014-09-02T23:59:59.000Z

67

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility  

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

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons. At the Los Alamos National Laboratory (LANL), the Dual-Axis Radiographic Hydrodynamic Test Facility, or DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons.

68

MHK Technologies/Vertical Axis Venturi System | Open Energy Information  

Open Energy Info (EERE)

Axis Venturi System Axis Venturi System < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage 275px Technology Profile Primary Organization Warrior Girl Corporation Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The proprietary venturi system uses two venturies one on the upstream side of the vertical axis turbine to force the water flow into the turbine and one at the downstream side of the turbine which creates a lower pressure region that pulls the water through the turbine The vertical axis orientation of the turbine is believed by the company to allow for efficiency gains

69

Curvature gouge detection and prevention in 5-axis CNC machining.  

E-Print Network [OSTI]

??Five-axis CNC machining presents high efficiency and unparallel flexibility in the machining of complex curved surfaces. However, generation of gouge-free CNC tool path and cutter (more)

Wang, Yin Jack

2010-01-01T23:59:59.000Z

70

A hybrid type small 5-axis CNC milling machine  

E-Print Network [OSTI]

5-axis CNC milling machines are important in a number of industries ranging from aerospace to consumer-die-mold machining because they can deliver high machining accuracy with a spindle tilting capacity. Most of these ...

Son, Seung-Kil, 1964-

2002-01-01T23:59:59.000Z

71

Center of pressure calculations for a bent-axis vehicle  

SciTech Connect (OSTI)

Bent-axis maneuvering vehicles provide a unique type of control for a variety of supersonic and hypersonic missions. Unfortunately, large hinge moments, incomplete pitching moment predictions, and a misunderstanding of corresponding center of pressure calculations have prevented their application. A procedure is presented for the efficient design of bent-axis vehicles given an adequate understanding of origins of pitching moment effects. In particular,sources of pitching moment contributions will be described including not only normal force, but inviscid axial force and viscous effects as well. Off-centerline center of pressure effects are first reviewed for symmetric hypersonic sphere-cone configurations. Next the effects of the bent-axis geometry are considered where axial force, acting on the deflected tail section, can generate significant pitching moment components. The unique relationship between hinge moments and pitching moments for the bent-axis class of vehicles is discussed. 15 refs.

Rutledge, W.H.; Polansky, G.F.

1992-01-01T23:59:59.000Z

72

EIS-0228: Dual Axis Radiographic Hydrodynamic Test (DARHT) Facility  

Broader source: Energy.gov [DOE]

This EIS evaluates the potential environmental impact of a proposal to construct and operate theDual Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory (LANL)...

73

Lessons from Iowa : development of a 270 megawatt compressed air energy storage project in midwest Independent System Operator : a study for the DOE Energy Storage Systems Program.  

SciTech Connect (OSTI)

The Iowa Stored Energy Park was an innovative, 270 Megawatt, $400 million compressed air energy storage (CAES) project proposed for in-service near Des Moines, Iowa, in 2015. After eight years in development the project was terminated because of site geological limitations. However, much was learned in the development process regarding what it takes to do a utility-scale, bulk energy storage facility and coordinate it with regional renewable wind energy resources in an Independent System Operator (ISO) marketplace. Lessons include the costs and long-term economics of a CAES facility compared to conventional natural gas-fired generation alternatives; market, legislative, and contract issues related to enabling energy storage in an ISO market; the importance of due diligence in project management; and community relations and marketing for siting of large energy projects. Although many of the lessons relate to CAES applications in particular, most of the lessons learned are independent of site location or geology, or even the particular energy storage technology involved.

Holst, Kent (Iowa Stored Energy Plant Agency, Traer, IA); Huff, Georgianne; Schulte, Robert H. (Schulte Associates LLC, Northfield, MN); Critelli, Nicholas (Critelli Law Office PC, Des Moines, IA)

2012-01-01T23:59:59.000Z

74

3D Single Particle Tracking Spectroscopy and Nanoparticles for Interrogating Complex Systems  

E-Print Network [OSTI]

2.4 Real-time 3D single-particle trackingnanoparticles using real-time 3D single-particle tracking. ( axis (Ref. [124]). (b) A 3D representation of detected

Montiel, Daniel

2012-01-01T23:59:59.000Z

75

Impacts of Raindrop Fall Velocity and Axis Ratio Errors on Dual-Polarization Radar Rainfall Estimation  

Science Journals Connector (OSTI)

Motivated by the field observations of fall velocity and axis ratio deviations from predicted terminal velocity and equilibrium axis ratio values, the combined effects of raindrop fall velocity and axis ratio deviations on dual-polarization radar ...

Bin Pei; Firat Y. Testik; Mekonnen Gebremichael

2014-10-01T23:59:59.000Z

76

Z-Axis Tipper Electromagnetics | Open Energy Information  

Open Energy Info (EERE)

Z-Axis Tipper Electromagnetics Z-Axis Tipper Electromagnetics Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Z-Axis Tipper Electromagnetics Details Activities (2) Areas (2) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Magnetotelluric Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 4,827.00482,700 centUSD 4.827 kUSD 0.00483 MUSD 4.827e-6 TUSD / mile Median Estimate (USD): 6,206.14620,614 centUSD 6.206 kUSD 0.00621 MUSD 6.20614e-6 TUSD / mile High-End Estimate (USD): 17,239.291,723,929 centUSD 17.239 kUSD 0.0172 MUSD 1.723929e-5 TUSD / mile Dictionary.png

77

T-613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability  

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

613: Microsoft Excel Axis Properties Remote Code Execution 613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability T-613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability May 2, 2011 - 7:42am Addthis PROBLEM: Microsoft Excel is prone to a remote code-execution vulnerability because the applications fail to sufficiently validate user-supplied input. PLATFORM: Microsoft Excel (2002-2010) ABSTRACT: Microsoft Excel is prone to a remote code-execution vulnerability because the applications fails to sufficiently validate user-supplied input. Attackers can exploit this issue by enticing an unsuspecting user to open a specially crafted Excel file. Successful exploits can allow attackers to execute arbitrary code with the privileges of the user running the application. Failed exploit attempts will result in a denial-of-service

78

MHK Technologies/Horizontal Axis Logarithmic Spiral Turbine | Open Energy  

Open Energy Info (EERE)

Horizontal Axis Logarithmic Spiral Turbine Horizontal Axis Logarithmic Spiral Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization Golden Turbines LLC Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description A Horizontal axis Water turbine following the logarithmic spiral to generate clean electric energy from slow moving currents like rivers or ocean currents and with least impact on marine life and the environment because it doesn t require a damn or building huge structures Technology Dimensions Device Testing Date Submitted 36:09.5 << Return to the MHK database homepage

79

Four-axis micro measuring systems performance verification  

Science Journals Connector (OSTI)

Abstract This article describes the performance verification of 3D optical measuring instruments integrating a rotational axis using an artifact. The goal is the performance verification of four-axis measuring systems for the full 3D acquisition of micro-geometric parts. This type of measurement has many potential applications, such as in micro-tool, micro-mold, or micro-device manufacturing. The artifact is as simple as possible to reduce manufacturing costs, ensure easy calibration, comply with the ISO 10360 standard and consider all volumetric error contributions. The artifact may be useful to both measuring system manufacturers and users to provide a measurement traceability path.

Giovanni Moroni; Stefano Petr; Wahyudin P. Syam

2014-01-01T23:59:59.000Z

80

A Simplified Morphing Blade for Horizontal Axis Wind Turbines  

E-Print Network [OSTI]

A Simplified Morphing Blade for Horizontal Axis Wind Turbines Weijun WANG , St´ephane CARO, Fouad salinas@hotmail.com The aim of designing wind turbine blades is to improve the power capture ability by adjusting the twist of the blade's root and tip. To evaluate the performance of wind turbine blades

Recanati, Catherine

Note: This page contains sample records for the topic "megawatt single axis" 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

E-Print Network 3.0 - axis wind turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: axis wind turbines...

82

E-Print Network 3.0 - axis wind turbine Sample Search Results  

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

turbine Search Powered by Explorit Topic List Advanced Search Sample search results for: axis wind turbine...

83

Serotonin, tryptophan metabolism and the brain-gut-microbiome axis  

Science Journals Connector (OSTI)

Abstract The brain-gut axis is a bidirectional communication system between the central nervous system and the gastrointestinal tract. Serotonin functions as a key neurotransmitter at both terminals of this network. Accumulating evidence points to a critical role for the gut microbiome in regulating normal functioning of this axis. In particular, it is becoming clear that the microbial influence on tryptophan metabolism and the serotonergic system may be an important node in such regulation. There is also substantial overlap between behaviours influenced by the gut microbiota and those which rely on intact serotonergic neurotransmission. The developing serotonergic system may be vulnerable to differential microbial colonisation patterns prior to the emergence of a stable adult-like gut microbiota. At the other extreme of life, the decreased diversity and stability of the gut microbiota may dictate serotonin-related health problems in the elderly. The mechanisms underpinning this crosstalk require further elaboration but may be related to the ability of the gut microbiota to control host tryptophan metabolism along the kynurenine pathway, thereby simultaneously reducing the fraction available for serotonin synthesis and increasing the production of neuroactive metabolites. The enzymes of this pathway are immune and stress-responsive, both systems which buttress the brain-gut axis. In addition, there are neural processes in the gastrointestinal tract which can be influenced by local alterations in serotonin concentrations with subsequent relay of signals along the scaffolding of the brain-gut axis to influence CNS neurotransmission. Therapeutic targeting of the gut microbiota might be a viable treatment strategy for serotonin-related brain-gut axis disorders.

S.M. OMahony; G. Clarke; Y.E. Borre; T.G. Dinan; J.F. Cryan

2015-01-01T23:59:59.000Z

84

Precision tool holder with flexure-adjustable, three degrees of freedom for a four-axis lathe  

DOE Patents [OSTI]

A precision tool holder for precisely positioning a single point cutting tool on 4-axis lathe, such that the center of the radius of the tool nose is aligned with the B-axis of the machine tool, so as to facilitate the machining of precision meso-scale components with complex three-dimensional shapes with sub-.mu.m accuracy on a four-axis lathe. The device is designed to fit on a commercial diamond turning machine and can adjust the cutting tool position in three orthogonal directions with sub-micrometer resolution. In particular, the tool holder adjusts the tool position using three flexure-based mechanisms, with two flexure mechanisms adjusting the lateral position of the tool to align the tool with the B-axis, and a third flexure mechanism adjusting the height of the tool. Preferably, the flexures are driven by manual micrometer adjusters. In this manner, this tool holder simplifies the process of setting a tool with sub-.mu.m accuracy, to substantially reduce the time required to set the tool.

Bono, Matthew J. (Pleasanton, CA); Hibbard, Robin L. (Livermore, CA)

2008-03-04T23:59:59.000Z

85

Vertical-axis wind turbines -- The current status of an old technology  

SciTech Connect (OSTI)

Vertical-axis wind turbine technology is not well understood, even though the earliest wind machines rotated about a vertical axis. The operating environment of a vertical-axis wind turbine is quite complex, but detailed analysis capabilities have been developed and verified over the last 30 years. Although vertical-axis technology has not been widely commercialized, it exhibits both advantages and disadvantages compared to horizontal-axis technology, and in some applications, it appears to offer significant advantages.

Berg, D.E.

1996-12-31T23:59:59.000Z

86

One-Axis Trackers -- Improved Reliability, Durability, Performance, and Cost Reduction; Final Subcontract Technical Status Report, 2 May 2006 - 31 August 2007  

SciTech Connect (OSTI)

The overall objective of this subcontract is to reduce the total cost of electricity generated by single-axis tracking solar energy systems for utility and other large-scale commercial applications by improving performance and reliability and by reducing installation time, cost, and environmental impact.

Shingleton, J.

2008-02-01T23:59:59.000Z

87

Saving Megawatts with Voltage Optimization  

E-Print Network [OSTI]

that had been installed at several electric utility distribution substations in the U.S. and Canada. These systems, being operated in Conservation Voltage Regulation mode, have provided significant energy conservation where they have been installed...

Wilson, T.; Bell, D.

2010-01-01T23:59:59.000Z

88

Inversion of azimuthally dependent NMO velocity in transversely isotropic media with a tilted axis of symmetry  

SciTech Connect (OSTI)

Just as the transversely isotropic model with a vertical symmetry axis (VTI media) is typical for describing horizontally layered sediments, transverse isotropy with a tilted symmetry axis (TTI) describes dipping TI layers (such as tilted shale beds near salt domes) or crack systems. P-wave kinematic signatures in TTI media are controlled by the velocity V{sub PO} in the symmetry direction, Thomsen's anisotropic coefficients {xi} and {delta}, and the orientation (tilt {nu} and azimuth {beta}) of the symmetry axis. Here, the authors show that all five parameters can be obtained from azimuthally varying P-wave NMO velocities measured for two reflectors with different dips and/or azimuths (one of the reflectors can be horizontal). The shear-wave velocity V{sub SO} in the symmetry direction, which has negligible influence on P-wave kinematic signatures, can be found only from the moveout of shear waves. Using the exact NMO equation, the authors examine the propagation of errors in observed moveout velocities into estimated values of the anisotropic parameters and establish the necessary conditions for a stable inversion procedure. Since the azimuthal variation of the NMO velocity is elliptical, each reflection event provides them with up to three constraints on the model parameters. Generally, the five parameters responsible for P-wave velocity can be obtained from two P-wave ellipses, but the feasibility of the moveout inversion strongly depends on the tilt {nu}. While most of the analysis is carried out for a single layer, the authors also extend the inversion algorithm to vertically heterogeneous TTI media above a dipping reflector using the generalized Dix equation. A synthetic example for a strongly anisotropic, stratified TTI medium demonstrates a high accuracy of the inversion.

Grechka, V.; Tsvankin, I.

2000-02-01T23:59:59.000Z

89

Simulation of winds as seen by a rotating vertical axis wind turbine blade  

SciTech Connect (OSTI)

The objective of this report is to provide turbulent wind analyses relevant to the design and testing of Vertical Axis Wind Turbines (VAWT). A technique was developed for utilizing high-speed turbulence wind data from a line of seven anemometers at a single level to simulate the wind seen by a rotating VAWT blade. Twelve data cases, representing a range of wind speeds and stability classes, were selected from the large volume of data available from the Clayton, New Mexico, Vertical Plane Array (VPA) project. Simulations were run of the rotationally sampled wind speed relative to the earth, as well as the tangential and radial wind speeds, which are relative to the rotating wind turbine blade. Spectral analysis is used to compare and assess wind simulations from the different wind regimes, as well as from alternate wind measurement techniques. The variance in the wind speed at frequencies at or above the blade rotation rate is computed for all cases, and is used to quantitatively compare the VAWT simulations with Horizontal Axis Wind Turbine (HAWT) simulations. Qualitative comparisons are also made with direct wind measurements from a VAWT blade.

George, R.L.

1984-02-01T23:59:59.000Z

90

Eucentric four-axis ultrahigh vacuum goniometer for reflection high-energy electron diffraction applications  

SciTech Connect (OSTI)

The design and performance of a four-axis low-profile eucentric UHV goniometer for in situ reflection high-energy electron diffraction (RHEED) studies during film deposition is reported. The design provides one translational and three rotational degrees of freedom that are fully independent. Although developed to facilitate high-pressure RHEED during the growth of oxide thin films by pulsed laser deposition, this goniometer design is applicable to other UHV techniques including molecular beam epitaxy. The goniometer requires only a single DN 100 CF flange (6 in. o.d., 100 mm i.d.), making it suitable for small deposition systems, too. Samples, attached to a resistively heated holder, can be easily transferred on and off of the goniometer without breaking vacuum. The holder accommodates samples up to 10 mmx10 mm in size and allows them to be heated to 900 deg. C in pure oxygen while being attached to the goniometer. Full eucentric motion of the hot sample is possible with a typical axis precision of <0.1 deg. Most of the mechanism is located in air, allowing the use of standard materials and lubricants, substantially reducing the in-vacuum mechanics, and increasing the precision, reliability, and robustness of the system.

Schmehl, A.; Schulz, R.R.; Mannhart, J. [Experimentalphysik VI, Elektronische Korrelationen und Magnetismus, Institut fuer Physik, Universitaet Augsburg, Universitaetsstrasse 1, D-86135 Augsburg (Germany)

2005-12-15T23:59:59.000Z

91

Design of a novel six-axis metrology system for meso-scale nanopositioners  

E-Print Network [OSTI]

The purpose of this research is to develop the best possible means and methods of building a six axis metrology system given cost and space constraints. Six axis measurements are a crucial part of precision engineering and ...

King, Ryan N. (Ryan Nicholas)

2009-01-01T23:59:59.000Z

92

E-Print Network 3.0 - atlas und axis Sample Search Results  

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

axis Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas und axis Page: << < 1 2 3 4 5 > >> 1 Mitteilung fr die Medien Mitteilung fr die Medien...

93

A Multi-Axis Seam Tracking sensor for joining applications  

SciTech Connect (OSTI)

This paper describes the development and use of the Multi-Axis Seam Tracking (MAST) sensor for tracking seams or other features in real-time. Four independent, spatially-distributed electric fields are used to sense changes in the relative position of the sensor and the workpiece. The MAST sensor is very inexpensive compared with commercially available seam tracking sensors. It can be used in systems to perform cost-effective small-lot manufacturing operations in a faster, more consistent manner. The MAST sensor is used in an automated system for dispensing braze paste during a rocket nozzle fabrication process.

Novak, J.L.; Schmitt, D.J. [Sandia National Labs., Albuquerque, NM (United States); Maslakowski, J. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.

1993-11-01T23:59:59.000Z

94

Multi-Axis Seam Tracking using a noncontact capacitive sensor  

SciTech Connect (OSTI)

This paper describes the development and use of the Multi-Axis Seam racking (MAST) sensor for tracking seams or other features in real-time. Four independent, spatially-distributed electric fields are used to sense changes in the relative position of the sensor and the workpiece. The MAST sensor is very inexpensive compared with commercially available seam tracking sensors. It can be used in systems to perform cost-effective small-lot manufacturing operations in a faster, more consistent manner. The MAST sensor is used in an automated system for dispensing braze paste during a rocket nozzle fabrication process.

Novak, J.L.; Schmitt, D.J. [Sandia National Labs., Albuquerque, NM (United States); Maslakowski, J. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.

1993-08-01T23:59:59.000Z

95

Torque ripple in a Darrieus, vertical axis wind turbine  

SciTech Connect (OSTI)

Interaction between a steady wind and a rotating, Darrieus, vertical axis wind turbine produces time periodic aerodynamic loads which cause time dependent torque variations, referred to as torque ripple, to occur in the mechanical link between the turbine and the electrical generator. There is concern for the effect of torque ripple upon fatigue life of drive train components and upon power quality. An analytical solution characterizing the phenomenon of torque ripple has been obtained which is based upon a Fourier expansion of the time dependent features of the problem. Numerical results for torque ripple, some experimental data, determination of acceptable levels and methods of controlling it, are presented and discussed.

Reuter, R.C. Jr.

1980-09-01T23:59:59.000Z

96

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines  

E-Print Network [OSTI]

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines Frank Scheurich of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid of the aerodynamics of a vertical- axis wind turbine that consists of three curved rotor blades that are twisted

McCalley, James D.

97

Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine  

E-Print Network [OSTI]

Experimental investigation of the performance of a diffuser- augmented vertical axis wind turbine Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine by Arash The performance of a vertical axis wind turbine with and without a diffuser was studied using direct force

Victoria, University of

98

Coriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number  

E-Print Network [OSTI]

axis wind turbines (VAWT) offer several advantages over horizontal axis wind turbines (HAWT), namely to yaw wind direction (because they are omnidirectional), and their increased power output in skewed flowCoriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number Hsieh

Colonius, Tim

99

RF generation in the DARHT Axis-II beam dump  

SciTech Connect (OSTI)

We have occasionally observed radio-frequency (RF) electromagnetic signals in the downstream transport (DST) of the second axis linear induction accelerator (LIA) at the dual-axis radiographic hydrodynamic testing (DARHT) facility. We have identified and eliminated some of the sources by eliminating the offending cavities. However, we still observe strong RF in the range 1 GHz t0 2 GHz occurring late in the {approx}2-{micro}s pulse that can be excited or prevented by varying the downstream tune. The narrow frequency width (<0.5%) and near exponential growth at the dominant frequency is indicative of a beam-cavity interaction, and electro-magnetic simulations of cavity structure show a spectrum rich in resonances in the observed frequency range. However, the source of beam produced RF in the cavity resonance frequency range has not been identified, and it has been the subject of much speculation, ranging from beam-plasma or beam-ion instabilities to unstable cavity coupling.

Ekdahl, Carl A. Jr. [Los Alamos National Laboratory

2012-05-03T23:59:59.000Z

100

Thermodynamic study of c-axis-oriented epitaxial Pb(Zr,Ti)O3 thin films  

Science Journals Connector (OSTI)

Thermodynamic characteristics of single crystalline Pb(Zr0.52Ti0.48)O3 (PZT) were investigated using c-axis oriented PZT films. The PZT films were epitaxially grown on Pt/MgO substrate and dielectric and ferroelectric properties were measured as a function of one-dimensional stress. The stress dependence of dielectric and ferroelectric properties was examined on the basis of the Landau-Devonshires phenomenological theory and the free energy coefficients of single crystalline PZT films were obtained. The dielectric stiffness coefficients and electrostrictive coefficient of epitaxial PZT films were obtained to be ?1=-1.30108 (m/F), ?11=3.07108 (m5/C2F), ?111=-3.11107 (m9/C2F), and Q12=-5.7010-2 (m4/C2), which are different from the values derived from the analysis of polycrystalline PZT. The temperature dependence of dielectric constant of the PZT films showed clear Curie-Weiss law and the dielectric stiffness coefficient ?1 derived from this measurement was almost same value from the analysis of stress dependence of the dielectricity of the epitaxial PZT films.

Isaku Kanno; Yu Yokoyama; Hidetoshi Kotera; Kiyotaka Wasa

2004-02-12T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Dual axis translation apparatus and system for translating an optical beam and related method  

DOE Patents [OSTI]

A dual axis translation device and system in accordance with this invention, for translating an optical beam along both an x-axis and a y-axis which are perpendicular to one another, has a beam directing means acting on said optical beam for directing the beam along a particular path transverse to said x and y axes. An arrangement supporting said beam directing means for movement in the x and y direction within a given plane is provided. The arrangement includes a first means for translating said beam directing means along the x-axis in said given plane in order to translate the beam along said x-axis. The arrangement comprises a second means for translating said beam directing means along the y-axis in said given plane in order to translate the beam along said y-axis.

Cassidy, Kelly (Manteca, CA)

1991-01-01T23:59:59.000Z

102

Dynamic behavior analysis for a six axis industrial machining robot  

E-Print Network [OSTI]

The six axis robots are widely used in automotive industry for their good repeatability (as defined in the ISO92983) (painting, welding, mastic deposition, handling etc.). In the aerospace industry, robot starts to be used for complex applications such as drilling, riveting, fiber placement, NDT, etc. Given the positioning performance of serial robots, precision applications require usually external measurement device with complexes calibration procedure in order to reach the precision needed. New applications in the machining field of composite material (aerospace, naval, or wind turbine for example) intend to use off line programming of serial robot without the use of calibration or external measurement device. For those applications, the position, orientation and path trajectory precision of the tool center point of the robot are needed to generate the machining operation. This article presents the different conditions that currently limit the development of robots in robotic machining applications. We ana...

Bisu, Claudiu-Florinel; Grard, Alain; K'Nevez, Jean-Yves

2012-01-01T23:59:59.000Z

103

Dynamic stall occurrence on a horizontal axis wind turbine blade  

SciTech Connect (OSTI)

Surface pressure data from the National Renewable Energy Laboratory`s ``Combined Experiment`` were analyzed to provide a statistical representation of dynamic stall occurrence on a downwind horizontal axis wind turbine (HAWT). Over twenty thousand blade rotational cycles were each characterized at four span locations by the maximum leading edge suction pressure and by the azimuth, velocity, and yaw at which it occurred. Peak suction values at least twice that seen in static wind tunnel tests were taken to be indicative of dynamic stall. The occurrence of dynamic stall at all but the inboard station (30% span) shows good quantitative agreement with the theoretical limits on inflow velocity and yaw that should yield dynamic stall. Two hypotheses were developed to explain the discrepancy at 30% span. Estimates are also given for the frequency of dynamic stall occurrence on upwind turbines. Operational regimes were identified which minimize the occurrence of dynamic stall events.

Shipley, D.E.; Miller, M.S.; Robinson, M.C. [Colorado Univ., Boulder, CO (United States). Dept. of Aerospace Engineering Sciences

1995-07-01T23:59:59.000Z

104

Dual-axis resonance testing of wind turbine blades  

DOE Patents [OSTI]

An apparatus (100) for fatigue testing test articles (104) including wind turbine blades. The apparatus (100) includes a test stand (110) that rigidly supports an end (106) of the test article (104). An actuator assembly (120) is attached to the test article (104) and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (104), with the first and second directions being perpendicular to a longitudinal axis. A controller (130) transmits first and second sets of displacement signals (160, 164) to the actuator assembly (120) at two resonant frequencies of the test system (104). The displacement signals (160, 164) initiate the actuator assembly (120) to impart the forcing loads to concurrently oscillate the test article (104) in the first and second directions. With turbine blades, the blades (104) are resonant tested concurrently for fatigue in the flapwise and edgewise directions.

Hughes, Scott; Musial, Walter; White, Darris

2014-01-07T23:59:59.000Z

105

IR Spectrometer Using 90-degree Off-axis Parabolic Mirrors  

SciTech Connect (OSTI)

A gated spectrometer has been designed for real-time, pulsed infrared (IR) studies at the National Synchrotron Light ource at the Brookhaven National Laboratory. A pair of 90-degree, off-axis parabolic mirrors are used to relay the light from an entrance slit to an output IR recording camera. With an initial wavelength range of 15004500 nm required, gratings could not be used in the spectrometer because grating orders would overlap. A magnesium oxide prism, placed between these parabolic mirrors, serves as the dispersion element. The spectrometer is doubly telecentric. With proper choice of the air spacing between the prism and the second parabolic mirror, any spectral region of interest within the InSb camera arrays sensitivity region can be recorded. The wavelengths leaving the second parabolic mirror are collimated, thereby relaxing the camera positioning tolerance. To set up the instrument, two different wavelength (visible) lasers are introduced at the entrance slit and made collinear with the optical axis via flip mirrors. After dispersion by the prism, these two laser beams are directed to tick marks located on the outside housing of the gated IR camera. This provides first-order wavelength calibration for the instrument. Light that is reflected off the front prism face is coupled into a high-speed detector to verify steady radiance during the gated spectral imaging. Alignment features include tick marks on the prism and parabolic mirrors. This instrument was designed to complement singlepoint pyrometry, which provides continuous time histories of a small collection of spots from shock-heated targets.

Robert M. Malone, Richard, G. Hacking, Ian J. McKenna, and Daniel H. Dolan

2008-09-02T23:59:59.000Z

106

Copper diffusion in single-crystal ?-Zr  

Science Journals Connector (OSTI)

Tracer diffusion of Cu64 in ?-Zr single crystals has been measured in the temperature range (615-860)C. The temperature dependences of the Cu64 diffusion coefficients in directions parallel to and perpendicular to the c axis are given by D?=0.40e-1.54 eVkT and D?=0.25e-1.60 eVkT cm2/sec, respectively. The results are discussed in terms of an interstitial diffusion mechanism.

G. M. Hood and R. J. Schultz

1975-05-15T23:59:59.000Z

107

Control system for a vertical-axis windmill  

DOE Patents [OSTI]

A vertical-axis windmill having a rotating structure is provided with a series of articulated vertical blades whose positions are controlled to maintain a constant RPM for the rotating structure, when wind speed is sufficient. A microprocessor controller is used to process information on wind speed, wind direction and RPM of the rotating structure to develop an electrical signal for establishing blade position. The preferred embodiment of the invention, when connected to a utility grid, is designed to generate 40 kilowatts of power when exposed to a 20 mile per hour wind. The control system for the windmill includes electrical blade actuators that modulate the blades of the rotating structure. Blade modulation controls the blade angle of attack, which in turn controls the RPM of the rotor. In the preferred embodiment, the microprocessor controller provides the operation logic and control functions. A wind speed sensor provides inputs to start or stop the windmill, and a wind direction sensor is used to keep the blade flip region at 90 and 270/sup 0/ to the wind. The control system is designed to maintain constant rotor RPM when wind speed is between 10 and 40 miles per hour.

Brulle, R.V.

1981-09-03T23:59:59.000Z

108

Work-piece alignment for a hybrid multi-axis laser-aided manufacturing system .  

E-Print Network [OSTI]

??"The Laser Aided Manufacturing Process (LAMP) is a multi-axis hybrid manufacturing process comprised of both an additive process, laser deposition, and a subtractive process, CNC (more)

Panackal, Ajay

2006-01-01T23:59:59.000Z

109

Simulation and modeling of flow field around a horizontal axis wind turbine (HAWT) using RANS method.  

E-Print Network [OSTI]

??The principal objective of the proposed CFD analysis is to investigate the flow field around a horizontal axis wind turbine rotor and calculate the turbine's (more)

Sargsyan, Armen.

2010-01-01T23:59:59.000Z

110

Single-shot and single-spot measurement of laser ablation threshold for carbon nanotubes  

E-Print Network [OSTI]

A simple and convenient procedure for single-shot, single-spot ablation threshold measurement has been developed. It is based on the employment of cylindrical lens to obtain elliptical Gaussian laser spot. The ablated spot chords which are parallel to the minor axis were measured across the spot major axis which is proportional to the fluence cross-section thus providing wide range dependence of damaged spot size versus fluence in one spot measurement. For both conventional and new-developed procedures the ablation threshold for typical Nd:YAG laser parameters (1064 nm, 10 ns) has been measured as 50 mJ/cm2 which is one order of magnitude lower than that for a bulk graphite.

Lednev, Vasily N; Obraztsova, Elena D; Kudryashov, Sergey I; Bunkin, Alexey F

2013-01-01T23:59:59.000Z

111

WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES  

E-Print Network [OSTI]

1 WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES J. J. Miau*1 were carried out to study the aerodynamic performance of three vertical axis wind turbines (VAWTs. On the other hand, the characteristics of unsteady flow around the helical wind turbine were studied with a hot

Leu, Tzong-Shyng "Jeremy"

112

Manufacturing Equipment Modeling For a linear axis actuated by an electric motor complete the following  

E-Print Network [OSTI]

Manufacturing Equipment Modeling QUESTION 1 For a linear axis actuated by an electric motor(t). Include the axis disturbance force, but do not include motor electrical dynamics or Coulomb friction For a spindle actuated by an electric motor complete the following: a. Derive a differential equation

Landers, Robert G.

113

Precise Gouging-free Tool Orientations for 5-Axis CNC Machining Yong-Joon Kima  

E-Print Network [OSTI]

Precise Gouging-free Tool Orientations for 5-Axis CNC Machining Yong-Joon Kima , Gershon Elbera-free tool paths for 5-axis CNC machining of freeform NURBS surfaces using flat-end and rounded-end (bull modeling and have been widely used in a variety of applications. Consequently, CNC machining of NURBS

Pottmann, Helmut

114

Dynamic behavior analysis for a six axis industrial machining BISU Claudiu1,a  

E-Print Network [OSTI]

Dynamic behavior analysis for a six axis industrial machining robot BISU Claudiu1,a , CHERIF Mehdi2-yves.knevez@u-bordeaux1.fr Abstract The six axis robots are widely used in automotive industry for their good repeatability (as defined in the ISO92983) (painting, welding, mastic deposition, handling etc

Paris-Sud XI, Université de

115

Two Oppositely Localised Frizzled RNAs as Axis Determinants in a Cnidarian Embryo  

E-Print Network [OSTI]

ascidian and sea urchin embryos, promoting endoderm/mesoderm fates, and in domains offset from the vegetalTwo Oppositely Localised Frizzled RNAs as Axis Determinants in a Cnidarian Embryo Tsuyoshi Momose) Two oppositely localised Frizzled RNAs as axis determinants in a cnidarian embryo. PLoS Biol 5(4): e70

Villefranche sur mer

116

Near wake properties of horizontal axis marine current L. Myers and A.S. Bahaj  

E-Print Network [OSTI]

1 Near wake properties of horizontal axis marine current turbines L. Myers and A.S. Bahaj wake region of a tidal current turbine is strongly driven by the combined wake of the device support-scale horizontal axis turbine has been have been measured in a large water channel facility. A downstream map

Quartly, Graham

117

Comparison of Different Approaches for the Calculation of Projective Symmetry or the Axis of a SHGC  

E-Print Network [OSTI]

Comparison of Different Approaches for the Calculation of Projective Symmetry or the Axis of a SHGC;Comparison of Different Approaches for the Calculation of Projective Symmetry or the Axis of a SHGC Sven]. And although the projections of straight homogeneous generalised cylinders (SHGC) generally exhibit no symmetry

Hamburg,.Universität

118

CYCLOTRON HEATING NFR THE MULTIPOLE B = 0 AXIS J. C. Sprott  

E-Print Network [OSTI]

CYCLOTRON HEATING NFR THE MULTIPOLE B = 0 AXIS by J. C. Sprott November 1973 PLP 536 Plasma Studies of the author and major professor. #12;Ion and Electron Cyclotron heating rates in multipoles are generally = 0 axis in a multipole. The average cyclotron heating rate is given by d--= dt where TIB G 0 = TI

Sprott, Julien Clinton

119

CTAX: the US/Japan Cold Neutron Triple-Axis Spectromete at HFIR | ORNL  

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

CTAX-US/Japan Cold Neutron Triple-Axis Spectrometer CTAX-US/Japan Cold Neutron Triple-Axis Spectrometer CTAX US/Japan Cold Neutron Triple-Axis Spectrometer (CG-4C). (larger image) The U.S.-Japan Cold Neutron Triple-Axis Spectrometer (CTAX) is a conventional triple-axis spectrometer with variable incident energy and variable monochromator-sample and sample-analyzer distances. The cold guide 4 bender and guide hall shielding reduce background levels at CG-4C, and the 15-cm-tall guide profile is well exploited by CG-4C's vertically focusing monochromator (PG 002). To enhance accommodation of strong magnetic fields at the sample position and to simplify future polarization analysis, the amount of ferromagnetic material has been minimized in the construction of this instrument. CG-4C is a collaboration of Oak Ridge National Laboratory, the Neutron

120

Early time implosion symmetry from two-axis shock-timing measurements on indirect drive NIF experiments  

SciTech Connect (OSTI)

An innovative technique has been developed and used to measure the shock propagation speed along two orthogonal axes in an inertial confinement fusion indirect drive implosion target. This development builds on an existing target and diagnostic platform for measuring the shock propagation along a single axis. A 0.4?mm square aluminum mirror is installed in the ablator capsule which adds a second orthogonal view of the x-ray-driven shock speeds. The new technique adds capability for symmetry control along two directions of the shocks launched in the ablator by the laser-generated hohlraum x-ray flux. Laser power adjustments in four different azimuthal cones based on the results of this measurement can reduce time-dependent symmetry swings during the implosion. Analysis of a large data set provides experimental sensitivities of the shock parameters to the overall laser delivery and in some cases shows the effects of laser asymmetries on the pole and equator shock measurements.

Moody, J. D., E-mail: moody4@llnl.gov; Robey, H. F.; Celliers, P. M.; Munro, D. H.; Barker, D. A.; Baker, K. L.; Dppner, T.; Hash, N. L.; Berzak Hopkins, L.; LaFortune, K.; Landen, O. L.; LePape, S.; MacGowan, B. J.; Ralph, J. E.; Ross, J. S.; Widmayer, C. [Lawrence Livermore National Laboratory, Livermore, California 94551 (United States); Nikroo, A.; Giraldez, E. [General Atomics, San Diego, California 92186-5608 (United States); Boehly, T. [Laboratory for Laser Energetics, Rochester, New York 14623-1299 (United States)

2014-09-15T23:59:59.000Z

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


121

Satellite orbit and attitude estimation using three-axis magnetometer  

Science Journals Connector (OSTI)

The determination of satellite orbital and attitude position and velocity from measurement of a single earth magnetic field (emf) vector without additional measurements, but using a state estimator, is a challenging problem. It is not obvious from first glance whether a solution exists at all - whether the problem is observable with the measurement of only a single emf vector, and an analysis is necessary. This paper performs this analysis for a simple linear system model. Almost circular low earth nearly polar orbits and a dipole emf model are considered. Although these are rather restrictive assumptions they nevertheless provide considerable insight. Both a purely algebraic situation as well as dynamic estimation are studied. It is shown that if the emf induction vector magnitude is used to estimate satellite orbit (position and velocity) and its three projections are used to estimate the attitude, that the situation is sufficiently observable for orbit and attitude determination using just magnetometer measurements. However, for nearly polar orbits, longitude and east velocity are difficult to estimate due to weak observability, and estimation convergence time can be lengthy with poor accuracy.

Y. Kim; G. Vukovich

2014-01-01T23:59:59.000Z

122

Annual performance prediction for off-axis aligned Lugo heliostats at Solar Two  

SciTech Connect (OSTI)

The DELSOL computer code was used to model the annual Performance for numerous off-axis alignments of the Lugo heliostats located at the Solar Two site in Dagget, California. Recommended canting times are presented for the Lugo heliostats based upon their location in the field. Predicted annual performance of an off-axis alignment was actually higher than for on-axis alignment in some cases, and approximately equal if the recommended times are used. The annual performances of Solar One heliostats located nearby were also calculated, and illustrated the poorer performance expected of the Lugo heliostats.

Jones, S.A.

1996-02-01T23:59:59.000Z

123

Model-Based Estimation of Off-Highway Road Geometry using Single-Axis LADAR and Inertial Sensing  

E-Print Network [OSTI]

Submitted, 2006 International Conference on Robotics and Automation Abstract-- This paper applies some for a variety of automotive applications in intelligent transporta- tion systems, because it enables prediction estimation schemes for road estimation to "off-highway" environments, where roads are typically not painted

Murray, Richard M.

124

Design, fabrication, and testing of a three-dimensional monolithic compliant six-axis nanopositioner  

E-Print Network [OSTI]

The purpose of this research was to demonstrate the feasibility for creating a three-dimensional monolithic compliant six-axis nanopositioner. Much of this work was based off of the original two-dimensional HexFlex manipulator ...

Labuz, James (James R.)

2006-01-01T23:59:59.000Z

125

Advanced Technology Solar Telescope 4.2 m Off-axis Primary Mirror Fabrication  

Science Journals Connector (OSTI)

Advanced optical surfacing technologies are applied for the Advanced Technology Solar Telescope 4.2 m off-axis primary mirror fabrication. A newly developed Stressed lap and IR...

Kim, Dae Wook; Oh, Chang Jin; Su, Peng; Burge, James H

126

E-Print Network 3.0 - axis neutron spectrometer Sample Search...  

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

results for: axis neutron spectrometer Page: << < 1 2 3 4 5 > >> 1 For more information: Neutron Scattering Science User Office, neutronusers@ornl.gov or (865) 574-4600. Summary:...

127

Regulation Of Fshr And SF-1 In The Hypothalamus-Pituitary-Gonadal (HPG) Axis.  

E-Print Network [OSTI]

Mammalian reproduction is highly dependent on the delicate balance of signals within the hypothalamic-pituitary-gonadal (HPG) axis that maintains proper endocrine environment. One of the key signals is the pituitary ...

George, Jitu Wilson

2013-08-31T23:59:59.000Z

128

Analysis and Strategies for Five-Axis Near-Dry EDM Milling.  

E-Print Network [OSTI]

??Strategies for precision five-axis near-dry electric discharge machining (EDM) milling are investigated. By understanding the material removal process behind near-dry EDM milling, its performance can (more)

Fujiki, Masahiro

2009-01-01T23:59:59.000Z

129

A process planning strategy for multi-axis hybrid manufacturing process  

Science Journals Connector (OSTI)

This paper outlines a process planning strategy for a multi-axis hybrid manufacturing process that includes a metal deposition system and a multi-axis CNC machining system to rapidly manufacture precision metal parts. Different from the current layered manufacturing processes of which build direction is fixed throughout the process, the orientation of the part can affect the non-support buildability in the multi-axis hybrid manufacturing process. However, each orientation that satisfies the buildability and other constraints may not be unique. In this case, the final optimal orientation is determined based on build time. The build time computation algorithm for multi-axis hybrid system is presented in this paper. To speed up the exhaustive search for the optimal orientation, a multi-stage algorithm is developed to reduce the search space. A case study is used as an example to show the process planning strategy.

Jun Zhang; Jianzhong Ruan; Frank Liou

2013-01-01T23:59:59.000Z

130

Study of Reflected Shock Wave Perturbations at the Central Axis of Dense Plasma Column in a Plasma Focus  

Science Journals Connector (OSTI)

When the shock front (SF) hits the central axis of plasma focus device, a reflected shock moves radially outwards...

Morteza Habibi

2011-12-01T23:59:59.000Z

131

Ball nose milling cutter radius compensation in Z axis for CNC  

Science Journals Connector (OSTI)

A new AutoCAD/VisualLISP based method to substitute the 3D tool radius compensation in Z axis for CNC milling processes is here described. Specific features of VisualLISP programming language combined with AutoCAD facilities are used to gather the data ... Keywords: AutoCAD VisualLISP, CNC milling, Z axis compensation, complex shaped parts, tool radius compensation

Dragoi Mircea Viorel

2009-02-01T23:59:59.000Z

132

FSI Modeling of Vertical-Axis Wind Turbines Y. Bazilevs, A. Korobenko, X. Deng, and J. Yan  

E-Print Network [OSTI]

FSI Modeling of Vertical-Axis Wind Turbines Y. Bazilevs, A. Korobenko, X. Deng, and J. Yan-dependent aerodynamics and fluid-structure interaction (FSI) simula- tions of a Darrieus-type vertical-axis wind turbine compared to the vertical-axis wind turbine (VAWT) designs. However, smaller-size VAWTs are more suitable

Dabiri, John O.

133

Proto-Model of an Infrared Wide-Field Off-Axis Telescope  

E-Print Network [OSTI]

We develop a proto-model of an off-axis reflective telescope for infrared wide-field observations based on the design of Schwarzschild-Chang type telescope. With only two mirrors, this design achieves an entrance pupil diameter of 50 mm and an effective focal length of 100 mm. We can apply this design to a mid-infrared telescope with a field of view of 8 deg X 8 deg. In spite of the substantial advantages of off-axis telescopes in the infrared compared to refractive or on-axis reflective telescopes, it is known to be difficult to align the mirrors in off-axis systems because of their asymmetric structures. Off-axis mirrors of our telescope are manufactured at the Korea Basic Science Institute (KBSI). We analyze the fabricated mirror surfaces by fitting polynomial functions to the measured data. We accomplish alignment of this two-mirror off-axis system using a ray tracing method. A simple imaging test is performed to compare a pinhole image with a simulated prediction.

Kim, Sanghyuk; Chang, Seunghyuk; Kim, Geon Hee; Yang, Sun Choel; Kim, Myung Sang; Lee, Sungho; Lee, Hanshin; 10.5303/JKAS.2010.43.5.169

2010-01-01T23:59:59.000Z

134

Design and implementation of five-axis transformation function in CNC system  

Science Journals Connector (OSTI)

Abstract To implement five-axis functions in CNC system, based on domestic system Lan Tian series, an improved design method for the system software structure is proposed in this paper. The numerical control kernel of CNC system is divided into the task layer and the motion layer. A five-axis transformation unit is integrated into the motion layer. After classifying five-axis machines into different types and analyzing their geometry information, the five-axis kinematic library is designed according to the abstract factory pattern. Furthermore, by taking CA spindle-tilting machine as an example, the forward and the inverse kinematic transformations are deduced. Based on the new software architecture and the five-axis kinematic library, algorithms of RTCP (rotation tool center point control) and 3D radius compensation for end-milling are designed and realized. The milling results show that, with five-axis functions based on such software structure, the instructions with respect to the cutters position and orientation can be directly carried out in the CNC system.

Feng Wang; Hu Lin; Liaomo Zheng; Lei Yang; Jinjin Feng; Han Zhang

2014-01-01T23:59:59.000Z

135

Single-Use Recycling  

Science Journals Connector (OSTI)

Single-use recycling is specially used oil treatment, generating recycled product for a single finite reuse.

2014-01-01T23:59:59.000Z

136

Inverse kinematics for optimal tool orientation control in 5-axis CNC machining  

Science Journals Connector (OSTI)

Abstract The problem of determining the inputs to the rotary axes of a 5-axis CNC machine is addressed, such that relative variations of orientation between the tool axis and surface normal are minimized subject to the constraint of maintaining a constant cutting speed with a ball-end tool. In the context of an orientable-spindle machine, the results of a prior study are directly applicable to the solution of this inverse-kinematics problem. However, since they are expressed in terms of the integral of the geodesic curvature, a discrete time-step solution is proposed that yields accurate rotary-axis increments at high sampling frequencies. For an orientable-table machine, a closed-form solution that specifies the rotary-axis positions as functions of the surface normal variation along the toolpath is possible. In this context, however, the feasibility of a solution is dependent upon the surface normal along the toolpath satisfying certain orientational constraints. These inverse-kinematics solutions facilitate accurate and efficient 5-axis machining of free-form surfaces without unnecessary actuation of the machine rotary axes.

Rida T. Farouki; Chang Yong Han; Shiqiao Li

2014-01-01T23:59:59.000Z

137

Power performance of canted blades for a vertical axis wind turbine  

Science Journals Connector (OSTI)

Small scale vertical axis wind turbines have a number of advantages for deployment in an urban environment but are subject to highly varying thrust and radial aerodynamic forces. Helical blade shapes for vertical axis wind turbines can reduce load fluctuations during turbine operation; however a helix has complicated three-dimensional geometry that can be difficult to manufacture resulting in expensive blades. A new blade configuration based on twisted straight blades that are mounted at an angle to the vertical a cant has been developed and tested in a wind tunnel in a number of different configurations and conditions. They offer the benefits of distributing the fluctuating aerodynamic loads but incorporate a linear axis so that they can be manufactured at a comparable cost to simple straight blades. The power performance data from the tunnel testing show that canted blades have comparable power output to similar straight blades and that aerodynamic fences can be used to improve power performance.

Shawn Armstrong; Stephen Tullis

2011-01-01T23:59:59.000Z

138

Development and Test Plans for a small Vertical Axis Turbine Designed and  

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

Development and Test Plans for a small Vertical Axis Turbine Designed and Development and Test Plans for a small Vertical Axis Turbine Designed and Built by the Russian State Rocket Center under Berkeley Lab auspices Speaker(s): Anthony Radspieler Jr. Glen Dahlbacka Joseph Rasson Date: March 4, 2010 - 12:00pm Location: 90-3122 Berkeley Lab Engineering Division teamed with Empire Magnetics, Rohnert Park and the Makeyev State Rocket Center under a DOE NNSA non-proliferation project to develop and test a series of small wind turbines of vertical axis design. Over the years, about 100 Russian scientists and engineers worked on the project and the hydrodynamic, aerodynamic and mechanical test facilities of the SRC were used. The objective was to create a highly manufacturable Darieus unit with a modest Tip Speed Ratio (quiet and low

139

Energy Production Demonstrator for Megawatt Proton Beams  

E-Print Network [OSTI]

A preliminary study of the Energy Production Demonstrator (EPD) concept - a solid heavy metal target irradiated by GeV-range intense proton beams and producing more energy than consuming - is carried out. Neutron production, fission, energy deposition, energy gain, testing volume and helium production are simulated with the MARS15 code for tungsten, thorium, and natural uranium targets in the proton energy range 0.5 to 120 GeV. This study shows that the proton energy range of 2 to 4 GeV is optimal for both a natU EPD and the tungsten-based testing station that would be the most suitable for proton accelerator facilities. Conservative estimates, not including breeding and fission of plutonium, based on the simulations suggest that the proton beam current of 1 mA will be sufficient to produce 1 GW of thermal output power with the natU EPD while supplying < 8% of that power to operate the accelerator. The thermal analysis shows that the concept considered has a problem due to a possible core meltdown; however, a number of approaches (a beam rastering, in first place) are suggested to mitigate the issue. The efficiency of the considered EPD as a Materials Test Station (MTS) is also evaluated in this study.

Vitaly S. Pronskikh; Nikolai Mokhov; Igor Novitski; Sergey I. Tyutyunnikov

2014-07-16T23:59:59.000Z

140

Developing Mt. Hope: The megawatt line  

SciTech Connect (OSTI)

After facing numerous obstacles, including opposition and competition, the Mt. Hope pumped-storage project in New Jersey has been licensed by FERC. That license will allow a former iron ore mine site to be used in producing a new resource-hydroelectricity. In early August 1992, after more than seven years of effort, the 2,000-MW Mt. Hope Waterpower Project was licensed by the Federal Energy Regulatory Commission (FERC). Getting the $1.8 billion pumped-storage project licensed was not an easy task. It involved 54 submittals to FERC, six public meetings, and costs of more than $12 million. Along the way, the project has withstood competing applications, community opposition, and legal battles. Getting a project of this magnitude off the ground is a challenge for even the most experienced developer. The effort was especially challenging for the Halecrest Company, a local family-owned and operated firm with no previous experience in hydroelectric development. When financing became tight, creative ways were found to raise seed capital for the project. When hydroelectric experience was needed, the company developed a world-class corporate team that carried Mt. Hope through the complexities of the licensing process and beyond. With license now in hand, the project developers are ready to move forward with negotiating power sales contracts and securing construction financing. The resulting project will be the second largest pumped-storage facility in the country-second only to the 2,100-MW Bath County project in Virginia. Mt. Hope will take six years to construct and is scheduled to be phased into operation beginning in 1999.

Rodzianko, P.; Fisher, F.S.

1992-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

A two-dimensional matrix correction for off-axis portal dose prediction errors  

SciTech Connect (OSTI)

Purpose: This study presents a follow-up to a modified calibration procedure for portal dosimetry published by Bailey et al. ['An effective correction algorithm for off-axis portal dosimetry errors,' Med. Phys. 36, 4089-4094 (2009)]. A commercial portal dose prediction system exhibits disagreement of up to 15% (calibrated units) between measured and predicted images as off-axis distance increases. The previous modified calibration procedure accounts for these off-axis effects in most regions of the detecting surface, but is limited by the simplistic assumption of radial symmetry. Methods: We find that a two-dimensional (2D) matrix correction, applied to each calibrated image, accounts for off-axis prediction errors in all regions of the detecting surface, including those still problematic after the radial correction is performed. The correction matrix is calculated by quantitative comparison of predicted and measured images that span the entire detecting surface. The correction matrix was verified for dose-linearity, and its effectiveness was verified on a number of test fields. The 2D correction was employed to retrospectively examine 22 off-axis, asymmetric electronic-compensation breast fields, five intensity-modulated brain fields (moderate-high modulation) manipulated for far off-axis delivery, and 29 intensity-modulated clinical fields of varying complexity in the central portion of the detecting surface. Results: Employing the matrix correction to the off-axis test fields and clinical fields, predicted vs measured portal dose agreement improves by up to 15%, producing up to 10% better agreement than the radial correction in some areas of the detecting surface. Gamma evaluation analyses (3 mm, 3% global, 10% dose threshold) of predicted vs measured portal dose images demonstrate pass rate improvement of up to 75% with the matrix correction, producing pass rates that are up to 30% higher than those resulting from the radial correction technique alone. As in the 1D correction case, the 2D algorithm leaves the portal dosimetry process virtually unchanged in the central portion of the detector, and thus these correction algorithms are not needed for centrally located fields of moderate size (at least, in the case of 6 MV beam energy).Conclusion: The 2D correction improves the portal dosimetry results for those fields for which the 1D correction proves insufficient, especially in the inplane, off-axis regions of the detector. This 2D correction neglects the relatively smaller discrepancies that may be caused by backscatter from nonuniform machine components downstream from the detecting layer.

Bailey, Daniel W. [Department of Physics, State University of New York at Buffalo, Buffalo, New York 14260 (United States); Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Kumaraswamy, Lalith; Bakhtiari, Mohammad [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Podgorsak, Matthew B. [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 and Department of Physiology and Biophysics, State University of New York at Buffalo, Buffalo, New York 14214 (United States)

2013-05-15T23:59:59.000Z

142

Neutron Experiment descriptions: N1: Triple-Axis Spectrometers, HFIR HB1A & HB3  

E-Print Network [OSTI]

Neutron Experiment descriptions: N1: Triple-Axis Spectrometers, HFIR HB1A & HB3 Spin wave2A Magnetic structure of NiO Neutron diffraction measurements will be performed to investigate 600K to 288K, using the Neutron Powder Diffractometer at the HFIR. Rietveld analysis of the crystal

Pennycook, Steve

143

Rotation Angle for the Optimum Tracking of One-Axis Trackers  

SciTech Connect (OSTI)

An equation for the rotation angle for optimum tracking of one-axis trackers is derived along with equations giving the relationships between the rotation angle and the surface tilt and azimuth angles. These equations are useful for improved modeling of the solar radiation available to a collector with tracking constraints and for determining the appropriate motor revolutions for optimum tracking.

Marion, W. F.; Dobos, A. P.

2013-07-01T23:59:59.000Z

144

Tilt display demonstration: a display surface with multi-axis tilt & actuation  

Science Journals Connector (OSTI)

This demonstration accompanies a full paper accepted into MobileHCI '12 [1]. We demonstrate a new type of actuatable display, called a Tilt Display, that provides visual feedback combined with multi-axis tilting and vertical actuation. Its ability to ... Keywords: actuated displays, nonplanar surface interaction, physical actuation, tilt displays

Jason Alexander; Andrs Lucero; Sriram Subramanian

2012-09-01T23:59:59.000Z

145

Tilt displays: designing display surfaces with multi-axis tilting and actuation  

Science Journals Connector (OSTI)

We present a new type of actuatable display, called Tilt Displays, that provide visual feedback combined with multi-axis tilting and vertical actuation. Their ability to physically mutate provides users with an additional information channel that facilitates ... Keywords: actuated displays, non-planar surface interaction, physical actuation, tilt displays

Jason Alexander; Andrs Lucero; Sriram Subramanian

2012-09-01T23:59:59.000Z

146

Maximum Feedrate Interpolator for Multi-axis CNC Machining with Jerk Constraints  

E-Print Network [OSTI]

Maximum Feedrate Interpolator for Multi-axis CNC Machining with Jerk Constraints X. Beudaert, S name@lurpa.ens-cachan.fr Abstract A key role of the CNC is to perform the feedrate interpolation which for the next point along the path is computed. Examples and comparisons with an industrial CNC demonstrate

Paris-Sud XI, Université de

147

Journal of Vegetation Science && (2012) Salinity tolerance and the decoupling of resource axis  

E-Print Network [OSTI]

functional trade-offs are present along a gradient of low to high salinity? Location: New York State, USA and salinity gradients at three sites using principal compo- nents, correlation and fourth-corner analysesJournal of Vegetation Science && (2012) Salinity tolerance and the decoupling of resource axis

Fridley, Jason D.

148

MAGNETIC NEUTRON SCATTERING. And Recent Developments in the Triple Axis Spectroscopy  

E-Print Network [OSTI]

Chapter 1 MAGNETIC NEUTRON SCATTERING. And Recent Developments in the Triple Axis Spectroscopy Igor.................................................................................... 2 2. Neutron interaction with matter and scattering cross-section ........ 6 2.1 Basic scattering theory and differential cross-section................ 7 2.2 Neutron interactions and scattering lengths

Johnson, Peter D.

149

A methodology for process parameter selection in five axis laser cladding  

Science Journals Connector (OSTI)

Laser cladding industrial development is becoming an important target for high added value parts manufacturing sectors. Aeronautical or automotive industries are accomplishing great investments in order to understand the process and minimise tuning step costs now paired with. At the moment, the process is applied to three axis or 3 + 2 axis strategies, being numerous works focused on the obtainment of process parameters. All of them try to minimise the number of experimental tests necessary to optimise the great variable involving the process. These variables increase when using laser cladding on five axis kinematics in order to accomplish new targets of industrial sectors which include complex parts with complex surface to clad. The work presents a methodology which helps to choose optimal parameters for five axis laser cladding. A weighted criterion is used in order to discern between different parameters taking into account process requirements. The methodology has been used on two materials and different objectives have been established for the criterion in each one. Finally, two test parts are presented as methodology validation in industrial applications.

Iván Tabernero; Amaia Calleja; Aitzol Lamikiz; Luis Norberto López de Lacalle

2014-01-01T23:59:59.000Z

150

Hydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles  

E-Print Network [OSTI]

-sized Fe3O4 have been prepared by various methods such as sol­ gel processing, hydrothermal synthesisHydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles Jülich, Germany. Abstract. The hydrothermal synthesis of Fe3O4 nanoparticles (NPs) (

Dunin-Borkowski, Rafal E.

151

First-order design of off-axis reflective ophthalmic adaptive optics systems using afocal  

E-Print Network [OSTI]

First-order design of off-axis reflective ophthalmic adaptive optics systems using afocal for designing laser cavities, spectrographs and adaptive optics retinal imaging systems. The use, range respectively. This is discussed using examples from adaptive optics retinal imaging systems. The performance

152

Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.  

SciTech Connect (OSTI)

C-axis current flow in high temperature superconductor (HTS) tape-shaped wires arises in configurations where the local wire axis is not perpendicular to the local magnetic field, such as in power cables with helically wound HTS tapes. The c-axis critical current density J{sub c}{sup c} has been recently found to be orders of magnitude lower than the ab-plane critical current density J{sub c}{sup ab}. Here we report on J{sub c}{sup c} (77 K, sf) values of various YBa{sub 2}Cu{sub 3}O{sub 7}-based (YBCO) tapes with different microstructures. Our results show that the value of J{sub c}{sup c} (77 K, sf) decreases significantly with increasing concentration of ab-plane stacking faults in YBCO thin films and that the critical current anisotropy {gamma} = J{sub c}{sup ab}/J{sub c}{sup c} can reach values as high as 2070, implying that in the highest-anisotropy tape, {approx}20% of the tape width carries c-axis current in a helically wound power cable.

Jia, Y.; Welp, U.; Crabtree, G. W.; Kwok, W. K.; Malozemoff, A. P.; Rupich, M. W.; Fleshler, S.; Clem, J. R. (Materials Science Division); (American Superconductor Corp.); (Ames Lab.); (Iowa State Univ.)

2011-10-01T23:59:59.000Z

153

Origin of a magnetic easy axis in pipeline steel L. Clapham,a)  

E-Print Network [OSTI]

Origin of a magnetic easy axis in pipeline steel L. Clapham,a) C. Heald, T. Krause, and D. L December 1998; accepted for publication 27 April 1999 Oil and gas pipelines are generally magnetically overlooked, the magnetic properties of oil and gas pipelines are an important consideration since the most

Clapham, Lynann

154

Multi-Fidelity Uncertainty Quantification: Application to a Vertical Axis Wind Turbine Under an  

E-Print Network [OSTI]

. Introduction Quantifying the response of a wind turbine to an extreme wind gust is an important designMulti-Fidelity Uncertainty Quantification: Application to a Vertical Axis Wind Turbine Under an Extreme Gust A. Santiago Padr´on , Juan J. Alonso and Francisco Palacios Stanford University, Stanford, CA

Alonso, Juan J.

155

Multi-Body Unsteady Aerodynamics in 2D Applied to aVertical-Axis Wind Turbine Using a Vortex Method.  

E-Print Network [OSTI]

?? Vertical axis wind turbines (VAWT) have many advantages over traditional Horizontalaxis wind turbines (HAWT).One of the more severe problem of VAWTs are the complicated (more)

sterberg, David

2010-01-01T23:59:59.000Z

156

4056 IEEE SENSORS JOURNAL, VOL. 13, NO. 10, OCTOBER 2013 Design and Characterization of a Soft Multi-Axis  

E-Print Network [OSTI]

4056 IEEE SENSORS JOURNAL, VOL. 13, NO. 10, OCTOBER 2013 Design and Characterization of a Soft Multi-Axis Force Sensor Using Embedded Microfluidic Channels Daniel M. Vogt, Member, IEEE, Yong-Lae Park system. We describe the design, fabrication, and characterization of a novel soft multi-axis force sensor

Park, Yong-Lae

157

Dielectric and ferroelectric properties of c-axis oriented strontium bismuth tantalate thin films applied transverse electric fields  

E-Print Network [OSTI]

Dielectric and ferroelectric properties of c-axis oriented strontium bismuth tantalate thin films and ferroelectric properties of c-axis oriented epitaxial strontium bismuth tantalate SBT thin films were American Institute of Physics. DOI: 10.1063/1.2205351 I. INTRODUCTION Strontium bismuth tantalate SBT has

Tonouchi, Masayoshi

158

Single-Molecule Detection  

Science Journals Connector (OSTI)

Detection of single molecules represents the ultimate level of sensitivity and ... background, fluorescence is one obvious choice for single-molecule detection (SMD). However, SMD using ... first report on SMD us...

2006-01-01T23:59:59.000Z

159

ANL/APS/TB-32 Test of Horizontal Field Measurements Using Two-Axis Hall  

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

2 2 Test of Horizontal Field Measurements Using Two-Axis Hall Probes at the APS Magnetic Measurement Facility I. Vasserman Advanced Photon Source Argonne National Laboratory Argonne, IL 60439 1. Introduction The free-electron laser (FEL) project at the Advanced Photon Source (APS) will use a 400-MeV particle beam from the APS linac with RMS beam transverse size of 100 µm and requires very high performance of the insertion devices in order to achieve high intensity radiation. Averaged over period, the trajectory must deviate from the ideal on-axis trajectory by not more than 10% of the RMS beam size. Meaning that the second field integral should be straight within ±1300 G-cm 2 over the length of the device for both horizontal and vertical directions for the 400-MeV particle

160

Easy axis alignment of chemically partially ordered FePt nanoparticles  

SciTech Connect (OSTI)

Partially ordered Fe{sub 53}Pt{sub 47} nanoparticles with size around 8 nm were prepared by the simultaneous decomposition of iron pentacarbonyl and platinum acetylacetonate. The high boiling point chemical, hexadecylamine, was used as a solvent, and 1-adamantanecarboxylic acid was used as a stabilizer. X-ray diffraction measurements reveal that as-made FePt particles were partially transformed into the ordered L1{sub 0} phase with some weak superlattice peaks. The room-temperature hysteresis loop and remanence curve suggest a broad distribution of anisotropies in the partially ordered particles. By coating the partially ordered FePt nanoparticles with a polyvinylchloride polymer binder, the particles could be re-dispersed in cyclohexanone. Furthermore, the easy axis of the particles coated with the polyvinylchloride polymer binder could be aligned under an external field. Easy axis alignment was confirmed from both alternating gradient magnetometer and x-ray diffraction measurements.

Kang, Shishou; Jia Zhiyong; Shi, Shifan; Nikles, David E.; Harrell, J.W. [Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)

2005-02-07T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Axi-symmetrical flow reactor for [sup 196]Hg photochemical enrichment  

DOE Patents [OSTI]

The present invention is directed to an improved photochemical reactor useful for the isotopic enrichment of a predetermined isotope of mercury, especially, [sup 196]Hg. Specifically, two axi-symmetrical flow reactors were constructed according to the teachings of the present invention. These reactors improve the mixing of the reactants during the photochemical enrichment process, affording higher yields of the desired [sup 196]Hg product. Measurements of the variation of yield (Y) and enrichment factor (E) along the flow axis of these reactors indicates very substantial improvement in process uniformity compared to previously used photochemical reactor systems. In one preferred embodiment of the present invention, the photoreactor system was built such that the reactor chamber was removable from the system without disturbing the location of either the photochemical lamp or the filter employed therewith. 10 figures.

Grossman, M.W.

1991-04-30T23:59:59.000Z

162

Lattice Boltzmann method for heat diffusion in axis-symmetric geometries  

Science Journals Connector (OSTI)

Lattice Boltzmann Methods (LBM) have been used to solve momentum, heat and mass transport equations mainly in Cartesian coordinate system. In the present work, the LBM is extended to solve transports in axis-symmetric geometries, such as pipes and spheres. Heat diffusion and conduction in solids without and with heat generation were tested. The heat diffusion equation for axis-symmetric problem is reduced to diffusion equation as in Cartesian coordinate with an extra term due to the surface area variation along the radial direction. The extra term is treated as a source term (forcing term) in LBM. The extra term can be approximated by using finite difference or more accurately as a flux term. The results predicted by LBM are well compared with analytical solutions and finite volume method.

A.A. Mohamad

2009-01-01T23:59:59.000Z

163

Virtual machining considering dimensional, geometrical and tool deflection errors in three-axis CNC milling machines  

Science Journals Connector (OSTI)

Abstract Virtual manufacturing systems can provide useful means for products to be manufactured without the need of physical testing on the shop floor. As a result, the time and cost of part production can be decreased. There are different error sources in machine tools such as tool deflection, geometrical deviations of moving axis and thermal distortions of machine tool structures. Some of these errors can be decreased by controlling the machining process and environmental parameters. However other errors like tool deflection and geometrical errors which have a big portion of the total error, need more attention. This paper presents a virtual machining system in order to enforce dimensional, geometrical and tool deflection errors in three-axis milling operations. The system receives 21 dimensional and geometrical errors of a machine tool and machining codes of a specific part as input. The output of the system is the modified codes which will produce actual machined part in the virtual environment.

Mohsen Soori; Behrooz Arezoo; Mohsen Habibi

2014-01-01T23:59:59.000Z

164

An Einstein-Hilbert Action for Axi-Dilaton Gravity in 4-Dimensions  

E-Print Network [OSTI]

We examine the axi-dilatonic sector of low energy string theory and demonstrate how the gravitational interactions involving the axion and dilaton fields may be derived from a geometrical action principle involving the curvature scalar associated with a non-Riemannian connection. In this geometry the antisymmetric tensor 3-form field determines the torsion of the connection on the frame bundle while the gradient of the metric is determined by the dilaton field. By expressing the theory in terms of the Levi-Civita connection associated with the metric in the ``Einstein frame'' we confirm that the field equations derived from the non-Riemannian Einstein-Hilbert action coincide with the axi-dilaton sector of the low energy effective action derived from string theory.

T Dereli; Robin W Tucker

1995-02-08T23:59:59.000Z

165

Magnetic axis safety factor of finite $\\beta$ spheromaks and transition from spheromaks to toroidal magnetic bubbles  

E-Print Network [OSTI]

The value of the safety factor on the magnetic axis of a finite-beta spheromak is shown to be a function of beta in contrast to what was used in P. M. Bellan, Phys. Plasmas 9, 3050 (2002); this dependence on beta substantially reduces the gradient of the safety factor compared to the previous calculation. The method for generating finite-beta spheromak equilibria is extended to generate equilibria describing toroidal magnetic "bubbles" where the hydrodynamic pressure on the magnetic axis is less than on the toroid surface. This "anti-confinement" configuration can be considered an equilibrium with an inverted beta profile and is relevant to interplanetary magnetic clouds as these clouds have lower hydrodynamic pressure in their interior than on their surface.

Bellan, Paul M

2015-01-01T23:59:59.000Z

166

High efficiency off-axis current drive by high frequency fast waves  

SciTech Connect (OSTI)

Modeling work shows that current drive can be done off-axis with high efficiency, as required for FNSF and DEMO, by using very high harmonic fast waves (helicons or whistlers). The modeling indicates that plasmas with high electron beta are needed in order for the current drive to take place off-axis, making DIII-D a highly suitable test vehicle for this process. The calculations show that the driven current is not very sensitive to the launched value of n{sub ?}, a result that can be understood from examination of the evolution of n{sub ?} as the waves propagate in the plasma. Because of this insensitivity, relatively large values (?3) of n{sub ?} can be launched, thereby avoiding some of the problems with mode conversion in the boundary found in some previous experiments. Use of a traveling wave antenna provides a very narrow n{sub ?} spectrum, which also helps avoid mode conversion.

Prater, R.; Pinsker, R. I.; Moeller, C. P. [General Atomics, PO Box 85608, San Diego, California 92186-5608 (United States); Porkolab, M.; Vdovin, V. [Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139 (United States)

2014-02-12T23:59:59.000Z

167

Contour Charts of SOFAR Speed and Axis Depth in the Pacific Ocean  

Science Journals Connector (OSTI)

Sound speeds calculated from the physical properties of sea water as measured at hydrographic stations were used to construct contour charts of SOFAR?speed and SOFAR?axis depth for the Pacific Ocean. Wilson's formula was used for the calculation of speed. Data were averaged for 1 squares plotted and smooth contours were drawn manually. Speeds averaged along great?circle paths are compared with those measured for explosions. The charts show steep gradients along the Antarctic convergence and at the convergence of the Oyashio and Kuroshio extension. The region of highest speed as well as greatest axis depth was that extending eastward from Australia to about the 150W. The charts are used in a program for calculating source coordinates of earthquakeT phases.

Rockne H. Johnson; Roger A. Norris

1967-01-01T23:59:59.000Z

168

Tracking formulas and strategies for a receiver oriented dual-axis tracking toroidal heliostat  

SciTech Connect (OSTI)

A 4 m x 4 m toroidal heliostat with receiver oriented dual-axis tracking, also called spinning-elevation tracking, was developed as an auxiliary heat source for a hydrogen production system. A series of spinning-elevation tracking formulas have been derived for this heliostat. This included basic tracking formulas, a formula for the elevation angle for heliostat with a mirror-pivot offset, and a more general formula for the biased elevation angle. This paper presents the new tracking formulas in detail and analyzes the accuracy of applying a simplifying approximation. The numerical results show these receiver oriented dual-axis tracking formula approximations are accurate to within 2.5 x 10{sup -6} m in image plane. Some practical tracking strategies are discussed briefly. Solar images from the toroidal heliostat at selected times are also presented. (author)

Guo, Minghuan; Wang, Zhifeng; Liang, Wenfeng; Zhang, Xiliang; Zang, Chuncheng [Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Institute of Electrical Engineering, Beijing 100190 (China); Lu, Zhenwu; Wei, Xiudong [Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS), Jilin 130033 (China)

2010-06-15T23:59:59.000Z

169

Floating axis wind turbines for offshore power generationa conceptual study  

Science Journals Connector (OSTI)

The cost of energy produced by offshore wind turbines is considered to be higher than land based ones because of the difficulties in construction, operation and maintenance on offshore sites. To solve the problem, we propose a concept of a wind turbine that is specially designed for an offshore environment. In the proposed concept, a floater of revolutionary shape supports the load of the wind turbine axis. The floater rotates with the turbine and the turbine axis tilts to balance the turbine thrust, buoyancy and gravity. The tilt angle is passively adjustable to wind force. The angle is 30 at rated power. The simplicity of the system leads to further cost reduction of offshore power generation.

Hiromichi Akimoto; Kenji Tanaka; Kiyoshi Uzawa

2011-01-01T23:59:59.000Z

170

The experimental and theoretical investigaton of a horizontal-axis wind turbine  

E-Print Network [OSTI]

. Chevalier An experimental and theoretical investigation of a horizontal-axis wind energy conversion device utilizing straight blades as the force- producing surfaces was conducted. The blades were mounted horizontally between two rotating discs and were... positioned with a mechanical cern system to produce the maximum torque at every point around the revolution. The wind turbine was tested in a 7 x 10 ft low speed wind tunnel. The device converted over 20 percent of the energy available in the wind...

Milburn, Robert Terrance

2012-06-07T23:59:59.000Z

171

Method and apparatus for maintaining equilibrium in a helical axis stellarator  

DOE Patents [OSTI]

Apparatus for maintaining three-dimensional MHD equilibrium in a plasma contained in a helical axis stellarator includes a resonant coil system, having a configuration such that current therethrough generates a magnetic field cancelling the resonant magnetic field produced by currents driven by the plasma pressure on any given flux surface resonating with the rotational transform of another flux surface in the plasma. Current through the resonant coil system is adjusted as a function of plasma beta.

Reiman, A.; Boozer, A.

1984-10-31T23:59:59.000Z

172

Method and apparatus for maintaining equilibrium in a helical axis stellarator  

DOE Patents [OSTI]

Apparatus for maintaining three-dimensional MHD equilibrium in a plasma contained in a helical axis stellerator includes a resonant coil system, having a configuration such that current therethrough generates a magnetic field cancelling the resonant magnetic field produced by currents driven by the plasma pressure on any given flux surface resonating with the rotational transform of another flux surface in the plasma. Current through the resonant coil system is adjusted as a function of plasma beta.

Reiman, Allan (Princeton, NJ); Boozer, Allen (Rocky Hill, NJ)

1987-01-01T23:59:59.000Z

173

mathematics single cycle  

E-Print Network [OSTI]

47 mathematics education single cycle master's study programme #12;48 single cycle master's study program in Mathematics Education #12;49 single cycle master's study program in Mathematics Education MATHEMATICS EDUCATION The program is in tune with the principles of the Bologna Declaration. · Academic title

?umer, Slobodan

174

Analyses of cracks in thick stiffened plates repaired with single-sided composite patch  

Science Journals Connector (OSTI)

Abstract This study investigated the effect of composite patches applied to thick stiffened plates with single-sided repairs. A simplified analytical model was derived to predict the reduction in the mode I strain energy release rates resulting from the single-sided composite patches. Finite element analyses were also conducted to compute the mode I strain energy release rates with and without composite patches, and their results were compared to the analytical model prediction. Furthermore, changes in the location of the neural axis with single-side patches were examined with their effects on the effectiveness of the patch repair with variations in both material and geometric parameters of the patch and plate. The neutral axis location in the patched plate played an important role to influence the effectiveness of the composite patch.

Y.W. Kwon; B.L. Hall

2015-01-01T23:59:59.000Z

175

Fabrication of single crystalline, uniaxial single domain Co nanowire arrays with high coercivity  

SciTech Connect (OSTI)

Whilst Co nanorods with high coercivity were synthesized during recent years, they did not achieve the same results as for Co nanowires embedded in solid templates. In the present work, Co nanowire arrays (NWAs) with high coercivity were successfully fabricated in porous aluminum oxide template under optimum conditions by using pulsed ac electrodeposition technique. Magnetic properties and crystalline characteristics of the nanowires were investigated by hysteresis loop measurements, first-order reversal curve (FORC) analysis, X-ray diffraction (XRD), and selected area electron diffraction (SAED) patterns. Hysteresis loop measurements showed high coercivity of about 4.8 kOe at room temperature together with optimum squareness of 1, resulting in an increase of the previous maximum coercivity for Co NWAs up to 45%. XRD and SAED patterns revealed a single crystalline texture along the [0002] direction, indicating the large magnetocrystalline anisotropy. On the other hand, FORC analysis confirmed a single domain structure for the Co NWAs. In addition, the reversal mechanism of the single crystalline, single domain Co NWAs was studied which resulted in the fixed easy axis with a coherent rotation. Accordingly, these nanowires might offer promising applications in high density bit patterned media and low power logic devices.

Ramazani, A., E-mail: rmzn@kashanu.ac.ir; Almasi Kashi, M. [Department of Physics, University of Kashan, Kashan 87317-51167 (Iran, Islamic Republic of); Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167 (Iran, Islamic Republic of); Montazer, A. H. [Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167 (Iran, Islamic Republic of)

2014-03-21T23:59:59.000Z

176

Measurement of the rotational transform at the axis of a tokamak  

Science Journals Connector (OSTI)

Measurements of the internal magnetic field structure of Texas Experimental Tokamak discharges are made by use of laser-induced fluorescence of an injected Li0 beam. From measurements near the magnetic axis, we obtain the axial safety factor, q0 (or equivalently the rotational transform, ?=2?/q) for various discharge conditions. In particular, for low-qa sawtoothing discharges, we find time-averaged values of q0 significantly less than 1 (?0.7 to 0.8), in contrast with models used to describe the nonlinear internal relaxation process commonly known as sawteeth.

W. P. West; D. M. Thomas; J. S. deGrassie; S. B. Zheng

1987-06-29T23:59:59.000Z

177

A Large Liquid Argon TPC for Off-axis NuMI Neutrino Physics  

SciTech Connect (OSTI)

The ICARUS collaboration has shown the power of the liquid argon time projection chamber (LArTPC) technique to image events with bubble-chamber-like quality. I will describe a proposed long-baseline {nu}e appearance experiment utilizing a large ({>=} 15 kton1) LArTPC placed off-axis of Fermilab's NuMI {nu}{mu} beam. The total LArTPC program as it presently stands, which includes a number of smaller R and D projects designed to examine the key design issues, will be outlined.

Menary, Scott [York University, Toronto (Canada)

2006-07-11T23:59:59.000Z

178

Solutions for Neutral for Axi-Dilaton Gravity in 4-Dimensions  

E-Print Network [OSTI]

We examine a 1 parameter class of actions describing the gravitational interaction between a pair of scalar fields and Einsteinian gravitation. When the parameter is positive the theory corresponds to an axi-dilatonic sector of low energy string theory. We exploit an SL(2,R) symmetry of the theory to construct a family of electromagnetically neutral solutions with non-zero axion and dilaton charge from solutions of the Brans-Dicke theory. We also comment on solutions to the theory with negative coupling parameter.

T Dereli; M Onder; Robin W Tucker

1995-02-08T23:59:59.000Z

179

Seismic reflection images of a near-axis melt sill within the lower crust at the Juan de Fuca ridge  

Science Journals Connector (OSTI)

... -axis seamounts with chemistry distinct from the axial lavas (Fig. 4a). Observations by submersible vehicles have also reported the presence of low-temperature hydrothermal venting ?3.3?km ... ratio is 0.25. Reflection coefficients

J. Pablo Canales; Mladen R. Nedimovi?; Graham M. Kent; Suzanne M. Carbotte; Robert S. Detrick

2009-07-02T23:59:59.000Z

180

Environmental and Performance Analysis of a 5kW Horizontal Axis Wind Turbine in East Central Alberta.  

E-Print Network [OSTI]

??This thesis investigates the environmental and performance results of a 5kW horizontal axis wind turbine installed in east-central Alberta. Life cycle assessment (LCA) methodology was (more)

Rooke, Braden

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Multi-axis compliant mechanism-based nanopositioner for multi-mode mechanical testing of carbon nanotubes  

E-Print Network [OSTI]

This thesis documents the design of a multi-axis nanopositioner that addresses a need for carbon nanotube (CNT) instrumentation that is capable of multiple modes of mechanical testing. This nanopositioner is a solution to ...

Lin, Kevin, S.M. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

182

Dynamics of a horizontal cylinder oscillating as a wave energy converter about an off-centred axis.  

E-Print Network [OSTI]

The hydrodynamic properties of a horizontal cylinder which is free to pitch about an off-centred axis are studied and used to derive the equations of motion of a wave energy converter which extracts energy from incoming ...

Lucas, Jorge

2011-11-22T23:59:59.000Z

183

Simultaneous two-axis vibration measurement of a nonmetallic cylinder by electromagnetic induction and metallic foil loops  

Science Journals Connector (OSTI)

This work presents a method based on electromagnetic induction for the simultaneous non-contact measurement of two-axis lateral vibrations of a nonmetallic cylinder. The suggested method ... pair of loop is induc...

Soon Woo Han; Jin Ki Kim; Yoon Young Kim

2011-08-01T23:59:59.000Z

184

Feed rate calculation algorithm for the homogeneous material deposition of blisk blades by 5-axis laser cladding  

Science Journals Connector (OSTI)

The application of laser cladding technology is becoming widely extended in the ... parts. These complex parts require 5-axis laser cladding deposition processes whose programming demands optimized and ... homoge...

Amaia Calleja; Ivn Tabernero

2014-10-01T23:59:59.000Z

185

A six-axis robotic sample changer for high-throughput neutron powder diffraction and texture measurements  

Science Journals Connector (OSTI)

A new six-axis robotic sample changer for neutron powder diffraction experiments, including texture measurements, has enabled a novel set of experiments to be performed at the High-Pressure Preferred Orientation diffractometer at the Lujan Neutron Scattering Center.

Losko, A.S.

2014-11-18T23:59:59.000Z

186

Latitudinal gradients of coniferous tree species, vegetation, and climate in the Sierran-Cascade axis of Northern California  

Science Journals Connector (OSTI)

Latitudinal gradients of tree species composition along the Sierran/Cascade axis in northern California were explored by comparing forests of Lassen Volcanic and Yosemite National Parks, USA. A calibration pro...

Albert J. Parker

1994-12-01T23:59:59.000Z

187

The influence of the nonverticality of the azimuthal rotation axis of the concentrator (heliostat) on program tracking accuracy  

Science Journals Connector (OSTI)

It is shown that the nonverticality of the azimuthal axis has a significant influence on the accuracy of the program control of the concentrator (heliostat). To eliminate this error, it is...

A. A. Abdurakhmanov; S. A. Orlov; A. S. Saribaev; Kh. K. Fazilov

2010-12-01T23:59:59.000Z

188

Three-dimensional Numerical Analysis on Blade Response of Vertical Axis Tidal Current Turbine Under Operational Condition  

SciTech Connect (OSTI)

Tidal power as a large-scale renewable source of energy has been receiving significant attention recently because of its advantages over the wind and other renewal energy sources. The technology used to harvest energy from tidal current is called a tidal current turbine. Though some of the principles of wind turbine design are applicable to tidal current turbines, the design of latter ones need additional considerations like cavitation damage, corrosion etc. for the long-term reliability of such turbines. Depending up on the orientation of axis, tidal current turbines can be classified as vertical axis turbines or horizontal axis turbines. Existing studies on the vertical axis tidal current turbine focus more on the hydrodynamic aspects of the turbine rather than the structural aspects. This paper summarizes our recent efforts to study the integrated hydrodynamic and structural aspects of the vertical axis tidal current turbines. After reviewing existing methods in modeling tidal current turbines, we developed a hybrid approach that combines discrete vortex method -finite element method that can simulate the integrated hydrodynamic and structural response of a vertical axis turbine. This hybrid method was initially employed to analyze a typical three-blade vertical axis turbine. The power coefficient was used to evaluate the hydrodynamic performance, and critical deflection was considered to evaluate the structural reliability. A sensitivity analysis was also conducted with various turbine height-to-radius ratios. The results indicate that both the power output and failure probability increase with the turbine height, suggesting a necessity for optimal design. An attempt to optimize a 3-blade vertical axis turbine design with hybrid method yielded a ratio of turbine height to radius (H/R) about 3.0 for reliable maximum power output.

Li, Ye; Karri, Naveen K.; Wang, Qi

2014-04-30T23:59:59.000Z

189

Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K. McLaren, S. Ziada  

E-Print Network [OSTI]

Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K Vertical axis wind turbines are currently experiencing a renewed interest in small- scale applications: vertical axis wind turbines, vibration, blade aerodynamics #12;Introduction In community wind power

Tullis, Stephen

190

A generalized on-line estimation and control of five-axis contouring errors of CNC machine tools  

Science Journals Connector (OSTI)

Abstract Nonlinear and configuration-dependent five-axis kinematics make contouring errors difficult to estimate and control in real time. This paper proposes a generalized method for the on-line estimation and control of five-axis contouring errors. First, a generalized Jacobian function is derived based on screw theory in order to synchronize the motions of linear and rotary drives. The contouring error components contributed by all active drives are estimated through interpolated position commands and the generalized Jacobian function. The estimated axis components of contouring errors are fed back to the position commands of each closed loop servo drive with a proportional gain. The proposed contouring error estimation and control methods are general, and applicable to arbitrary five-axis tool paths and any kinematically admissible five-axis machine tools. The proposed algorithms are verified experimentally on a five-axis machine controlled by a modular research CNC system built in-house. The contouring errors are shown to be reduced by half with the proposed method, which is simple to implement in existing CNC systems.

Jixiang Yang; Yusuf Altintas

2015-01-01T23:59:59.000Z

191

String dynamics and ejection along the axis of a spinning black hole  

Science Journals Connector (OSTI)

Relativistic current carrying strings moving axisymmetrically on the background of a Kerr black hole are studied. The boundaries and possible types of motion of a string with a given energy and current are found. Regions of parameters for which the string falls into the black hole, is trapped in a toroidal volume, or can escape to infinity, are identified, and representative trajectories are examined by numerical integration, illustrating various interesting behaviors. In particular, we find that a string can start out at rest near the equatorial plane and, after bouncing around, be ejected out along the axis, some of its internal (elastic or rotational kinetic) energy having been transformed into translational kinetic energy. The resulting velocity can be an order unity fraction of the speed of light. This process results from the presence of an outer tension barrier and an inner angular momentum barrier that are deformed by the gravitational field. We speculatively discuss the possible astrophysical significance of this mechanism as a means of launching a collimated jet of magnetohydrodynamics plasma flux tubes along the spin axis of a gravitating system fed by an accretion disk.

Ted Jacobson and Thomas P. Sotiriou

2009-03-26T23:59:59.000Z

192

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. part I: Aerodynamics  

Science Journals Connector (OSTI)

Abstract The need to further exploit offshore wind resources has pushed offshore wind farms into deeper waters, requiring the use of floating support structures to be economically sustainable. The use of conventional wind turbines may not continue to be the optimal design for floating applications. Therefore it is important to assess other alternative concepts in this context. Vertical axis wind turbines (VAWTs) are one promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess their technical feasibility. A comprehensive review detailing the areas of engineering expertise utilised in developing an understanding of the coupled dynamics of floating \\{VAWTs\\} has been developed through a series of articles. This first article details the aerodynamic modelling of VAWTs, providing a review of available models, discussing their applicability to floating \\{VAWTs\\} and current implementations by researchers in this field. A concise comparison between conventional horizontal axis wind turbines and \\{VAWTs\\} is also presented, outlining the advantages and disadvantages of these technologies for the floating wind industry. This article has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Andrew Shires; Maurizio Collu

2014-01-01T23:59:59.000Z

193

Single crystal Processing and magnetic properties of gadolinium nickel  

SciTech Connect (OSTI)

GdNi is a rare earth intermetallic material that exhibits very interesting magnetic properties. Spontaneous magnetostriction occurs in GdNi at T{sub C}, on the order of 8000ppm strain along the c-axis and only until very recently the mechanism causing this giant magnetostriction was not understood. In order to learn more about the electronic and magnetic structure of GdNi, single crystals are required for anisotropic magnetic property measurements. Single crystal processing is quite challenging for GdNi though since the rare-earth transition-metal composition yields a very reactive intermetallic compound. Many crystal growth methods are pursued in this study including crucible free methods, precipitation growths, and specially developed Bridgman crucibles. A plasma-sprayed Gd{sub 2}O{sub 3} W-backed Bridgman crucible was found to be the best means of GdNi single crystal processing. With a source of high-quality single crystals, many magnetization measurements were collected to reveal the magnetic structure of GdNi. Heat capacity and the magnetocaloric effect are also measured on a single crystal sample. The result is a thorough report on high quality single crystal processing and the magnetic properties of GdNi.

Shreve, Andrew John [Ames Laboratory

2012-11-02T23:59:59.000Z

194

Single-Molecule Chemistry  

Science Journals Connector (OSTI)

With the currently available optical facilities, it is now possible to observe the dynamic behavior of single biomolecules and to study their kinetics. Within a group of molecules (e.g., in an enzyme), ... static...

2008-01-01T23:59:59.000Z

195

Photoluminescence Polarization Anisotropy in a Single Heterostructured III-V Nanowire with Mixed Crystal Phases  

SciTech Connect (OSTI)

Low temperature (10 K) micro-photoluminescence ({mu}-PL) of single GaAs/AlGaAs core-shell nanowires with single GaAsSb inserts were measured. The PL emission from the zinc blende GaAsSb insert is strongly polarized along the nanowire axis while the PL emission from the wurtzite GaAs nanowire is perpendiculary polarized to the nanowire axis. The result indicates that the crystal phase, through the optical selection rules, has significant effect on the polarization of the PL from NWs besides the dielectric mismatch. The analysis of the PL results based on the electronic structure of these nanowires supports the correlation between the crystal phase and the PL emission.

Moses, A. F.; Hoang, T. B.; Ahtapodov, L.; Dheeraj, D. L.; Fimland, B. O.; Weman, H. [Department of Electronics and Telecommunications, Norwegian University of Science and Technology, NO - 7491 Trondheim (Norway); Helvoort, A. T. J. van [Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim (Norway)

2011-12-23T23:59:59.000Z

196

On-Axis Brilliance and Power of In-Vacuum Undulators for The Advanced Photon Source  

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

4 4 On-Axis Brilliance and Power of In-Vacuum Undulators for the Advanced Photon Source (formerly MD-TN-2009-004) R. Dejus, M. Jaski, and S.H. Kim - MD Group/ASD Rev. 1, November 25, 2009: Updated the fitted B eff in Tables 1 - 3, and 5 to use two decimals in the fitted equation. Explained chosen gaps. Added clarifications in the text and added additional references. Edited by C. Eyberger for release as cleared document ANL/APS/LS-314; updated in ICMS. Rev. 0a, June 17, 2009: ICMS Initial Release (minor clarifications and corrections of typographical errors, added footnote "d" to Table 4). Rev. 0, June 16, 2009: First Release as Technical Note MD-TN-2009-004. Table of Contents Introduction ......................................................................................................................... 2

197

Combined Experiment Phase 1. [Horizontal axis wind turbines: wind tunnel testing versus field testing  

SciTech Connect (OSTI)

How does wind tunnel airfoil data differ from the airfoil performance on an operating horizontal axis wind turbine (HAWT) The National Renewable Energy laboratory has been conducting a comprehensive test program focused on answering this question and understanding the basic fluid mechanics of rotating HAWT stall aerodynamics. The basic approach was to instrument a wind rotor, using an airfoil that was well documented by wind tunnel tests, and measure operating pressure distributions on the rotating blade. Based an the integrated values of the pressure data, airfoil performance coefficients were obtained, and comparisons were made between the rotating data and the wind tunnel data. Care was taken to the aerodynamic and geometric differences between the rotating and the wind tunnel models. This is the first of two reports describing the Combined Experiment Program and its results. This Phase I report covers background information such as test setup and instrumentation. It also includes wind tunnel test results and roughness testing.

Butterfield, C.P.; Musial, W.P.; Simms, D.A.

1992-10-01T23:59:59.000Z

198

The determination of stochastic loads on horizontal axis wind turbine blades  

SciTech Connect (OSTI)

The FAST Code which is capable of determining structural loads of a flexible, teetering, horizontal axis wind turbine is described and comparisons of calculated loads with test data are given at two wind speeds for the ESI-80. The FAST Code models a two-bladed HAWT with degrees-of-freedom for blade bending, teeter, drive train flexibility, yaw, and windwise and crosswind tower motion. The code allows blade dimensions, stiffnesses, and weights to differ and the code models tower shadow, wind shear, and turbulence. Additionally, dynamic stall is included as are delta-3 and an underslung rotor. Load comparisons are made with ESI-80 test data in the form of power spectral density, rainflow counting occurrence histograms, and azimuth averaged bin plots. It is concluded that agreement between the FAST Code and test results is good.

Freeman, L.N.; Wilson, R.E. [Oregon State Univ., Corvallis, OR (United States). Dept. of Mechanical Engineering

1998-05-01T23:59:59.000Z

199

Design of a Thermal Imaging Diagnostic Using 90-Degree, Off-Axis, Parabolic Mirrors  

SciTech Connect (OSTI)

Thermal imaging is an important, though challenging, diagnostic for shockwave experiments. Shock-compressed materials undergo transient temperature changes that cannot be recorded with standard (greater than ms response time) infrared detectors. A further complication arises when optical elements near the experiment are destroyed. We have designed a thermal-imaging system for studying shock temperatures produced inside a gas gun at Sandia National Laboratories. Inexpensive, diamond-turned, parabolic mirrors relay an image of the shocked target to the exterior of the gas gun chamber through a sapphire vacuum port. The 30005000-nm portion of this image is directed to an infrared camera which acquires a snapshot of the target with a minimum exposure time of 150 ns. A special mask is inserted at the last intermediate image plane, to provide dynamic thermal background recording during the event. Other wavelength bands of this image are split into high-speed detectors operating at 9001700 nm, and at 17003000 nm for timeresolved pyrometry measurements. This system incorporates 90-degree, off-axis parabolic mirrors, which can collect low f/# light over a broad spectral range, for high-speed imaging. Matched mirror pairs must be used so that aberrations cancel. To eliminate image plane tilt, proper tip-to-tip orientation of the parabolic mirrors is required. If one parabolic mirror is rotated 180 degrees about the optical axis connecting the pair of parabolic mirrors, the resulting image is tilted by 60 degrees. Different focal-length mirrors cannot be used to magnify the image without substantially sacrificing image quality. This paper analyzes performance and aberrations of this imaging diagnostic.

Malone, Robert M.; Becker, Steven A.; Dolan, Daniel H.; Hacking, Richard G.; Hickman, Randy J.; Kaufman, Morris I.; Stevens, Gerald D.; Turley, William D.

2006-09-01T23:59:59.000Z

200

Electron cyclotron resonance near the axis of the gas-dynamic trap  

SciTech Connect (OSTI)

Propagation of an extraordinary electromagnetic wave in the vicinity of electron cyclotron resonance surface in an open linear trap is studied analytically, taking into account inhomogeneity of the magnetic field in paraxial approximation. Ray trajectories are derived from a reduced dispersion equation that makes it possible to avoid the difficulty associated with a transition from large propagation angles to the case of strictly longitudinal propagation. Our approach is based on the theory, originally developed by Zvonkov and Timofeev [Sov. J. Plasma Phys. 14, 743 (1988)], who used the paraxial approximation for the magnetic field strength, but did not consider the slope of the magnetic field lines, which led to considerable error, as has been recently noted by Gospodchikov and Smolyakova [Plasma Phys. Rep. 37, 768-774 (2011)]. We have found ray trajectories in analytic form and demonstrated that the inhomogeneity of both the magnetic field strength and the field direction can qualitatively change the picture of wave propagation and significantly affect the efficiency of electron cyclotron heating of a plasma in a linear magnetic trap. Analysis of the ray trajectories has revealed a criterion for the resonance point on the axis of the trap to be an attractor for the ray trajectories. It is also shown that a family of ray trajectories can still reach the resonance point on the axis if the latter generally repels the ray trajectories. As an example, results of general theory are applied to the electron cyclotron resonance heating experiment which is under preparation on the gas dynamic trap in the Budker Institute of Nuclear Physics [Shalashov et al., Phys. Plasmas 19, 052503 (2012)].

Bagulov, D. S. [Novosibirsk State University, Pirogova Street 2, Novosibirsk (Russian Federation); Kotelnikov, I. A. [Novosibirsk State University, Pirogova Street 2, Novosibirsk (Russian Federation); Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences, Akademika Lavrentyeva Prospect 11, 630090 Novosibirsk (Russian Federation)

2012-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Precession of a single vortex line in superfluid B3  

Science Journals Connector (OSTI)

This paper reports the discovery of a new vortex phenomenon in superfluid B3. A single filament of quantized vortex line precesses as a solid body around a wire extending along the axis of a cylinder. The precession frequency equals the angular velocity of the apparatus at which the presence of a single quantum of circulation minimizes the systems free energy. The period of precession is related to the circulation quantum and the dimensions of the apparatus. Thus a measurement of the precession period is an accurate determination of the quantum unit. We find ?=(1.0200.03)h/2m3, where m3 is the mass of the He3 atom.

R. J. Zieve; Yu. Mukharsky; J. D. Close; J. C. Davis; R. E. Packard

1992-03-02T23:59:59.000Z

202

Determining the neutrino mass hierarchy and CP violation in NoVA with a second off-axis detector  

SciTech Connect (OSTI)

We consider a Super-NOVA-like experimental configuration based on the use of two detectors in a long-baseline experiment as NOVA. We take the far detector as in the present NOVA proposal and add a second detector at a shorter baseline. The location of the second off-axis detector is chosen such that the ratio L/E is the same for both detectors, being L the baseline and E the neutrino energy. We consider liquid argon and water- Cerenkov techniques for the second off-axis detector and study, for different experimental setups, the detector mass required for the determination of the neutrino mass hierarchy, for different values of {theta}{sub 13}. We also study the capabilities of such an experimental setup for determining CP-violation in the neutrino sector. Our results show that by adding a second off-axis detector a remarkable enhancement on the capabilities of the current NOVA experiment could be achieved.

Mena, Olga; /Fermilab; Palomares-Ruiz, Sergio; /Vanderbilt U.; Pascoli, Silvia; /CERN /Durham U., IPPP

2005-10-01T23:59:59.000Z

203

SINGLE CRYSTAL NEUTRON DIFFRACTION.  

SciTech Connect (OSTI)

Single-crystal neutron diffraction measures the elastic Bragg reflection intensities from crystals of a material, the structure of which is the subject of investigation. A single crystal is placed in a beam of neutrons produced at a nuclear reactor or at a proton accelerator-based spallation source. Single-crystal diffraction measurements are commonly made at thermal neutron beam energies, which correspond to neutron wavelengths in the neighborhood of 1 Angstrom. For high-resolution studies requiring shorter wavelengths (ca. 0.3-0.8 Angstroms), a pulsed spallation source or a high-temperature moderator (a ''hot source'') at a reactor may be used. When complex structures with large unit-cell repeats are under investigation, as is the case in structural biology, a cryogenic-temperature moderator (a ''cold source'') may be employed to obtain longer neutron wavelengths (ca. 4-10 Angstroms). A single-crystal neutron diffraction analysis will determine the crystal structure of the material, typically including its unit cell and space group, the positions of the atomic nuclei and their mean-square displacements, and relevant site occupancies. Because the neutron possesses a magnetic moment, the magnetic structure of the material can be determined as well, from the magnetic contribution to the Bragg intensities. This latter aspect falls beyond the scope of the present unit; for information on magnetic scattering of neutrons see Unit 14.3. Instruments for single-crystal diffraction (single-crystal diffractometers or SCDs) are generally available at the major neutron scattering center facilities. Beam time on many of these instruments is available through a proposal mechanism. A listing of neutron SCD instruments and their corresponding facility contacts is included in an appendix accompanying this unit.

KOETZLE,T.F.

2001-03-13T23:59:59.000Z

204

Single Particle Laser Ablation | EMSL  

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

Single Particle Laser Ablation Single Particle Laser Ablation Leads No leads are available at this time. Effect of Solar Radiation on the Optical Properties and Molecular...

205

Single-exciton nanocrystal laser  

DOE Patents [OSTI]

A laser system employing amplification via a single exciton regime and to optical gain media having single exciton amplification is provided.

Klimov, Victor I. (Los Alamos, NM); Ivanov, Sergei A. (Albuquerque, NM)

2012-01-17T23:59:59.000Z

206

Neutron scattering investigation of the magnetic order in single crystalline BaFe2As2  

SciTech Connect (OSTI)

The magnetic structure of BaFe{sub 2}As{sub 2} was determined from polycrystalline neutron diffraction measurements soon after the ThCr{sub 2}Si{sub 2}-type FeAs-based superconductors were discovered. Both the moment direction and the in-plane antiferromagnetic wavevector are along the longer a-axis of the orthorhombic unit cell. There is only one combined magnetostructural transition at {approx}140 K. However, a later single-crystal neutron diffraction work reported contradicting results. Here, we show neutron diffraction results from a single-crystal sample, grown by a self-flux method, that support the original polycrystalline work.

Bao, Wei [Los Alamos National Laboratory; Qiu, Y [NIST; Kofu, M [UNIV OF VA; Lee, S - H [UNIV OF VA; Chang, S [NIST; Wu, T [HEFEI NAT. LAB.; Wu, G [HEFEI NAT. LAB; Chen, X H [HEFEI NAT. LAB

2008-01-01T23:59:59.000Z

207

Direct synthesis and easy axis alignment of L1{sub 0}-FePt nanoparticles  

SciTech Connect (OSTI)

Partially ordered Fe{sub 53}Pt{sub 47} nanoparticles with size around 8 nm were prepared by the simultaneous decomposition of iron pentacarbonyl and platinum acetylacetonate. The high boiling point chemical, hexadecylamine, was used as a solvent, and 1-adamantanecarboxylic acid was used as a stabilizer. The reflux temperature of the solution could exceed 360 deg. C, where disordered FePt particles could be partially transformed into the ordered L1{sub 0} phase. A nonmagnetic mechanical stirrer was used in order to avoid agglomeration of the fct-FePt particles during synthesis. The particles were dispersed in toluene and films of the particles were cast onto silicon wafers from the solution. X-ray diffraction patterns of as-made samples showed weak superlattice peaks, indicating partial chemical ordering of the Fe{sub 53}Pt{sub 47} particles. The room-temperature hysteresis loop of the as-made sample reveals a small coercivity ({approx}600 Oe) because of thermal fluctuations; however, the loop is wide open and hard to saturate. The remanence coercivity from the dcd curve is about 2.5 kOe, which is four times larger than the hysteresis coercivity. The large remanent to hysteresis coercivity ratio and the shapes of the hysteresis loop and dcd curve suggest a broad distribution of anisotropies in the partially ordered particles. By coating the ordered nanoparticles with a polymer binder, the easy axis of the particles could be aligned under an external field.

Kang Shishou; Jia Zhiyong; Shi Shifan; Nikles, David E.; Harrell, J.W. [Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)

2005-05-15T23:59:59.000Z

208

A study of the abundance distributions along the minor axis of the Galactic bulge  

Science Journals Connector (OSTI)

I report the preliminary results of a project in collaboration with R. Michael Rich (Columbia) where we derive heavy element abundances for hundreds of K?giants in seven windows of low extinction along or near the minor axis of the Galactic bulge. By using the recently?calibrated Washington photometric filter system the distribution function in [Fe/H] is determined for each field. Within 8 of the Galactic center (?1 kpc) our data are consistent with no gradient in the distribution of [Fe/H] which may hint to a dissipationless collapse and/or sufficient mixing during the star?forming epoch when Fe was produced in the bulge. The mean abundance over this region is between two and five times solar. The form of these distributions is well?fitted by the simple (closed box) model of chemical evolution where the bulge is self?enriched by processing its original gas content to completion. Beyond 8 from the Galactic center our data show that the mean of the abundance distributions drops precipitously. This is consistent with the notion that the inner bulge is chemically distinct from the halo. It may be possible to use kinematics to disentangle the two populations via a radial velocity survey.

Neil D. Tyson

1992-01-01T23:59:59.000Z

209

Horizontal-axis wind-system rotor performance model comparison: a compendium  

SciTech Connect (OSTI)

This compendium consists of four reports, the purpose of which is to evaluate performance prediction methods for horizontal-axis wind turbines. The reports were prepared by four separate contractors. Oregon State University, AeroVironment, Inc., Aerospace Systems, Inc., and United Technologies Research Center (UTRC). Three of the four contractors used a blade-element/momentum analysis, while the fourth (UTRC) utilized a lifting line/prescribed wake analysis. These contractors were to apply their prediction methods to two rotors, that of the Enertech 1500 and that of the 1/3-scale UTRC 8 kW turbines. Results from the four prediction methods are compared with actual test data gathered via Controlled Velocity Testing (CVT), carried out by the Rocky Flats Wind Energy Research Center, operated by Rockwell International for the US Department of Energy. The conclusions of the four reports are reviewed in an introduction prepared by Rockwell International. For the Enertech 1500, rotor performance predictions closely agreed with CVT data. Yet, because of the lack of high tip speed ratio data, verification of the Glauert momentum theory was not possible. Predictions regarding the UTRC 1/3 scale 8 kW rotor did not agree well with test results. The reasons cited for the discrepancies center on inadequate airfoil section data and the varying blade pitch angles of the unique UTRC flexbeam rotor.

Not Available

1983-02-01T23:59:59.000Z

210

A numerical method for calculation of power output from ducted vertical axis hydro-current turbines  

Science Journals Connector (OSTI)

Abstract This paper investigates effects of ducting on power output from vertical axis hydro-current turbines. A numerical two-dimensional method based on the potential flow theory is developed for calculation of non-dimensional power output from these turbines. In this method, the blades are represented by vortex filaments. The vortex shedding from the blades is modeled by discrete vortices. A boundary element method is used to incorporate the duct shape which is represented by a series of panels with constant distributions of sources and doublets. The aerodynamic loading on the blades are calculated using a quasi-steady modeling. A time-marching scheme is used for implementation of the numerical method. The results of this method are compared with experimental results for a turbine model. A good correlation between the numerical and experimental results is obtained for tip speed ratios equal and higher than 2.25. However due to a lack of dynamic stall modeling, the numerical method is not able to predict power output accurately at lower tip speed ratios wherein effects of dynamic stall are significant. Both numerical and experimental results also showed that the power output from a turbine can increase significantly when it is enclosed within a well-designed duct. The maximum power output of the turbine model investigated in this paper showed a 74% increase when the turbine is operating within the duct relative to the case it is in free-stream conditions.

Mahmoud Alidadi; Sander Calisal

2014-01-01T23:59:59.000Z

211

Evaluation of servo, geometric and dynamic error sources on five axis high-speed machine tool  

E-Print Network [OSTI]

Many sources of errors exist in the manufacturing process of complex shapes. Some approximations occur at each step from the design geometry to the machined part. The aim of the paper is to present a method to evaluate the effect of high speed and high dynamic load on volumetric errors at the tool center point. The interpolator output signals and the machine encoder signals are recorded and compared to evaluate the contouring errors resulting from each axis follow-up error. The machine encoder signals are also compared to the actual tool center point position as recorded with a non-contact measuring instrument called CapBall to evaluate the total geometric errors. The novelty of the work lies in the method that is proposed to decompose the geometric errors in two categories: the quasi-static geometric errors independent from the speed of the trajectory and the dynamic geometric errors, dependent on the programmed feed rate and resulting from the machine structure deflection during the acceleration of its axes...

Andolfatto, Loc; Mayer, Ren

2011-01-01T23:59:59.000Z

212

Darrieus vertical axis wind turbine for power generation I: Assessment of Darrieus VAWT configurations  

Science Journals Connector (OSTI)

Abstract This paper aims to assess the Darrieus vertical axis wind turbine (VAWT) configurations, including the drawbacks of each variation that hindered the development into large scale rotor. A comprehensive timeline is given as a lineage chart. The variations are assessed on the performance, components and operational reliability. In addition, current development and future prospects of Darrieus VAWT are presented. The Darrieus VAWT patented in France in 1925 and in the US in 1931 had two configurations: (i) curved blades and (ii) straight blades configurations. Curved blades configuration (egg-beater or phi-rotor) has evolved from the conventional guy-wires support into fixed-on-tower and cantilevered versions. Straight blades configuration used to have variable-geometry (Musgrove-rotor), variable-pitch (Giromill), Diamond, Delta and V/Y rotor variations. They were stopped due to low economical value, i.e. high specific cost of energy (COE). Musgrove-rotor has evolved into fixed-pitch straight-bladed H-rotor (referred as H-rotor in this paper for simplicity). H-rotor, in turn, has evolved into several variations: Articulating, Tilted and Helical H-rotors.

Willy Tjiu; Tjukup Marnoto; Sohif Mat; Mohd Hafidz Ruslan; Kamaruzzaman Sopian

2015-01-01T23:59:59.000Z

213

Experimental research on tidal current vertical axis turbine with variable-pitch blades  

Science Journals Connector (OSTI)

Abstract Due to the limited storage and ever-increasing dependence on fossil fuel, the world is in the phase of shifting toward renewable energy. Tidal current energy is one of the most predictable forms of renewable energy, which is harnessed by utilizing a tidal current turbine. To study the performance of the tidal current turbine relating to the ability of energy absorption and exchanging, experimental tests play an important role which can not only validate the numerical results but also provide a reference for the prototype design. In this study, a series of experiments related to vertical-axis turbines (VAT) were carried out at Harbin Engineering University and a large quantity of experimental data to study the hydrodynamic performance of turbines was presented. Based on the different techniques used to control the pitch mechanism, the experiments can be classified as the cycloid type controllable-pitch, spring-control pitch and passive variable-pitch VAT experiment. The influences of the different parameters on the hydrodynamic performance of turbines were discussed. Finally, some control strategies for the blade for different turbines were given.

Fengmei Jing; Qihu Sheng; Liang Zhang

2014-01-01T23:59:59.000Z

214

Applying micro scales of horizontal axis wind turbines for operation in low wind speed regions  

Science Journals Connector (OSTI)

Abstract Utilizing the micro scales of wind turbines could noticeably supply the demand for the electricity in low wind speed regions. Aerodynamic design and optimization of the blade, as a main part of a wind turbine, were addressed in the study. Three micro scales of horizontal axis wind turbines with output power of 0.5, 0.75 and 1kW were considered and the geometric optimization of the blades in terms of the two involved parameters, chord and twist, was undertaken. In order to improve the performance of the turbines at low wind speeds, starting time was included in an objective function in addition to the output power the main and desirable goal of the wind turbine blade design. A purpose-built genetic algorithm was employed to maximize both the output power and the starting performance which were calculated by the blade-element momentum theory. The results emphasize that the larger values of the chord and twist at the root part of the blades are indispensable for the better performance when the wind speed is low. However, the noticeable value of the generator resistive torque could largely delay the starting of the micro-turbines especially for the considered smaller size, 0.5kW, where the starting aerodynamic torque could not overcome the generator resistive torque. For that size, an increase in the number of blades improved both the starting performance and also output power.

Abolfazl Pourrajabian; Reza Ebrahimi; Masoud Mirzaei

2014-01-01T23:59:59.000Z

215

Turbulence effects on the wake flow and power production of a horizontal-axis wind turbine  

Science Journals Connector (OSTI)

Abstract This study experimentally investigated the effects of ambient turbulence on the wake flows and power production of a horizontal-axis wind turbine. The approaching flows included low-turbulence smooth flow and grid-generated turbulent flow. The profiles of time-averaged velocity, turbulence intensity and Reynolds stress from the intermediate to the far-wake regions were measured and compared for smooth and turbulent flows. Based on the measured data, prediction models for the centerline velocity deficit, turbulence intensity, wake radius and velocity profile were proposed. In addition, the experimental results showed that the power productions in the grid-generated turbulent flows were slightly higher than that in the smooth flow. But the power loss due to the velocity deficit in the wake flow was larger than 50% when the downwind distance was less than 12D (D is the rotor diameter). An empirical relation between the power production and the downwind distance x and lateral distance y was proposed.

Chia-Ren Chu; Pei-Hung Chiang

2014-01-01T23:59:59.000Z

216

Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind  

E-Print Network [OSTI]

Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical constraint limits the amount of power that can be extracted from a given wind farm footprint. The resulting-axis wind turbines (VAWTs) in order to achieve higher power output per unit land area than existing wind

Dabiri, John O.

217

Possibility of c-axis voltage steps for a cuprate superconductor in a resonant cavity I. Tornes* and D. Stroud  

E-Print Network [OSTI]

, when driven by currents parallel to the c axis, behave like stacks of underdamped Josephson junctions's in stacks of artificial Josephson junctions. We conclude that such steps might be observable with a suitably, 74.25.Nf I. INTRODUCTION Barbara et al.1 have recently shown that underdamped Josephson-junction

Stroud, David

218

First Light of the 1.6 meter off-axis New Solar Telescope at Big Bear Solar Observatory  

E-Print Network [OSTI]

First Light of the 1.6 meter off-axis New Solar Telescope at Big Bear Solar Observatory Wenda Caoab, Nicolas Gorceixb, Roy Coulterb, Aaron Coulterb, Philip R. Goodeab aCenter for Solar-Terrestrial Research, New Jersey Institute of Technology, 323 Martin Luther King Blvd., Newark, NJ 07102; bBig Bear Solar

219

Thematic Week: The Role of Market Instruments in Integrated Water Management Thematic Axis: 7. Water Economics and Financing  

E-Print Network [OSTI]

Thematic Week: The Role of Market Instruments in Integrated Water Management Thematic Axis: 7. Water Economics and Financing Title: Beyond Water Marketing Myths Author: Griffin, Ronald C. Department://ron-griffin.tamu.edu, 979-845-7049. Summary: The challenge in isolating the opportunities and pitfalls of water marketing

Griffin, Ronald

220

User's manual for the vertical axis wind turbine performance computer code darter  

SciTech Connect (OSTI)

The computer code DARTER (DARrieus, Turbine, Elemental Reynolds number) is an aerodynamic performance/loads prediction scheme based upon the conservation of momentum principle. It is the latest evolution in a sequence which began with a model developed by Templin of NRC, Canada and progressed through the Sandia National Laboratories-developed SIMOSS (SSImple MOmentum, Single Streamtube) and DART (SARrieus Turbine) to DARTER.

Klimas, P. C.; French, R. E.

1980-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Single rotor turbine engine  

DOE Patents [OSTI]

There has been invented a turbine engine with a single rotor which cools the engine, functions as a radial compressor, pushes air through the engine to the ignition point, and acts as an axial turbine for powering the compressor. The invention engine is designed to use a simple scheme of conventional passage shapes to provide both a radial and axial flow pattern through the single rotor, thereby allowing the radial intake air flow to cool the turbine blades and turbine exhaust gases in an axial flow to be used for energy transfer. In an alternative embodiment, an electric generator is incorporated in the engine to specifically adapt the invention for power generation. Magnets are embedded in the exhaust face of the single rotor proximate to a ring of stationary magnetic cores with windings to provide for the generation of electricity. In this alternative embodiment, the turbine is a radial inflow turbine rather than an axial turbine as used in the first embodiment. Radial inflow passages of conventional design are interleaved with radial compressor passages to allow the intake air to cool the turbine blades.

Platts, David A. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

222

ATCA/AXIe compatible board for fast control and data acquisition in nuclear fusion experiments  

Science Journals Connector (OSTI)

An in-house development of an Advanced Telecommunications Computing Architecture (ATCA) board for fast control and data acquisition, with Input/Output (IO) processing capability, is presented. The architecture, compatible with the ATCA (PICMG 3.4) and ATCA eXtensions for Instrumentation (AXIe) specifications, comprises a passive Rear Transition Module (RTM) for IO connectivity to ease hot-swap maintenance and simultaneously to increase cabling life cycle. The board complies with ITER Fast Plant System Controller (FPSC) guidelines for rear IO connectivity and redundancy, in order to provide high levels of reliability and availability to the control and data acquisition systems of nuclear fusion devices with long duration plasma discharges. Simultaneously digitized data from all Analog to Digital Converters (ADC) of the board can be filtered/decimated in a Field Programmable Gate Array (FPGA), decreasing data throughput, increasing resolution, and sent through Peripheral Component Interconnect (PCI) Express to multi-core processors in the ATCA shelf hub slots. Concurrently the multi-core processors can update the board Digital to Analog Converters (DAC) in real-time. Full-duplex point-to-point communication links between all FPGAs, of peer boards inside the shelf, allow the implementation of distributed algorithms and Multi-Input Multi-Output (MIMO) systems. Support for several timing and synchronization solutions is also provided. Some key features are onboard ADC or DAC modules with galvanic isolation, Xilinx Virtex 6 FPGA, standard Dual Data Rate (DDR) 3 SODIMM memory, standard CompactFLASH memory card, Intelligent Platform Management Controller (IPMC), two PCI Express x4 (generation 2) ATCA Fabric channels (dual-star topology), eleven Xilinx Aurora x1 (or other ATCA compatible communications protocol) ATCA fabric channels (full-mesh topology) and two Fast Ethernet (Precision Time Protocol PTP IEEE1588-V2 and Lan eXtensions for Instrumentation LXI compatible) ATCA base channels (dual-star topology).

A.J.N. Batista; C. Leong; V. Bexiga; A.P. Rodrigues; A. Combo; B.B. Carvalho; J. Fortunato; M. Correia; J.P. Teixeira; I.C. Teixeira; J. Sousa; B. Gonalves; C.A.F. Varandas

2012-01-01T23:59:59.000Z

223

Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade  

SciTech Connect (OSTI)

This paper describes the structural design of a tidal composite blade. The structural design is preceded by two steps: hydrodynamic design and determination of extreme loads. The hydrodynamic design provides the chord and twist distributions along the blade length that result in optimal performance of the tidal turbine over its lifetime. The extreme loads, i.e. the extreme flap and edgewise loads that the blade would likely encounter over its lifetime, are associated with extreme tidal flow conditions and are obtained using a computational fluid dynamics (CFD) software. Given the blade external shape and the extreme loads, we use a laminate-theory-based structural design to determine the optimal layout of composite laminas such that the ultimate-strength and buckling-resistance criteria are satisfied at all points in the blade. The structural design approach allows for arbitrary specification of the chord, twist, and airfoil geometry along the blade and an arbitrary number of shear webs. In addition, certain fabrication criteria are imposed, for example, each composite laminate must be an integral multiple of its constituent ply thickness. In the present effort, the structural design uses only static extreme loads; dynamic-loads-based fatigue design will be addressed in the future. Following the blade design, we compute the distributed structural properties, i.e. flap stiffness, edgewise stiffness, torsion stiffness, mass, moments of inertia, elastic-axis offset, and center-of-mass offset along the blade. Such properties are required by hydro-elastic codes to model the tidal current turbine and to perform modal, stability, loads, and response analyses.

Bir, G. S.; Lawson, M. J.; Li, Y.

2011-10-01T23:59:59.000Z

224

Experimental verification of a model describing the intensity distribution from a single mode optical fiber  

SciTech Connect (OSTI)

The intensity distribution of a transmission from a single mode optical fiber is often approximated using a Gaussian-shaped curve. While this approximation is useful for some applications such as fiber alignment, it does not accurately describe transmission behavior off the axis of propagation. In this paper, another model is presented, which describes the intensity distribution of the transmission from a single mode optical fiber. A simple experimental setup is used to verify the model's accuracy, and agreement between model and experiment is established both on and off the axis of propagation. Displacement sensor designs based on the extrinsic optical lever architecture are presented. The behavior of the transmission off the axis of propagation dictates the performance of sensor architectures where large lateral offsets (25-1500 {micro}m) exist between transmitting and receiving fibers. The practical implications of modeling accuracy over this lateral offset region are discussed as they relate to the development of high-performance intensity modulated optical displacement sensors. In particular, the sensitivity, linearity, resolution, and displacement range of a sensor are functions of the relative positioning of the sensor's transmitting and receiving fibers. Sensor architectures with high combinations of sensitivity and displacement range are discussed. It is concluded that the utility of the accurate model is in its predicative capability and that this research could lead to an improved methodology for high-performance sensor design.

Moro, Erik A [Los Alamos National Laboratory; Puckett, Anthony D [Los Alamos National Laboratory; Todd, Michael D [UCSD

2011-01-24T23:59:59.000Z

225

Computer subroutine for estimating aerodynamic blade loads on Darrieus vertical axis wind turbines. [FORCE code  

SciTech Connect (OSTI)

An important aspect of structural design of the Darrieus rotor is the determination of aerodynamic blade loads. This report describes a load generator which has been used at Sandia for quasi-static and dynamic rotor analyses. The generator is based on the single streamtube aerodynamic flow model and is constructed as a FORTRAN IV subroutine to facilitate its use in finite element structural models. Input and output characteristics of the subroutine are described and a complete listing is attached as an appendix.

Sullivan, W. N.; Leonard, T. M.

1980-11-01T23:59:59.000Z

226

Single-Walle 4. Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

applications, carbon nanotube research is ac- tively being pursued in diverse areas including energy storage105 Single-Walle 4. Single-Walled Carbon Nanotubes Sebastien Nanot, Nicholas A. Thompson, Ji Single-walled carbon nanotubes (SWCNTs) are hol- low, long cylinders with extremely large aspect ratios

Kono, Junichiro

227

Anisotropy of Laser-Induced Bulk Damage of Single Crystals  

E-Print Network [OSTI]

The regularities of laser-induced damage of anisotropic materials, such as LiNbO3 and KDP dielectric single crystals, are experimentally studied. It is revealed that the shape of laser-induced damage in the dielectric crystals depends on the elastic symmetry of crystal and the propagation direction of the laser beam. When the beam propagates along the optic axis of crystals, the figures of the laser damage are six-path stars for LiNbO3 and four-path ones for KDP crystals. For the direction parallel to X and Y axes in KDP crystal, the damage has initially cross-like configuration, with further splitting of Z-oriented crack into two cracks in the process of damage evolution, leading to transformation of orthogonal-type damage to a hexagonal-type one.

Krupych, O; Smaga, I; Vlokh, R

2005-01-01T23:59:59.000Z

228

Acoustic studies of single?crystal high?temperature superconductors  

Science Journals Connector (OSTI)

The acoustic properties of single crystals of the high?temperature superconductor YBa 2 Cu 3 O 7 have been measured at temperatures between 0.1 and 300 K for frequencies near 103 and 109 Hz. In the GHz regime longitudinal modes have been studied for propagation directions parallel and perpendicular to the c axis. At Tc there is a discontinuity in the soundvelocities and their temperature derivatives from which the anisotropic strain dependences of Tc are obtained. In the kHz regime resonant excitation of flexural modes in thin reeds of YBa 2 Cu 3 O 7 crystals has permitted precise measurement of acoustic damping and dispersion. The temperature?dependent damping is characterized by at least five features associated with the relaxation of defects. At temperatures below 1 K the velocity of sound is consistent with the presence of a broad glasslike distribution of tunneling modes.

Brage Golding; W. H. Haemmerle; L. F. Schneemeyer

1988-01-01T23:59:59.000Z

229

Single molecule fluorescence (the basics)  

E-Print Network [OSTI]

Single molecule fluorescence (the basics) #12;light time light time No averaging, no need;knrkr S0 S1 Iph . . Iexc #12;Single molecule emitters #12;K. Brejc et.al., PNAS 94 (1997) 2306 1 nm glass, notch holographic, multidielectric,... #12;Optical schemes to detect single molecules Excitation

Ritort, Felix

230

Single-Nucleon Densities  

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

Densities Densities This web page presents single-nucleon densities calculated for a variety of nuclei in the range A=2-10 with some preliminary results for A=11,12. These are from variational Monte Carlo calculations (VMC) using the Argonne v18 two-nucleon and Urbana X three-nucleon potentials (AV18+UX). (Urbana X is intermediate between the Urbana IX and Illinois-7 models; it has the form of UIX supplemented with a two-pion S-wave piece, while the strengths of its terms are taken from the IL7 model. It does NOT have the three-pion-ring term of IL7.) These VMC wave functions are the starting trial functions for a number of recent Green's function Monte Carlo (GFMC) calculations: Brida, et al., Phys. Rev. C 84, 024319 (2011); McCutchan, et al., Phys. Rev. C 86, 024315 (2012);

231

Single-Column Modeling  

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

C.J. Somerville and S. F. lacobellis C.J. Somerville and S. F. lacobellis Climate Research Division Scripps Institution of Oceanography University of California, San Diego La Jolla, CA 92093-0224 Our project is centered around a computationally efficient and economical one-dimensional (vertical) model, resembling a single column of a general circulation model (GCM) grid, applied to the experimental site of the Atmospheric Radiation Measurement (ARM) Program. The model contains a full set of modern GCM parameterizations of subgrid physical processes. To force the model, the advective terms in the budget equations are specified observationally from operational numerical weather prediction analyses. These analyses, based on four-dimensional data assimilation techniques, provide dynamically consistent wind fields and horizontal gradients

232

Single molecule laser spectroscopy  

Science Journals Connector (OSTI)

Abstract In this article, we discussed some single molecule spectroscopy techniques and methods. We have chosen the simplicity in this survey based on our laboratory experience in this field. We concentrated on the imaging by both techniques the wide field and the scanning microscopes. Other imaging enhancements on the technique like extended resolution wide field, the total internal reflection imaging, and its derivatives are also reviewed. In addition to the imaging techniques, some diffusion techniques also are discussed like fluorescence correlation spectroscopy. The related methods like Forester resonance transfer, photo-induced electron transfer and anisotropy (steady state and time decay) are also discussed. In addition, we elucidated some simple details about the theory behind the FCS and its resulting curve fitting. This review is preceded by general introduction and ended with the conclusion.

Diaa Atta; Ali Okasha

2015-01-01T23:59:59.000Z

233

Quality Enhancement and Nerve Fibre Layer Artefacts Removal in Retina Fundus Images by Off Axis Imaging  

SciTech Connect (OSTI)

Retinal fundus images acquired with non-mydriatic digital fundus cameras are a versatile tool for the diagnosis of various retinal diseases. Because of the ease of use of newer camera models and their relative low cost, these cameras are employed worldwide by retina specialists to diagnose diabetic retinopathy and other degenerative diseases. Even with relative ease of use, the images produced by these systems sometimes suffer from reflectance artefacts mainly due to the nerve fibre layer (NFL) or other camera lens related reflections. We propose a technique that employs multiple fundus images acquired from the same patient to obtain a single higher quality image without these reflectance artefacts. The removal of bright artefacts, and particularly of NFL reflectance, can have great benefits for the reduction of false positives in the detection of retinal lesions such as exudate, drusens and cotton wool spots by automatic systems or manual inspection. If enough redundant information is provided by the multiple images, this technique also compensates for a suboptimal illumination. The fundus images are acquired in straightforward but unorthodox manner, i.e. the stare point of the patient is changed between each shot but the camera is kept fixed. Between each shot, the apparent shape and position of all the retinal structures that do not exhibit isotropic reflectance (e.g. bright artefacts) change. This physical effect is exploited by our algorithm in order to extract the pixels belonging to the inner layers of the retina, hence obtaining a single artefacts-free image.

Giancardo, Luca [ORNL] [ORNL; Meriaudeau, Fabrice [ORNL] [ORNL; Karnowski, Thomas Paul [ORNL] [ORNL; Li, Yaquin [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Tobin Jr, Kenneth William [ORNL] [ORNL; Chaum, Edward [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

234

Single-Photon Spectroscopy of a Single Molecule  

Science Journals Connector (OSTI)

Efficient interaction of light and matter at the ultimate limit of single photons and single emitters is of great interest from a fundamental point of view and for emerging applications in quantum engineering. However, the difficulty of generating single-photon streams with specific wavelengths, bandwidths, and power as well as the weak interaction probability of a single photon with an optical emitter pose a formidable challenge toward this goal. Here, we demonstrate a general approach based on the creation of single photons from a single emitter and their use for performing spectroscopy on a second emitter situated at a distance. While this first proof of principle realization uses organic molecules as emitters, the scheme is readily extendable to quantum dots and color centers. Our work ushers in a new line of experiments that provide access to the coherent and nonlinear couplings of few emitters and few propagating photons.

Y. L. A. Rezus; S. G. Walt; R. Lettow; A. Renn; G. Zumofen; S. Gtzinger; V. Sandoghdar

2012-02-27T23:59:59.000Z

235

Method and device for determining the position of a cutting tool relative to the rotational axis of a spindle-mounted workpiece  

DOE Patents [OSTI]

The present invention is directed to a method and device for determining the location of a cutting tool with respect to the rotational axis of a spindle-mounted workpiece. A vacuum cup supporting a machinable sacrificial pin is secured to the workpiece at a location where the pin will project along and encompass the rotational axis of the workpiece. The pin is then machined into a cylinder. The position of the surface of the cutting tool contacting the machine cylinder is spaced from the rotational axis of the workpiece a distance equal to the radius of the cylinder.

Williams, R.R.

1980-09-03T23:59:59.000Z

236

Approach to the fatigue analysis of vertical-axis wind-turbine blades  

SciTech Connect (OSTI)

A cursory analysis of the stress history of wind turbine blades indicates that a single stress level at each wind speed does not adequately describe the blade stress history. A statistical description is required. Blade stress data collected from the DOE/ALCOA Low Cost experimental turbines indicate that the Rayleigh probability density function adequately describes the distribution of vibratory stresses at each wind speed. The Rayleigh probability density function allows the distribution of vibratory stresses to be described by the RMS of the stress vs. time signal. With the RMS stress level described for all wind speeds, the complete stress history of the turbine blades is known. Miner's linear cumulative damage rule is used as a basis for summing the fatigue damage over all operating conditions. An analytical expression is derived to predict blade fatigue life.

Veers, P.S.

1981-09-01T23:59:59.000Z

237

Novel Cell based on Reduced Single-phase Active Front End for Multicell Converters.  

E-Print Network [OSTI]

V] and power of several Megawatts. Among different topologies [1], the cascaded Multicell [2] inverter has converters are a very interesting al- ternative for medium and high power drives. One of the more flexible topologies of this type is the Multicell con- verter. This paper presents a new regenerative cell suitable

Duffy, Ken

238

Single-Molecule Studies of Gene Expression  

E-Print Network [OSTI]

material for the single-molecule transcription experimentsGeometry for the single-molecule assay of bare DNAgeometry for the single-molecule translation assay .

Hodges, Hamilton Courtney

2009-01-01T23:59:59.000Z

239

Fluorescence, Single-Molecule Microscope | EMSL  

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

Single-Molecule Microscope Fluorescence, Single-Molecule Microscope The single-molecule optical microscope is designed to study complex reaction dynamics such as enzymatic...

240

Nanometer Resolution Imaging by SIngle Molecule Switching. |...  

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

Nanometer Resolution Imaging by SIngle Molecule Switching. Nanometer Resolution Imaging by SIngle Molecule Switching. Abstract: The fluorescence intensity of single molecules can...

Note: This page contains sample records for the topic "megawatt single axis" 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

High Throughput Single Molecule Investigation of Transcription  

E-Print Network [OSTI]

genomic DNA based on single-molecule detection. Analyticalmapping: a novel, single- molecule approach to genomic2011). High-throughput single-molecule optofluidic analysis.

Kim, Soohong

2012-01-01T23:59:59.000Z

242

Single Top production at LHC  

E-Print Network [OSTI]

The Production of single top quarks at LHC provides an ideal framework to investigate the properties of electroweak interaction, in particular of the {\\it tWb} coupling. Moreover, single top is a powerful mean to identify physics beyond the standard model. All three different production mechanisms of single top are expected to be observed at LHC. Recent studies from ATLAS and CMS are presented.

M. Mohammadi Najafabadi

2006-05-12T23:59:59.000Z

243

Prenatal Food Restriction Induces a Hypothalamic-Pituitary-Adrenocortical Axis-associated Neuroendocrine Metabolic Programmed Alteration in Adult Offspring Rats  

Science Journals Connector (OSTI)

Background and Aims Intrauterine growth restriction produces susceptibility to adult metabolic syndrome, which may be caused by the permanent alteration of the hypothalamic-pituitary-adrenocortical (HPA) axis. We aimed to verify that HPA axis-associated neuroendocrine metabolic programming is altered in food-restricted (FR) offspring. Methods Maternal rats were fed a restricted diet from gestational day 11 until full-term delivery, all pups were fed a high-fat diet after weaning and exposed to unpredictable chronic stress (UCS) during postnatal weeks 1720. Results Serum levels of adrenocorticotrophic hormone and corticosterone in adult offspring of the prenatal FR group were lower than the control (CN) rats before UCS but increased significantly after UCS. Serum glucose levels in the FR group were normal before UCS but increased after UCS. Serum insulin levels were significantly decreased in FR males but showed a slight increase in FR females before UCS; however, insulin levels decreased significantly in the FR male and female rats after UCS. Before UCS, serum lipid levels were higher in the FR males but were normal in the FR females; after UCS, FR males had a slight decrease and FR females had an increasing trend in serum lipids levels. Lipid droplets in the hypothalamus, pituitary gland, and livers of the FR group indicated steatosis. Conclusions These results suggest that prenatal food restriction alters HPA axis-associated neuroendocrine metabolism in adult offspring fed a high-fat diet, which may originate from the intrauterine programming and increase the susceptibility to adult metabolic diseases.

Li Zhang; Dan Xu; Benjian Zhang; Yansong Liu; Fenglong Chu; Yuming Guo; Jun Gong; Xun Zheng; Liaobin Chen; Hui Wang

2013-01-01T23:59:59.000Z

244

EMSL - Single Particle Laser Ablation  

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

single-particle-laser-ablation en Effect of Solar Radiation on the Optical Properties and Molecular Composition of Laboratory Proxies of Atmospheric Brown Carbon http:...

245

Nanochannel based single molecule recycling.  

E-Print Network [OSTI]

??Single molecule fluorescence measurements provide detailed information about sub-populations, transition intermediates and kinetic data for systems that are not able to be synchronized by removing (more)

Lesoine, John Frederick (1980 - )

2010-01-01T23:59:59.000Z

246

Raindrop axis ratios, fall velocities and size distribution over Sumatra from 2D-Video Disdrometer measurement  

Science Journals Connector (OSTI)

Raindrop axis ratio, falling velocity and size distribution are important in broad list of applications. However, they are not frequently observed in the equatorial region. This paper elucidated the characteristics of raindrop axis ratio, falling velocity and size distribution based on 2D-Video Disdrometer (2DVD) data that have been collected in the equatorial Indonesia, particularly at Kototabang (hereafter called KT), west Sumatra, Indonesia (0.20S, 100.32E, 864m above sea level). A comprehensive follow-up of the previous study on the natural variability of raindrop size distributions (DSDs) is presented. Precipitation was classified through 1.3-GHz wind profiler observation. The dependence of raindrop falling velocity and axis ratio on rainfall type was not clearly observed. Overall, measured raindrop fall velocities were in good agreement with GunnKinzer's data. Raindrop axis ratio at KT was more spherical than that of artificial rain and equilibrium model, and close to the values reported in the turbulent high shear zone of surface layer which can be partially due to the effect of the instrument errors (e.g., location and container shape). Of some natural variations of DSD investigated, the dependence of DSD on rainfall rate and rainfall type as well as diurnal variation was clearly visible. A striking contrast between the stratiform and convective rains is that the size distributions from the stratiform (convective) rains tend to narrow (broaden) with increasing rainfall rates. For rainfall rate R<10mm/h, the size distribution of stratiform was broader than that of convective. On the other hand, at higher rainfall rate more large-sized drops were found in convective rain. During the convective rain, very large-sized drops were found mainly at the very start of rain event while for the stratiform they were found to be associated with a strong bright band. In diurnal basis, the \\{DSDs\\} in the morning hours were narrower than those in the evening which was indicated by smaller Dm values in the morning hours than their counterparts in the evening. Rainfall type dependence and diurnal variation of DSD lead to significant variation of ZR relations so that they must be considered to increase the accuracy of ZR conversion from weather radar in this region. Consistent with the previous study, lack of seasonal DSD variability was also found in this work that would be due to significant local convective and orographic effect at this region throughout the year. However, Dm values in our result were larger than the typical orographic DSD.

Marzuki; Walter L. Randeu; Toshiaki Kozu; Toyoshi Shimomai; Hiroyuki Hashiguchi; Michael Schnhuber

2013-01-01T23:59:59.000Z

247

Electron-microscopy study of the triple-q to single-q phase transition in the incommensurate phase of quartz under stress  

Science Journals Connector (OSTI)

The triple-q to single-q phase transition in quartz has been studied by electron microscopy using a heating straining device, stress being applied along the x axis. The interpretation of the experimental images obtained for small values of stress is in agreement with theoretical predictions. The presence of an intermediate state between the triple-q and single-q modulated phases has been observed for higher values of stress. It can be described as a double-q state where the two wave vectors are tilted from the y direction by an angle of +cphi and -cphi that decreases to 0 in the single-q stripe phase.

E. Snoeck and C. Roucau

1992-06-01T23:59:59.000Z

248

Heralded single photon absorption by a single atom  

E-Print Network [OSTI]

The emission and absorption of single photons by single atomic particles is a fundamental limit of matter-light interaction, manifesting its quantum mechanical nature. At the same time, as a controlled process it is a key enabling tool for quantum technologies, such as quantum optical information technology [1, 2] and quantum metrology [3, 4, 5, 6]. Controlling both emission and absorption will allow implementing quantum networking scenarios [1, 7, 8, 9], where photonic communication of quantum information is interfaced with its local processing in atoms. In studies of single-photon emission, recent progress includes control of the shape, bandwidth, frequency, and polarization of single-photon sources [10, 11, 12, 13, 14, 15, 16, 17], and the demonstration of atom-photon entanglement [18, 19, 20]. Controlled absorption of a single photon by a single atom is much less investigated; proposals exist but only very preliminary steps have been taken experimentally such as detecting the attenuation and phase shift of a weak laser beam by a single atom [21, 22], and designing an optical system that covers a large fraction of the full solid angle [23, 24, 25]. Here we report the interaction of single heralded photons with a single trapped atom. We find strong correlations of the detection of a heralding photon with a change in the quantum state of the atom marking absorption of the quantum-correlated heralded photon. In coupling a single absorber with a quantum light source, our experiment demonstrates previously unexplored matter-light interaction, while opening up new avenues towards photon-atom entanglement conversion in quantum technology.

Nicolas Piro; Felix Rohde; Carsten Schuck; Marc Almendros; Jan Huwer; Joyee Ghosh; Albrecht Haase; Markus Hennrich; Francois Dubin; Jrgen Eschner

2010-04-23T23:59:59.000Z

249

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

1985. 23. Hau, E. Wind Turbines: Fundamentals, Technologies,for Floating Offshore Wind Turbines. Tech. no. NREL/CP-500-Full-scale Floating Wind Turbine." Statoil, 14 Oct. 2009.

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

250

10-Megawatt Supercritical Carbon Dioxide Turbine- FY13 Q2  

Broader source: Energy.gov [DOE]

This document summarizes the progress of this National Renewable Energy Laboratory project, funded by SunShot, for the second quarter of fiscal year 2013.

251

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

September 2007. 5. "Hywind the Worlds First Full-scaleOffshore/Hywind/Pages/HywindPuttingWindPowerToTheTest. aspx4 Figure 1.3: Hywind concept floating wind turbine [

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

252

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

5-MW Reference Wind Turbine for Offshore System Development.for Floating Offshore Wind Turbines. Tech. no. NREL/CP-500-a Spar-type Floating Offshore Wind Turbine. Thesis. TU Delft

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

253

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

wind turbine. Rating Control Rotor Radius Rated Wind Speed Towerwind turbine is used in this design, however there are slight modifications of the tower.of the tower. Figure 2.3: NREL 5 MW Reference Wind Turbine [

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

254

LINE","COMPNAME","COMPID","YEAR","PURCNAME","SALETYPE","MEGAWATT...  

U.S. Energy Information Administration (EIA) Indexed Site

1,"Bowling Green City of",2056,1999,"TVA",,788853509,167559,0,0,36812315 999999,"Bowling Green City of",2056,1999,,,0,0,0,0,0 1,"Bozrah Light & Power Co",2089,1999,"CT Municipal...

255

LINE","COMPNAME","COMPID","YEAR","PURCNAME","SALETYPE","MEGAWATT...  

U.S. Energy Information Administration (EIA) Indexed Site

Service","NF",123991,0,0,3566208,3566208 438,"Bonneville Power Admin",1738,1999,"Williams Energy Service","OT",0,0,0,2621,2621 999999,"Bonneville Power Admin",1738,1999,,,78575192,...

256

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

for floating turbines [4]. ..15 Figure 3.1: Floating turbine degrees of freedom [the motion of a 5 MW floating turbine subjected to ocean

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

257

The Resonance Scattering Phenomenon of Fast Negatively Charged Particles in a Single Crystal  

E-Print Network [OSTI]

The energy spectrum of the extended attractive potential of a crystallographic row for negatively charged particles has quasi-bound states. It follows that a negatively charged particle with small transversal momentum component ($p_{\\bot} R <<1$) may undergo resonance scattering. Thus the resonance scattering phenomenon can be observed in a single crystal, when fast electrons move with a small glancing angle ($\\theta_0 << 1/pR$) to a crystallographic axis. The calculated results for the electrons and angular widths of resonance peaks are consistent with experimental data.

Kovalev, Gennady V

2015-01-01T23:59:59.000Z

258

Theoretical and experimental study of a new single-coil superconducting miniundulator  

E-Print Network [OSTI]

The first pre-prototype of a single-coil superconducting miniundulator has been built and studied. Its basic specifications include 10 main periods and two end compensation periods, a period length of 7 mm, and a gap of 2 mm. The design is based on a racetrack-like coil configuration that is subsequently compressed to form the gap region with the spatially alternating currents flowing perpendicularly to the electron beam above and below the midplane. Operation up to an excitation current slightly beyond 400 A before quenching resulted in a peak magnetic flux density on axis of about 1 T and an undulator parameter of K about 0.65.

Kulesza, Joe; Roscup, Neil; Diao, Cao Zheng; Deyhim, Alex; Moser, Herbert O

2014-01-01T23:59:59.000Z

259

Quantitative biology of single neurons  

Science Journals Connector (OSTI)

...1930-1931. 25 Pawley, J. B. 2006 Handbook of biological confocal microscopy. New...NY: Springer. 26 Grupen, C. 2011 Handbook of particle detection and imaging. New...biological systems are single cells. Fundamental insights gained from single-cell analysis...

2012-01-01T23:59:59.000Z

260

Single spin asymmetries in QCD  

E-Print Network [OSTI]

Measurements of single transverse spin asymmetries in high energy inclusive processes have always shown unexpected and challenging results. Several cases are considered and discussed within a QCD approach which couples perturbative dynamics to new non perturbative partonic information; the aim is that of developing a consistent phenomenological description of these unusual single spin phenomena, based on a generalized QCD factorization scheme.

Mauro Anselmino

2002-01-16T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind turbine arrays  

E-Print Network [OSTI]

Modern wind farms require significant land resources to separate each wind turbine from the adjacent turbine wakes. These aerodynamic constraints limit the amount of power that can be extracted from a given wind farm footprint. We conducted full-scale field tests of vertical-axis wind turbines in counter-rotating configurations under natural wind conditions. Whereas wind farms consisting of propeller-style turbines produce 2 to 3 watts of power per square meter of land area, these field tests indicate that power densities approaching 100 W m^-2 can be achieved by arranging vertical-axis wind turbines in layouts that enable them to extract energy from adjacent wakes. In addition, we calculated that the global wind resource available to 10-m tall turbines based on the present approach is approximately 225 trillion watts (TW), which significantly exceeds the global wind resource available to 80-m tall, propeller-style wind turbines, approximately 75 TW. This improvement is due to the closer spacing that can be a...

Dabiri, John O

2010-01-01T23:59:59.000Z

262

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part II: Mooring line and structural dynamics  

Science Journals Connector (OSTI)

Abstract The need to exploit enhanced wind resources far offshore as well as in deep waters requires the use of floating support structures to become economically viable. The conventional three-bladed horizontal axis wind turbine may not continue to be the optimal design for floating applications. Therefore it is important to assess alternative concepts in this context that may be more suitable. Vertical axis wind turbines (VAWTs) are a promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess their technical feasibility. As part of this task, a series of articles have been developed to present a comprehensive literature review covering the various areas of engineering expertise required to understand the coupled dynamics involved in floating VAWTs. This second article focuses on the modelling of mooring systems and structural behaviour of floating VAWTs, discussing various mathematical models and their suitability within the context of developing a model of coupled dynamics. Emphasis is placed on computational aspects of model selection and development as computational efficiency is an important aspect during preliminary design stages. This paper has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Maurizio Collu; Athanasios Kolios

2014-01-01T23:59:59.000Z

263

Electrochemical Quantification of Single Nucleotide Polymorphisms...  

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

Quantification of Single Nucleotide Polymorphisms Using Nanoparticle Probes. Electrochemical Quantification of Single Nucleotide Polymorphisms Using Nanoparticle Probes. Abstract:...

264

Single Cell Whole Genome Amplification  

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

Single Cell Whole Genome Amplification Single Cell Whole Genome Amplification of Uncultivated Organisms Mircea Podar , Martin Keller , and Philip Hugenholtz (* ü ) Abstract Whole genome amplification of single cells is emerging as a powerful technique for accessing the genomes of individual members of microbial communi- ties without the complication of identifying the source of sequence data posed by shotgun sequencing of environmental samples (metagenomics). This method holds particular promise for the molecular unveiling of uncultivated organisms that com- prise the bulk of the microbial diversity and functionality on our planet. 1 Introduction Over the last two decades, it has become increasingly apparent that microbial diversity

265

Single nanoparticle tracking spectroscopic microscope  

DOE Patents [OSTI]

A system that can maintain and track the position of a single nanoparticle in three dimensions for a prolonged period has been disclosed. The system allows for continuously imaging the particle to observe any interactions it may have. The system also enables the acquisition of real-time sequential spectroscopic information from the particle. The apparatus holds great promise in performing single molecule spectroscopy and imaging on a non-stationary target.

Yang, Haw (Moraga, CA); Cang, Hu (Berkeley, CA); Xu, Cangshan (Berkeley, CA); Wong, Chung M. (San Gabriel, CA)

2011-07-19T23:59:59.000Z

266

Single axioms for Boolean algebra.  

SciTech Connect (OSTI)

Explicit single axioms are presented for Boolean algebra in terms of (1) the Sheffer stroke; (2) disjunction and negation; (3) disjunction, conjunction, and negation; and (4) disjunction, conjunction, negation, 0, and 1. It was previously known that single axioms exist for these systems, but the procedures to generate them are exponential, producing huge equations. Automated deduction techniques were applied to find axioms of lengths 105, 131, 111, and 127, respectively, each with six variables.

McCune, W.

2000-06-30T23:59:59.000Z

267

Development and Verification of a Computational Fluid Dynamics Model of a Horizontal-Axis Tidal Current Turbine  

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

Development and Verification of Development and Verification of a Computational Fluid Dynamics Model of a Horizontal-Axis Tidal Current Turbine M.J. Lawson and Y. Li. National Renewable Energy Laboratory D.C. Sale University of Washington Presented at the 30 th International Conference on Ocean, Offshore, and Arctic Engineering Rotterdam, The Netherlands June 19-24, 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Conference Paper NREL/CP-5000-50981 October 2011 Contract No. DE-AC36-08GO28308 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US

268

Development and Verification of a Computational Fluid Dynamics Model of a Horizontal-Axis Tidal Current Turbine  

SciTech Connect (OSTI)

This paper describes the development of a computational fluid dynamics (CFD) methodology to simulate the hydrodynamics of horizontal-axis tidal current turbines. Qualitative measures of the CFD solutions were independent of the grid resolution. Conversely, quantitative comparisons of the results indicated that the use of coarse computational grids results in an under prediction of the hydrodynamic forces on the turbine blade in comparison to the forces predicted using more resolved grids. For the turbine operating conditions considered in this study, the effect of the computational timestep on the CFD solution was found to be minimal, and the results from steady and transient simulations were in good agreement. Additionally, the CFD results were compared to corresponding blade element momentum method calculations and reasonable agreement was shown. Nevertheless, we expect that for other turbine operating conditions, where the flow over the blade is separated, transient simulations will be required.

Lawson, M. J.; Li, Y.; Sale, D. C.

2011-10-01T23:59:59.000Z

269

Measurement of {nu}{sub {mu}} and {nu}{sub e} Events in an Off-Axis Horn-Focused Neutrino Beam  

SciTech Connect (OSTI)

We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beam line at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle (6.3 deg.) with respect to the NuMI beam axis. Samples of charged-current quasielastic {nu}{sub {mu}} and {nu}{sub e} interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam.

Adamson, P.; Brice, S. J.; Brown, B. C.; Choudhary, B. C.; Finley, D. A.; Ford, R.; Garcia, F. G.; Harris, D.; Hylen, J.; Kasper, P.; Kobilarcik, T.; Kourbanis, I.; Marchionni, A.; Marsh, W.; Mills, F.; Moore, C. D.; Prebys, E.; Russell, A. D.; Smart, W.; Spentzouris, P. [Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)] (and others)

2009-05-29T23:59:59.000Z

270

High-aperture binary axicons for the formation of the longitudinal electric field component on the optical axis for linear and circular polarizations of the illuminating beam  

SciTech Connect (OSTI)

Diffraction of uniformly polarized laser beams with vortex phase singularity is theoretically analyzed using the plane wave expansion. It is shown that for a high numerical aperture, an intense longitudinal electric field component is formed on the optical axis in this case. It is numerically demonstrated that an analogous effect is ensured for diffraction of a conventional Gaussian beam from asymmetric binary axicons. The field intensity on the optical axis can be varied either by rotating the optical element or by changing the direction of polarization of radiation.

Khonina, S. N., E-mail: khonina@smr.ru; Savelyev, D. A., E-mail: dmitrey.savelyev@yandex.ru [Russian Academy of Sciences, Institute for Image Processing Systems (Russian Federation)

2013-10-15T23:59:59.000Z

271

Single molecule measurements and molecular motors  

Science Journals Connector (OSTI)

...Hideyuki Okano and Atsushi Iriki Single molecule measurements and molecular motors...Suita, Osaka 565-0871, Japan Single molecule imaging and manipulation are...machines like molecular motors. The single molecule measurements allow a dynamic...

2008-01-01T23:59:59.000Z

272

SINGLE CELL PROTEIN | The Algae  

Science Journals Connector (OSTI)

Abstract Algae, as source of single-cell protein (SCP), is a term that refers to either microscopic single-cell true algae or prokaryotic cyanobacteria, and their growth is based on the use of carbon dioxide and light energy (autotrophic growth). In contrast with other SCP-producing organisms, algae are grown in many cases by processes resembling traditional agriculture, because they depend on large areas and sunlight radiation; on the other hand, modern production techniques include growth inside photobioreactors. Moreover, macroscopic algae are used widely as source of food, but they hardly can fit the SCP definition because of their multicellular nature and low protein content.

M. Garca-Garibay; L. Gmez-Ruiz; A.E. Cruz-Guerrero; E. Brzana

2014-01-01T23:59:59.000Z

273

Single particle-induced latchup  

SciTech Connect (OSTI)

This paper presents an up-to-date overview of the single-event latchup (SEL) hard failure mode encountered in electronic device applications involving heavy ion environment. This phenomenon is specific to CMOS technology. Single-event latchup is discussed after a short description of the effects induced by the interaction of a heavy ion with silicon. Understanding these effects is necessary to understand the different failures. This paper includes a description of the latchup phenomenon and the different triggering modes, reviews of models and hardening solutions, and finally presents new developments in simulation approaches.

Bruguier, G.; Palau, J.M. [Univ. Montpellier II (France). Centre d`Electronique de Montpellier] [Univ. Montpellier II (France). Centre d`Electronique de Montpellier

1996-04-01T23:59:59.000Z

274

Single Molecule Analysis Research Tool (SMART): An Integrated Approach for Analyzing Single Molecule Data  

E-Print Network [OSTI]

Single Molecule Analysis Research Tool (SMART): An Integrated Approach for Analyzing Single, Stanford University, Stanford, California, United States of America Abstract Single molecule studies have approach for analyzing these data in the freely available software package SMART: Single Molecule Analysis

Herschlag, Dan

275

Predictions for single spin asymmetries in $lp^{\\uparrow}\\rightarrow \\pi X $ and $\\gamma^{*} p^{\\uparrow}\\rightarrow \\pi X$  

E-Print Network [OSTI]

Predictions for the single transverse spin asymmetry A_N in semi-inclusive DIS processes are given; non negligible values of A_N may arise from spin effects in the fragmentation of a polarized quark into a final hadron with a transverse momentum k_T with respect to the jet axis, the so-called Collins effect. The elementary single spin asymmetry of the fragmenting quark has been fixed in a previous paper, by fitting data on p(transv. polarized) + P -> pion + X, and the predictions given here are uniquely based on the assumption that the Collins effect is the only cause of the observed single spin asymmetries in p(transv. polarized) + p -> pion + X. Eventual spin and k_T dependences in quark distribution functions, the so-called Sivers effect, are also discussed.

Anselmino, M; Hansson, J; Murgia, F

2000-01-01T23:59:59.000Z

276

Quantitative biology of single neurons  

Science Journals Connector (OSTI)

...micropipette of the soma (b) and dendrites (c). Figure-4. Live single-cell mRNA translation...cell.2008.10.028 ) 117 Sugino, K. , C. M. Hempel, M. N. Miller, A. M. Hattox, P. Shapiro, C. Wu, Z. J. Huang, and S. B. Nelson...

2012-01-01T23:59:59.000Z

277

Germination of Single Bacterial Spores  

Science Journals Connector (OSTI)

...i--: - 1.-- I tI - I -- VOL.98,1969SINGLE-SPORE GERMINATION 11 I- il4 ZIM ............. NPR w dFIG. 3. Time-lapse phase-contrast micrographs of a germinating spore of B. cereus T. Each frame represents the change in...

Tadayo Hashimoto; W. R. Frieben; S. F. Conti

1969-06-01T23:59:59.000Z

278

Single element laser beam shaper  

DOE Patents [OSTI]

A single lens laser beam shaper for converting laser beams from any spatial profile to a flat-top or uniform spatial profile. The laser beam shaper includes a lens having two aspheric surfaces. The beam shaper significantly simplifies the overall structure in comparison with conventional 2-element systems and therefore provides great ease in alignment and reduction of cost.

Zhang, Shukui (Yorktown, VA); Michelle D. Shinn (Newport News, VA)

2005-09-13T23:59:59.000Z

279

The Vermont Yankee Nuclear Power Station will use a single-unit boilingwater  

E-Print Network [OSTI]

reactor with an initial power rating of 1593 thermal megawatts (MWt) to provide a net power output of 513 electrical megawatts (Me). The reactor will be cooled by a once-through flow of water pumped from and returned to Vernon Pond, an existing impoundment of the Connecticut River (built to serve the Vernon Hydroelectric Station) and also by means of mechanical draft cooling towers. 3. Sumnary of environmental impact including beneficial and adverse effects follows: a. Cooling water heated to about 20*F above inlet temperature will be discharged to Vernon Pond at a rate of 840 cfs when the plant operates on a total open-cycle basis. Mechanical-draft cooling towers are provided to protect Vernon Pond during low flow and critical temperature periods in the Connecticut River. b. About 150 acres of Vernon Pond in the vicinity of the station may be subjected to some thermal and biological stress from discharge of the

Vermont Yankee

280

Features of Muon Arrival Time Distributions of High Energy EAS at Large Distances From the Shower Axis  

E-Print Network [OSTI]

In view of the current efforts to extend the KASCADE experiment (KASCADE-Grande) for observations of Extensive Air Showers (EAS) of primary energies up to 1 EeV, the features of muon arrival time distributions and their correlations with other observable EAS quantities have been scrutinised on basis of high-energy EAS, simulated with the Monte Carlo code CORSIKA and using in general the QGSJET model as generator. Methodically various correlations of adequately defined arrival time parameters with other EAS parameters have been investigated by invoking non-parametric methods for the analysis of multivariate distributions, studying the classification and misclassification probabilities of various observable sets. It turns out that adding the arrival time information and the multiplicity of muons spanning the observed time distributions has distinct effects improving the mass discrimination. A further outcome of the studies is the feature that for the considered ranges of primary energies and of distances from the shower axis the discrimination power of global arrival time distributions referring to the arrival time of the shower core is only marginally enhanced as compared to local distributions referring to the arrival of the locally first muon.

I. M. Brancus; H. Rebel; A. F. Badea; A. Haungs; C. D. Aiftimiei; J. Oehlschlaeger; M. Duma

2002-12-20T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Integral-Field Spectroscopy of the Post Red Supergiant IRC +10420: evidence for an axi-symmetric wind  

E-Print Network [OSTI]

We present NAOMI/OASIS adaptive-optics assisted integral-field spectroscopy of the transitional massive hypergiant IRC +10420, an extreme mass-losing star apparently in the process of evolving from a Red Supergiant toward the Wolf-Rayet phase. To investigate the present-day mass-loss geometry of the star, we study the appearance of the line-emission from the inner wind as viewed when reflected off the surrounding nebula. We find that, contrary to previous work, there is strong evidence for wind axi-symmetry, based on the equivalent-width and velocity variations of H$\\alpha$ and Fe {\\sc ii} $\\lambda$6516. We attribute this behaviour to the appearance of the complex line-profiles when viewed from different angles. We also speculate that the Ti {\\sc ii} emission originates in the outer nebula in a region analogous to the Strontium Filament of $\\eta$ Carinae, based on the morphology of the line-emission. Finally, we suggest that the present-day axisymmetric wind of IRC +10420, combined with its continued blueward evolution, is evidence that the star is evolving toward the B[e] supergiant phase.

Ben Davies; Ren D. Oudmaijer; Kailash C. Sahu

2007-08-16T23:59:59.000Z

282

Status of Advanced Tokamak Scenario Modeling with Off-Axis Electron Cyclotron Current Drive in DIII-D  

SciTech Connect (OSTI)

The status of modeling work focused on developing the advanced tokamak scenarios in DIII-D is discussed. The objectives of the work are two-fold: (1) to develop AT scenarios with ECCD using time-dependent transport simulations, coupled with heating and current drive models, consistent with MHD equilibrium and stability; and (2) to use time-dependent simulations to help plan experiments and to understand the key physics involved. Time-dependent simulations based on transport coefficients derived from experimentally achieved target discharges are used to perform AT scenario modeling. The modeling indicates off-axis ECCD with approximately 3 MW absorbed power can maintain high-performance discharges with q{sub min} > 1 for 5 to 10 s. The resultant equilibria are calculated to be stable to n = 1 pressure driven modes. The plasma is well into the second stability regime for high-n ballooning modes over a large part of the plasma volume. The role of continuous localized ECCD is studied for stabilizing m/n = 2/1 tearing modes. The progress towards validating current drive and transport models, consistent with experimental results, and developing self-consistent, integrated high performance AT scenarios is discussed.

M. Murakami; H.E. St.John; T.A. Casper; M.S. Chu; J.C. DeBoo; C.M. Greenfield; J.E. Kinsey; L.L. Lao; R.J. La Haye; Y.R. Lin-Liu; T.C. Luce; P.A. Politzer; B.W. Rice; G.M. Staebler; T.S. Taylor; M.R. Wade

1999-12-01T23:59:59.000Z

283

The detection efficiency of on-axis short gamma ray burst optical afterglows triggered by aLIGO/Virgo  

E-Print Network [OSTI]

Assuming neutron star (NS) or neutron star/stellar-mass black hole (BH) mergers as progenitors of the short gamma ray bursts, we derive and demonstrate a simple analysis tool for modelling the efficiency of recovering on-axis optical afterglows triggered by a candidate gravitational wave event detected by the Advanced LIGO and Virgo network. The coincident detection effiency has been evaluated for different classes of operating telescopes using observations of gamma ray bursts. We show how the efficiency depends on the luminosity distribution of the optical afterglows, the telescope features, and the sky localisation of gravitational wave triggers. We estimate a plausible optical afterglow and gravitational wave coincidence rate of $1$ yr$^{-1}$ ($0.1$ yr$^{-1}$) for NS-NS (NS-BH), and how this rate is scaled down in detection efficiency by the time it takes to image the gravitational wave sky localization and the limiting magnitude of the telescopes. For NS-NS (NS-BH) we find maximum detection efficiencies o...

Coward, David; Howell, Eric; Lasky, Paul; Boer, Michel

2014-01-01T23:59:59.000Z

284

Three mirror off axis integrated cavity output spectroscopy for the detection of ethylene using a quantum cascade laser  

Science Journals Connector (OSTI)

Abstract We demonstrate the performance of a compact and robust gas sensor based on a pulsed distributed feedback quantum cascade laser (QCL, laser pulses 30ns, repetition rate 1MHz) in combination with off-axis integrated cavity output spectroscopy (OA-ICOS) in an improved 3 mirror configuration. The room temperature laser (wavelength 915cm?1) was wavelength tuned over ?0.25cm?1 with a 4kHz repetition frequency. A detection limit of 10 ppbv (part-per-billion volume) for regular OA-ICOS is demonstrated for ethylene in 2min averaging time, which is equal to a noise equivalent absorption sensitivity (NEAS) of 1נ10?8cm?1Hz?1/2. An improved three mirror configuration OA-ICOS scheme showed a four times increase in sensitivity as compared to standard OA-ICOS, resulting in a NEAS of 2.5נ10?9cm?1Hz?1/2. The sensor was used for ethylene detection from apples, stored under controlled atmosphere conditions.

R. Centeno; J. Mandon; S.M. Cristescu; F.J.M. Harren

2014-01-01T23:59:59.000Z

285

Fast In Situ Airborne Measurement of Ammonia Using a Mid-Infrared Off-Axis ICOS Spectrometer  

SciTech Connect (OSTI)

A new ammonia (NH3) spectrometer was developed based on off-axis integrated cavity output spectroscopy. Its feasibility was demonstrated in airborne test flights in the troposphere on board of the Department of Energy (DOE) Gulfstream-1 (G-1) aircraft. This ammonia gas analyzer consists of an optical cell, a quantum-cascade laser, gas sampling system, electronics for control and data acquisition, and data-analysis software. The NH3 mixing ratio is determined from high-resolution NH3 absorption line shapes by tuning the laser wavelength over the sR(3,K) transition of the fundamental vibration band near 9.67 ?m. Excellent linearity is obtained in a wide range (0- 101 ppb) during calibration. The instrument is capable of collecting data at 2 Hz. Two research flights were conducted over Sunnyside, Washington. In the first test flight, the ammonia gas sensor was used to identify signatures of feedstock from local dairy farms with high vertical spatial resolution under low wind and stable atmospheric conditions. In the second flight, the NH3 spectrometer showed high sensitivity in capturing feedstock emission signals under windy and less stable conditions. Our results demonstrate that this new ammonia spectrometer is airborne feasible and that it has the capability to provide fast in situ observations of ammonia to advance our understanding of atmospheric compositions and aerosol formation.

Leen, Brian; Yu, Xiao-Ying; Gupta, Manish; Baer, Douglas S.; Hubbe, John M.; Kluzek, Celine D.; Tomlinson, Jason M.; Hubbell, Michael R.

2013-09-17T23:59:59.000Z

286

Cheliensisin A Inhibits EGF-Induced Cell Transformation with Stabilization of p53 Protein Via a Hydrogen Peroxide/Chk1-Dependent Axis  

Science Journals Connector (OSTI)

...activation of p53 by hydrogen peroxide/Chk1-dependent axis. Materials and Methods Chemicals Chel A [6...Chel A using the same method as was used for the...used to monitor the production of hydrogen peroxide, with the...

Jingjie Zhang; Guangxun Gao; Liang Chen; Xu Deng; Jingxia Li; Yonghui Yu; Dongyun Zhang; Fei Li; Min Zhang; Qinshi Zhao; and Chuanshu Huang

2013-09-01T23:59:59.000Z

287

Small molecules activators of the Nrf2-HO-1 antioxidant axis modulate heme metabolism and inflammation in BV2 microglia cells  

E-Print Network [OSTI]

1 Small molecules activators of the Nrf2-HO-1 antioxidant axis modulate heme metabolism, 16163 Genova, Italy d Department of Clinical and Molecular Biomedicine, Section of Pharmacology-associated protein-1; INF- , interferon- ISL, isoliquiritigenin; LPS, lipopolysaccharide; Nrf2, HF-E2 p45-related

Boyer, Edmond

288

he defining element of modern wind farms is the pro-peller-like structure known as a horizontal-axis wind  

E-Print Network [OSTI]

T he defining element of modern wind farms is the pro- peller-like structure known as a horizontal-axis wind turbine.Amarvel of engineering, the HAWT typically comprises more than 8000 parts, and its blades it converts wind energy into electricity. In 1920 Albert Betz derived a theoretical limit on that efficiency

Dabiri, John O.

289

Three-Dimensional Descriptions Based on the Analysis of the Invariant and Quasi-Invariant Properties of Some Curved-Axis Generalized Cylinders  

Science Journals Connector (OSTI)

AbstractWe address the recovery of object-level 3-D descriptions of some classes of curved-axis generalized cylinders. For this, the first part of the paper analyzes the projective properties of two common generic shapes, planar right constant generalized ... Keywords: Shape description, generalized cylinders, invariants, quasi-invariants, segmentation, grouping.

Mourad Zerroug; Ramakant Nevatia

1996-03-01T23:59:59.000Z

290

Disruption of Laminin-Integrin-CD151-Focal Adhesion Kinase Axis Sensitizes Breast Cancer Cells to ErbB2 Antagonists  

Science Journals Connector (OSTI)

...Adhesion Kinase Axis Sensitizes Breast Cancer Cells to ErbB2 Antagonists Xiuwei H. Yang 1 Ludmila M. Flores 2 4 Qinglin Li 1 Pengcheng Zhou 3 Fenghui Xu 1 Ian E. Krop 2 Martin E. Hemler 1 Corresponding Author: Martin E. Hemler, Dana-Farber Cancer Institute...

Xiuwei H. Yang; Ludmila M. Flores; Qinglin Li; Pengcheng Zhou; Fenghui Xu; Ian E. Krop; Martin E. Hemler

2010-03-15T23:59:59.000Z

291

Magnetic structure of Sr{sub 2}Fe{sub 2}O{sub 5} brownmillerite by single-crystal Mssbauer spectroscopy  

SciTech Connect (OSTI)

In order to determine orientation of the Fe{sup 3+} magnetic moments and electric field gradient (efg) axes in the brownmillerite-type strontium ferrite structure for both iron sublattices where the efg tensor is not axially symmetric, the Mssbauer spectra of powdered and oriented single-crystal Sr{sub 2}Fe{sub 2}O{sub 5} were analyzed by solving the complete Hamiltonian for hyperfine interactions in the excited and ground states of the {sup 57}Fe nuclei. The magnetic moments of both octahedrally and tetrahedrally coordinated iron cations lie on the ac-plane of the orthorhombic unit cell and are parallel to the shortest c-axis, whilst the main efg axes are parallel to the longest crystallographic axis, b. This orientation is similar to that in Ca{sub 2}Fe{sub 2}O{sub 5}, in spite of the structural differences of strontium and calcium ferrite brownmillerites at low temperatures. - Graphical abstract: Mssbauer spectra of powdered and oriented single-crystal Sr{sub 2}Fe{sub 2}O{sub 5}, analyzed by solving the complete Hamiltonian for hyperfine interactions in the excited and ground states of the {sup 57}Fe nuclei, show that the magnetic moments of both octahedrally and tetrahedrally coordinated iron cations are parallel to the shortest c-axis of the orthorhombic brownmillerite unit cell . Display Omitted - Highlights: Single-crystal Mssbauer spectroscopy is used to study magnetic structure of Sr{sub 2}Fe{sub 2}O{sub 5}. Complete Hamiltonian for hyperfine interactions in excited and ground states was solved. Fe{sup 3+} magnetic moments are parallel to the shortest crystallographic axis c. The orientation of nuclear electric field gradient is similar to that in Ca{sub 2}Fe{sub 2}O{sub 5}.

Waerenborgh, J.C. [UCQR, IST/ITN, Instituto Superior Tcnico, Universidade Tcnica de Lisboa, CFMC-UL, Estrada Nacional 10, 2686-953 Sacavm (Portugal); Tsipis, E.V. [UCQR, IST/ITN, Instituto Superior Tcnico, Universidade Tcnica de Lisboa, CFMC-UL, Estrada Nacional 10, 2686-953 Sacavm (Portugal); Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Auckett, J.E.; Ling, C.D. [School of Chemistry, The University of Sydney, Sydney 2006 (Australia); Kharton, V.V., E-mail: kharton@ua.pt [Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Institute of Solid State Physics RAS, Chernogolovka 142432, Moscow Region (Russian Federation)

2013-09-15T23:59:59.000Z

292

Fundamental Study of Single Biomass Particle Combustion  

E-Print Network [OSTI]

Fundamental Study of Single Biomass Particle Combustion Maryam Momeni #12;Fundamental Study of Single Biomass Particle Combustion Maryam Momeni Dissertation submitted to the Faculty of Engineering Fundamental Study of Single Biomass Particle Combustion This thesis is a comprehensive study of single biomass

Berning, Torsten

293

Effect of an AC electric field on the conductance of single-wall semiconductor-type carbon nanotubes  

SciTech Connect (OSTI)

The effect of an ac electric field on the conductance of a system of single-wall semiconductor-type carbon nanotubes placed in a dc electric field is considered. The strength vectors of dc and ac electric fields are directed along the nanotube axis. The electronic system of carbon nanotubes is considered in the context of the Boltzmann kinetic equation in the relaxation-time approximation. The dependence of the current density in the system on the characteristics of applied fields is studied. The effect of absolute negative conductance is detected.

Belonenko, M. B.; Glazov, S. Yu., E-mail: ser-glazov@yandex.ru [Volgograd State Pedagogical University (Russian Federation); Mescheryakova, N. E., E-mail: Dandelion1@yandex.ru [Volgograd Business Institute (Russian Federation)

2010-09-15T23:59:59.000Z

294

Crystal structure of La{sub 2}Mo{sub 2}O{sub 9} single crystals doped with bismuth  

SciTech Connect (OSTI)

Precision X-ray diffraction studies of La{sub 2-x}Bi{sub x}Mo{sub 2}O{sub 9} (x = 0.04, 0.06, and 0.18) single crystals are performed. It is found that in the compounds doped with bismuth, analogously with the structure of the metastable {beta}{sub ms} phase of pure La{sub 2}Mo{sub 2}O{sub 9} (LM), the La, Mo1, and O1 atoms deviate from the threefold axis on which they are located in the high-temperature {beta} phase. It is shown that bismuth atoms substitute for part of lanthanum atoms and occupy a position at the threefold axis in the neighborhood of the split lanthanum position. The implantation of bismuth atoms in the LM structure results in the return of a part of the molybdenum atoms to the position at the threefold axis. The occupancy of this position is equal to the occupancy of the bismuth atomic position.

Alekseeva, O. A., E-mail: olalex@ns.crys.ras.ru; Verin, I. A.; Sorokina, N. I.; Krasil'nikova, A. E. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Voronkova, V. I. [Moscow State University, Faculty of Physics (Russian Federation)

2010-07-15T23:59:59.000Z

295

A low-temperature sample orienting device for single crystal spectroscopy at the SNS  

SciTech Connect (OSTI)

A low temperature sample orientation device providing three axes of rotation has been successfully built and is in testing for use on several spectrometers at the spallation neutron source (SNS). Sample rotation about the vertical ({omega}) axis of nearly 360{sup o} and out of plane tilts ({phi} and {nu}) of from -3.4{sup o} to 4.4{sup o} and from -2.8{sup o} to 3.5{sup o}, respectively, are possible. An off-the-shelf closed cycle refrigerator (CCR) is mounted on a room temperature sealed rotary flange providing {omega} rotations of the sample. Out-of-plane tilts are made possible by piezoelectric actuated angular positioning devices mounted on the low temperature head of the CCR. Novel encoding devices based on magnetoresistive sensors have been developed to measure the tilt stage angles. This combination facilitates single crystal investigations from room temperature to 3.1 K. Commissioning experiments of the rotating CCR for both powder and single crystal samples have been performed on the ARCS spectrometer at the SNS. For the powder sample this device was used to continuously rotate the sample and thus average out any partial orientation of the powder. The powder rings observed in S(Q) are presented. For the single crystal sample, the rotation was used to probe different regions of momentum transfer (Q-space). Laue patterns obtained from a single crystal sample at two rotation angles are presented.

Bruce, Douglas R [ORNL; Gaulin, Bruce D. [McMaster University; Granroth, Garrett E [ORNL; Roberts II, Charles K [ORNL; Sherline, Todd E [ORNL; Solomon, Landon M [ORNL

2010-01-01T23:59:59.000Z

296

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

Carbon Nanotubes into Single-Molecule Circuitry Brett R.to a single binding site, single molecule precision can beto directly transduce single-molecule interactions such as

Collins, Philip G

2007-01-01T23:59:59.000Z

297

Mixed convection flow and heat transfer in entrance region of rectangular ducts rotating about a parallel axis  

SciTech Connect (OSTI)

The objective of the present work is to investigate the laminar mixed convection flow and heat transfer in the entrance region of heated rectangular ducts rotating about a parallel axis. Heating conditions of isothermal and iso-flux are both considered. Boussinesq approximation is invoked to take into account buoyancy effect induced by centrifugal force. Navier-Stokes/Boussinesq system can be cast into a dimensionless form, in which five governing parameters, the Prandtl number Pr, rotational Reynolds number J, rotational Grashof number Gr{sub {Omega}}, aspect ratio {gamma} and the eccentricity E, are involved. Mechanisms of secondary vortex development in the ducts are explored by a theoretical analysis on vorticity transport equation. The values of Pr and E are fixed as 0.7 and 10, respectively. For various combinations of the other thee parameters, a vorticity-velocity method implemented with a marching technique is employed to solve the resultant three-dimensional system for simultaneously developing flow and temperature fields. The emphasis is placed on the rotational effects, including both coriolis force and centrifugal buoyancy; on the non-isothermal flow and the related heat transfer. The results reveal that the friction factors and heat transfer rates can be enhanced by Coriolis and rotation-induced buoyancy effects; and the variations of the local values are closely related to the evolution of the secondary vortices in ducts. The differences in flow behaviors and thermal characteristics for UWT and UHF are also investigated by the present theoretical analysis on secondary flow mechanism as well as the computational results.

Soong, C.Y. [Chung Cheng Inst. of Tech., Taoyuan (Taiwan, Province of China). Dept. of Aeronautical Engineering; Yan, W.M. [Hua Fan Coll. of Humanities and Technology, Taipei (Taiwan, Province of China). Dept. of Mechanical Engineering

1995-12-31T23:59:59.000Z

298

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part III: Hydrodynamics and coupled modelling approaches  

Science Journals Connector (OSTI)

Abstract The need to further exploit offshore wind resources has pushed offshore wind farms into deeper waters, requiring the use of floating support structures to be economically sustainable. The use of conventional wind turbines may not continue to be the optimal design for floating applications. Therefore it is important to assess other alternative configurations in this context. Vertical axis wind turbines (VAWTs) are one promising configuration, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess the technical feasibility. As part of this task, a series of articles have been developed to present a comprehensive literature review covering the various areas of engineering expertise required to understand the coupled dynamics involved in floating VAWTs. This third article focuses on approaches to develop an efficient coupled model of dynamics (considering aerodynamics, hydrodynamics, structural and mooring line dynamics, and control dynamics) for floating VAWTs, as well as suitable semi-analytical hydrodynamic models for this type of coupled dynamics models. Emphasis is also placed on utilising computationally efficient models and programming strategies. A comparison of the various forces acting on a floating VAWT with the three main floating support structure (spar, semi-submersible and tension-leg-platform) is also presented to highlight the relative dominant forces and hence importance of model accuracy representing these forces. Lastly a concise summary covering this series of articles is presented to give the reader an overview of this interdisciplinary research area. This article has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Maurizio Collu

2014-01-01T23:59:59.000Z

299

How Does a Single Pt Nanocatalyst Behave in Two Different Reactions? A Single-Molecule Study  

E-Print Network [OSTI]

How Does a Single Pt Nanocatalyst Behave in Two Different Reactions? A Single-Molecule Study Kyu ABSTRACT: Using single-molecule microscopy of fluoro- genic reactions we studied Pt nanoparticle catalysis. KEYWORDS: Single-particle catalysis, platinum nanoparticles, single-molecule imaging, deacetylation

Chen, Peng

300

Theory of single photon on demand from a single molecule sourcew and Eli Barkaib  

E-Print Network [OSTI]

Theory of single photon on demand from a single molecule sourcew Yong Hea and Eli Barkaib Received for the description of cryogenic temperature single molecules, and that experiments were conducted very close single molecules,7­9 single quantum dots,10­12 or nitrogen vacancy color centers,13 are nowadays

Barkai, Eli

Note: This page contains sample records for the topic "megawatt single axis" 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

We have completed installing our upgraded Multi-Technique Spectrometer/Diffractometer (Slides 3-6), together with a newly completed five-axis variable-temperature sample manipulator (Slides 7-9), other  

E-Print Network [OSTI]

We have completed installing our upgraded Multi-Technique Spectrometer/Diffractometer (Slides 3-6), together with a newly completed five-axis variable-temperature sample manipulator (Slides 7-9), other mechanical upgrades to improve spectrometer rotation and provide a sixth axis of sample rotation (Slide 10

Fadley, Charles

302

Better Randomness with Single Photons  

E-Print Network [OSTI]

Randomness is one of the most important resources in modern information science, since encryption founds upon the trust in random numbers. Since it is impossible to prove if an existing random bit string is truly random, it is relevant that they be generated in a trust worthy process. This requires specialized hardware for random numbers, for example a die or a tossed coin. But when all input parameters are known, their outcome might still be predicted. A quantum mechanical superposition allows for provably true random bit generation. In the past decade many quantum random number generators (QRNGs) were realized. A photonic implementation is described as a photon which impinges on a beam splitter, but such a protocol is rarely realized with non-classical light or anti-bunched single photons. Instead, laser sources or light emitting diodes are used. Here we analyze the difference in generating a true random bit string with a laser and with anti-bunched light. We show that a single photon source provides more r...

Oberreiter, Lukas

2014-01-01T23:59:59.000Z

303

Single-Molecule Stochastic Resonance  

Science Journals Connector (OSTI)

Stochastic resonance (SR) is a well-known phenomenon in dynamical systems. It consists of the amplification and optimization of the response of a system assisted by stochastic (random or probabilistic) noise. Here we carry out the first experimental study of SR in single DNA hairpins which exhibit cooperatively transitions from folded to unfolded configurations under the action of an oscillating mechanical force applied with optical tweezers. By varying the frequency of the force oscillation, we investigate the folding and unfolding kinetics of DNA hairpins in a periodically driven bistable free-energy potential. We measure several SR quantifiers under varied conditions of the experimental setup such as trap stiffness and length of the molecular handles used for single-molecule manipulation. We find that a good quantifier of the SR is the signal-to-noise ratio (SNR) of the spectral density of measured fluctuations in molecular extension of the DNA hairpins. The frequency dependence of the SNR exhibits a peak at a frequency value given by the resonance-matching condition. Finally, we carry out experiments on short hairpins that show how SR might be useful for enhancing the detection of conformational molecular transitions of low SNR.

K. Hayashi; S. de Lorenzo; M. Manosas; J. M. Huguet; F. Ritort

2012-08-24T23:59:59.000Z

304

Influence of compensator thickness, field size, and off-axis distance on the effective attenuation coefficient of a cerrobend compensator for intensity-modulated radiation therapy  

SciTech Connect (OSTI)

Intensity-modulated radiation therapy (IMRT) can be performed by using compensators. To make a compensator for an IMRT practice, it is required to calculate the effective attenuation coefficient (?{sub eff}) of its material, which is affected by various factors. We studied the effect of the variation of the most important factors on the calculation of the ?{sub eff} of the cerrobend compensator for 6-MV photon beams, including the field size, compensator thickness, and off-axis distance. Experimental measurements were carried out at 100 cm source-to-surface distance and 10 cm depth for the 6-MV photon beams of an Elekta linac using various field size, compensator thickness, and off-axis settings. The field sizes investigated ranged from 4 4 to 25 25 cm{sup 2} and the cerrobend compensator thicknesses from 0.56 cm. For a fixed compensator thickness, variation of the ?{sub eff} with the field size ranged from 3.76.8%, with the highest value attributed to the largest compensator thickness. At the reference field size of 10 10 cm{sup 2}, the ?{sub eff} varied by 16.5% when the compensator thickness was increased from 0.56 cm. However, the variation of the ?{sub eff} with the off-axis distance was only 0.99% at this field size, whereas for the largest field size, it was more significant. Our results indicated that the compensator thickness and field size have the most significant effect on the calculation of the compensator ?{sub eff} for the 6-MV photon beam. Therefore, it is recommended to consider these parameters when calculating the compensator thickness for an IMRT practice designed for these beams. The off-axis distance had a significant effect on the calculation of the ?{sub eff} only for the largest field size. Hence, it is recommended to consider the effect of this parameter only for field sizes larger than 25 25 cm{sup 2}.

Haghparast, Abbas [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Islamic Republic of Iran (Iran, Islamic Republic of); Hashemi, Bijan, E-mail: bhashemi@modares.ac.ir [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Islamic Republic of Iran (Iran, Islamic Republic of); Eivazi, Mohammad Taghi [Department of Medical Physics, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Islamic Republic of Iran (Iran, Islamic Republic of)

2013-04-01T23:59:59.000Z

305

Photon tunnelling microscopy of polyethylene single crystals  

E-Print Network [OSTI]

Photon tunnelling microscopy of polyethylene single crystals Mohan Srinivasarao* and Richard S:photon tunnellingmicroscopy;single crystals; polyethylene) INTRODUCTION The study of morphology of polymers is an area

Srinivasarao, Mohan

306

Toward single-cycle optical pulses  

E-Print Network [OSTI]

Single-cycle optical pulses, the never-before-achieved regime, have a great potential for attosecond science and phase-sensitive nonlinear optics. To achieve single-cycle optical pulses by active synchronization, three ...

Kim, Jung-Won, 1976-

2004-01-01T23:59:59.000Z

307

Single-Molecule Imaging in Live Cells  

Science Journals Connector (OSTI)

This chapter provides a comprehensive overview of how single-molecule imaging is achieved in live cells. The ... with a particular focus on how they influence single-molecule imaging in live cells. A few fluoresc...

Jie Xiao

2009-01-01T23:59:59.000Z

308

12 - Single-charge transport in graphene  

Science Journals Connector (OSTI)

Abstract: The single-charge tunneling behavior in graphene devices is reviewed and the Coulomb blockade phenomena observed in graphene constrictions, patterned single-electron transistors and graphene nanoribbons are compared with those observed in the conventional single-electron transistors with metallic islands. The phenomena that occur when compressible quantum dots are formed in graphene in the quantum Hall regime, including mesoscopic conductance fluctuations resulting from single-charge tunneling into/out of the quantum dots, are discussed.

D.S. Lee

2014-01-01T23:59:59.000Z

309

Single Organic Microtwist with Tunable Pitch  

Science Journals Connector (OSTI)

Single Organic Microtwist with Tunable Pitch ... Initially, some short twists with lengths of only several pitches are formed. ...

Hai-Bo Chen; Yan Zhou; Jie Yin; Jing Yan; Yuguo Ma; Lei Wang; Yong Cao; Jian Wang; Jian Pei

2009-04-17T23:59:59.000Z

310

Single-molecule Fluorescence Spectroelectrochemistry of Cresyl...  

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

molecule Fluorescence Spectroelectrochemistry of Cresyl Violet. Single-molecule Fluorescence Spectroelectrochemistry of Cresyl Violet. Abstract: We coupled scanning fluorescence...

311

PHOTOCATALYTIC AND PHOTOELECTROCHEMICAL HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS  

E-Print Network [OSTI]

HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS F.HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS

Wagner, F.T.

2012-01-01T23:59:59.000Z

312

Nanoscale Calorimetry of Isolated Polyethylene Single Crystals  

E-Print Network [OSTI]

Nanoscale Calorimetry of Isolated Polyethylene Single Crystals A. T. KWAN, M. YU. EFREMOV, E. A-film differential scanning calorimetry to investigate the melt- ing of isolated polyethylene single crystals of lamellar single crystals of polyethylene (PE). We obtain thickness, diffraction, and calorimetry data

Allen, Leslie H.

313

Single molecule spectroscopy of tetrahedral oligophenylenevinylene molecules  

E-Print Network [OSTI]

Single molecule spectroscopy of tetrahedral oligophenylenevinylene molecules Melissa A. Summers form 17 July 2002 Abstract We probe the fluorescence from single molecules of a new class molecules and compare these signals with the fluorescence from single arm molecules. Our results show

Buratto, Steve

314

Single-crystal neutron diffraction studies on Ni-based metal-pnictide superconductor BaNi2As2  

SciTech Connect (OSTI)

We report the results of single-crystal neutron diffraction studies of the superconductor BaNi{sub 2}As{sub 2}. The experiments were performed on a tiny crystal of mass 0.8 mg at several temperatures between 20 and 200 K using the Single Crystal Diffractometer, SCD, at the Los Alamos Neutron Science Center. Above 130 K, BaNi{sub 2}As{sub 2} crystallizes in the tetragonal ThCr{sub 2}Si{sub 2} structure. Our neutron diffraction data corroborate a first-order structural transition around 130 K with a relatively large hysteresis of about 10K, in agreement with observations from bulk studies. The anisotropic thermal displacement coefficients are enhanced along c-axis approaching the transition, and a splitting is observed for in-plane type reflections below the transition, which is evidence for a change in crystal structure.

Kothapalli, Karunakar [Los Alamos National Laboratory; Ronning, F [Los Alamos National Laboratory; Bauer, E D [Los Alamos National Laboratory; Schultz, A J [Los Alamos National Laboratory; Nakotte, Heinz [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

315

Supporting Information to: Single-Molecule Electrocatalysis by Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

S1 Supporting Information to: Single-Molecule Electrocatalysis by Single-Walled Carbon Nanotubes. Experimental Methods I.1. Purification of SWNTs. The single-walled carbon nanotubes were purchased from Carbon Nanotechnologies Incorporated (Purified HiPCO single-walled carbon nanotubes). These SWNTs have an average diameter

Chen, Peng

316

Multiple events on single molecules: Unbiased estimation in single-molecule biophysics  

E-Print Network [OSTI]

Multiple events on single molecules: Unbiased estimation in single-molecule biophysics Daniel A, Princeton, NJ, December 6, 2005 (received for review June 24, 2005) Most analyses of single-molecule of a motor protein acting on a single molecule must not exceed the total molecule length. We have developed

Dekker, Nynke

317

Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule magnets  

E-Print Network [OSTI]

Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule through individual single-molecule magnets SMMs . The devices were patterned via multiple layers molecules have received considerable attention over the last several years due to the introduction of single

del Barco, Enrique

318

Single-Chain Antibody Library  

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

Researchers at Pacific Northwest National Laboratory (PNNL) have constructed a nonimmune library consisting of 109 human antibody scFv fragments, which have been cloned and expressed on the surface of yeast. Nanomolar-affinity scFvs are routinely obtained by magnetic bead screening and flow cytometric sorting. The yeast library can be amplified 1010 fold without measurable loss of clonal diversity. This allows for indefinite expansion of the library. All scFv clones can be assessed directly on the yeast cell surface by immunofluorescent labeling and flow cytometry, obviating separate subcloning, expression, and purification steps. The ability to use multiplex library screening demonstrates the utility of this approach for high-throughput antibody isolation for proteomic applications. The yeast library may be used for research projects or teaching performed for U.S. Government purposes only. If you would like to request an aliquot of the single-chain antibody library for your research, please print and fill out the Materials Transfer Agreement (MTA) [PDF, 20K]. The website provides the contact information for mailing the MTA. [copied from http://www.sysbio.org/dataresources/singlechain.stm

Baird, Cheryl

319

Single-Molecule Flourescence/Patch Clamp Microscope | EMSL  

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

Single-Molecule FlourescencePatch Clamp Microscope Single-Molecule FlourescencePatch Clamp Microscope At EMSL, researchers use the single-molecule fluorescencepatch clamp...

320

Monitoring Single Molecule Reactivity On a Carbon Nanotube  

E-Print Network [OSTI]

LETTERS Monitoring Single-Molecule Reactivity on a Carbondevice directly transduces single-molecule attachments andoptical methods in single-molecule research. Compared to

Collins, Philip G

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Single Molecule Spectroscopy for Studying Conformational Dynamics of Short Oligonucleotides  

E-Print Network [OSTI]

to the activity of a single molecule. Over the past twentyallow researchers to use single molecule approaches to forLaser Excitation of Single Molecules. Accounts of Chemical

Lin, Ron Reuven

2012-01-01T23:59:59.000Z

322

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

Three-terminal, single molecule circuits based on carbonHowever, reliable single- molecule devices remainnew architecture for studying single- molecule behavior that

Collins, Philip G

2007-01-01T23:59:59.000Z

323

Single molecule studies of DNA packaging by bacteriophages  

E-Print Network [OSTI]

for the study of single molecule protein- DNA interactions.Physics Studies in Single Molecule Biophysics ProfessorOF THE DISSERTATION Single Molecule Studies of DNA Packaging

Fuller, Derek Nathan

2008-01-01T23:59:59.000Z

324

Methods for parallel amplification of single DNA molecules  

E-Print Network [OSTI]

2006)BEAMing:single? moleculePCRonmicroparticlesinMutation detectionandsingle?moleculecountingusingAmplificationofDNASingleMoleculesbyLinearRolling

McElfish, Erin Marie

2009-01-01T23:59:59.000Z

325

Intermittent Single-Molecule Interfacial Electron Transfer Dynamics...  

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

Intermittent Single-Molecule Interfacial Electron Transfer Dynamics. Intermittent Single-Molecule Interfacial Electron Transfer Dynamics. Abstract: We report on single molecule...

326

Heralded single-photon partial coherence  

Science Journals Connector (OSTI)

We study transverse spatial coherence of approximately localized single-photon states. We demonstrate nonlocal control over single-photon spatial coherence via projective measurements of an entangled twin and provide a theoretical interpretation from quantum coherence theory. Our results show that the spatial coherence of a single-photon state behaves similarly to that of a classical optical field, although the coincidence measurement adds a degree of freedom.

P. Ben Dixon; Gregory Howland; Mehul Malik; David J. Starling; R. W. Boyd; John C. Howell

2010-08-02T23:59:59.000Z

327

Heralded single-photon partial coherence  

SciTech Connect (OSTI)

We study transverse spatial coherence of approximately localized single-photon states. We demonstrate nonlocal control over single-photon spatial coherence via projective measurements of an entangled twin and provide a theoretical interpretation from quantum coherence theory. Our results show that the spatial coherence of a single-photon state behaves similarly to that of a classical optical field, although the coincidence measurement adds a degree of freedom.

Dixon, P. Ben; Howland, Gregory; Starling, David J.; Howell, John C. [Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States); Malik, Mehul [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States); Boyd, R. W. [Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States); Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

2010-08-15T23:59:59.000Z

328

Optical Precursor of a Single Photon  

SciTech Connect (OSTI)

We report the direct observation of optical precursors of heralded single photons with step- and square-modulated wave packets passing through cold atoms. Using electromagnetically induced transparency and the slow-light effect, we separate the single-photon precursor, which always travels at the speed of light in vacuum, from its delayed main wave packet. In the two-level superluminal medium, our result suggests that the causality holds for a single photon.

Zhang Shanchao; Chen, J. F.; Liu, Chang; Loy, M. M. T.; Wong, G. K. L.; Du, Shengwang [Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)

2011-06-17T23:59:59.000Z

329

Epitaxial Single Crystal Nanostructures for Batteries & PVs ...  

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

Electrode Channel Flow DEMS Cell Sulfur@Carbon Cathodes for Lithium Sulfur Batteries Better Ham & Cheese: Enhanced Anodes and Cathodes for Fuel Cells Epitaxial Single...

330

Electron transport through single carbon nanotubes  

E-Print Network [OSTI]

through single carbon nanotubes G. Chai Apollo Technologies,aligned multi-wall carbon nanotubes (CNT). Embedding of CNTsuse of fiber coated carbon nanotubes makes the handling of

Chai, G

2008-01-01T23:59:59.000Z

331

High Throughput Single Molecule Investigation of Transcription  

E-Print Network [OSTI]

Single Molecule Protein Folding in a Coaxial Mixer. Biophys.Kinetic Studies of Protein Folding. Anal. Chem. 76, 7169-Molecule Measurement of Protein Folding Kinetics . Science

Kim, Soohong

2012-01-01T23:59:59.000Z

332

Electron transport through single carbon nanotubes  

E-Print Network [OSTI]

transport through single carbon nanotubes G. Chai Apolloaligned multi-wall carbon nanotubes (CNT). Embedding of CNTsuse of fiber coated carbon nanotubes makes the handling of

Chai, G

2008-01-01T23:59:59.000Z

333

Magnetism of Single Vacancies in Rippled Graphene  

Science Journals Connector (OSTI)

Magnetism of Single Vacancies in Rippled Graphene ... Our results suggest that any magnetism induced by vacancies that occurs in graphene can be controlled by applying strain. ...

E. J. G. Santos; S. Riikonen; D. Snchez-Portal; A. Ayuela

2012-03-02T23:59:59.000Z

334

Nanometer Resolution Imaging by SIngle Molecule Switching  

SciTech Connect (OSTI)

The fluorescence intensity of single molecules can change dramatically even under constant laser excitation. The phenomenon is frequently called "blinking" and involves molecules switching between high and low intensity states.[1-3] In additional to spontaneous blinking, the fluorescence of some special fluorophores, such as cyanine dyes and photoactivatable fluorescent proteins, can be switched on and off by choice using a second laser. Recent single-molecule spectroscopy investigations have shed light on mechanisms of single molecule blinking and photoswitching. This ability to controllably switch single molecules led to the invention of a novel fluorescence microscopy with nanometer spatial resolution well beyond the diffraction limit.

Hu, Dehong; Orr, Galya

2010-04-02T23:59:59.000Z

335

Single-Molecule Fluorescence Analysis in Solution  

Science Journals Connector (OSTI)

Over the past five years, several groups have developed the capability to detect and identify single fluorescent molecules in solution as the molecules flow through a focused laser...

Keller, Richard A; Ambrose, W Patrick; Goodwin, Peter M; Jett, James H; Martin, John C; Wu, Ming

1996-01-01T23:59:59.000Z

336

Dissolution-induced surface modifications and permeability changes associated with fluid flow through an abraded saw-cut in single crystal quartz  

E-Print Network [OSTI]

-CUT IN SINGLE CRYSTAL QUARTZ A Thesis by JAMES ALBERT BOWMAN, JR. Approved as to style and content by: Brann Jo on (Co-Chairman ommittee) Thomas T. Tieh (Co-Chairman of Committee) Andrew )ash (Member) Frank Dale Morgan (Member) John H. pang (Head...-axis z-plane Figure 4. Geometrv and crystallograpiuc orienration of negative crystal developed on m-plane of quartz dissoived in a weak basic solunon. After Gratz and others (1990). 12 Profiles F F S- Slow Dissolving Plane F-Fast Dissolvmg Plane l...

Bowman, James Albert

1992-01-01T23:59:59.000Z

337

Synergy of short gamma ray burst and gravitational wave observations: Constraining the inclination angle of the binary and possible implications for off-axis gamma ray bursts  

E-Print Network [OSTI]

Compact binary mergers are the strongest candidates for the progenitors of Short Gamma Ray Bursts (SGRBs). If a gravitational wave (GW) signal from the compact binary merger is observed in association with a SGRB, such a synergy can help us understand many interesting aspects of these bursts. We examine the accuracies with which a world wide network of gravitational wave interferometers would measure the inclination angle (the angle between the angular momentum axis of the binary and the observer's line of sight) of the binary. We compare the projected accuracies of GW detectors to measure the inclination angle of double neutron star (DNS) and neutron star-black hole (NS-BH) binaries for different astrophysical scenarios. We find that a 5 detector network can measure the inclination angle to an accuracy of $\\sim 5.1 (2.2)$ degrees for a DNS(NS-BH) system at 200 Mpc if the direction of the source as well as the redshift is known electromagnetically. We argue as to how an accurate estimation of the inclination angle of the binary can prove to be crucial in understanding off-axis GRBs, the dynamics and the energetics of their jets, and help the searches for (possible) orphan afterglows of the SGRBs.

K. G. Arun; Hideyuki Tagoshi; Chandra Kant Mishra; Archana Pai

2014-12-15T23:59:59.000Z

338

Synergy of short gamma ray burst and gravitational wave observations: Constraining the inclination angle of the binary and possible implications for off-axis gamma ray bursts  

Science Journals Connector (OSTI)

Compact binary mergers are the strongest candidates for the progenitors of short gamma ray bursts (SGRBs). If a gravitational wave signal from the compact binary merger is observed in association with a SGRB, such a synergy can help us understand many interesting aspects of these bursts. We examine the accuracies with which a worldwide network of gravitational wave interferometers would measure the inclination angle (the angle between the angular momentum axis of the binary and the observers line of sight) of the binary. We compare the projected accuracies of gravitational wave detectors to measure the inclination angle of double neutron star and neutron starblack hole binaries for different astrophysical scenarios. We find that a five-detector network can measure the inclination angle to an accuracy of ?5.1 (2.2) deg for a double neutron star (neutron starblack hole) system at 200Mpc if the direction of the source as well as the redshift is known electromagnetically. We argue as to how an accurate estimation of the inclination angle of the binary can prove to be crucial in understanding off-axis GRBs, the dynamics and the energetics of their jets, and help the searches for (possible) orphan afterglows of the SGRBs.

K.?G. Arun; Hideyuki Tagoshi; Archana Pai; Chandra Kant Mishra

2014-07-22T23:59:59.000Z

339

Physics & Astronomy BSc (Single Honours Degrees)  

E-Print Network [OSTI]

138 Physics & Astronomy BSc (Single Honours Degrees) Astrophysics Physics MPhys (Single Honours in the new concourse of the School's main building. Physics&Astronomy Features * The size of the School and Astronomy degrees have been accredited by the Institute of Physics. * The University Observatory contains

Brierley, Andrew

340

Single Assessment Pass Rate South Carolina  

E-Print Network [OSTI]

Single Assessment Pass Rate South Carolina Academic Year 2004 - 2005 ETS Type of Assessment Test in Cohort 2,218 in Cohort #12;Single Assessment Pass Rate South Carolina Academic Year 2004 - 2005 ETS Type, Part 0063 Middle School Mathematics 0069 Chemistry, Physics and General Science 0070 Social Studies

Kasman, Alex

Note: This page contains sample records for the topic "megawatt single axis" 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

Mobile Robot Geometry Initialization from Single Camera  

E-Print Network [OSTI]

Mobile Robot Geometry Initialization from Single Camera Daniel Pizarro1 , Manuel Mazo1 , Enrique to achieve robot localization has been widely proposed in the area of Intelligent Spaces. Recently, an online approach that simul- taneously obtains robot's pose and its 3D structure using a single external camera has

Paris-Sud XI, Université de

342

Ames Lab 101: Single Crystal Growth  

SciTech Connect (OSTI)

Ames Laboratory scientist Deborah Schlagel talks about the Lab's research in growing single crystals of various metals and alloys. The single crystal samples are vital to researchers' understanding of the characteristics of a materials and what gives these materials their particular properties.

Schlagel, Deborah

2013-09-27T23:59:59.000Z

343

Diamond based single molecule magnetic resonance spectroscopy  

E-Print Network [OSTI]

The detection of a nuclear spin in an individual molecule represents a key challenge in physics and biology whose solution has been pursued for many years. The small magnetic moment of a single nucleus and the unavoidable environmental noise present the key obstacles for its realization. Here, we demonstrate theoretically that a single nitrogen-vacancy (NV) center in diamond can be used to construct a nano-scale single molecule spectrometer that is capable of detecting the position and spin state of a single nucleus and can determine the distance and alignment of a nuclear or electron spin pair. The proposed device will find applications in single molecule spectroscopy in chemistry and biology, such as in determining protein structure or monitoring macromolecular motions and can thus provide a tool to help unravelling the microscopic mechanisms underlying bio-molecular function.

Jianming Cai; Fedor Jelezko; Martin B. Plenio; Alex Retzker

2011-12-23T23:59:59.000Z

344

Probing Single-Molecule Protein Conformational Dynamics. | EMSL  

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

Single-Molecule Protein Conformational Dynamics. Probing Single-Molecule Protein Conformational Dynamics. Abstract: Protein conformational fluctuations and dynamics, often...

345

Clay Nanoparticle-Supported Single-Molecule FluorescenceSpectroelectr...  

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

Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry. Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry. Abstract: We...

346

Coupled dynamic analysis of multiple wind turbines on a large single floater  

Science Journals Connector (OSTI)

Abstract The present study has developed a numerical simulation tool for the coupled dynamic analysis of multiple turbines on a single floater (or Multiple Unit Floating Offshore Wind Turbine (MUFOWT)) in the time domain including multiple-turbine aero-blade-tower dynamics and control, mooring dynamics, and platform motions. The numerical tool developed in this study was designed based on and extended from the single-turbine analysis tool FAST to be suitable for multiple turbines. For hydrodynamic loadings of floating platform and mooring-line dynamics, the CHARM3D program developed by the authors was incorporated. Thus, the coupled dynamic behavior of a floating base with multiple turbines and mooring lines can be simulated in the time domain. The developed MUFOWT analysis tool can compute any type of floating platform with multiple horizontal-axis wind turbines (HAWT). To investigate the dynamic coupling effect between platform and each turbine, one turbine failure case with a fully broken blade was simulated and checked. The aerodynamic interference between adjacent turbines, including wake effect, was not considered in this study to more clearly demonstrate only the dynamic coupling. The analysis shows that some damage-induced excitations from one turbine in MUFOWT may induce appreciable changes in the performance of other turbines or the floating platform.

Y.H. Bae; M.H. Kim

2014-01-01T23:59:59.000Z

347

Magnetoelectric coupling tuned by competing single iron anisotropies in Mn1 xNixTiO3  

SciTech Connect (OSTI)

A flop of electric polarization from Pc to Pa is observed in MnTiO3 as a spin flop transtion is triggered by a c-axis magnetic field, Hc=7 T. The critical magnetic field for Pa is significantly reduced in Mn1 xNixTiO3 (x=0.33). Neutron diffraction measurements revealed similar magnetic arrangements for the two compositions where the ordered spins couple antiferromagnetically with their nearest intra- and inter-planar neighbors. In the x=0.33 system, the single ion anisotropies of Mn2+ and Ni2+ compete and give rise to an additional spin reorientation transition at TR. A magnetic field, Hc, aligns the spins along c for TRaxis for T

Chi, Songxue [ORNL; Ye, Feng [ORNL; Zhou, Haidong [ORNL; Choi, E. S. [National High Magnetic Field Laboratory (Magnet Lab), Florida; Cao, Huibo [ORNL; Hwang, J. [National High Magnetic Field Laboratory (Magnet Lab), Florida; Fernandez-Baca, Jaime A [ORNL; Hwang, J [Florida State University, Tallahassee

2014-01-01T23:59:59.000Z

348

Characterizing, predicting and  

E-Print Network [OSTI]

can increase. Offshore wind farms. Increase of power : Horns RevI : 190MW , Horns RevII : 210MW production from a single multi-megawatt wind farm. Variability of wind power depends on the time and spatial-megawatt wind farm. Variability of wind power depends on the time and spatial scale. R. Girard (Mines

349

Radial-Radial Single Rotor Turbine  

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

Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine A rotor for use in turbine applications. Available for thumbnail of Feynman Center (505) 665-9090 Email Radial-Radial Single Rotor Turbine A rotor for use in turbine applications has a radial compressor/pump having radially disposed spaced apart fins forming passages and a radial turbine having hollow turbine blades interleaved with the fins and through which fluid from the radial compressor/pump flows. The rotor can, in some applications, be used to produce electrical power. U.S. Patent No.: 7,044,718 (DOE S-100,626) Patent Application Filing Date: July 8, 2003 Patent Issue Date: May 16, 2006 Licensing Status: Available for Express Licensing (?). View terms and a sample license agreement.

350

Hanford Single-Shell Tank Integrity Program  

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

Operations Contract Hanford Single Hanford Single- -Shell Shell Hanford Single Hanford Single Shell Shell Tank Integrity Tank Integrity Program Program Herbert S Berman Herbert S Berman Herbert S. Berman Herbert S. Berman July 29, 2009 July 29, 2009 1 Page 1 Tank Operations Contract Introduction * The Hanford site's principle historic mission was plutonium production for the manufacture of nuclear weapons. * Between 1944 and 1988, the site operated nine graphite- moderated light-water production reactors to irradiate moderated, light-water, production reactors to irradiate fuel and produce plutonium. * Four large chemical separations plants were run to extract plutonium from the fuel, and a variety of laboratories, support facilities, and related infrastructure to support production

351

Press Pass - Press Release - Single top quark  

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

9-04 9-04 March 9, 2009 For immediate release Media Contacts: Judy Jackson, Fermilab, +1-630-840-3351, jjackson@fnal.gov Kurt Riesselmann, Fermilab, +1-630-840-3351, kurtr@fnal.gov Graphics and photos are available at: http://www.fnal.gov/pub/presspass/images/Single-Top-Quark-2009.html Fermilab collider experiments discover rare single top quark Batavia, Ill.-Scientists of the CDF and DZero collaborations at the Department of Energy's Fermi National Accelerator Laboratory have observed particle collisions that produce single top quarks. The discovery of the single top confirms important parameters of particle physics, including the total number of quarks, and has significance for the ongoing search for the Higgs particle at Fermilab's Tevatron, currently the world's most powerful operating particle accelerator.

352

Symmetry of single-wall nanotubes  

Science Journals Connector (OSTI)

A review of the symmetry groups of the various single-wall nano- and microtubes considered in the literature (BN, GaN, MS2, C, BC3, BC2N) is presented.

Damnjanovic, M.

2001-04-27T23:59:59.000Z

353

Spin effects in single-electron transistors  

E-Print Network [OSTI]

Basic electron transport phenomena observed in single-electron transistors (SETs) are introduced, such as Coulomb-blockade diamonds, inelastic cotunneling thresholds, the spin-1/2 Kondo effect, and Fano interference. With ...

Granger, Ghislain

2005-01-01T23:59:59.000Z

354

Single Stream Recycling Say Goodbye to Sorting  

E-Print Network [OSTI]

Single Stream Recycling Say Goodbye to Sorting Paper Please email recycle@umich.edu for more Containers Cardboard Please flatten all cardboard before placing into bin! Visit us at www.recycle

Awtar, Shorya

355

Peoples Gas Single Family Direct Install (Illinois)  

Broader source: Energy.gov [DOE]

Owners of single-family homes, condos, townhomes and two-flats may be eligible for a free installation of new programmable thermostats, pipe insulation, showerheads, and faucet aerators through...

356

Phenomenology of single and double diffraction dissociation  

E-Print Network [OSTI]

Predictions of the gap-probability renormalization model for single and double diffraction dissociation cross sections in proton-proton collisions at the LHC are presented and compared with recent CMS measurements.

Konstantin Goulianos

2013-10-21T23:59:59.000Z

357

Magnetically multiplexed heating of single domain nanoparticles  

E-Print Network [OSTI]

Selective hysteretic heating of multiple collocated types of single domain magnetic nanoparticles (SDMNPs) by alternating magnetic fields (AMFs) may offer a useful tool for biomedical applications. The possibility of ...

Romero, G.

358

Laser Ignition of Single Magnesium Particles  

Science Journals Connector (OSTI)

The minimum ignition temperature and minimum ignition energy of single magnesium particles was determined ... levitated ultrasonically and was ignited by a short laser pulse. The temperature transient of the part...

J. F. Zevenbergen; A. E. Dahoe

2000-01-01T23:59:59.000Z

359

Single-molecule kinetics of nanoparticle catalysis  

Science Journals Connector (OSTI)

Owing to their structural dispersion, the catalytic properties of nanoparticles are challenging to characterize in ensemble-averaged measurements. The single-molecule approach enables studying the catalysis of na...

Weilin Xu; Hao Shen; Guokun Liu; Peng Chen

2009-12-01T23:59:59.000Z

360

Single Molecule Probes of Lipid Membrane Structure  

E-Print Network [OSTI]

structural metrics with function in biological membranes. Single-molecule fluorescence studies were used to measure membrane structure at the molecular level. Several groups have shown that polarized total internal reflection fluorescence microscopy (PTIRF...

Livanec, Philip W.

2009-12-14T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Single-Molecule Detection with Active Transport.  

E-Print Network [OSTI]

??A glass capillary is used near the focal region of a custom-built confocal microscope to investigate the use of active transport for single-molecule detection in (more)

Ball, David Allan

2006-01-01T23:59:59.000Z

362

Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code  

SciTech Connect (OSTI)

This paper describes a recent study to investigate the applicability of a horizontal-axis wind turbine (HAWT) structural dynamics and unsteady aerodynamics analysis program (FAST and AeroDyn respectively) to modeling the forces on marine hydrokinetic (MHK) turbines. This paper summarizes the added mass model that has been added to AeroDyn. The added mass model only includes flow acceleration perpendicular to the rotor disc, and ignores added mass forces caused by blade deflection. A model of the National Renewable Energy Laboratory's (NREL) Unsteady Aerodynamics Experiment (UAE) Phase VI wind turbine was analyzed using FAST and AeroDyn with sea water conditions and the new added mass model. The results of this analysis exhibited a 3.6% change in thrust for a rapid pitch case and a slight change in amplitude and phase of thrust for a case with 30{sup o} of yaw.

Maniaci, D. C.; Li, Y.

2011-10-01T23:59:59.000Z

363

Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code: Preprint  

SciTech Connect (OSTI)

This paper describes a recent study to investigate the applicability of a horizontal-axis wind turbine (HAWT) structural dynamics and unsteady aerodynamics analysis program (FAST and AeroDyn respectively) to modeling the forces on marine hydrokinetic (MHK) turbines. It summarizes the added mass model that has been added to AeroDyn. The added mass model only includes flow acceleration perpendicular to the rotor disc, and ignores added mass forces caused by blade deflection. A model of the National Renewable Energy Laboratory's (NREL) Unsteady Aerodynamics Experiment (UAE) Phase VI wind turbine was analyzed using FAST and AeroDyn with sea water conditions and the new added mass model. The results of this analysis exhibited a 3.6% change in thrust for a rapid pitch case and a slight change in amplitude and phase of thrust for a case with 30 degrees of yaw.

Maniaci, D. C.; Li, Y.

2012-04-01T23:59:59.000Z

364

Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines  

SciTech Connect (OSTI)

When work began on the Darrieus vertical axis wind turbine (VAWT) program at Sandia National Laboratories, it was recognized that there was a paucity of symmetrical airfoil data needed to describe the aerodynamics of turbine blades. Curved-bladed Darrieus turbines operate at local Reynolds numbers (Re) and angles of attack (..cap alpha..) seldom encountered in aeronautical applications. This report describes (1) a wind tunnel test series conducted at moderate values of Re in which 0 less than or equal to ..cap alpha.. less than or equal to 180/sup 0/ force and moment data were obtained for four symmetrical blade-candidate airfoil sections (NACA-0009, -0012, -0012H, and -0015), and (2) how an airfoil property synthesizer code can be used to extend the measured properties to arbitrary values of Re (10/sup 4/ less than or equal to Re less than or equal to 10/sup 7/) and to certain other section profiles (NACA-0018, -0021, -0025).

Sheldahl, R E; Klimas, P C

1981-03-01T23:59:59.000Z

365

Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code  

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

Investigating the Influence of Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code D.C. Maniaci Pennsylvania State University Y. Li National Renewable Energy Laboratory Presented at the Oceans 11 Conference Kona, Hawaii September 19-21, 2011 Conference Paper NREL/CP-5000-52306 October 2011 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes.

366

A single power supply optoelectronic differential amplifier  

E-Print Network [OSTI]

A SINGLE POWER SUPPLY OPTOELECTRONIC DIFFERENTIAL AMPLIFIER A Thesis by YOUNGiXIIN ALBERT CHOI Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December... 1987 Major Subject: Electrical Engineering A SINGLE POWER SUPPLY OPTOELECTRONIC DIFFERENTIAL AMPLIFIER A Thesis by YOUNGMIN ALBERT CHOI Approved a. s to style and content by: He y F. aylor (Chairman of Committee) Kai Chang (Member) Ohannes...

Choi, Youngmin Albert

1987-01-01T23:59:59.000Z

367

Indistinguishable Photons from a Single Molecule  

E-Print Network [OSTI]

We report the results of coincidence counting experiments at the output of a Michelson interferometer using the zero-phonon-line emission of a single molecule at $1.4 K$. Under continuous wave excitation, we observe the absence of coincidence counts as an indication of two-photon interference. This corresponds to the observation of Hong-Ou-Mandel correlations and proves the suitability of the zero-phonon-line emission of single molecules for applications in linear optics quantum computation.

A. Kiraz; M. Ehrl; Th. Hellerer; O. E. Mustecaplioglu; C. Brauchle; A. Zumbusch

2005-05-05T23:59:59.000Z

368

Single Molecule Detection of Nanomechanical Motion  

Science Journals Connector (OSTI)

We investigate theoretically how single molecule spectroscopy techniques can be used to perform fast and high resolution displacement detection and manipulation of nanomechanical oscillators, such as singly clamped carbon nanotubes. We analyze the possibility of real time displacement detection by the luminescence signal and of displacement fluctuations by the degree of second order coherence. Estimates of the electromechanical coupling constant indicate that intriguing regimes of strong backaction between the two-level system of a molecule and the oscillator can be realized.

Vadim Puller; Brahim Lounis; Fabio Pistolesi

2013-03-19T23:59:59.000Z

369

Glauber coherence of single-electron sources  

Science Journals Connector (OSTI)

Recently demonstrated solid-state single-electron sources generate different quantum states depending on their operation condition. For adiabatic and nonadiabatic sources, we determine the Glauber correlation function in terms of the Floquet scattering matrix of the source. The correlation function provides full information on the shape of the state and on its time-dependent amplitude and phase. The coherence properties of single-electron states are therefore essential for the production of quantum multiparticle states.

G. Haack; M. Moskalets; M. Bttiker

2013-05-17T23:59:59.000Z

370

Bionanotechnology for single-cell analysis  

Science Journals Connector (OSTI)

The cell is the smallest structural unit of biological life. These microscopic systems perform functions as diverse as energy metabolism, intra- and intercellular signalling by chemical and electrical means, and self-reproduction. Thousands of different biochemical and electrical processes are simultaneously performed with the aid of nanometre-sized proteins and information stored in DNA. Multiple processes interconnect, giving rise to complicated biological phenomena. Therefore measurement of biomolecules in intact live cells provides more relevant knowledge of their physiological function than biochemical assays carried out with purified molecules in test tubes. Several measurement techniques for single-cell analysis, developed in the past decades, have the sensitivity and resolution to monitor a small number of biomolecules within a single cell. For example, with patch clamp and related techniques, one can measure electric current passing through an ion channel to study the behaviour of a single protein molecule. Electrochemical methods such as amperometry and voltammetry allow measurement of about one hundred zepto moles of oxidisable chemicals secreted from a single cell. Various fluorescence techniques reveal the dynamics of intracellular signals such as free Ca2+ in a single cell. Newer application of nanotechnological measurements with high spatio-temporal resolution on single-cell analysis is certainly a promising area of both bionanotechnology and cell biology. In this review we will introduce several experimental approaches that have contributed to our understanding of cell functions.

Duk-Su Koh; Dae Won Moon

2006-01-01T23:59:59.000Z

371

Fast recognition of single molecules based on single-event photon statistics  

SciTech Connect (OSTI)

Mandel's Q parameter, which is determined from single-event photon statistics, provides an alternative way to recognize single molecules with fluorescence detection, other than the second-order correlation function. It is shown that the Q parameter of an assumed ideal double-molecule fluorescence with the same average photon number as that of the sample fluorescence can act as the criterion for single-molecule recognition. The influence of signal-to-background ratio and the error estimates for photon statistics are also presented. We have applied this method to ascertain single Cy5 dye molecules within hundreds of milliseconds.

Dong Shuangli; Huang Tao; Liu Yuan; Wang Jun; Zhang Guofeng; Xiao Liantuan; Jia Suotang [State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, 030006 (China)

2007-12-15T23:59:59.000Z

372

Pseudo-Single-Bunch Expands Experimental Scope  

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

Pseudo-Single-Bunch Expands Experimental Scope Print Pseudo-Single-Bunch Expands Experimental Scope Print Initial tests of a new pseudo-single-bunch (PSB) operational mode at the ALS have shown promising results-PSB would vastly expand the facility's capacity to carry out dynamics and time-of-flight experiments with a major reduction in sample damage. In PSB operation, a single electron bunch is displaced transversely from the other electron bunches circulating in the storage ring. Experiments that require light emitted only from a single bunch can stop the light emitted from the other bunches using a collimator. Other beamlines would only see a small reduction in flux due to the displaced bunch. As a result, PSB complements the scheduling of multibunch and timing experiments-currently, the ALS only offers these capabilities for four weeks out of its yearly operating schedule. With PSB operation, the ability to conduct time-of-flight experiments could be available year-round.

373

Pseudo-Single-Bunch Expands Experimental Scope  

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

Pseudo-Single-Bunch Expands Experimental Scope Print Pseudo-Single-Bunch Expands Experimental Scope Print Initial tests of a new pseudo-single-bunch (PSB) operational mode at the ALS have shown promising results-PSB would vastly expand the facility's capacity to carry out dynamics and time-of-flight experiments with a major reduction in sample damage. In PSB operation, a single electron bunch is displaced transversely from the other electron bunches circulating in the storage ring. Experiments that require light emitted only from a single bunch can stop the light emitted from the other bunches using a collimator. Other beamlines would only see a small reduction in flux due to the displaced bunch. As a result, PSB complements the scheduling of multibunch and timing experiments-currently, the ALS only offers these capabilities for four weeks out of its yearly operating schedule. With PSB operation, the ability to conduct time-of-flight experiments could be available year-round.

374

Pseudo-Single-Bunch Expands Experimental Scope  

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

Pseudo-Single-Bunch Expands Experimental Scope Print Pseudo-Single-Bunch Expands Experimental Scope Print Initial tests of a new pseudo-single-bunch (PSB) operational mode at the ALS have shown promising results-PSB would vastly expand the facility's capacity to carry out dynamics and time-of-flight experiments with a major reduction in sample damage. In PSB operation, a single electron bunch is displaced transversely from the other electron bunches circulating in the storage ring. Experiments that require light emitted only from a single bunch can stop the light emitted from the other bunches using a collimator. Other beamlines would only see a small reduction in flux due to the displaced bunch. As a result, PSB complements the scheduling of multibunch and timing experiments-currently, the ALS only offers these capabilities for four weeks out of its yearly operating schedule. With PSB operation, the ability to conduct time-of-flight experiments could be available year-round.

375

Nonlinear interaction between two heralded single photons  

E-Print Network [OSTI]

Harnessing nonlinearities strong enough to allow two single photons to interact with one another is not only a fascinating challenge but is central to numerous advanced applications in quantum information science. Currently, all known approaches are extremely challenging although a few have led to experimental realisations with attenuated classical laser light. This has included cross-phase modulation with weak classical light in atomic ensembles and optical fibres, converting incident laser light into a non-classical stream of photon or Rydberg blockades as well as all-optical switches with attenuated classical light in various atomic systems. Here we report the observation of a nonlinear parametric interaction between two true single photons. Single photons are initially generated by heralding one photon from each of two independent spontaneous parametric downconversion sources. The two heralded single photons are subsequently combined in a nonlinear waveguide where they are converted into a single photon with a higher energy. Our approach highlights the potential for quantum nonlinear optics with integrated devices, and as the photons are at telecom wavelengths, it is well adapted to applications in quantum communication.

T. Guerreiro; A. Martin; B. Sanguinetti; J. S. Pelc; C. Langrock; M. M. Fejer; N. Gisin; H. Zbinden; N. Sangouard; R. T. Thew

2014-03-09T23:59:59.000Z

376

Room temperature in-plane ?100? magnetic easy axis for Fe{sub 3}O{sub 4}/SrTiO{sub 3}(001):Nb grown by infrared pulsed laser deposition  

SciTech Connect (OSTI)

We examine the magnetic easy-axis directions of stoichiometric magnetite films grown on SrTiO{sub 3}:Nb by infrared pulsed-laser deposition. Spin-polarized low-energy electron microscopy reveals that the individual magnetic domains are magnetized along the in-plane ?100? film directions. Magneto-optical Kerr effect measurements show that the maxima of the remanence and coercivity are also along in-plane ?100? film directions. This easy-axis orientation differs from bulk magnetite and films prepared by other techniques, establishing that the magnetic anisotropy can be tuned by film growth.

Monti, Matteo; Sanz, Mikel; Oujja, Mohamed; Rebollar, Esther; Castillejo, Marta; Marco, Jos F.; Figuera, Juan de la, E-mail: juan.delafiguera@iqfr.csic.es [Instituto de Qumica Fsica Rocasolano, CSIC, Madrid E-28006 (Spain); Pedrosa, Francisco J.; Bollero, Alberto [IMDEA Nanociencia, Instituto Madrileo de Estudios Avanzados en Nanociencia, Madrid E-28049 (Spain); Camarero, Julio; Cuado, Jose Luis F. [IMDEA Nanociencia, Instituto Madrileo de Estudios Avanzados en Nanociencia, Madrid E-28049 (Spain); Dpto. de Fsica de la Materia Condensada, Universidad Autnoma de Madrid, Madrid E-28049 (Spain); Nemes, Norbert M. [Dpto. de Fsica Aplicada III, Universidad Complutense de Madrid, Madrid E-28040 (Spain); Mompean, Federico J.; Garcia-Hernndez, Mar [Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid E-28049 (Spain); Nie, Shu; McCarty, Kevin F. [Sandia National Laboratories, Livermore, California 94550 (United States); N'Diaye, Alpha T.; Chen, Gong; Schmid, Andreas K. [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

2013-12-14T23:59:59.000Z

377

Tools for Single-Molecule Sequence Detection and Manipulation  

E-Print Network [OSTI]

J. & Smith, D. E. Single-molecule studies of DNA mechanics.polymer physics at the single-molecule level. Phil. Trans.Block, S. High-Resolution, Single-Molecule Measurements of

Zohar, Hagar

2011-01-01T23:59:59.000Z

378

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

carbon nanotubes as single-molecule biosensors. Nano Lett.1990). S.N. Xie: Single-molecule approach to enzymology.improvements to the single molecule oxidation of carbon

Collins, Philip G

2008-01-01T23:59:59.000Z

379

Single Molecule and Synthetic Biology Studies of Transcription  

E-Print Network [OSTI]

R.J. et al. Single-molecule study of transcriptional pausingBustamante, C. Single molecule transcription elongation.RNA polymerase. A single-molecule view of the transcription

Zamft, Bradley Michael

2011-01-01T23:59:59.000Z

380

Single-molecule reactions and spectroscopy via vibrational excitation  

Science Journals Connector (OSTI)

...J. Kelly and R. E. Palmer Single-molecule reactions and spectroscopy via...Inelastic Tunnelling|Vibration|Single Molecule|Scanning Tunnelling Microscopy (Stm)| Single-molecule reactions and spectroscopy via...

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Single-molecule studies of DNA dynamics and intermolecular forces  

E-Print Network [OSTI]

forces imposed on a single molecule in a concentratedOF THE DISSERTATION Single-Molecule Studies of DNA DynamicsRecently developed single-molecule techniques, which allow

Robertson, Rae Marie

2007-01-01T23:59:59.000Z

382

Single-Molecule Lysozyme Dynamics Monitored by an Electronic Circuit  

E-Print Network [OSTI]

Chem. B 38. S. N. Xie, Single Molecules 2, 229 (2001). 39.Technol. 26, 1338 (2010). Single-Molecule Lysozyme Dynamicsprobe the dynamics of single molecules (1) and overcome the

Collins, Philip G

2012-01-01T23:59:59.000Z

383

Biology and polymer physics at the singlemolecule level  

Science Journals Connector (OSTI)

...Olmsted Biology and polymer physics at the single-molecule level Steven Chu Department of Physics...be hidden from view can be clearly seen in single-molecule experiments. single-molecule biology|polymer dynamics|biological physics...

2003-01-01T23:59:59.000Z

384

Optimal Statistical Methods for Analysis of Single-Molecule Data  

E-Print Network [OSTI]

5 Application to Single Molecule Trajectories 5.1 Maximum13 Methods and Materials 13.1 A server-based single-moleculeto-End Distance on Single-Molecule Experi- ment Time Scales

Watkins, Lucas

2009-01-01T23:59:59.000Z

385

Chiral tunneling in single and bilayer graphene  

E-Print Network [OSTI]

We review chiral (Klein) tunneling in single-layer and bilayer graphene and present its semiclassical theory, including the Berry phase and the Maslov index. Peculiarities of the chiral tunneling are naturally explained in terms of classical phase space. In a one-dimensional geometry we reduced the original Dirac equation, describing the dynamics of charge carriers in the single layer graphene, to an effective Schr\\"odinger equation with a complex potential. This allowed us to study tunneling in details and obtain analytic formulas. Our predictions are compared with numerical results. We have also demonstrated that, for the case of asymmetric n-p-n junction in single layer graphene, there is total transmission for normal incidence only, side resonances are suppressed.

T. Tudorovskiy; K. J. A. Reijnders; M. I. Katsnelson

2011-06-15T23:59:59.000Z

386

What are single photons good for?  

E-Print Network [OSTI]

In a long-held preconception, photons play a central role in present-day quantum technologies. But what are sources producing photons one by one good for precisely? Well, in opposition to what many suggest, we show that single-photon sources are not helpful for point to point quantum key distribution because faint laser pulses do the job comfortably. However, there is no doubt about the usefulness of sources producing single photons for future quantum technologies. In particular, we show how single-photon sources could become the seed of a revolution in the framework of quantum communication, making the security of quantum key distribution device independent or extending quantum communication over many hundreds of kilometers. Hopefully, these promising applications will provide a guideline for researchers to develop more and more efficient sources, producing narrowband, pure and indistinguishable photons at appropriate wavelengths.

Nicolas Sangouard; Hugo Zbinden

2012-02-02T23:59:59.000Z

387

Single molecule studies of DNA mismatch repair  

Science Journals Connector (OSTI)

Abstract DNA mismatch repair, which involves is a widely conserved set of proteins, is essential to limit genetic drift in all organisms. The same system of proteins plays key roles in many cancer related cellular transactions in humans. Although the basic process has been reconstituted in vitro using purified components, many fundamental aspects of DNA mismatch repair remain hidden due in part to the complexity and transient nature of the interactions between the mismatch repair proteins and DNA substrates. Single molecule methods offer the capability to uncover these transient but complex interactions and allow novel insights into mechanisms that underlie DNA mismatch repair. In this review, we discuss applications of single molecule methodology including electron microscopy, atomic force microscopy, particle tracking, FRET, and optical trapping to studies of DNA mismatch repair. These studies have led to formulation of mechanistic models of how proteins identify single base mismatches in the vast background of matched DNA and signal for their repair.

Dorothy A. Erie; Keith R. Weninger

2014-01-01T23:59:59.000Z

388

Development of single crystal filaments. Final report  

SciTech Connect (OSTI)

The program just completed addresses a route to a more efficient longer-lasting electric light bulb filament. All current filaments for light bulbs are metallic in nature. They are subject to embrittlement with age (large grain growth) and relatively high vapor pressures which limits their operating temperature. There is evidence which suggests advantages to using high temperature refractory single crystal fibers as a filament for a light bulb. These refractory materials may include materials such as hafnium or tantalum carbide which have melting points about 500{degrees}C higher than tungsten. Another advantage is that single crystal fibers have a very high degree of crystalline perfection with very few voids and dislocations. Without these imperfections, the atomic mobility at high temperatures is highly restricted. Thus single crystal fibers are very stable at high temperature and will last longer. The efficiencies result from running these single crystal ceramic fiber filaments at higher temperatures and the higher emissivity of the carbide filaments compared to tungsten. The amount of visible light is proportional to the 4the power of the temperature thus a 500{degrees}C higher operating give about a 3-fold increase in radiation in the visible range. The program accomplishments can be summarized as follows: (1) Single crystal fibers of JfC sufficient crystal quality for light bulb filament applications were made. (2) The HfC fiber furnace growth chamber, power control and data collection system was developed for the laboratory scale plant. (3) method for mounting and apparatuses for testing the single crystal fiber filaments were developed and built.

Milewski, J.V.; Shoultz, R.A.; Bourque-McConnell, M.M.

1995-04-01T23:59:59.000Z

389

Coherent Perfect Absorption of Single Photons  

E-Print Network [OSTI]

We examine the question of coherent perfect absorption (CPA) of single photons, and more generally, of the quantum fields. We show the CPA of path entangled single photons in a Fabry-Perot interferometer containing an absorptive medium. The frequency of perfect absorption can be controlled by changing the interferometer parameters like the reflectivity and the complex dielectric constant of the material. We exhibit similar results for path entangled photons in micro-ring resonators. For entangled fields like the ones produced by a down converter the CPA aspect is evident in phase sensitive detection schemes such as in measurements of the squeezing spectrum.

Huang, Sumei

2014-01-01T23:59:59.000Z

390

Hydrogenation of single-walled carbon nanotubes  

E-Print Network [OSTI]

Towards the development of a useful mechanism for hydrogen storage, we have studied the hydrogenation of single-walled carbon nanotubes with atomic hydrogen using core-level photoelectron spectroscopy and x-ray absorption spectroscopy. We find that atomic hydrogen creates C-H bonds with the carbon atoms in the nanotube walls and such C-H bonds can be com-pletely broken by heating to 600 oC. We demonstrate approximately 65+/-15 at % hydrogenation of carbon atoms in the single-walled carbon nanotubes which is equivalent to 5.1+/-1.2 weight % hydrogen capacity. We also show that the hydrogenation is a reversible process.

Anton Nikitin; Hirohito Ogasawara; David Mann; Reinhard Denecke; Zhiyong Zhang; Hongjie Dai; KJ Cho; Anders Nilsson

2005-10-14T23:59:59.000Z

391

Electronic conduction through single crystals of polyethylene  

E-Print Network [OSTI]

May, 1966 Major Subjects Physics ELECTRONIC CONDUCTION THROUGH SINGLE CRYSTRLS OF POLYETHYLENE k Thesis By Gerald Maurice Samson Approved as to style and content by: naen of the Committee ad of the D artment ber ber c- The autho. u... talc o Polyot! ylone . -y, i'oo Gerald !':cur"' co Samson Directed by: Zr. Joe S. The predominant conduction mechani m through single cryo' mls op polyethylene is shown to be Schott!cy ( hernal) oui "sion . or tompora- o tu. es - bove 0 C. . "or...

Samson, Gerald Maurice

1966-01-01T23:59:59.000Z

392

Ghost imaging with a single detector  

SciTech Connect (OSTI)

We experimentally demonstrate pseudothermal ghost imaging and ghost diffraction using only a single detector. We achieve this by replacing the high-resolution detector of the reference beam with a computation of the propagating field, following a recent proposal by Shapiro [Phys. Rev. A 78, 061802(R) (2008)]. Since only a single detector is used, this provides experimental evidence that pseudothermal ghost imaging does not rely on nonlocal quantum correlations. In addition, we show the depth-resolving capability of this ghost imaging technique.

Bromberg, Yaron; Katz, Ori; Silberberg, Yaron [Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100 (Israel)

2009-05-15T23:59:59.000Z

393

A single ion inside a miniature cavity  

E-Print Network [OSTI]

understanding of nature. For instance, Joseph von Fraunhofers observation of absorption-lines in the optical spectrum of the Sun was crucial for the development of Rydbergs formula and Bohrs atomic model. However, under normal conditions the light... the prescribed word limit of 60000 words. Abstract A Single Ion Inside a Miniature Cavity This thesis describes the first experimentally achieved coupling of a single atomic ion to an optical fibre-cavity as well as the first photonic interaction between a...

Steiner, Matthias

2014-04-08T23:59:59.000Z

394

Life at the Single Molecule Level  

SciTech Connect (OSTI)

In a living cell, gene expressionthe transcription of DNA to messenger RNA followed by translation to proteinoccurs stochastically, as a consequence of the low copy number of DNA and mRNA molecules involved. Can one monitor these processes in a living cell in real time? How do cells with identical genes exhibit different phenotypes? Recent advances in single-molecule imaging in living bacterial cells allow these questions to be answered at the molecular level in a quantitative manner. It was found that rare events of single molecules can have important biological consequences.

Xie, Xiaoliang Sunny (Harvard) [Harvard

2011-03-04T23:59:59.000Z

395

Medial Axis Local Planner: Local Planning for Medial Axis Roadmaps  

E-Print Network [OSTI]

implemented this local planner and have tested it in 2D and 3D rigid body and 8D and 16D fixed base articulated linkage environments. We compare MALP with a straight-line local planner (SL), a typical local planer used in motion planning that interpolated...

Manavi, Kasra Mehron

2012-07-16T23:59:59.000Z

396

Reduction of single-photon emission from a single-emitter system by intersystem crossing  

Science Journals Connector (OSTI)

We investigate the reduction in the probability of single-photon emission from a single-emitter system caused by intersystem crossing. The physical model is that a single-emitter system with three levels is excited by a square pulse laser, and then a single photon is emitted at a controllable time. We find that the intersystem crossing always reduces the probability of single-photon emission. We obtain quantitative and analytical expressions for the probabilities of zero-, one-, and two-photon emission and Mandel's Q parameter as the function of the intersystem crossing rate under the conditions of finite field strength and finite interaction time with the laser pulse. We discuss the conditions for obtaining the maximal probability of single-photon emission in the presence of intersystem crossing. We find that one can obtain a high probability of single-photon emission from the single-emitter system using square pulse excitation in comparison with continuous wave excitation. Mandel's Q parameter exhibits a transition from a sub-Poissonian behavior to a super-Poissonian behavior due to the influence of intersystem crossing. The calculated Mandel's Q parameter and second-order correlation function of photon emission considering the coherent effect are in better agreement with the experimental data.

Yong He and Lin Dai

2014-01-28T23:59:59.000Z

397

Standard Work Specifications for Single-Family Home Energy Upgrades...  

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

for Single-Family Home Energy Upgrades to define the minimum requirements for high- quality residential energy upgrades. The Standard Work Specifications for Single-Family...

398

Single Supported Atoms Participate in Catalytic Processes | ornl...  

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

Functional Materials for Energy Single Supported Atoms Participate in Catalytic Processes December 04, 2014 Pathways for NO oxidation on single Pt atoms supported on the (010)...

399

Transient Dynamometer Testing of a Single Leg NOx Adsorber Combined...  

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

Transient Dynamometer Testing of a Single Leg NOx Adsorber Combined with a Fuel Processor for Enhanced NOx Control Transient Dynamometer Testing of a Single Leg NOx Adsorber...

400

Payer source for single, elderly women in nursing homes.  

E-Print Network [OSTI]

?? This study seeks to determine the payer source for single, elderly women in nursing homes. By determining the payer source for single, elderly women, (more)

Nakagawa, Sage

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Single-step conversion of cellulose to 5-hydroxymethylfurfural...  

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

Single-step conversion of cellulose to 5-hydroxymethylfurfural (HMF), a versatileplatform chemical. Single-step conversion of cellulose to 5-hydroxymethylfurfural (HMF), a...

402

Single-molecule imaging studies of protein dynamics.  

E-Print Network [OSTI]

??Single-molecule fluorescence imaging is a powerful method for studying biological events. The work of this thesis primarily focuses on single molecule studies of the dynamics (more)

Zareh, Shannon Kian

2011-01-01T23:59:59.000Z

403

Factors Affecting HCCI Combustion Phasing for Fuels with Single...  

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

Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry Factors Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry 2004...

404

Triple-axis X-ray Reciprocal Space Mapping of In(y)Ga(1-y)As Thermophotovoltaic Diodes Grown on (100) InP Substrates  

SciTech Connect (OSTI)

Analysis of the composition, strain-relaxation, layer-tilt, and the crystalline quality of In{sub y}Ga{sub 1-y}As/InP{sub 1-x}As{sub x} thermophotovoltaic (TPV) diodes grown by metal organic vapor phase epitaxy (MOVPE) is demonstrated using triple-axis x-ray reciprocal space mapping techniques. In{sub 0.53}Ga{sub 0.47}As (E{sub gap} = 0.74eV) n/p junction diodes are grown lattice matched (LM) to InP substrates and lattice mismatched (LMM) In{sub 0.67}Ga{sub 0.33}As (E{sub gap} = 0.6eV) TPV diodes are grown on three-step InP{sub 1-x}As{sub x} (0 < x < 0.32) buffer layers on InP substrates. X-ray reciprocal space maps about the symmetric (400) and asymmetric (533) reciprocal lattice points (RELPs) determine the in-plane and out-of-plane lattice parameters and strain of the In{sub y}Ga{sub 1-y}As TPV active layer and underlying InP{sub 1-x}As{sub x} buffers. Triple-axis x-ray rocking curves about the LMM In{sub 0.67}Ga{sub 0.33}As RELP show an order of magnitude increase of its full width at half maximum (FWHM) compared to that from the LM In{sub 0.53}Ga{sub 0.47}As (250asec vs. 30asec). Despite the significant RELP broadening the photovoltaic figure of merits show that the electronic quality of the LMM In{sub 0.67}Ga{sub 0.33}As approaches that of the lattice matched diode material. This indicates that misfit-related crystalline imperfections are not dominating the photovoltaic response of the optimized LMM In{sub 0.67}Ga{sub 0.33}As material compared with the intrinsic recombination processes and/or recombination through native point defects which would be present in both LMM and LM diode material. However, additional RELP broadening in non-optimized LMM In{sub 0.67}Ga{sub 0.33}As n/p junction diodes does correspond to significant degradation of TPV diode open circuit voltage and minority carrier lifetime demonstrating that there is correlation between x-ray FWHM and the electronic performance of the LMM TPV diodes.

M Dashiell; H Ehsani; P Sander; F Newman; C Wang; Z Shellenbarger; D Donetski; N Gu; S Anikeev

2006-02-16T23:59:59.000Z

405

Controlling the quantum state of a single photon emitted from a single polariton  

SciTech Connect (OSTI)

We investigate in detail the optimal conditions for a high fidelity transfer from a single-polariton state to a single-photon state and subsequent homodyne detection of the single photon. We assume that, using various possible techniques, the single polariton has initially been stored as a spin-wave grating in a cloud of cold atoms inside a low-finesse cavity. This state is then transferred to a single-photon optical pulse using an auxiliary beam. We optimize the retrieval efficiency and determine the mode of the local oscillator that maximizes the homodyne efficiency of such a photon. We find that both efficiencies can have values close to one in a large region of experimental parameters.

Stanojevic, Jovica; Parigi, Valentina; Bimbard, Erwan; Tualle-Brouri, Rosa; Ourjoumtsev, Alexei; Grangier, Philippe [Laboratoire Charles Fabry, Institut d'Optique, CNRS, Universite Paris-Sud, Campus Polytechnique, RD 128, FR-91127 Palaiseau cedex (France)

2011-11-15T23:59:59.000Z

406

Symmetry groups of single-wall nanotubes  

Science Journals Connector (OSTI)

An approach to the determination of the symmetry groups of structural analogs of single-wall carbon nanotubes using ideas in color symmetry theory is described. The line group structures of the symmetry groups of BN, BC3, BCN and BC2N nanotubes are identified. An extension of the method to address nanotubes with non-hexagonal symmetry is also presented.

De Las Pe?as, M.L.A.N.

2013-11-26T23:59:59.000Z

407

Single Assessment Pass Rate South Carolina  

E-Print Network [OSTI]

Single Assessment Pass Rate South Carolina Academic Year 2000 - 2001 ETS Type of Assessment Test Code Total Pass % Pass Total Pass % Pass Academic Content Area Education in the Elementary School 0010., & Comp.: Essays 0042 Mathematics 0060 1 1 100% 47 45 96% Chemistry, Physics and General Science 0070 5 3

Kasman, Alex

408

Nano-soldering to single atomic layer  

DOE Patents [OSTI]

A simple technique to solder submicron sized, ohmic contacts to nanostructures has been disclosed. The technique has several advantages over standard electron beam lithography methods, which are complex, costly, and can contaminate samples. To demonstrate the soldering technique graphene, a single atomic layer of carbon, has been contacted, and low- and high-field electronic transport properties have been measured.

Girit, Caglar O. (Berkeley, CA); Zettl, Alexander K. (Kensington, CA)

2011-10-11T23:59:59.000Z

409

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 67 #12;MATLAB Parallel MATLAB sets up one special agent called the client. MATLAB sets up the requested number of workers, each

Crawford, T. Daniel

410

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 67 #12;Matlab Parallel ( 'myscript', 'Profile', ... 'ithaca_R2012a', 'matlabpool', 7 ) 5 / 67 #12;SPMD: The SPMD Environment Matlab

Crawford, T. Daniel

411

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff: Advanced Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 69 #12;Matlab ( 'myscript', 'Profile', ... 'ithaca_R2012a', 'matlabpool', 7 ) 5 / 69 #12;SPMD: The SPMD Environment Matlab

Crawford, T. Daniel

412

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 66 #12;MATLAB Parallel MATLAB sets up one special worker called the client. MATLAB sets up the requested number of workers, each

Crawford, T. Daniel

413

RISING ECONOMIC INSECURITY AMONG SENIOR SINGLE WOMEN  

E-Print Network [OSTI]

RISING ECONOMIC INSECURITY AMONG SENIOR SINGLE WOMEN Tatjana Meschede Martha Cronin Laura Sullivan paying bills, forgoing home maintenance or medical needs. New research shows that economic insecurity of the Great Recession had been felt--economic insecurity among this population subgroup increased by one

Snider, Barry B.

414

Electro-Optic Modulation of Single Photons  

E-Print Network [OSTI]

We use the Stokes photon of a biphoton pair to set the time origin for electro-optic modulation of the wave function of the anti-Stokes photon thereby allowing arbitrary phase and amplitude modulation. We demonstrate conditional single-photon wave functions composed of several pulses, or instead, having gaussian or exponential shapes.

Pavel Kolchin; Chinmay Belthangady; Shengwang Du; G. Y. Yin; S. E. Harris

2008-08-02T23:59:59.000Z

415

Nano-optics with single quantum systems  

Science Journals Connector (OSTI)

...April 2004 research-article Theme Issue Nano-optics and near-field microscopy compiled by David Richards and Anatoly Zayats Nano-optics with single quantum systems This...fluorescent molecules, as local probes for nano-optical field distributions. We start...

2004-01-01T23:59:59.000Z

416

Triangular-profile single-mode fiber  

Science Journals Connector (OSTI)

A low-loss triangular-profile single-mode fiber is reported. The fiber loss at 1.31.55-?m wavelengths is below 0.4 dB/km, and its zero-chromatic-dispersion wavelength is 1.402 ?m.

Saifi, M A; Cohen, L G; Stone, J; Jang, S J

1982-01-01T23:59:59.000Z

417

Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review  

Science Journals Connector (OSTI)

The energy in flowing river streams, tidal currents or other artificial water channels is being considered as viable source of renewable power. Hydrokinetic conversion systems, albeit mostly at its early stage of development, may appear suitable in harnessing energy from such renewable resources. A number of resource quantization and demonstrations have been conducted throughout the world and it is believed that both in-land water resources and offshore ocean energy sector will benefit from this technology. In this paper, starting with a set of basic definitions pertaining to this technology, a review of the existing and upcoming conversion schemes, and their fields of applications are outlined. Based on a comprehensive survey of various hydrokinetic systems reported to date, general trends in system design, duct augmentation, and placement methods are deduced. A detailed assessment of various turbine systems (horizontal and vertical axis), along with their classification and qualitative comparison, is presented. In addition, the progression of technological advancements tracing several decades of R&D efforts are highlighted.

M.J. Khan; G. Bhuyan; M.T. Iqbal; J.E. Quaicoe

2009-01-01T23:59:59.000Z

418

Gamma Bang Time/Reaction History Diagnostics for the National Ignition Facility (NIF) Using 90-degree Off-axis Parabolic Mirrors  

SciTech Connect (OSTI)

Gas Cherenkov detectors (GCD) have been used to convert fusion gamma into photons to achieve gamma bang time (GBT) and reaction history measurements. The GCD designed for Omega used Cassegrain reflector optics in order to fit inside a ten-inch manipulator. A novel design for the National Ignition Facility (NIF) using 90 Off-Axis Parabolic (OAP) mirrors will increase light collection efficiency from fusion gammas and achieve minimum time dispersion. The broadband Cherenkov light (from 200 to 800 nm) is relayed into a high-speed detector using three parabolic mirrors. Because light is collected from many source planes throughout the CO2 gas volume, the detector is positioned at the stop position rather than an image position. The stop diameter and its position are independent of the light-generation location along the gas cell. The current design collects light from a 100-mm diameter by 500-mm-long gas volume. Optical ray tracings demonstrate how light can be collected from different angled trajectories of the Compton electrons as they fly through the CO2 gas volume. A cluster of four channels will allow for increased dynamic range as well as different gamma energy threshold sensitivities. 52.70.La, 29.40.Ka, 42.15.Eq, 07.60.-j, 07.85.-m

H.W. Herrmann, R.M. Malone, W. Stoeffl, J.M. Mack, C.S. Young

2008-06-01T23:59:59.000Z

419

In Situ Observation of the Electrochemical Lithiation of a Single SnO2 Nanowire Electrode  

SciTech Connect (OSTI)

We report the first real-time transmission electron microscopy (TEM) observations of the structural evolution and phase transformation of lithium-ion battery anode during the battery charging process. A nanobattery consisting of a single SnO2 nanowire anode and an ionic liquid electrolyte was successfully constructed in a TEM. We observed that during the charging process, the SnO2 crystal was converted to Li2O glass with LixSn nanocrystalline precipitates as the reaction front propagated progressively along the nanowire. After the reaction front passed, the nanowire showed swelling, elongation, and large off-axis distortion (spiraling). Upon completion of the electrochemical charging, the nanowire showed up to 120% elongation and a 30% increase in diameter with a volume expansion of about 272%. The charging front, which separates the reacted and unreacted sections of the nanowire, contains a high density of mobile dislocations, which are continuously nucleated and annihilated at the moving reaction front. This dislocation cloud indicates large in-plane misfit stresses, and serves as structural precursor to the eventual complete solid-state amorphization. The rate of charging in our nanobatteries is found to be proportional to the inverse square root of nanowire length, indicating that a standalone nanobattery or integrated arrays of nanobatteries should have kinetic advantage over conventional battery design. The present observations also provide important mechanistic insights for the design of advanced batteries with improved performance and lifetime for broad electrical energy storage applications.

Huang, J. Y.; Zhong, Li; Wang, Chong M.; Sullivan, John P.; Xu, Wu; Zhang, Li Q.; Mao, Scott; Hudak, N.; Liu, Xiao H.; Subramanian, Arun Kumar; Fan, Hongyou; Qi, Liang; Kushima, Akihiro; Li, Ju

2010-11-18T23:59:59.000Z

420

Polarized Neutron Studies on Antiferromagnetic Single Crystals: Technical Report No. 4  

DOE R&D Accomplishments [OSTI]

The theory of neutron scattering by magnetic crystals as given by Halpern and Johnson predicts changes in the polarization state of the neutron beam upon scattering which depend upon the relative orientation of the neutron polarization vector and the crystal magnetic axis. This was investigated experimentally with a polarized beam spectrometer using single crystals of Cr{sub 2}O{sub 3} and alpha - Fe{sub 2}O{sub 3} in which reside unique antiferromagnetic axes. Studies were made on several different reflections in both crystals for a number of different temperatures both below and above the Neel point. Results support the theoretical predictions and indicate directions for the moments in these crystals consistent with previous work. A more detailed study of the polarization changes in the (111) reflection in alpha - Fe{sub 2}O{sub 3} at room temperature on application of a magnetic field was carried out, The results indicate that the principal source of the parasitic ferromagnetism in hematite is essentially independent of the orientation of the antiferromagnetic domains within the crystal.

Nathans, R.; Riste, T.; Shirane, G.; Shull, C.G.

1958-11-26T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Upping fluorescence Paving the way for single-molecule medical  

E-Print Network [OSTI]

Upping fluorescence ­ Paving the way for single-molecule medical sensors The presence to the information content of single molecule fluorescence measurement[2]. Ideally, a single fluorophore should last in the collection of data at the single-molecule level where oxygen efficiently reduces the fluorescence lifetime

Strathclyde, University of

422

Single-Molecule Spectroscopy DOI: 10.1002/anie.201105388  

E-Print Network [OSTI]

Single-Molecule Spectroscopy DOI: 10.1002/anie.201105388 Single-Particle and Ensemble Diffusivities different approaches. The data obtained through the direct observation of dye molecule diffusion by single) with single-molecule sensitivity has recently provided us with a totally new view of diffusion

Ulm, Universität

423

Single-Molecule Spectroscopy DOI: 10.1002/ange.201105388  

E-Print Network [OSTI]

Single-Molecule Spectroscopy DOI: 10.1002/ange.201105388 Single-Particle and Ensemble Diffusivities different approaches. The data obtained through the direct observation of dye molecule diffusion by single) with single-molecule sensitivity has recently provided us with a totally new view of diffusion

Ulm, Universität

424

ccsd00001150 Getting DNA twist rigidity from single molecule  

E-Print Network [OSTI]

ccsd­00001150 (version 1) : 17 Feb 2004 Getting DNA twist rigidity from single molecule experiments to study the extension versus rotation diagrams of single supercoiled DNA molecules. We reproduce single DNA molecules in order to test their mechanical properties. A #12;rst way to manipulate a single

425

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

426

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

427

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

428

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

429

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

430

Method for preparation of single chain antibodies  

DOE Patents [OSTI]

This invention provides a method for identifying cells expressing a target single chain antibody (scFv) directed against a target antigen from a collection of cells that includes cells that do not express the target scFv, comprising the step of combining the collection of cells with an anti-idiotype directed to an antibody specific for the target antigen and detecting interaction, if any, of the anti-idiotype with the cells, wherein the occurrence of an interaction identifies the cell as one which expresses the target scFv. This invention also provides a method for making a single chain antibody (scFv) directed against an antigen, wherein the selection of clones is made based upon interaction of those clones with an appropriate anti-idiotype, and heretofore inaccessible scFv so made. This invention provides the above methods or any combination thereof. Finally, this invention provides various uses of these methods.

Cheung, Nai-Kong V. (New York, NY); Guo, Hong-fen (New York, NY)

2012-04-03T23:59:59.000Z

431

Single chain elasticity and thermoelasticity of polyethylene  

E-Print Network [OSTI]

Single-chain elasticity of polyethylene at $\\theta$ point up to 90% of stretching with respect to its contour length is computed by Monte-Carlo simulation of an atomistic model in continuous space. The elasticity law together with the free-energy and the internal energy variations with stretching are found to be very well represented by the wormlike chain model up to 65% of the chain elongation, provided the persistence length is treated as a temperature dependent parameter. Beyond this value of elongation simple ideal chain models are not able to describe the Monte Carlo data in a thermodynamic consistent way. This study reinforces the use of the wormlike chain model to interpret experimental data on the elasticity of synthetic polymers in the finite extensibility regime, provided the chain is not yet in its fully stretched regime. Specific solvent effects on the elasticity law and the partition between energetic and entropic contributions to single chain elasticity are investigated.

John T. Titantah; Carlo Pierleoni; Jean-Paul Ryckaert

2002-09-05T23:59:59.000Z

432

Annealing of single lamella nanoparticles of polyethylene  

E-Print Network [OSTI]

We study the change of the size and structure of freely suspended single lamella nanoparticles of polyethylene during thermal annealing in aqueous solutions. Using small-angle x-ray scattering and cryogenic transmission electron microscopy, it is shown that a doubling of the crystalline lamella sandwiched between two amorphous polymer layers is obtained by annealing the nanoparticles at 125 C. This thickening of the crystalline lamella can be understood in terms of an unlooping of polymer chains within a single nanoparticle. In addition a variation of the annealing temperature from 90 C to 115 C demonstrates that the inverse of the crystalline lamellar thickness increases linearly with the annealing temperatures leading to a recrystallization line in a Gibbs-Thomson graph. Since the nanoparticles consist of about only eight polymer chains, they can be considered as a ideal candidates for the experimental realization of equilibrium polymer crystals.

Christophe N. Rochette; Sabine Rosenfeldt; Katja Henzler; Frank Polzer; Matthias Ballauff; Qiong Tong; Stefan Mecking; Markus Drechsler; Theyencheri Narayanan; Ludger Harnau

2011-07-05T23:59:59.000Z

433

Ultrasonic characterization of single drops of liquids  

DOE Patents [OSTI]

Ultrasonic characterization of single drops of liquids. The present invention includes the use of two closely spaced transducers, or one transducer and a closely spaced reflector plate, to form an interferometer suitable for ultrasonic characterization of droplet-size and smaller samples without the need for a container. The droplet is held between the interferometer elements, whose distance apart may be adjusted, by surface tension. The surfaces of the interferometer elements may be readily cleansed by a stream of solvent followed by purified air when it is desired to change samples. A single drop of liquid is sufficient for high-quality measurement. Examples of samples which may be investigated using the apparatus and method of the present invention include biological specimens (tear drops; blood and other body fluid samples; samples from tumors, tissues, and organs; secretions from tissues and organs; snake and bee venom, etc.) for diagnostic evaluation, samples in forensic investigations, and detection of drugs in small quantities.

Sinha, Dipen N. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

434

Chromosome characterization using single fluorescent dye  

DOE Patents [OSTI]

Chromosomes are characterized by fluorescent emissions from a single fluorescent dye that is excited over two different wavelengths. A mixture containing chromosomes is stained with a single dye selected from the group consisting of TOTO and YOYO and the stained chromosomes are placed in a flow cytometer. The fluorescent dye is excited sequentially by a first light having a wavelength in the ultraviolet range to excite the TOTO or YOYO to fluoresce at a first intensity and by a second light having a wavelength effective to excite the TOTO or YOYO dye to fluoresce at a second intensity. Specific chromosomes may be identified and sorted by intensity relationships between the first and second fluorescence emissions.

Crissman, Harry A. (Los Alamos, NM); Hirons, Gregory T. (Irvine, CA)

1995-01-01T23:59:59.000Z

435

Neutron detection with single crystal organic scintillators  

SciTech Connect (OSTI)

Detection of high-energy neutrons in the presence of gamma radiation background utilizes pulse-shape discrimination (PSD) phenomena in organics studied previously only with limited number of materials, mostly liquid scintillators and single crystal stilbene. The current paper presents the results obtained with broader varieties of luminescent organic single crystals. The studies involve experimental tools of crystal growth and material characterization in combination with the advanced computer modeling, with the final goal of better understanding the relevance between the nature of the organic materials and their PSD properties. Special consideration is given to the factors that may diminish or even completely obscure the PSD properties in scintillating crystals. Among such factors are molecular and crystallographic structures that determine exchange coupling and exciton mobility in organic materials and the impurity effect discussed on the examples of trans-stilbene, bibenzyl, 9,10-diphenylanthracene and diphenylacetylene.

Zaitseva, N; Newby, J; Hamel, S; Carman, L; Faust, M; Lordi, V; Cherepy, N; Stoeffl, W; Payne, S

2009-07-15T23:59:59.000Z

436

Information capacity of a single photon  

Science Journals Connector (OSTI)

Quantum states of light are the obvious choice for communicating quantum information. To date, encoding information into the polarization states of single photons has been widely used as these states form a natural closed two-state qubit. However, photons are able to encode much morein principle, infiniteinformation via the continuous spatiotemporal degrees of freedom. Here we consider the information capacity of an optical quantum channel, such as an optical fiber, where a spectrally encoded single photon is the means of communication. We use the Holevo bound to calculate an upper bound on the channel capacity, and relate this to the spectral encoding basis and the spectral properties of the channel. Further, we derive analytic bounds on the capacity of such channels, and, in the case of a symmetric two-state encoding, calculate the exact capacity of the corresponding channel.

Peter P. Rohde; Joseph F. Fitzsimons; Alexei Gilchrist

2013-08-09T23:59:59.000Z

437

Single-molecule studies of riboswitch folding  

Science Journals Connector (OSTI)

Abstract The folding dynamics of riboswitches are central to their ability to modulate gene expression in response to environmental cues. In most cases, a structural competition between the formation of a ligand-binding aptamer and an expression platform (or some other competing off-state) determines the regulatory outcome. Here, we review single-molecule studies of riboswitch folding and function, predominantly carried out using single-molecule FRET or optical trapping approaches. Recent results have supplied new insights into riboswitch folding energy landscapes, the mechanisms of ligand binding, the roles played by divalent ions, the applicability of hierarchical folding models, and kinetic vs. thermodynamic control schemes. We anticipate that future work, based on improved data sets and potentially combining multiple experimental techniques, will enable the development of more complete models for complex RNA folding processes. This article is part of a Special Issue entitled: Riboswitches.

Andrew Savinov; Christian F. Perez; Steven M. Block

2014-01-01T23:59:59.000Z

438

Single transmission line data acquisition system  

DOE Patents [OSTI]

A single transmission line interrogated multiple channel data acquisition system is provided in which a plurality of remote station/sensors monitor specific process variables and transmit measurement values over the single transmission line to a master station when addressed by the master station. Power for all remote stations (up to 980) is provided by driving the line with constant voltage supplied from the master station and automatically maintained independent of the number of remote stations directly connected to the line. The transmission line can be an RG-62 coaxial cable with lengths up to about 10,000 feet with branches up to 500 feet. The remote stations can be attached randomly along the line. The remote stations can be scanned at rates up to 980 channels/second.

Fasching, George E. (Morgantown, WV)

1984-01-01T23:59:59.000Z

439

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

440

Tapered fiber coupling of single photons emitted by a deterministically positioned single nitrogen vacancy center  

SciTech Connect (OSTI)

A diamond nano-crystal hosting a single nitrogen vacancy (NV) center is optically selected with a confocal scanning microscope and positioned deterministically onto the subwavelength-diameter waist of a tapered optical fiber (TOF) with the help of an atomic force microscope. Based on this nano-manipulation technique, we experimentally demonstrate the evanescent coupling of single fluorescence photons emitted by a single NV-center to the guided mode of the TOF. By comparing photon count rates of the fiber-guided and the free-space modes and with the help of numerical finite-difference time domain simulations, we determine a lower and upper bound for the coupling efficiency of (9.5??0.6)% and (10.4??0.7)%, respectively. Our results are a promising starting point for future integration of single photon sources into photonic quantum networks and applications in quantum information science.

Liebermeister, Lars, E-mail: lars.liebermeister@physik.uni-muenchen.de; Petersen, Fabian; Mnchow, Asmus v.; Burchardt, Daniel; Hermelbracht, Juliane; Tashima, Toshiyuki [Fakultt fr Physik, Ludwig-Maximilians-Universitt Mnchen, 80799 Mnchen (Germany); Schell, Andreas W.; Benson, Oliver [Institut fr Physik, Humboldt-Universitt zu Berlin, 12489 Berlin (Germany); Meinhardt, Thomas; Krueger, Anke [Institut fr Organische Chemie, Universitt Wrzburg, 97074 Wrzburg (Germany); Wilhelm Conrad Roentgen Research Center for Complex Materials Systems, Universitt Wrzburg, 97074 Wrzburg (Germany); Stiebeiner, Ariane; Rauschenbeutel, Arno [Atominstitut, Technische Universitt Wien, 1020 Wien (Austria); Weinfurter, Harald; Weber, Markus, E-mail: markusweber@lmu.de [Fakultt fr Physik, Ludwig-Maximilians-Universitt Mnchen, 80799 Mnchen (Germany); Max-Planck-Institut fr Quantenoptik, 85748 Garching (Germany)

2014-01-20T23:59:59.000Z

Note: This page contains sample records for the topic "megawatt single axis" 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

Acoustic Energy Storage in Single Bubble Sonoluminescence  

E-Print Network [OSTI]

Single bubble sonoluminescence is understood in terms of a shock focusing towards the bubble center. We present a mechanism for significantly enhancing the effect of shock focusing, arising from the storage of energy in the acoustic modes of the gas. The modes with strongest coupling are not spherically symmetric. The storage of acoustic energy gives a framework for understanding how light intensities depend so strongly on ambient gases and liquids and suggests that the light intensities of successive flashes are highly correlated.

Michael P. Brenner; Sascha Hilgenfeldt; Detlef Lohse; Rodolfo R. Rosales

1996-05-07T23:59:59.000Z

442

1993 NEC 1) (Single-Walled Carbon  

E-Print Network [OSTI]

MWNT (Vapor-grown carbon fiber, VGCF)33) 10001300 34) SWNT CCVD Smalley 15) CO SWNT SWNT 1993 NEC 1) (Single-Walled Carbon Nanotubes, SWNTs) 1(a) 1nm µm µm SWNTs 2) (MWNTs) 1(c 29,30,35-41) SWNT , MgO Fe/Co, Ni/Co, Mo/Co nm SWNT VGCF Fe(CO)5 SWNT Ethanol tank Hot

Maruyama, Shigeo

443

Single-mode fiber, velocity interferometry  

SciTech Connect (OSTI)

In this paper, we describe a velocity interferometer system based entirely on single-mode fiber optics. This paper includes a description of principles used in developing the single-mode velocity interferometry system (SMV). The SMV design is based on polarization-insensitive components. Polarization adjusters are included to eliminate the effects of residual birefringence and polarization dependent losses in the interferometers. Characterization measurements and calibration methods needed for data analysis and a method of data analysis are described. Calibration is performed directly using tunable lasers. During development, we demonstrated its operation using exploding-foil bridge-wire fliers up to 200 m/s. In a final test, we demonstrated the SMV in a gas gun experiment up to 1.2 km/sec. As a basis for comparison in the gas gun experiment, we used another velocimetry technique that is also based on single-mode fiber optics: photonic Doppler velocimetry (PDV). For the gas gun experiment, we split the light returned from a single target spot and performed a direct comparison of the homodyne (SMV) and heterodyne (PDV) techniques concurrently. The two techniques had a negligible mean difference and a 1.5% standard deviation in the one-dimensional shock zone. Within one interferometer delay time after a sudden Doppler shift, a SMV unencumbered by multimode-fiber dispersion exhibits two color beats. These beats have the same period as PDV beats--this interference occurs between the ''recently'' shifted and ''formerly unshifted'' paths within the interferometer. We believe that recognizing this identity between homodyne and heterodyne beats is novel in the shock-physics field. SMV includes the conveniences of optical fiber, while removing the time resolution limitations associated with the multimode delivery fiber.

Krauter, K. G.; Jacobson, G. F.; Patterson, J. R.; Nguyen, J. H.; Ambrose, W. P. [Lawrence Livermore National Laboratory, 7000 East Ave., Livermore California 94551 (United States)

2011-04-15T23:59:59.000Z

444

ARTICLES ON SINGLE-MOLECULE PHYSICS AND CHEMISTRY Direct measurements of memory effects in single-molecule kinetics  

E-Print Network [OSTI]

ARTICLES ON SINGLE-MOLECULE PHYSICS AND CHEMISTRY Direct measurements of memory effects in single-molecule and correlations of single-molecule sequences of modulated reactions are explicitly evaluated in the stochastic of the stochastic rate expression, characterizes the correlation in single-molecule rate processes in a formalism

Cao, Jianshu

445

Lommerse et al. Single-Molecule Imaging ... Single-molecule imaging of lipid-anchored proteins reveals  

E-Print Network [OSTI]

Lommerse et al. Single-Molecule Imaging ... 1 Single-molecule imaging of lipid-anchored proteins in "Biophys J 86, 1 Pt 1 (2004) 609-16" #12;Lommerse et al. Single-Molecule Imaging ... 2 Manuscript, fluorescence recovery after photobleaching hal-00143982,version1-29Apr2007 #12;Lommerse et al. Single-Molecule

Boyer, Edmond

446

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Platinum Nanoclusters Out-Perform Single Crystals Platinum Nanoclusters Out-Perform Single Crystals Print Wednesday, 27 October 2010 00:00 When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

447

FLOP Counts for Single-Node Tests  

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

FLOP Counts for "Small" Single-Node Miniapplication Tests FLOP Counts for "Small" Single-Node Miniapplication Tests FLOP Counts for "Small" Single-Node Miniapplication Tests These data, obtained using the NERSC Hopper system, are provided for reference. Code MPI Tasks Threads Reference TFLOP Count Benchmark Time (seconds) # of iterations miniFE 144 1 5.05435E+12 130.2 (total program time) miniGhost 96 1 6.55500E+12 76.5 AMG 96 1 1.30418E+12 66.95 18 UMT 96 1 1.30211E+13 416.99 49 SNAP 96 1 5.84246E+11 15.37 3059 miniDFT 40 1 2.32379E+13 153.97 GTC 64 1 6.63670E+13 1839.4 MILC 24 1 1.45971E+13 744.3 CORRECTION (02 August 2013): The values given for the reference counts are FLOPs, not TFLOPs. Last edited: 2013-08-02 09:40:18

448

Panoramic Holography: Toward a Single Shot Stopwatch  

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

Panoramic Holography: Toward a Single Panoramic Holography: Toward a Single Shot Stopwatch Panoramic images are captivating in any form, be it of a city sky line or a mosaic of micrographs. They feature a wide field of view and uncompromised resolution. Forming such extraordinary images can be achieved with oversized film or by stitching together smaller images. But these options are not always practical for microscopy with x-rays especially for imaging with ultrashort pulses of x-rays. We have demonstrated a new holographic technique, called extended field of view Fourier transform holography (FTH), for imaging isolated areas of a nanoscale sample without compromising spatial resolution. This technique overcomes one of the central challenges in imaging, namely to simultaneously obtain high spatial resolution and a large field of view. The method is compatible with single shot imaging-a feature particularly important for studying dynamics at upcoming X-ray free electron lasers like the Linac Coherent Light Source (LCLS) at SLAC.

449

Single-atom cavity QED and optomicromechanics  

SciTech Connect (OSTI)

In a recent publication [K. Hammerer, M. Wallquist, C. Genes, M. Ludwig, F. Marquardt, P. Treutlein, P. Zoller, J. Ye, and H. J. Kimble, Phys. Rev. Lett. 103, 063005 (2009)] we have shown the possibility to achieve strong coupling of the quantized motion of a micron-sized mechanical system to the motion of a single trapped atom. In the proposed setup the coherent coupling between a SiN membrane and a single atom is mediated by the field of a high finesse cavity and can be much larger than the relevant decoherence rates. This makes the well-developed tools of cavity quantum electrodynamics with single atoms available in the realm of cavity optomechanics. In this article we elaborate on this scheme and provide detailed derivations and technical comments. Moreover, we give numerical as well as analytical results for a number of possible applications for transfer of squeezed or Fock states from atom to membrane as well as entanglement generation, taking full account of dissipation. In the limit of strong-coupling the preparation and verification of nonclassical states of a mesoscopic mechanical system is within reach.

Wallquist, M.; Hammerer, K.; Zoller, P.; Genes, C.; Ludwig, M.; Marquardt, F.; Treutlein, P.; Ye, J.; Kimble, H. J. [Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Communication, Austrian Academy of Sciences, Technikerstrasse 25, 6020 Innsbruck, Austria and Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Communication, Austrian Academy of Sciences, Technikerstrasse 25, 6020 Innsbruck (Austria); Department of Physics, Center for NanoScience, and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universitaet Muenchen, Theresienstr. 37, D-80333 Munich (Germany); Max-Planck-Institute of Quantum Optics and Department of Physics, Ludwig-Maximilians-Universitaet Muenchen, Schellingstr. 4, D-80799 Munich (Germany); JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA and Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States)

2010-02-15T23:59:59.000Z

450

Stellar Kinematics in the Complicated Inner Spheroid of M31: Discovery of Substructure Along the Southeastern Minor Axis and its Relationship to the Giant Southern Stream  

E-Print Network [OSTI]

We present the discovery of a kinematically-cold stellar population along the SE minor axis of the Andromeda galaxy (M31) that is likely the forward continuation of M31's giant southern stream. This discovery was made in the course of an on-going spectroscopic survey of red giant branch (RGB) stars in M31 using the DEIMOS instrument on the Keck II 10-m telescope. Stellar kinematics are investigated in eight fields located 9-30 kpc from M31's center (in projection). A likelihood method based on photometric and spectroscopic diagnostics is used to isolate confirmed M31 RGB stars from foreground Milky Way dwarf stars: for the first time, this is done without using radial velocity as a selection criterion, allowing an unbiased study of M31's stellar kinematics. The radial velocity distribution of the 1013 M31 RGB stars shows evidence for the presence of two components. The broad (hot) component has a velocity dispersion of 129 km/s and presumably represents M31's virialized spheroid. A significant fraction (19%) of the population is in a narrow (cold) component centered near M31's systemic velocity with a velocity dispersion that decreases with increasing radial distance, from 55.5 km/s at R_proj=12 kpc to 10.6 km/s at R_proj=18 kpc. The spatial and velocity distribution of the cold component matches that of the "Southeast shelf" predicted by the Fardal et al. (2007) orbital model of the progenitor of the giant southern stream. The metallicity distribution of the cold component matches that of the giant southern stream, but is about 0.2 dex more metal rich on average than that of the hot spheroidal component. We discuss the implications of our discovery on the interpretation of the intermediate-age spheroid population found in this region in recent ultra-deep HST imaging studies.

Karoline M. Gilbert; Mark Fardal; Jasonjot S. Kalirai; Puragra Guhathakurta; Marla C. Geha; Jedidah Isler; Steven R. Majewski; James C. Ostheimer; Richard J. Patterson; David B. Reitzel; Evan Kirby; Michael C. Cooper

2007-03-01T23:59:59.000Z

451

A new, very massive modular Liquid Argon Imaging Chamber to detect low energy off-axis neutrinos from the CNGS beam. (Project MODULAr)  

E-Print Network [OSTI]

The paper is considering an opportunity for the CERN/GranSasso (CNGS) neutrino complex, concurrent time-wise with T2K and NOvA, to search for theta_13 oscillations and CP violation. Compared with large water Cherenkov (T2K) and fine grained scintillators (NOvA), the LAr-TPC offers a higher detection efficiency and a lower backgrounds, since virtually all channels may be unambiguously recognized. The present proposal, called MODULAr, describes a 20 kt fiducial volume LAr-TPC, following very closely the technology developed for the ICARUS-T60o, and is focused on the following activities, for which we seek an extended international collaboration: (1) the neutrino beam from the CERN 400 GeV proton beam and an optimised horn focussing, eventually with an increased intensity in the framework of the LHC accelerator improvement program; (2) A new experimental area LNGS-B, of at least 50000 m3 at 10 km off-axis from the main Laboratory, eventually upgradable to larger sizes. A location is under consideration at about 1.2 km equivalent water depth; (3) A new LAr Imaging detector of at least 20 kt fiducial mass. Such an increase in the volume over the current ICARUS T600 needs to be carefully considered. It is concluded that a very large mass is best realised with a set of many identical, independent units, each of 5 kt, "cloning" the technology of the T600. Further phases may foresee extensions of MODULAr to meet future physics goals. The experiment might reasonably be operational in about 4/5 years, provided a new hall is excavated in the vicinity of the Gran Sasso Laboratory and adequate funding and participation are made available.

B. Baibussinov; M. Baldo Ceolin; G. Battistoni; P. Benetti; A. Borio; E. Calligarich; M. Cambiaghi; F. Cavanna; S. Centro; A. G. Cocco; R. Dolfini; A. Gigli Berzolari; C. Farnese; A. Fava; A. Ferrari; G. Fiorillo; D. Gibin; A. Guglielmi; G. Mannocchi; F. Mauri; A. Menegolli; G. Meng; C. Montanari; O. Palamara; L. Periale; A. Piazzoli; P. Picchi; F. Pietropaolo; A. Rappoldi; G. L. Raselli; C. Rubbia; P. Sala; G. Satta; F. Varanini; S. Ventura; C. Vignoli

2007-04-11T23:59:59.000Z

452

Diffusion in single crystals of melilite: 2. Cations  

SciTech Connect (OSTI)

Diffusion coefficients of divalent cations, Ni, Co, Fe, Mn, Ca, Sr, and Ba, in synthetic akermanite were determined by tracer-diffusion experiments. Diffusion coefficients of cation paris, Al + Al-Mg + Si, Al + Al-Co + Si, and Mg-Co in melilite solid-solution systems, were determined by coupled annealing of synthetic melilites of endmember compositions. Cobalt tracer diffuses slower along the c-crystallographic axis than along the a-axis by a factor of about three, possibly due to the anisotropic sheet-like arrangement of oxygen ions parallel to the (001) plane which is perpendicular to the c-axis in the crystal structure of melilite. In the coupled diffusion experiments, the cation pairs interdiffuse complementary, as expected for conservation of material and ionic charge balance in the substitution. The observed trend in the inter-diffusion coefficient vs. melting temperature relations is similar to those observed for alloys and consistent with an empirical rule for self-diffusion coefficient-melting temperature relation. In the diffusion coefficient vs. ionic radius diagram for divalent cation diffusion in akermanite, smooth curves were observed as in the case of olivine systems. However, the shapes of the curves were significantly different from those observed in olivine systems. The observed trend of diffusion coefficients with ionic radius can be explained on the basis of crystal structure-controlled diffusion in akermanite.

Morioka, Masana (Univ. of Tokyo Yayoi (Japan)); Nagasawa, Hiroshi (Gakushiun Univ. Mejiro, Tokyo (Japan))

1991-03-01T23:59:59.000Z

453

Single track effects, biostack and risk assessment  

SciTech Connect (OSTI)

This talk addresses the single-track nature of the space radiation environment, and points out the importance of single hits'' in the evaluation of radiation risk for long-term missions occurring outside the earth's magnetic field. A short review is made of biological objects found to show increased effects when hit'' by a single heavy charged-particle in space. A brief discussion is given of the most provocative results from the bacterial spore B. subtilis: experimental evidence that tracks can affect biological systems at much larger distances from the trajectory than previously suspected, and that the resultant inactivation cross section in space calculated for this system is very large. When taken at face value, the implication of these results, when compared to those from experiments performed at ground-based accelerators with beams at low energies in the same LET range, is that high-energy particles can exert their influence a surprising distance from their trajectory and the inactivation cross sections are some twenty times larger than expected. Clearly, beams from high-energy heavy-ion accelerators should be used to confirm these results. For those end points that can also be caused by low-LET beams such as high-energy protons, it is important to measure their action cross sections as well. The ratio of the cross sections for a high-LET beam to that of a low-LET beam is an interesting experimental ratio and, we suggest, of more intrinsic interest than the RBE. It is a measure of the biological'' importance of one particle type relative to another particle type. This ratio will be introduced and given the name RPPE (Relative Per Particle Effectiveness). Values of RPPE will be discussed.

Curtis, S.B.

1992-10-01T23:59:59.000Z

454

Single track effects, biostack and risk assessment  

SciTech Connect (OSTI)

This talk addresses the single-track nature of the space radiation environment, and points out the importance of single ``hits`` in the evaluation of radiation risk for long-term missions occurring outside the earth`s magnetic field. A short review is made of biological objects found to show increased effects when ``hit`` by a single heavy charged-particle in space. A brief discussion is given of the most provocative results from the bacterial spore B. subtilis: experimental evidence that tracks can affect biological systems at much larger distances from the trajectory than previously suspected, and that the resultant inactivation cross section in space calculated for this system is very large. When taken at face value, the implication of these results, when compared to those from experiments performed at ground-based accelerators with beams at low energies in the same LET range, is that high-energy particles can exert their influence a surprising distance from their trajectory and the inactivation cross sections are some twenty times larger than expected. Clearly, beams from high-energy heavy-ion accelerators should be used to confirm these results. For those end points that can also be caused by low-LET beams such as high-energy protons, it is important to measure their action cross sections as well. The ratio of the cross sections for a high-LET beam to that of a low-LET beam is an interesting experimental ratio and, we suggest, of more intrinsic interest than the RBE. It is a measure of the ``biological`` importance of one particle type relative to another particle type. This ratio will be introduced and given the name RPPE (Relative Per Particle Effectiveness). Values of RPPE will be discussed.

Curtis, S.B.

1992-10-01T23:59:59.000Z

455

Single Z Production at the Tevatron  

SciTech Connect (OSTI)

The production of single Z bosons has been studied at Fermilab's Tevatron by the CDF and D0 collaborations. Measurements include the weak mixing angle, vector and axial-vector couplings between Z bosons and light quarks, and angular coefficients in electronic decays which are sensitive to the spin of the gluon. The collaborations have looked for and indication of new physics above the mass scale that can be directly produced at the Tevatron by studying the interference between Z and photon propagators. All measurements are consistent with Standard Model expectations.

Phillips, Thomas J.

2012-05-01T23:59:59.000Z

456

Transient Rayleigh scattering from single semiconductor nanowires  

SciTech Connect (OSTI)

Transient Rayleigh scattering spectroscopy is a new pump-probe technique to study the dynamics and cooling of photo-excited carriers in single semiconductor nanowires. By studying the evolution of the transient Rayleigh spectrum in time after excitation, one can measure the time evolution of the density and temperature of photo-excited electron-hole plasma (EHP) as they equilibrate with lattice. This provides detailed information of dynamics and cooling of carriers including linear and bimolecular recombination properties, carrier transport characteristics, and the energy-loss rate of hot electron-hole plasma through the emission of LO and acoustic phonons.

Montazeri, Mohammad; Jackson, Howard E.; Smith, Leigh M. [Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011 (United States); Yarrison-Rice, Jan M. [Department of Physics, Miami University, Oxford, OH 45056 (United States); Kang, Jung-Hyun; Gao, Qiang; Tan, Hark Hoe; Jagadish, Chennupati [Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia)

2013-12-04T23:59:59.000Z

457

Statistics of Single-Molecule Detection  

Science Journals Connector (OSTI)

Statistics of Single-Molecule Detection ... K(ti+1,ti,r?i+1,r?i) is the probability that no photon is detected and no photobleaching happens between ti and ti+1, if the molecule was at position r?i at time ti and at position r?i+1 at time ti+1 and ?tVf(r?) and ?tVbl(r?) are the probabilities to detect a photon and to photobleach the molecule within time ?t, respectively, if the molecule is at position r?. ... fluorescence without statistical anal. ...

Jrg Enderlein; David L. Robbins; W. Patrick Ambrose; Peter M. Goodwin; Richard A. Keller

1997-05-01T23:59:59.000Z

458

Quantum thermal machines with single nonequilibrium environments  

E-Print Network [OSTI]

We propose a scheme for a quantum thermal machine made by atoms interacting with a single non-equilibrium electromagnetic field. The field is produced by a simple configuration of macroscopic objects held at thermal equilibrium at different temperatures. We show that these machines can deliver all thermodynamic tasks (cooling, heating and population inversion), and this by establishing quantum coherence with the body on which they act. Remarkably, this system allows to reach efficiencies at maximum power very close to the Carnot limit, much more than in existing models. Our findings offer a new paradigm for efficient quantum energy flux management, and can be relevant for both experimental and technological purposes.

Bruno Leggio; Bruno Bellomo; Mauro Antezza

2015-01-08T23:59:59.000Z

459

Single stage rankine and cycle power plant  

SciTech Connect (OSTI)

The specification describes a Rankine cycle power plant of the single stage type energized by gasified freon, the latter being derived from freon in the liquid state in a boiler provided in the form of a radio frequency heating cell adapted at low energy input to effect a rapid change of state from liquid freon at a given temperature and pressure to gaseous freon of relatively large volume, thereby to drive a Rankine cycle type of engine recognized in the prior art as a steam engine type of engine of the piston or turbine type.

Closs, J.J.

1981-10-13T23:59:59.000Z

460

Single atom as a macroscopic entanglement source  

E-Print Network [OSTI]

by many authors including the generation of entangled coherent state #3;1?3#4;, single photon and vacuum entanglement #3;4#4;, and two-atom entanglement #3;5#4;. More recently, generation of macroscopic entangled states via phase sensitive... cascade configuration crossing or trapped in a two-mode field cavity. The atomic level configuration is depicted in Fig. 1. The two atomic transitions #5;a#6;? #5;b#6; and #5;b#6;? #5;c#6; interact with the two cavity modes with detunings #1...

Zhou, Ling; Xiong, Han; Zubairy, M. Suhail.

2006-01-01T23:59:59.000Z

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


461

Controlled synthesis of single-crystalline graphene  

SciTech Connect (OSTI)

This paper reports the controlled synthesis of single-crystalline graphene on the back side of copper foil using CH{sub 4} as the precursor. The influence of growth time and the pressure ratio of CH{sub 4}/H{sub 2} on the structure of graphene are examined. An optimized polymer-assisted method is used to transfer the synthesized graphene onto a SiO{sub 2}/Si substrate. Scanning electron microscopy and Raman spectroscopy are used to characterize the graphene.

Xueshen, Wang, E-mail: wangxs@nim.ac.cn; Jinjin, Li, E-mail: jinjinli@nim.ac.cn; Qing, Zhong; Yuan, Zhong; Mengke, Zhao; Yonggang, Liu [National Institute of Metrology, Beijing, China, 100013 (China)] [National Institute of Metrology, Beijing, China, 100013 (China)

2014-03-15T23:59:59.000Z

462

Single-ion nonlinear mechanical oscillator  

SciTech Connect (OSTI)

We study the steady-state motion of a single trapped ion oscillator driven to the nonlinear regime. Damping is achieved via Doppler laser cooling. The ion motion is found to be well described by the Duffing oscillator model with an additional nonlinear damping term. We demonstrate here the unique ability of tuning both the linear as well as the nonlinear damping coefficients by controlling the laser-cooling parameters. Our observations pave the way for the investigation of nonlinear dynamics on the quantum-to-classical interface as well as mechanical noise squeezing in laser-cooling dynamics.

Akerman, N.; Kotler, S.; Glickman, Y.; Dallal, Y.; Keselman, A.; Ozeri, R. [Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100 (Israel)

2010-12-15T23:59:59.000Z

463

Neutron single target spin asymmetries in SIDIS  

SciTech Connect (OSTI)

The experiment E06-010 in Hall A at Jefferson Lab took data between November 2008 and February 2009 to directly measure, for the first time, the pion (and kaon) single "neutron" target-spin asymmetry (SSA) in semi-inclusive DIS from a polarized 3He target. Collins, Sivers (and Pretzelosity) neutron asymmetries are going to be extracted from the measured SSA. Details of the experiment are described together with the preliminary results of the ongoing analysis. Near future Hall A experiments on transverse nucleon spin structure are shorty reviewed.

Evaristo Cisbani

2010-04-01T23:59:59.000Z

464

Health physics considerations in 131I production at a one megawatt TRIGA reactor  

E-Print Network [OSTI]

neutron irradiation of an enriched target of tellurium dioxide and tellurium trioxide. A 500 g sample of this mixture was studied for placemencjn location A-5 of thzTeactor core ehavmg a thermal neutron flux of 1. 0 x 10" n cm' s '. Calculations.... 3. Neutron activation of tellurium involves the capture of a neutron and the emission of prompt gamma rays. Production of "'I by irradiation of ' Te is depicted in Fig. 4 (Constant 1970). Yield of "'I is proportional to the enrichment of '"Te...

Flora, Jason Todd

1993-01-01T23:59:59.000Z

465

Progress Toward Megawatt Class Superconducting Generators which Operate at Greater than 20 Kelvin  

Science Journals Connector (OSTI)

Recent advances in conductor development have enabled short lengths of Ag/BSCCO tape to carry current in excess of 6.5104 A/cm2 at 2T and 20K. While prereacted long lengths of conductor are not yet able to provi...

C. E. Oberly; C. Joshi; A. J. Rodenbush; S. J. Young

1994-01-01T23:59:59.000Z

466

Application of industrial heat pumps Proven applications in 2012 for Megawatt+  

E-Print Network [OSTI]

food and the environment High-quality, reliable and energy efficient HVAC solutions for every type it work?Source and Need: How does it work?Source and Need: How does it work? High temperature (high as Hot Water Boiler 99°C 61.5 Bar Ammonia #12;9 Factors affecting economic viabilityFactors affecting

Oak Ridge National Laboratory

467

Commissioning and Start Up of a 110 MegaWatt Cogeneration Facility  

E-Print Network [OSTI]

operations. As a result of the Project Team's efforts, the cogeneration facility achieved 100% of design output on December 22, 1987 without any significant impact on the manufacturing facility."...

Good, R.

468

Spectroscopic temperature measurements of air breakdown plasma using a 110 GHz megawatt gyrotron beam  

SciTech Connect (OSTI)

Temperature measurements are presented of a non-equilibrium air breakdown plasma using optical emission spectroscopy. A plasma is created with a focused 110 GHz 3 {mu}s pulse gyrotron beam in air that produces power fluxes exceeding 1 MW/cm{sup 2}. Rotational and vibrational temperatures are spectroscopically measured over a pressure range of 1-100 Torr as the gyrotron power is varied above threshold. The temperature dependence on microwave field as well as pressure is examined. Rotational temperature measurements of the plasma reveal gas temperatures in the range of 300-500 K and vibrational temperatures in the range of 4200-6200 K. The vibrational and rotational temperatures increase slowly with increasing applied microwave field over the range of microwave fields investigated.

Hummelt, J. S.; Shapiro, M. A.; Temkin, R. J. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2012-12-15T23:59:59.000Z

469

A 1 MEGAWATT POLYPHASE BOOST CONVERTER-MODULATOR FOR KLYSTRON PULSE APPLICATION  

SciTech Connect (OSTI)

This paper describes electrical design criteria and first operational results a 140 kV, 1 MW average, 11 MW peak, zero-voltage-switching 20 kHz polyphase bridge, boost converter/modulator for klystron pulse application. The DC-DC converter derives the buss voltages from a standard 13.8 kV to 2300 Y substation cast-core transformer. Energy storage and filtering is provided by self-clearing metallized hazy polypropylene traction capacitors. Three ''H-Bridge'' Insulated Gate Bipolar Transistor (IGBT) switching networks are used to generate the polyphase 20 kHz transformer primary drive waveforms. The 20 kHz drive waveforms are chirped the appropriate duration to generate the desired klystron pulse width. PWM (pulse width modulation) of the individual 20 kHz pulses is utilized to provide regulated output waveforms with adaptive feedforward and feedback techniques. The boost transformer design utilizes amorphous nanocrystalline material that provides the required low core loss at design flux levels and switching frequencies. Resonant shunt-peaking is used on the transformer secondary to boost output voltage and resonate transformer leakage inductance. With the appropriate transformer leakage inductance and peaking capacitance, zero-voltage-switching of the IGBT's is attained, minimizing switching losses. A review of these design parameters and the first results of the performance characteristics will be presented.

W.A. REASS; J.D. DOSS; R.F. GRIBBLE

2001-06-01T23:59:59.000Z

470

Economic Impacts from Indiana's First 1,000 Megawatts of Wind Power  

SciTech Connect (OSTI)

The magnitude of Indiana's available wind resource indicates that the development of wind power infrastructure has the potential to support millions of dollars of economic activity in the state. The Jobs and Economic Development Impact (JEDI) models, developed by the National Renewable Energy Laboratory, are tools used to estimate some of the economic impacts of energy projects at the state level. JEDI calculates results in the form of jobs, earnings, and economic output in three categories: project development and onsite labor, local revenue and supply chain, and induced impacts. According to this analysis, the first 1,000 MW of wind power development in Indiana (projects built between 2008 and 2011): supported employment totaling more than 4,400 full-time-equivalent jobs in Indiana during the construction periods; supports approximately 260 ongoing Indiana jobs; supported nearly $570 million in economic activity for Indiana during the construction periods; supported and continues to support nearly $40 million in annual Indiana economic activity during the operating periods; generates more than $8 million in annual property taxes; generates nearly $4 million annually in income for Indiana landowners who lease their land for wind energy projects.

Tegen, S.; Keyser, D.; Flores-Espino, F.; Hauser, R.

2014-08-01T23:59:59.000Z

471

A multi-reactor configuration for multi-megawatt spacecraft power supplies  

E-Print Network [OSTI]

, and various conceptual designs were explored. One design was selected for further refinement and analysis. Various configurations of power units with differing number, size, and conversion technology were involved. Optimum reactor/payload separation... distances were found to run from 60 to 80m. It was found that reliability studies utilizing spare power conversion units and reactors do not necessarily result in the most mass effective means of insuring mission success for NEP vehicles. By increasing...

George, Jeffrey Alan

2012-06-07T23:59:59.000Z

472

Design and analysis of megawatt-class heat-pipe reactor concepts  

SciTech Connect (OSTI)

There is growing interest in finding an alternative to diesel-powered systems at locations removed from a reliable electrical grid. One promising option is a 1- to 10-MW mobile reactor system, that could provide robust, self-contained, and long-term ({>=} 5 years) power in any environment. The reactor and required infrastructure could be transported to any location within one or a few standard transport containers. Heat pipe reactors, using alkali metal heat pipes, are perfectly suited for mobile applications because their nature is inherently simpler, smaller, and more reliable than 'traditional' reactors that rely on pumped coolant through the core. This paper examines a heat pipe reactor that is fabricated and shipped as six identical core segments. Each core segment includes a heat-pipe-to-gas heat exchanger that is coupled to the condenser end of the heat pipes. The reference power conversion system is a CO{sub 2}-Brayton system. The segments by themselves are deeply subcritical during transport, and they would be locked into an operating configuration (with control inserted) at the final destination. Two design options are considered: a near-term option and an advanced option. The near-term option is a 5-MWt concept that uses uranium-dioxide fuel, a stainless-steel structure, and potassium as the heat-pipe working fluid. The advanced option is a 15-MWt concept that uses uranium-nitride fuel, a molybdenum/TZM structure, and sodium as the heat-pipe working fluid. The materials used in the advanced option allow for higher temperatures and power densities, and enhanced power throughput in the heat pipes. Higher powers can be obtained from both concepts by increasing the core size and the number of heat pipes. (authors)

Poston, D.; Kapernick, R. [Los Alamos National Laboratory, MS C921, Los Alamos, NM 87545 (United States)

2012-07-01T23:59:59.000Z

473

Advantages and applications of megawatt-sized heat-pipe reactors  

SciTech Connect (OSTI)

Recently, worldwide interest in nuclear energy has focused on small reactors (10 to 300 MWe) to address emerging energy needs in remote locations. These designs are new to varying degrees but share similar approaches and common weaknesses with regard to primary heat rejection that differ little from reactor designs of the late 1950's. Here, an innovative concept, heat-pipe reactors, is discussed. The concept is unique in its simplicity and potential for safe, affordable, and reliable energy. Given the potential for reactors to meet worldwide energy needs and the pivotal role of heat rejection in overall reactor safety, the potential societal impact of this type of innovation is substantial. Heat-pipe-cooled, fast-spectrum reactors have been proposed for government applications requiring a robust, reliable, remotely controlled system with capacity much less than 1 MWe; however, they have not been designed for power ranges greater than 1 MWe. Los Alamos National Laboratory has initiated a study to design heat-pipe-cooled, fast-fission reactors and to generate a point design of a > 10-MWe-class machine suitable for next-generation compact reactors at remote locations. (authors)

McClure, P. R.; Reid, R. S.; Dixon, D. D. [Los Alamos National Laboratory, MS C921, Los Alamos, NM 87545 (United States)

2012-07-01T23:59:59.000Z

474

An electron source with a multiarc plasma emitter for obtaining submillisecond pulsed megawatt beams  

Science Journals Connector (OSTI)

An electron source with a plasma emitter based on an...2...area. The arc-current amplitude for each cathode amounts to 100300 A. Under the action of a constant accelerating voltage applied between the plasma emi...

M. S. Vorobev; S. A. Gamermaister; V. N. Devyatkov

2014-06-01T23:59:59.000Z

475

Ultrasonic characterization of single drops of liquids  

DOE Patents [OSTI]

Ultrasonic characterization of single drops of liquids is disclosed. The present invention includes the use of two closely spaced transducers, or one transducer and a closely spaced reflector plate, to form an interferometer suitable for ultrasonic characterization of droplet-size and smaller samples without the need for a container. The droplet is held between the interferometer elements, whose distance apart may be adjusted, by surface tension. The surfaces of the interferometer elements may be readily cleansed by a stream of solvent followed by purified air when it is desired to change samples. A single drop of liquid is sufficient for high-quality measurement. Examples of samples which may be investigated using the apparatus and method of the present invention include biological specimens (tear drops; blood and other body fluid samples; samples from tumors, tissues, and organs; secretions from tissues and organs; snake and bee venom, etc.) for diagnostic evaluation, samples in forensic investigations, and detection of drugs in small quantities. 5 figs.

Sinha, D.N.

1998-04-14T23:59:59.000Z

476

Single neutralino production at the LHC  

Science Journals Connector (OSTI)

We consider that the direct production of a single neutralino in a proton-proton collision at the CERN Large Hadron Collider focusing on the lightest neutralino is possibly a candidate for dark matter and escapes detection. We present a comprehensive investigation of the dependence of total cross sections of the processes pp(qq)??i0g, pp(qg)??i0qL,R, and pp(qq?)??i0?j+ at tree level and pp(gg)??i0g at one-loop level, on the center-of-mass energy, on the M2-? mass plane, on the squark mass, and on the tan?? for the Constrained Minimal Supersymmetric Standard Model and three extremely different scenarios in the Minimal Supersymmetric Standard Model. In particular, the cross section of the process pp??20?1+ in the gauginolike scenario can reach about 0.6 (1.7)pb at a center-of-mass energy of s=7(14)??TeV. We extract therefrom that our results might lead to new aspects corresponding to experimental explorations, and these dependencies might be used as the bases of experimental research of the single neutralino production at hadron colliders.

A. I. Ahmadov and M. Demirci

2013-07-12T23:59:59.000Z

477

85,000-GPM, single-stage, single-suction LMFBR intermediate centrifugal pump  

SciTech Connect (OSTI)

The mechanical and hydraulic design features of the 85,000-gpm, single-stage, single-suction pump test article, which is designed to circulate liquid-sodium coolant in the intermediate heat-transport system of a Large-Scale Liquid Metal Fast Breeder Reactor (LS-LMFBR), are described. The design and analytical considerations used to satisfy the pump performance and operability requirements are presented. The validation of pump hydraulic performance using a hydraulic scale-model pump is discussed, as is the featute test for the mechanical-shaft seal system.

Fair, C.E.; Cook, M.E. Huber, K.A.; Rohde, R.

1983-01-01T23:59:59.000Z

478

High sensitivity fluorescent single particle and single molecule detection apparatus and method  

DOE Patents [OSTI]

Apparatus is described for ultrasensitive detection of single fluorescent particles down to the single fluorescent molecule limit in a fluid or on a substrate comprising means for illuminating a predetermined volume of the fluid or area of the substrate whereby to emit light including background light from the fluid and burst of photons from particles residing in the area. The photon burst is detected in real time to generate output representative signal. The signal is received and the burst of energy from the fluorescent particles is distinguished from the background energy to provide an indication of the number, location or concentration of the particles or molecules.

Mathies, Richard A. (Contra Costa County, CA); Peck, Konan (Contra Costa County, CA); Stryer, Lubert (Santa Clara County, CA)

1990-01-01T23:59:59.000Z

479

Adaptive Power Control for Single and Multiuser Opportunistic Systems  

E-Print Network [OSTI]

In this dissertation, adaptive power control for single and multiuser opportunistic systems is investigated. First, a new adaptive power-controlled diversity combining scheme for single user systems is proposed, upon which is extended...

Nam, Sung Sik

2010-07-14T23:59:59.000Z

480

Single Payment Vendor Number Request Page 1 of 1  

E-Print Network [OSTI]

. Each payment must be less then $600.00 and may not be a royalty payment. The Single Payment Vendor not be a royalty payment. The single payment vendor number is used for refunds of deposits, human subject payments

Weiblen, George D

Note: This page contains sample records for the topic "megawatt single axis" 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

File:RAPID Single Slide.pdf | Open Energy Information  

Open Energy Info (EERE)

Single Slide.pdf Jump to: navigation, search File File history File usage Metadata File:RAPID Single Slide.pdf Size of this preview: 776 600 pixels. Go to page 1 2 Go next page...

482

Single nucleotide polymorphism discovery in elite north american potato germplasm  

E-Print Network [OSTI]

Single nucleotide polymorphism discovery in elite north american potato germplasm Hamilton et al;RESEARCH ARTICLE Open Access Single nucleotide polymorphism discovery in elite north american potato breeding approaches in potato rely almost entirely on phenotypic evaluations; molecular markers

Douches, David S.

483

Single microbe trap and release in sub-microfluidics. | EMSL  

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

Single microbe trap and release in sub-microfluidics. Single microbe trap and release in sub-microfluidics. Abstract: Lab-on-a-chip systems have substantially impacted the way...

484

Symmetry Breaking of H2 Dissociation by a Single Photon  

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

Symmetry Breaking of H2 Dissociation by a Single Photon Print A single hydrogen (or deuterium) molecule consists of only two protons (deuterons) and two electrons and is perfectly...

485

Single-molecule detection and tracking in plants  

Science Journals Connector (OSTI)

Combining optical properties with a limited choice of fluorophores turns single-molecule imaging in plants into a challenging task. ... however, also apply to the application of single-molecule microscopy to any ...

Markus Langhans; Tobias Meckel

2014-03-01T23:59:59.000Z

486

Single-molecule microscopy study of nano-systems.  

E-Print Network [OSTI]

??In this work, techniques were developed and used to study the properties of molecules on a single-molecule level. Single-molecule techniques have the major advantage, that (more)

Heiss, Gregor

2011-01-01T23:59:59.000Z

487

Sandia National Laboratories: BES Web Highlight: Single-mode...  

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

ClimateECEnergyEnergy EfficiencyBES Web Highlight: Single-mode gallium nitride nanowire lasers BES Web Highlight: Single-mode gallium nitride nanowire lasers "Solid-state Lighting:...

488

Single-molecule electron transfer reactions in nanomaterials  

SciTech Connect (OSTI)

Here we report the study of single molecule electron transfer dynamics by coupling fluorescence microscopy at a conventional electrochemical cell. The single-molecule fluorescence spectroelectrochemistry of cresyl violet in aqueous solution and on nanoparticle surface were studied. We observed that the single-molecule fluorescence intensity of cresyl violet is modulated synchronously with the cyclic voltammetric potential scanning. We attribute the fluorescence intensity change of single cresyl violet molecules to the electron transfer reaction driven by the electrochemical potential.

Hu, Dehong; Lei, Chenghong; Ackerman, Eric J.

2009-07-26T23:59:59.000Z

489

Single channel recordings of K+ currents in squid axons  

Science Journals Connector (OSTI)

... channels are illustrated on the single channel level, and some more detailed features of the elementary current contribution are indicated.

Franco Conti; Erwin Neher

1980-05-15T23:59:59.000Z

490

Cognitive Single Carrier Systems: Joint Impact of Multiple Licensed Transceivers  

E-Print Network [OSTI]

Cognitive Single Carrier Systems: Joint Impact of Multiple Licensed Transceivers Kyeong Jin Kim of interference from multiple licensed transceivers on cognitive underlay single carrier systems is examined, and 3) interference power from the primary transmitters. For this cognitive underlay single carrier

Elkashlan, Maged

491

Single-electron inverter C. P. Heij,a)  

E-Print Network [OSTI]

Single-electron inverter C. P. Heij,a) P. Hadley, and J. E. Mooij Applied Physics and DIMES, Delft for publication 8 December 2000 A single-electron inverter was fabricated that switches from a high output of the inverter, the two single-electron transistors that make up the inverter must exhibit voltage gain. Voltage

492

3D RECONSTRUCTION FROM A SINGLE IMAGE Diego Rother  

E-Print Network [OSTI]

3D RECONSTRUCTION FROM A SINGLE IMAGE By Diego Rother and Guillermo Sapiro IMA Preprint Series. 1 3D Reconstruction from a Single Image Diego Rother and Guillermo Sapiro Abstract-- A probabilistic framework for 3D object reconstruction from a single image is introduced in this work. First

493

A Single-Molecule Study of RNA Catalysis and Folding  

E-Print Network [OSTI]

A Single-Molecule Study of RNA Catalysis and Folding Xiaowei Zhuang,1 * Laura E. Bartley,2 * Hazen and undocks from the ribozyme core was observed directly in single-molecule time trajectories, allowing. These results establish single-molecule fluorescence as a pow- erful tool for examining RNA folding. Virtually

Herschlag, Dan

494

Statistics and Related Topics in Single-Molecule Biophysics  

E-Print Network [OSTI]

Statistics and Related Topics in Single-Molecule Biophysics Hong Qian1 and S.C. Kou2 1 Department macromolecules one at a time in action, the field of single- molecule biophysics has witnessed extensive growth in both experiments and theory since then. A distinct feature of single-molecule biophysics

Borenstein, Elhanan

495

Dependence of single molecule junction conductance on molecular conformation  

E-Print Network [OSTI]

1 Dependence of single molecule junction conductance on molecular conformation Latha Venkataraman1 of a single metal-molecule-metal junction depends not only on the chemical nature of the molecule used in unimolecular devices. Here, using amine link groups13 to form single molecule junctions, we show a clear

Hone, James

496

Single-molecule analysis of DNA-protein complexes  

E-Print Network [OSTI]

Single-molecule analysis of DNA-protein complexes using nanopores Breton Hornblower1,2, Amy Coombs1. In contrast, single-molecule measurements can reveal information masked by ensemble averaging in bulk with single-molecule approaches, hun- dreds of copies of the same complex must be analyzed. This often

Meller, Amit

497

Single-Molecule Dynamics and Mechanisms of Metalloregulators and Metallochaperones  

E-Print Network [OSTI]

Single-Molecule Dynamics and Mechanisms of Metalloregulators and Metallochaperones Peng Chen in using single-molecule fluorescence imaging techniques to identify the mechanisms of metal homeostaticR-family metalloregulators and copper chaperones can fulfill their functions. This work also summarizes other related single-molecule

Chen, Peng

498

Combined single-molecule force and fluorescence measurements for biology  

E-Print Network [OSTI]

Minireview Combined single-molecule force and fluorescence measurements for biology Mark I Wallace, some of which allow cellular processes to be examined at the level of a single molecule. In particular of resolv- ing single molecules in aqueous solution at room tempera- ture [1-7]. Now that the field is over

Wallace, Mark

499

Single-Molecule Circuits with Well-Defined Molecular Conductance  

E-Print Network [OSTI]

Single-Molecule Circuits with Well-Defined Molecular Conductance Latha Venkataraman,*,,| Jennifer E conductance measurements of single molecules. For an alkane diamine series with 2-8 carbon atoms leads to well-defined conductance measurements of a single molecule junction in a statistical study

Hone, James

500

The Relation between Structure and Quantum Interference in Single Molecule  

E-Print Network [OSTI]

The Relation between Structure and Quantum Interference in Single Molecule Junctions Troels pathways has recently attracted increased interest as an enabling tool for single- molecule electronic) to control the current flow through single-molecule devices has recently intensified.1-14 The idea

Thygesen, Kristian