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

Wave Energy Extraction from buoys  

E-Print Network [OSTI]

Different types of Wave Energy Converters currently tested or under development are using the vertical movement of floating bodies to generate electricity. For commercial applications, arrays have to be considered in order ...

Garnaud, Xavier

2009-01-01T23:59:59.000Z

2

Direct Drive Wave Energy Buoy  

SciTech Connect (OSTI)

The most prudent path to a full-scale design, build and deployment of a wave energy conversion (WEC) system involves establishment of validated numerical models using physical experiments in a methodical scaling program. This Project provides essential additional rounds of wave tank testing at 1:33 scale and ocean/bay testing at a 1:7 scale, necessary to validate numerical modeling that is essential to a utility-scale WEC design and associated certification.

Rhinefrank, Kenneth E. [Columbia Power Technologies, Inc.; Lenee-Bluhm, Pukha [Columbia Power Technologies, Inc.; Prudell, Joseph H. [Columbia Power Technologies, Inc.; Schacher, Alphonse A. [Columbia Power Technologies, Inc.; Hammagren, Erik J. [Columbia Power Technologies, Inc.; Zhang, Zhe [Columbia Power Technologies, Inc.

2013-07-29T23:59:59.000Z

3

Scaled modeling and simulation of ocean wave linear generator buoy systems.  

E-Print Network [OSTI]

??Accurate scaled modeling and simulation are critical to advancing ocean wave linear generator buoys. A 100th scaled model of ocean wave generator buoy systems is… (more)

Gore, Ganesh P.

2006-01-01T23:59:59.000Z

4

Columbia Power Technologies, Inc. Deploys its Direct Drive Wave Energy Buoy  

Office of Energy Efficiency and Renewable Energy (EERE)

Columbia Power Technologies, Inc. is working to advance their wave energy buoy to commercial readiness.

5

Evaluation of wave energy generation from buoy heave response based on linear generator concepts  

Science Journals Connector (OSTI)

Previous studies of linear generator power extraction from ocean waves have usually ignored the buoy heave dynamics and taken the linear generator movement to coincide with the wave motion. Here the actual buoy motion is first determined and then used to solve the coupled hydrodynamic and electromagnetic problem of electrical power generation for both regular and irregular waves. Several buoy sizes are modeled to exploit the buoys' natural frequency in an attempt to create a greater heave response for a given sea state. Power output ranging from 75 to 375?W is predicted for the dimensions chosen.

M. A. Stelzer; R. P. Joshi

2012-01-01T23:59:59.000Z

6

MHK Technologies/Ocean Wave Power Spar Buoy Engine | Open Energy  

Open Energy Info (EERE)

Spar Buoy Engine Spar Buoy Engine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Wave Power Spar Buoy Engine.jpg Technology Profile Primary Organization Functional Design Engineering Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Submerged Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description A long period spar buoy supports a subsurface flow augmentor The augmentor directs water from the wave s submarine flow field to a free prime mover piston The prime mover is decoupled from the machine s PTO during times in the wave s cycle when there is little power available for conversion Wave energy is stored in the device until the is enough flow magnetude that power take off can efficiently take place Power can be taken off as high pressure water crankshaft torque or directly as DC electricity

7

Experimental Testing and Model Validation for Ocean Wave Energy Harvesting Buoys  

E-Print Network [OSTI]

for large scale grid power applications, but rather for relatively low-power ocean sensor and communicationsExperimental Testing and Model Validation for Ocean Wave Energy Harvesting Buoys Douglas A. Gemme1 Island Department of Ocean Engineering Narragansett, RI 02882, USA Abstract-- Methodology and results

Grilli, Stéphan T.

8

Experimental and Numerical Study of Spar Buoy-magnet/spring Oscillators Used as Wave Energy Annette R. Grilli  

E-Print Network [OSTI]

Experimental and Numerical Study of Spar Buoy-magnet/spring Oscillators Used as Wave Energy at least one short-stroke linear generator (SSLG), made of a magnet, suspended to a spring, and oscillating within a coil. This system is aimed at producing low and renewable wave power (up to ¢ £ ¤ ¥ k

Grilli, Stéphan T.

9

Bragg scattering and wave-power extraction by an array of small buoys  

Science Journals Connector (OSTI)

...studies have been devoted to the potential of power extraction from sea waves by an isolated...Mei et al. 2005; Cruz 2008). To achieve power output comparable to a conventional power plant or a wind-turbine farm, a large array of absorbing...

2010-01-01T23:59:59.000Z

10

A Spar Buoy for High-Frequency Wave Measurements and Detection of Wave Breaking in the Open Ocean  

Science Journals Connector (OSTI)

Waves and wave breaking play a significant role in the air–sea exchanges of momentum, sea spray aerosols, and trace gases such as CO2, but few direct measurements of wave breaking have been obtained in the open ocean (far from the coast). This ...

Robin W. Pascal; Margaret J. Yelland; Meric A. Srokosz; Bengamin I. Moat; Edward M. Waugh; Daniel H. Comben; Alex G. Cansdale; Mark C. Hartman; David G. H. Coles; Ping Chang Hsueh; Timothy G. Leighton

2011-04-01T23:59:59.000Z

11

NOAA Data Buoy Office Programs  

Science Journals Connector (OSTI)

The NOAA Data Buoy Office (NDBO) buoys provide vital meteorological and oceanographic reports from data-sparse marine areas. To provide a better understanding of the scope and potential of the buoy system, the buoy network, monitoring ...

Glenn D. Hamilton

1980-09-01T23:59:59.000Z

12

MHK Technologies/Finavera Buoy | Open Energy Information  

Open Energy Info (EERE)

Finavera Buoy Finavera Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Finavera Buoy.jpg Technology Profile Primary Organization Oregon Iron Works Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description MARINE DIVISION Oregon Iron Works Inc OIW has a globally recognized Marine Division with a wide range of advanced accomplishments from custom design prototype development Fabricate OPT Power Take Off 2007 Design Build Finavera Buoy 2007 Fabricate OPT Next Generation Buoy 2008 2009 large scale production outfitting electrical mechanical hydraulic pneumatic

13

MHK Technologies/IPS OWEC Buoy | Open Energy Information  

Open Energy Info (EERE)

IPS OWEC Buoy IPS OWEC Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage IPS OWEC Buoy.jpg Technology Profile Primary Organization Interproject Service AB Technology Resource Click here Wave Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The IPS OWEC Offshore Wave Energy Converter Buoy is a system for generating electricity from ocean waves at a cost competitive with fossil fuel generated power Cluster of buoys gives energy and act as wave breaker Off shore wave energy converters and systems with great flexibility Units from 10 kW 150 kW annual mean power A new interesting alternative for the internal energy conversion is based on a set of hose pumps driven by the piston in the acceleration tube pumping water to a small turbine directly coupled to a special generator

14

Comparison and analysis of Envisat ASAR ocean wave spectra with buoy data in the northern Pacific Ocean  

Science Journals Connector (OSTI)

The validation and assessment of Envisat advanced synthetic aperture radar (ASAR) ocean wave spectra products are important to their application in ocean wave numerical predictions. Six-year ASAR wave ... co-loca...

Qifeng Ren ???; Jie Zhang ??…

2011-01-01T23:59:59.000Z

15

MHK Technologies/WAG Buoy | Open Energy Information  

Open Energy Info (EERE)

WAG Buoy WAG Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage WAG Buoy.jpg Technology Profile Primary Organization Ryokuseisha Corporation Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Wave Activated Generator Buoy By using the wave activated generator as the power supply for a buoy excellent economic and maintenance power saving properties are realized There is a complete line from mid size models for use with harbor engineering works to large models for use as actual channel markers The solar cell and the all purpose type hybrid type can also be used Technology Dimensions

16

MHK Technologies/PowerBuoy | Open Energy Information  

Open Energy Info (EERE)

PowerBuoy PowerBuoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage PowerBuoy.jpg Technology Profile Primary Organization Oregon Wave Energy Partners LLC Project(s) where this technology is utilized *MHK Projects/Coos Bay OPT Wave Park *MHK Projects/Cornwall Wave Hub *MHK Projects/Griffin Project *MHK Projects/NJBPU 1 5 MW Demonstration Program *MHK Projects/Orkney *MHK Projects/Reedsport OPT Wave Park *MHK Projects/Reedsport OPT Wave Park Expanded Project *MHK Projects/Santona Wave Energy Park *MHK Projects/US Navy Wave Energy Technology WET Program at Marine Corps Base Hawaii MCBH Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 9: Commercial-Scale Production / Application

17

MHK Technologies/Electric Buoy | Open Energy Information  

Open Energy Info (EERE)

Buoy Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Electric Buoy.jpg Technology Profile Primary Organization Aqua Magnetics Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description AMI s Ocean Swell and Wave Energy Conversion OSWEC device uses a patented linear generator to directly convert the motion of ocean swells and waves into electric power In our initial designs the generator mounts underneath a floating buoy or on the surface of a platform with the buoy below however it is possible to fit the generator on other types of wave motion energy extracting mechanisms Housing moves up and down with the motion of the Buoy on the ocean s surface while the Damping Plates hold the Generator Coil in a stable position The relative motion between the magnetic field in the generator housing and Generator Coil creates an electric voltage in the Generator Coil After four design evolutions Aqua Magnetics Inc has created our patented reciprocating linear generator Scalable for a wide range of applications and able to operate in a wide range of sea states Generator prototype will produce approximately 10 watts of power in 15 cm 6 inch wind chop in the intraco

18

MHK Technologies/Direct Drive Power Generation Buoy | Open Energy  

Open Energy Info (EERE)

Power Generation Buoy Power Generation Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Direct Drive Power Generation Buoy.jpg Technology Profile Primary Organization Columbia Power Technologies Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description Direct drive point absorber In 2005 Oregon State University entered into an exclusive license agreement with Columbia Power Technologies to jointly develop a direct drive wave energy conversion device Designed to be anchored 2 5 miles off the Oregon coast in 130 feet of water it uses the rise and fall of ocean waves to generate electricity Mooring Configuration Anchored

19

MHK Technologies/The B1 buoy | Open Energy Information  

Open Energy Info (EERE)

buoy buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage The B1 buoy.gif Technology Profile Primary Organization Fred Olsen Ltd Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Proprietary Mooring Configuration Proprietary Technology Dimensions Technology Nameplate Capacity (MW) Proprietary Device Testing Scale Test *Currently undergoing open sea testing scaled device Previous tests carried out in the sea with scaled devices 1 20 1 10 and 1 3 scale including the use of the research rig Buldra Lab Test *Various tests performed both in dry conditions and in wave test tanks 1 33 1 20 1 3

20

MHK Technologies/OE Buoy OE 50 | Open Energy Information  

Open Energy Info (EERE)

OE Buoy OE 50 OE Buoy OE 50 < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage OE Buoy OE 50.jpg Technology Profile Primary Organization Ocean Energy Ltd Project(s) where this technology is utilized *MHK Projects/Ocean Energy Galway Bay IE *MHK Projects/OE Buoy OE 30 Technology Resource Click here Wave Technology Type Click here Oscillating Water Column Technology Readiness Level Click here TRL 7/8: Open Water System Testing & Demonstration & Operation Technology Description The OEBuoy device uses wave energy to compress air in a plenum chamber and pump it through an air turbine system. This isolates the power conversion system from the seawater and also provides a high-speed air flow to the turbine. The device is a floating system with the mouth of the OWC facing away from the wave direction. This results in high energy efficiencies at the operating point because of the motions of the float system relative to the waves.

Note: This page contains sample records for the topic "wave buoy hk" 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

MHK Technologies/AquaBuoy | Open Energy Information  

Open Energy Info (EERE)

AquaBuoy AquaBuoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage AquaBuoy.jpg Technology Profile Primary Organization Finavera Renewables Ocean Energy Ltd Project(s) where this technology is utilized *MHK Projects/Figueira da Foz Portugal *MHK Projects/Humboldt County Wave Project *MHK Projects/Makah Bay Offshore Wave Pilot Project *MHK Projects/South Africa *MHK Projects/Ucluelet BC Canada Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The Aquabuoy 2.0 is a large 3 meter wide buoy tied to a 70-foot-long shaft. By bobbing up and down, the water is rushed into an acceleration tube, which in turn causes a piston to move. This moving of the piston causes a steel reinforced rubber hose to stretch, making it act as a pump. The water is then pumped into a turbine which in turns powers a generator. The electricity generated is brought to shore via a standard submarine cable.

22

Experimental analysis of an energy self sufficient ocean buoy utilizing a bi-directional turbine  

E-Print Network [OSTI]

An experimental analysis of a Venturi shrouded hydro turbine for wave energy conversion. The turbine is designed to meet the specific power requirements of a, Woods Hole Oceanographic Institute offshore monitoring buoy ...

Gruber, Timothy J. (Timothy James)

2012-01-01T23:59:59.000Z

23

MHK Technologies/SeaRaser buoy seawater pump | Open Energy Information  

Open Energy Info (EERE)

SeaRaser buoy seawater pump SeaRaser buoy seawater pump < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage SeaRaser buoy seawater pump.jpg Technology Profile Primary Organization Dartmouth Wave Energy Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description SEARASER uses wave displacement to lift a float attached to a piston and uses gravity in the wave s following trough to push the piston back down It is different from other wecs as it is tethered to a weight on the seabed by a single flexible tether but utilises a double acting piston thereby producing volumes of pressurised water in both directions of the piston

24

Columbia Power Technologies, Inc. Deploys its Direct Drive Wave...  

Energy Savers [EERE]

Columbia Power Technologies, Inc. Deploys its Direct Drive Wave Energy Buoy Columbia Power Technologies, Inc. Deploys its Direct Drive Wave Energy Buoy April 9, 2013 - 12:00am...

25

15 2 1 2013 Union Press ccchan@eee.hku.hk  

E-Print Network [OSTI]

17 LTO LTO LTO LTO Altairnano, 2012 Wave energy Wind energy Geothermal energy Wind energy Modern biomass energy Solar energy Geothermal energy #12;18 Studies in Science15 2 1 2013 Union Press ccchan@eee.hku.hk ln.jian@siat.ac.cn Correlation between energy

Leung, Ka-Cheong

26

Autonomous buoy for seismic reflection data acquisition in the inaccessible parts of the Arctic Ocean  

E-Print Network [OSTI]

Autonomous buoy for seismic reflection data acquisition in the inaccessible parts of the Arctic Instrumentation, Bergen, Norway An autonomous buoy which collects seismic reflection data and transmits to shore of the seismic buoy (thick red, green and black lines). - we have successfully developed an autonomous buoy

Kristoffersen, Yngve

27

Wind Wave Float | Department of Energy  

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

(TRL 1 2 3 Component) Ocean Power Technologies (TRL 5 6 System) - PB500, 500 kW Utility-Scale PowerBuoy Project WaveBob (TRL 5 6 System) - Advanced Wave Energy Conversion Project...

28

Small Buoys for Energy Harvesting : Experimental and Numerical Modeling Studies  

E-Print Network [OSTI]

of a permanent magnet, suspended to a spring, oscillating within a (two-phase) coil), whose armature motion. A rod, attached to the LEG magnetic armature, exits through the bottom of the canister and connects to its bottom, oscillates as a result of buoy heave through coupled resonance. Hence, LEG oscillations

Grilli, Stéphan T.

29

Comparing TRMM rainfall retrieval with NOAA buoy rain gauge data  

E-Print Network [OSTI]

to December of 2001. TRMM's 3G68 product provides instantaneous rain rate data averaged over 0.5? x 0.5? latitude-longitude grid boxes for the TRMM Microwave Imager (TMI), Precipitation Radar (PR), and a combined algorithm (COMB). The buoy's rain rate data...

Phillips, Amy Blackmore

2002-01-01T23:59:59.000Z

30

Heaving buoys, point absorbers and arrays  

Science Journals Connector (OSTI)

...09576509JPE751 ) 52 Hals, J. SubmittedPractical limits to the power that can be captured from ocean waves by oscillating bodies 53 Rademakers, L. W. M. M. , R. G. van Schie, R. Schuitema, B. Vriesema, and F. Gardner2000Physical model testing for characterising...

2012-01-01T23:59:59.000Z

31

MHK Projects/OE Buoy OE 30 | Open Energy Information  

Open Energy Info (EERE)

OE Buoy OE 30 OE Buoy OE 30 < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.8037,"lon":-124.76,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

32

Failure analysis of a Calm buoy anchor chain system  

SciTech Connect (OSTI)

In 1982, Philippines-Cities Service experienced a wear failure of a cateneary anchor chain mooring used to moor a CALM type buoy. In order to explain the failure, Cities Service conducted a comprehensive failure analysis and model basin test of the failed system, and in addition, performed comparative wear tests on U3 and U4 chain. The results of the investigation indicate that interlink motion and resulting wear are an important design criteria for mooring lines.

Shoup, G.J.; Mueller, R.A.

1984-05-01T23:59:59.000Z

33

Abstract 1285: The effects of the HK5-ferritin interaction and iron on tumor angiogenesis  

Science Journals Connector (OSTI)

...provide oxygen and nutrients and remove waste products. The imperfect blood vessels...Our laboratory has shown that the iron storage protein ferritin binds to HK5, inhibiting...ferritin with the HK5 protein with the long-term goal of developing inhibitors of the HK5-ferritin...

Annissa J. Huhn; Derek Parsonage; Suzy V. Torti; and Thomas Hollis

2011-01-10T23:59:59.000Z

34

AUTONOMOUS MOBILE BUOY (A-M-B) COASTAL & LAGOON: autonomous monitoring and sampling  

E-Print Network [OSTI]

AUTONOMOUS MOBILE BUOY (A-M-B) COASTAL & LAGOON: autonomous monitoring and sampling PI: Stephen, goals and objectives The project objective of this proposal is to develop an Autonomous Mobile Buoy student built instrumentation and autonomous/remotely operated vehicles that will be deployed, monitored

Wood, Stephen L.

35

Experimental studies of the hydrodynamic characteristics of a sloped wave energy device   

E-Print Network [OSTI]

Many wave energy convertors are designed to use either vertical (heave) or horizontal (surge) movements of waves. But the frequency response of small heaving buoys and oscillating water column devices shows that they are ...

Lin, Chia-Po

2000-07-19T23:59:59.000Z

36

Navy Catching Waves in Hawaii | Department of Energy  

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

Navy Catching Waves in Hawaii Navy Catching Waves in Hawaii Navy Catching Waves in Hawaii June 2, 2010 - 11:56am Addthis This experimental power-generating buoy installed off the coast of Oahu can produce enough energy to power 25 homes under optimal conditions. | Photo courtesy of Ocean Power Technologies, Inc. This experimental power-generating buoy installed off the coast of Oahu can produce enough energy to power 25 homes under optimal conditions. | Photo courtesy of Ocean Power Technologies, Inc. To a casual observer, the buoy off the shore of Marine Corps Base Hawaii (MCBH) might look like nothing more than a bright yellow spot in a blue ocean. But this isn't an ordinary buoy - it's a small electrical generator, creating renewable electricity as it bobs up and down on the waves. It's also a test project by the U.S. Navy to see whether a wider

37

Oregon Wave Energy Partners LLC | Open Energy Information  

Open Energy Info (EERE)

PowerBuoy This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleOregonWaveEnergyPartnersLLC&oldid76930...

38

regulation. Buoys and ship-based sensors are normally used to measure the amount of  

E-Print Network [OSTI]

regulation. Buoys and ship-based sensors are normally used to measure the amount of water the concept by building electronic components such as field-effect transistors. MATERIALS SCIENCE Bettercoats

Heller, Eric

39

Quantifying the Hygroscopic Growth of Marine Boundary Layer Aerosols by Satellite-base and Buoy Observations  

Science Journals Connector (OSTI)

In this study, collocated satellite and buoy observations as well as satellite observations over an extended region during 2006-2010 were used to quantify the humidity effects on marine boundary layer (MBL) aerosols. Although the near-surface ...

Tao Luo; Renmin Yuan; Zhien Wang; Damao Zhang

40

Wave Power Demonstration Project at Reedsport, Oregon  

SciTech Connect (OSTI)

Ocean wave power can be a significant source of large?scale, renewable energy for the US electrical grid. The Electrical Power Research Institute (EPRI) conservatively estimated that 20% of all US electricity could be generated by wave energy. Ocean Power Technologies, Inc. (OPT), with funding from private sources and the US Navy, developed the PowerBuoy? to generate renewable energy from the readily available power in ocean waves. OPT's PowerBuoy converts the energy in ocean waves to electricity using the rise and fall of waves to move the buoy up and down (mechanical stroking) which drives an electric generator. This electricity is then conditioned and transmitted ashore as high?voltage power via underwater cable. OPT's wave power generation system includes sophisticated techniques to automatically tune the system for efficient conversion of random wave energy into low cost green electricity, for disconnecting the system in large waves for hardware safety and protection, and for automatically restoring operation when wave conditions normalize. As the first utility scale wave power project in the US, the Wave Power Demonstration Project at Reedsport, OR, will consist of 10 PowerBuoys located 2.5 miles off the coast. This U.S. Department of Energy Grant funding along with funding from PNGC Power, an Oregon?based electric power cooperative, was utilized for the design completion, fabrication, assembly and factory testing of the first PowerBuoy for the Reedsport project. At this time, the design and fabrication of this first PowerBuoy and factory testing of the power take?off subsystem are complete; additionally the power take?off subsystem has been successfully integrated into the spar.

Mekhiche, Mike [Principal Investigator] [Principal Investigator; Downie, Bruce [Project Manager] [Project Manager

2013-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

http://occr.christiantimes.org.hk/art_0123.htm 1 Christianity and Culture  

E-Print Network [OSTI]

http://occr.christiantimes.org.hk/art_0123.htm 1 Christianity and Culture Jerry Solomon Jerry Solomon field ministries Probe Ministries "Mind Games" College Prep Criswell College University measurement, statistics and methodological studies Cisco Systems PDF PDF html

Yu, Alex

42

Working Group Reports A Short-Wave Radiometer Array Across  

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

9 9 Working Group Reports A Short-Wave Radiometer Array Across the Tropical Pacific Ocean as a Component of the TOGA-TAO Buoy Array R. M. Reynolds Brookhaven National Laboratory Upton, New York Introduction The purpose of this document is to bring together pertinent information concerning the NOAA TOGA-TAO buoy array so that a decision can be made for the following questions: 1. Are the scientific gains from an array of short-wave radiation sensors in the equatorial Pacific Ocean sufficiently impelling that DOE/ARM should provide financial and material support to NOAA/PMEL to install and operate this array? 2. What scientists and/or scientific studies would directly benefit from such a data set? 3. What should that array look like? That is, what sub-set of buoys should be so implemented given the per-buoy

43

The Signature of Inertial and Tidal Currents in Offshore Wave Records  

Science Journals Connector (OSTI)

The roughness of the sea surface can be affected by strong currents. Here, long records of surface wave heights from buoy observations in the northeastern Pacific Ocean are examined. The data show the influence of tidal currents, but the first ...

Johannes Gemmrich; Chris Garrett

2012-06-01T23:59:59.000Z

44

In situ Monitoring of Cyanobacterial HABs in Western Lake Erie using Buoy-mounted Sensors  

E-Print Network [OSTI]

In situ Monitoring of Cyanobacterial HABs in Western Lake Erie using Buoy-mounted Sensors Primary for the rest of the western basin of Lake Erie. We propose to deploy environmental sensors at these sites. The first sensor is a fluorescence-based detector of phycocyanin, a pigment found predominantly

45

Generation of random numbers on graphics processors: Forced indentation in silico of the bacteriophage HK97  

E-Print Network [OSTI]

, University of Massachusetts, Lowell, MA, 01854 2Department of Mathematics, University of Massachusetts, and Lagged Fibonacci algorithms on the GPU. We profiled the performance of these generators in terms subsecond timescale using realistic force- loads. We found that the mechanical response of HK97 critically

Barsegov, Valeri

46

Draft Genome Sequence of the Polycyclic Aromatic Hydrocarbon-Degrading, Genetically Engineered Bioluminescent Bioreporter Pseudomonas fluorescens HK44  

SciTech Connect (OSTI)

Pseudomonas fluorescens strain HK44 (DSM 6700) is a genetically engineered lux-based bioluminescent bioreporter. Here we report the draft genome sequence of strain HK44. Annotation of {approx}6.1 Mb sequence indicates that 30% of the traits are unique and distributed over 5 genomic islands, a prophage and two plasmids.

Chauhan, Archana [ORNL; Layton, Alice [University of Tennessee, Knoxville (UTK); Williams, Daniel W [ORNL; Smart, Abby E. [University of Tennessee, Knoxville (UTK); Ripp, Steven Anthony [ORNL; Karpinets, Tatiana V [ORNL; Brown, Steven D [ORNL; Sayler, Gary Steven [ORNL

2011-01-01T23:59:59.000Z

47

MHK Technologies/Wave Catcher | Open Energy Information  

Open Energy Info (EERE)

Wave Catcher.png Wave Catcher.png Technology Profile Primary Organization Offshore Islands Ltd Technology Resource Click here Current Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The Wave Catcher can be orientated to take advantage of the most numerous prevailing waves to generate power It is a long surface buoy cylinder that is lifted by each passing wave As the cylinder is lifted it pulls on its anchor lines which in turn pulls on a support pulley This support pulley turns the generator s rotor and flywheel The generator s flywheel keeps the rotor turning until the next wave lifts up the cylinder and the anchor line once again turns the pulley The cylinder will also be lifted by waves from all directions As a result the anchor cables at each end of the buoy may either pull together or at slightly different times The gears the pulleys the rotor and flywheel are turned when the anchor cable s tension is high The uni direction pulley s re coil spring re winds the anchor cable back around the pulley when the buoy moves down with the trough of the wave and the anchor cable tension is low The wave generator can be in a surface buoy or mounted sub

48

MHK Technologies/Neptune Triton Wave | Open Energy Information  

Open Energy Info (EERE)

Triton Wave Triton Wave < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Neptune Triton Wave.jpg Technology Profile Primary Organization Neptune Renewable Energy Ltd Project(s) where this technology is utilized *MHK Projects/Neptune Renewable Energy 1 10 Scale Prototype Pilot Test *MHK Projects/Humber St Andrews Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The Triton operates in the near-shore and consists of an axi-asymmetrical buoy attached to an A-frame piled into the sea bed. The axi-asymmetrical buoy is designed to generate a counter-phase upstream wave and a much reduced downstream wave, which maximizes capture from the wave and improves overall efficiency. In order to tune the buoy to the incident wave regime, the mass can be controlled by pumping sea water into and out of the hollow cavity inside the buoy. Power take-off is achieved via a piston and hydraulic arrangement.

49

MHK Projects/OSU Direct Drive Power Generation Buoys | Open Energy  

Open Energy Info (EERE)

OSU Direct Drive Power Generation Buoys OSU Direct Drive Power Generation Buoys < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.6472,"lon":-124.127,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

50

Detiding DART buoy data for real-time extraction of source coefficients for operational tsunami forecasting  

E-Print Network [OSTI]

U.S. Tsunami Warning Centers use real-time bottom pressure (BP) data transmitted from a network of buoys deployed in the Pacific and Atlantic Oceans to tune source coefficients of tsunami forecast models. For accurate coefficients and therefore forecasts, tides at the buoys must be accounted for. In this study, five methods for coefficient estimation are compared, each of which accounts for tides differently. The first three subtract off a tidal prediction based on (1) a localized harmonic analysis involving 29 days of data immediately preceding the tsunami event, (2) 68 pre-existing harmonic constituents specific to each buoy, and (3) an empirical orthogonal function fit to the previous 25 hrs of data. Method (4) is a Kalman smoother that uses method (1) as its input. These four methods estimate source coefficients after detiding. Method (5) estimates the coefficients simultaneously with a two-component harmonic model that accounts for the tides. The five methods are evaluated using archived data from eleven...

Percival, Donald B; Eble, Marie C; Gica, Edison; Huang, Paul Y; Mofjeld, Harold O; Spillane, Michael C; Titov, Vasily V; Tolkova, Elena I

2014-01-01T23:59:59.000Z

51

Hydrodynamic principles of wave power extraction  

Science Journals Connector (OSTI)

...Despite the abundance of wave power in the sea, technologies...extraction share with offshore wind power at least two similar challenges...present, the estimated power-generating capacity of...20-40 buoys to match a wind turbine of 2MW capacity...

2012-01-01T23:59:59.000Z

52

Transformation from SDSS Photometric System to Johnson-Morgan-Cousins System in HK Survey  

E-Print Network [OSTI]

We calculate the transformation from the Sloan Digital Sky Survey (SDSS) photometric system to the Johnson-Morgan-Cousins System in the HK Survey. This research was done in late 2001, so the SDSS photometry was taken from the database prior to the release of DR1. This paper is being posted because it is referenced in other papers in the literature, but will not be submitted to a refereed journal because it uses unpublished versions of the catalogs.

Chongshan Zhao; Heidi Jo Newberg

2006-12-01T23:59:59.000Z

53

Waves  

E-Print Network [OSTI]

Waves is the supporting document to the Master of Fine Arts thesis exhibition of the same title. Exhibited March 7-12 2010 in the Art and Design Gallery at the University of Kansas, Waves was comprised of a series of mixed media drawings...

LaCure, Mari Mae

2010-04-29T23:59:59.000Z

54

Wave Energy Conversion Technology  

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

Wave Energy Conversion Technology Wave Energy Conversion Technology Speaker(s): Mirko Previsic Date: August 2, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Julie Osborn Scientists have been working on wave power conversion for the past twenty years, but recent advances in offshore and IT technologies have made it economically competitive. Sea Power & Associates is a Berkeley-based renewable energy technology company. We have developed patented technology to generate electricity from ocean wave energy using a system of concrete buoys and highly efficient hydraulic pumps. Our mission is to provide competitively priced, non-polluting, renewable energy for coastal regions worldwide. Mirko Previsic, founder and CEO, of Sea Power & Associates will discuss ocean wave power, existing technologies for its conversion into

55

Ice Mass Balance Buoys: A tool for measuring and attributing changes in the thickness of the Arctic sea ice cover  

E-Print Network [OSTI]

Ice Mass Balance Buoys: A tool for measuring and attributing changes in the thickness of the Arctic sea ice cover Jacqueline A. Richter-Menge1 , Donald K. Perovich1 , Bruce C. Elder1 , Keran Claffey1 Abstract Recent observational and modeling studies indicate that the Arctic sea ice cover is undergoing

Rigor, Ignatius G.

56

Wave power absorption: Experiments in open sea and simulation  

Science Journals Connector (OSTI)

A full scale prototype of a wave power plant based on a direct drive linear generator driven by a point absorber has been installed at the west coast of Sweden. In this paper experimentally collected data of energy absorption for different electrical loads are used to verify a model of the wave power plant including the interactions of wave buoy generator and external load circuit. The wave-buoy interaction is modeled with linear potential wavetheory. The generator is modeled as a nonlinear mechanical damping function that is dependent on piston velocity and electric load. The results show good agreement between experiments and simulations. Potential wavetheory is well suited for the modeling of a point absorber in normal operation and for the design of future converters. Moreover the simulations are fast which opens up for simulations of wave farms.

M. Eriksson; R. Waters; O. Svensson; J. Isberg; M. Leijon

2007-01-01T23:59:59.000Z

57

The many-body problem A solution: DFT HK theorems KS scheme Summary Key concepts in Density Functional Theory (I)  

E-Print Network [OSTI]

's University, Belfast Key concepts in Density Functional Theory (I) Silvana Botti #12;The many-body problem concepts in Density Functional Theory (I) Silvana Botti #12;The many-body problem A solution: DFT HK theorems KS scheme Summary Outline 1 The many-body problem 2 A solution: Density Functional Theory 3

Botti, Silvana

58

Advanced, High Power, Next Scale, Wave Energy Conversion Device  

SciTech Connect (OSTI)

The project conducted under DOE contract DE?EE0002649 is defined as the Advanced, High Power, Next Scale, Wave Energy Converter. The overall project is split into a seven?stage, gated development program. The work conducted under the DOE contract is OPT Stage Gate III work and a portion of Stage Gate IV work of the seven stage product development process. The project effort includes Full Concept Design & Prototype Assembly Testing building on our existing PowerBuoy? technology to deliver a device with much increased power delivery. Scaling?up from 150kW to 500kW power generating capacity required changes in the PowerBuoy design that addressed cost reduction and mass manufacturing by implementing a Design for Manufacturing (DFM) approach. The design changes also focused on reducing PowerBuoy Installation, Operation and Maintenance (IO&M) costs which are essential to reducing the overall cost of energy. In this design, changes to the core PowerBuoy technology were implemented to increase capability and reduce both CAPEX and OPEX costs. OPT conceptually envisaged moving from a floating structure to a seabed structure. The design change from a floating structure to seabed structure would provide the implementation of stroke? unlimited Power Take?Off (PTO) which has a potential to provide significant power delivery improvement and transform the wave energy industry if proven feasible.

Mekhiche, Mike [Principal Investigator] [Principal Investigator; Dufera, Hiz [Project Manager] [Project Manager; Montagna, Deb [Business Point of Contact] [Business Point of Contact

2012-10-29T23:59:59.000Z

59

An Open Ocean Trial of Controlled Upwelling Using Wave Pump Technology  

Science Journals Connector (OSTI)

In 1976, John D. Isaacs proposed to use wave energy to invert the density structure of the ocean and pump deep, nutrient-rich water into the sunlit surface layers. The basic principle is simple: a length of tubing attached to a surface buoy at ...

Angelicque White; Karin Björkman; Eric Grabowski; Ricardo Letelier; Steve Poulos; Blake Watkins; David Karl

2010-02-01T23:59:59.000Z

60

MHK Technologies/Uppsala Seabased AB Wave Energy Converter | Open Energy  

Open Energy Info (EERE)

AB Wave Energy Converter AB Wave Energy Converter < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Uppsala Seabased AB Wave Energy Converter.jpg Technology Profile Primary Organization Uppsala University Division for Electricity Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description The system consists of a linear permanent magnet synchronous generator located on the sea floor The generator is connected directly via a line to a buoy on the surface There are no intermediate energy conversion steps thus the generator motion is the same as the buoy motion Several generators 3 today are connected to a marine substation where the voltage is converted to grid frequency transformed to higher voltage and transmitted to shore All electrical cables throughout the system are fixed i e there are no motions that subject the cables to bending moments

Note: This page contains sample records for the topic "wave buoy hk" 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

MHK Technologies/Wave Rider | Open Energy Information  

Open Energy Info (EERE)

Rider Rider < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Rider.jpg Technology Profile Primary Organization Seavolt Technologies Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The company s Wave Rider system uses buoys and hydraulic pumps to convert the movement of ocean waves into electricity Electricity is generated via small turbines powered by hydraulic circuits which captures the energy of the wave and converts it into high pressure hydraulic fluid flow spinning the turbines to generate electricity Technology Dimensions Device Testing Date Submitted 19:42.1 << Return to the MHK database homepage

62

MHK Technologies/Ocean Wave Energy Converter OWEC | Open Energy Information  

Open Energy Info (EERE)

Converter OWEC Converter OWEC < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Wave Energy Converter OWEC.jpg Technology Profile Primary Organization Ocean Wave Energy Company Technology Resource Click here Wave Technology Type Click here Point Absorber - Submerged Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Neutrally suspended and positively buoyant modules are quick connected into open frame networks Submerged portions are stabilized by variable ballast buoyancy chambers and optional damper sheets situated at a relatively calm depth Frame members carry shaft components of linear rotary converters associated with large point absorber buoys Both directions of reciprocal wave motion i e vertical and horizontal motion directly drive components of counter rotating electrical generators Compared to standard generators wherein one is associated with upstroke and another of smaller proportion with downstroke this configuration increases relative speed with fewer parts Electromechanical loads are real time adjustable with respect to wave sensor web resulting in optimal energy conversion from near fully submerged wave following buoys Electrical conductors are series connected and further quick connected with those of other modules via upper frame members Through implementation of rep

63

A comparison of observed and modeled surface waves in southern Lake Michigan and the implications for models of sediment resuspension.  

SciTech Connect (OSTI)

Subsurface pressure sensors were used to make measurements of surface waves during 18 deployments in southern Lake Michigan between 1998 and 2000. Most of the observations were made during the unstratified period (November--May) in water depths between 10 and 55 m. The observations (as well as those obtained from the National Data Buoy Center (NDBC) buoy 45007, which is located in the middle of the southern basin of the lake) were compared to the results obtained from the Great Lakes Environmental Research Laboratory (GLERL)-Donelan wave model implemented on a 2-km grid. The results show that the wave model does a good job of calculating the wave heights, but consistently underestimates the wave periods. In over 80% of the cases the bottom stresses calculated from both the observations and the wave model results agree as to whether or not resuspension occurs, but over 70% of this agreement is for cases when resuspension does not occur; both stresses predict resuspension about 6% of the time. Since the bottom stresses calculated from the model results are usually lower than those calculated from the observations, resuspension estimates based on the wave model parameters are also lower than those calculated from the observed waves.

Hawley, N.; Lesht, B. M.; Schwab, D. J.; Environmental Research; Great Lakes Environmental Research Lab

2004-06-25T23:59:59.000Z

64

Energy Department Announces $10 Million for Full-Scale Wave Energy Device Testing  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department, in coordination with the Navy, today announced funding for two companies to test their innovative wave energy conversion devices in new deep water test berths off the waters of the Navy’s Marine Corps Base Hawaii. Ocean Energy USA will leverage lessons learned from previous quarter-scale test deployments that have led to design improvements for a full-scale deployment of their Ocean Energy Buoy. Northwest Energy Innovations will build and test a full-scale model of its Azura device.

65

MHK Technologies/Wave Treader fixed | Open Energy Information  

Open Energy Info (EERE)

MHK Technologies/Wave Treader fixed MHK Technologies/Wave Treader fixed < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Treader fixed.jpg Technology Profile Primary Organization Green Ocean Energy Ltd Project(s) where this technology is utilized *MHK Projects/Development of Ocean Treader Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description The Wave Treader concept utilises the arms and sponsons from Ocean Treader and instead of reacting against a floating Spar Buoy, will react through an Interface Structure onto the Foundation of an Offshore Wind Turbine. Between the Arms and the Interface Structure hydraulic cylinders are mounted and as the wave passes the machine first the forward Sponson will lift and fall and then the aft Sponson will lift and fall each stroking their hydraulic cylinder in turn. This pressurises hydraulic fluid which is then smoothed by hydraulic accumulators before driving a hydraulic motor which in turn drives an electricity generator. The electricity is then exported through the cable shared with the Wind Turbine.

66

Wave energy  

Science Journals Connector (OSTI)

Waves receive their energy from the wind by means of a ... whose yield is not yet clearly understood. Energy in the wave is more concentrated than in the wind ... density. For this reason a motor utilizing wave p...

Ferruccio Mosetti

1982-01-01T23:59:59.000Z

67

2011 Waves -1 STANDING WAVES  

E-Print Network [OSTI]

-multiple of the wavelength: n 2 L ,n 1,2,... . A vibrating string is an example of a transverse wave: its oscillation2011 Waves - 1 STANDING WAVES ON A STRING The objectives of the experiment are: · To show that standing waves can be set up on a string. · To determine the velocity of a standing wave. · To understand

Glashausser, Charles

68

Electrical damping of linear generators for wave energy converters—A review  

Science Journals Connector (OSTI)

Abstract The electrical damping of point-absorber wave energy converters is crucial to optimize the power output. Many circuit topologies have been proposed, but the possible increase in power absorption must be weighed against parameters such as cost, reliability and control system complexity. In this paper, the known electrical damping circuits are categorized, described and compared. The hydrodynamic damping of the buoy is covered, and how a linear generator can be used as a power take-off unit to apply a damping force. A qualitative comparison of the circuits is presented in the end. A more complex and costly power electronics system may be viable for wave energy converters (WECs) of large-scale power rating. However, for farm operation with small-scale WECs, a simpler and passive damping may be more suitable.

Rickard Ekström; Boel Ekergård; Mats Leijon

2015-01-01T23:59:59.000Z

69

Wave-actuated power take-off device for electricity generation  

SciTech Connect (OSTI)

Since 2008, Resolute Marine Energy, Inc. (RME) has been engaged in the development of a rigidly moored shallow-water point absorber wave energy converter, the "3D-WEC". RME anticipated that the 3D-WEC configuration with a fully buoyant point absorber buoy coupled to three power take off (PTO) units by a tripod array of tethers would achieve higher power capture than a more conventional 1-D configuration with a single tether and PTO. The investigation conducted under this program and documented herein addressed the following principal research question regarding RME'Â?Â?s power take off (PTO) concept for its 3D-WEC: Is RME's winch-driven generator PTO concept, previously implemented at sub-scale and tested at the Ohmsett wave tank facility, scalable in a cost-effective manner to significant power levels Â?Â?e.g., 10 to 100kW?

Chertok, Allan

2013-01-31T23:59:59.000Z

70

The wave energy resource along Australia’s Southern margin  

Science Journals Connector (OSTI)

The Southern Australian margin is one of the most energetic regions in the world suitable for the extraction of waveenergy for electricity generation. We have produced a data set in which the deep-water waveenergy resource for the region is described by three representative deep-water wave states equivalent to the 10th 50th and 90th percentiles of the deep-water waveenergy flux derived from archives of the USA National Oceanic and Atmospheric Administration (NOAA) WaveWatch III (NWW3) operational wavemodel. The Simulating WAves Nearshore (SWAN) wavemodel is then applied along the full Southern Australian margin to propagate these representative wave states into the near-shore region to quantify the effects of shallow water processes such as refraction shoaling and bottom friction. The waveenergy incident on the 25-m isobath ( ? 30 – 50 ? kW / m ) is approximately 35%–50% less than the World Energy Council estimates of offshore waveenergy but is approximately 20% greater than the energy observed from long-term buoy deployments on the midshelf. The latter discrepancy is attributed to an overestimation of significant wave height along the Southern Australian margin by the NWW3 model. The near-shore model applied in this study adequately simulates the attenuation of wave heights across the continental shelf when compared with estimates of wave height attenuation obtained from the Topex satellite altimeter. The attenuation of waveenergy across the continental shelf reduces the estimates of offshore waveenergy as given by the World Energy Council; however the waveenergy resource incident on the Southern Australian margin remains considerable. We estimate that if 10% of the incident near-shore energy in this region which is an ambitious target when conversion efficiency is considered were converted to electricity approximately 130 TW?h/yr (one-half of Australia’s total present-day electricity consumption) would be produced.

M. A. Hemer; D. A. Griffin

2010-01-01T23:59:59.000Z

71

Ocean Wave Energy Company OWECO | Open Energy Information  

Open Energy Info (EERE)

Energy Company OWECO Energy Company OWECO Jump to: navigation, search Name Ocean Wave Energy Company (OWECO) Place Bristol, Rhode Island Sector Ocean Product Wave energy device developer. The company has patented the OWEC Ocean Wave Energy Converter®., a device consisting of a submerged array, suspended at depths permitting full reciprocation of buoys and respective driveshafts. Coordinates 42.55678°, -88.050449° 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":42.55678,"lon":-88.050449,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

72

Sound transmission through the internal?wave field: The inverse problem.  

Science Journals Connector (OSTI)

Buoyed by the early success of ocean acoustictomography for ocean mapping and of path integral theory combined with the Garrett–Munk internal?wave model for explaining acoustic fluctuations Flatte and others could not resist the temptation of using statistical moments of the acoustic field to learn something about the spatial and temporal distributions of oceaninternal waves. Indeed internal waves are of intense oceanographic interest because of their relation to tides eddies (which account for 99% of the ocean kinetic energy) and the mixing processes that maintain the thermocline. Because of the integrating property of acoustics and the sensitivity of certain acoustic observables to different parts of the internal?wave spectrum acoustical techniques like those described by Flatte offer a unique view into internal?wave behavior. Recent acoustic and oceanographic measurements made in the Philippine Sea using a large vertical aperture array and high temporal sampling may provide the first field demonstration of internal?wave tomography progress of which would be quite pleasing to Flatte.

John Colosi

2009-01-01T23:59:59.000Z

73

wave energy  

Science Journals Connector (OSTI)

wave energy ? Wellenenergie f [Die einer Schwerewelle innewohnende potentielle und kinetische Energie. Sie ist etwa proportional dem Quadrat der Wellenhöhe. Zeichen: E we ...

2014-08-01T23:59:59.000Z

74

Vacuum Waves  

E-Print Network [OSTI]

As an example of the unification of gravitation and particle physics, an exact solution of the five-dimensional field equations is studied which describes waves in the classical Einstein vacuum. While the solution is essentially 5D in nature, the waves exist in ordinary 3D space, and may provide a way to test for an extra dimension.

Paul S. Wesson

2012-12-11T23:59:59.000Z

75

Estimating wave energy from a wave record  

Science Journals Connector (OSTI)

This note is concerned with the calculation of wave energy from a time series record of wave heights. Various methods are used to estimate the wave energy. For wave records that contain a number of different ... ...

Sasithorn Aranuvachapun; John A. Johnson

1977-01-01T23:59:59.000Z

76

Coherence waves  

Science Journals Connector (OSTI)

In 1955 Wolf noticed that the mutual coherence function ? obeys two wave equations [Proc. R. Soc. London230, 246 (1955)]. The physical optics of this finding is thoroughly presented in...

Lohmann, Adolf W; Mendlovic, David; Shabtay, Gal

1999-01-01T23:59:59.000Z

77

Wave represents displacement Wave represents pressure Source -Sound Waves  

E-Print Network [OSTI]

Wave represents displacement Wave represents pressure Source - Sound Waves Distance between crests is wavelength Number of crests passing a point in 1 second is frequency Wave represents pressure Target - Radio Waves Distance between crests is wavelength Number of crests passing a point in 1 second is frequency

Colorado at Boulder, University of

78

Long Wave/Short Wave Resonance in Equatorial Waves  

Science Journals Connector (OSTI)

It is shown that resonant coupling between ultra long equatorial Rossby waves and packets of either short Rossby or short westward-traveling gravity waves is possible. Simple analytic formulas give the discrete value of the packet wave number k, ...

John P. Boyd

1983-03-01T23:59:59.000Z

79

Rogue waves for a long wave-short wave resonance model with multiple short waves  

E-Print Network [OSTI]

1 Rogue waves for a long wave-short wave resonance model with multiple short waves Hiu Ning Chan (1 waves; Long-short resonance PACS Classification: 02.30.Jr; 05.45.Yv; 47.35.Fg #12;2 ABSTRACT A resonance between long and short waves will occur if the phase velocity of the long wave matches the group velocity

80

Vortices in Brain waves  

E-Print Network [OSTI]

2003). Vortices in Brain Waves 62. M. E. Raichle, ScienceVORTICES IN BRAIN WAVES WALTER J. FREEMAN Department ofthat is recorded in brain waves (electroencephalogram, EEG).

Freeman, Walter J III; Vitiello, Giuseppe

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Plane waves Lumped systems  

E-Print Network [OSTI]

1 Impedance · Plane waves ­ Lumped systems S x y z Impedance · Plane waves ­ Lumped systems · open tube #12;2 Impedance · Plane waves ­ Lumped systems · closed tube Impedance · Cylindrical waves z x y r #12;3 Impedance · Cylindrical waves ­ Circumferential part n=0 n=1 n=2 n=3 Impedance · Cylindrical

Berlin,Technische Universität

82

Reference Model 6 (RM6): Oscillating Wave Energy Converter.  

SciTech Connect (OSTI)

This report is an addendum to SAND2013-9040: Methodology for Design and Economic Analysis of Marine Energy Conversion (MEC) Technologies. This report describes an Oscillating Water Column Wave Energy Converter reference model design in a complementary manner to Reference Models 1-4 contained in the above report. In this report, a conceptual design for an Oscillating Water Column Wave Energy Converter (WEC) device appropriate for the modeled reference resource site was identified, and a detailed backward bent duct buoy (BBDB) device design was developed using a combination of numerical modeling tools and scaled physical models. Our team used the methodology in SAND2013-9040 for the economic analysis that included costs for designing, manufacturing, deploying, and operating commercial-scale MEC arrays, up to 100 devices. The methodology was applied to identify key cost drivers and to estimate levelized cost of energy (LCOE) for this RM6 Oscillating Water Column device in dollars per kilowatt-hour (%24/kWh). Although many costs were difficult to estimate at this time due to the lack of operational experience, the main contribution of this work was to disseminate a detailed set of methodologies and models that allow for an initial cost analysis of this emerging technology. This project is sponsored by the U.S. Department of Energy's (DOE) Wind and Water Power Technologies Program Office (WWPTO), within the Office of Energy Efficiency & Renewable Energy (EERE). Sandia National Laboratories, the lead in this effort, collaborated with partners from National Laboratories, industry, and universities to design and test this reference model.

Bull, Diana L; Smith, Chris; Jenne, Dale Scott; Jacob, Paul; Copping, Andrea; Willits, Steve; Fontaine, Arnold; Brefort, Dorian; Gordon, Margaret Ellen; Copeland, Robert; Jepsen, Richard A.

2014-10-01T23:59:59.000Z

83

Overwash induced by storm conditions  

E-Print Network [OSTI]

wave height and period from offshore buoy in January,abcde abcd2004.......................................................................................................................53 3.19 Observed significant wave height and period from... offshore buoy inabcdef abcdFebruary, 2004......................................................................................................53 3.20 Observed significant wave height and period from offshore buoy in April,abcdef abcd2004...

Park, Young Hyun

2009-05-15T23:59:59.000Z

84

PROPAGATING WAVES ALONG SPICULES  

SciTech Connect (OSTI)

Alfvenic waves are thought to play an important role in coronal heating and acceleration of solar wind. Here we investigate the statistical properties of Alfvenic waves along spicules (jets that protrude into the corona) in a polar coronal hole using high-cadence observations of the Solar Optical Telescope on board Hinode. We developed a technique for the automated detection of spicules and high-frequency waves. We detected 89 spicules and found (1) a mix of upward propagating, downward propagating, as well as standing waves (occurrence rates of 59%, 21%, and 20%, respectively); (2) the phase speed gradually increases with height; (3) upward waves dominant at lower altitudes, standing waves at higher altitudes; (4) standing waves dominant in the early and late phases of each spicule, while upward waves were dominant in the middle phase; (5) in some spicules, we find waves propagating upward (from the bottom) and downward (from the top) to form a standing wave in the middle of the spicule; and (6) the medians of the amplitude, period, and velocity amplitude were 55 km, 45 s, and 7.4 km s{sup -1}, respectively. We speculate that upward propagating waves are produced near the solar surface (below the spicule) and downward propagating waves are caused by reflection of (initially) upward propagating waves off the transition region at the spicule top. The mix of upward and downward propagating waves implies that exploiting these waves to perform seismology of the spicular environment requires careful analysis and may be problematic.

Okamoto, Takenori J. [National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); De Pontieu, Bart, E-mail: joten.okamoto@nao.ac.jp [Lockheed Martin Solar and Astrophysics Laboratory, B/252, 3251 Hanover Street, Palo Alto, CA 94304 (United States)

2011-08-01T23:59:59.000Z

85

Kelvin Waves around Antarctica  

Science Journals Connector (OSTI)

The Southern Ocean allows circumpolar structure and the Antarctic coastline plays a role as a waveguide for oceanic Kelvin waves. Under the cyclic conditions, the horizontal wavenumbers and frequencies for circumpolarly propagating waves are ...

Kazuya Kusahara; Kay I. Ohshima

2014-11-01T23:59:59.000Z

86

Gravity perturbed Crapper waves  

Science Journals Connector (OSTI)

...waves are known to have multi-valued height. Using...gravity-capillary waves with multi-valued height. The...of single-valued and multi-valued travelling waves...absence of gravity, a family of exact solutions is...elliptic functions. Building upon the work by Tanveer...

2014-01-01T23:59:59.000Z

87

Performance Assessment of the Wave Dragon Wave Energy Converter  

E-Print Network [OSTI]

Performance Assessment of the Wave Dragon Wave Energy Converter Based on the EquiMar Methodology S of the wave energy sector, device developers are called to provide reliable estimates on power performanceMar, Nissum Bredning, Hanstholm, North Sea, Ekofisk, Wave-to-wire, Wave energy. I. INTRODUCTION The wave

Hansen, René Rydhof

88

The Effect of Wave Breaking on the Wave Energy Spectrum  

Science Journals Connector (OSTI)

The effect of wave breaking on the wave energy spectral shape is examined. The Stokes wave-breaking criterion is first extended to random waves and a breaking wave model is established in which the elevation of breaking waves is expressed in ...

C. C. Tung; N. E. Huang

1987-08-01T23:59:59.000Z

89

Sandia National Laboratories: Innovation Activities  

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

demands. Presently, real-time wave measurement buoys are available at costs in excess of 50,000 per buoy. The high cost limits the ability to deploy large networks of...

90

Comparison between third and second generation ocean wave models  

E-Print Network [OSTI]

. This is accomplished by adjusting the CPSD to agree with linear theory. The 2-D buoy spectrum with 40 frequency bands and 72 direction bands is estimated using the Maximum Likelihood Method (MLM) (Capon 1969; Isobe et aL 1984; Brissette and Tsanis 1994) applied... to the CPSD. More accurate methods for estimating the 2-D spectra from pitch-roll- heave buoys exist, but the MLM method's computational efficiency and robust behavior make it a practical choice for processing large amounts of data. One important MLM...

Bratos, Steven Martin

2012-06-07T23:59:59.000Z

91

Hysteresis of ionization waves  

SciTech Connect (OSTI)

A quasi-logistic, nonlinear model for ionization wave modes is introduced. Modes are due to finite size of the discharge and current feedback. The model consists of competing coupled modes and it incorporates spatial wave amplitude saturation. The hysteresis of wave mode transitions under current variation is reproduced. Sidebands are predicted by the model and found in experimental data. The ad hoc model is equivalent to a general--so-called universal--approach from bifurcation theory.

Dinklage, A. [Max-Planck-Institut fuer Plasmaphysik, EURATOM-Association, Wendelsteinstr. 1, 17491 Greifswald (Germany); Bruhn, B.; Testrich, H. [Institut fuer Physik, E.-M.-Arndt Universitaet Greifswald, Felix-Hausdorff-Str. 6, 17487 Greifswald (Germany); Wilke, C. [Leibniz-Institut fuer Plasmaforschung und Technologie, Felix-Hausdorff-Str. 2, 17489 Greifswald (Germany)

2008-06-15T23:59:59.000Z

92

Wave momentum flux parameter: a descriptor for nearshore waves  

E-Print Network [OSTI]

Wave momentum flux parameter: a descriptor for nearshore waves Steven A. Hughes* US Army Engineer Available online 7 October 2004 Abstract A new parameter representing the maximum depth-integrated wave momentum flux occurring over a wave length is proposed for characterizing the wave contribution

US Army Corps of Engineers

93

Shallow Water Waves and Solitary Waves Willy Hereman  

E-Print Network [OSTI]

Shallow Water Waves and Solitary Waves Willy Hereman Department of Mathematical and Computer of the Subject II. Introduction­Historical Perspective III. Completely Integrable Shallow Water Wave Equations IV. Shallow Water Wave Equations of Geophysical Fluid Dynamics V. Computation of Solitary Wave Solutions VI

Hereman, Willy A.M.

94

Matter Waves and Electricity  

Science Journals Connector (OSTI)

Classical four-dimensional relativity gives a most natural and harmonious interpretation of the three basic phenomena of nature: gravity, electricity, and the wave structure of matter, provided that the basic assumptions of the Einsteinian theory are modified in two respects: (1) the fundamental invariant of the action principle is chosen as a quadratic instead of a linear function of the curvature components; (2) the static equilibrium of the world is replaced by a dynamic equilibrium. Electricity comes out as a second-order resonance effect of the matter waves. The matter waves are gravitational waves but superposed not on an empty Euclidean space but on a space of high average curvature.

Cornelius Lanczos

1942-06-01T23:59:59.000Z

95

kinetic wave energy  

Science Journals Connector (OSTI)

kinetic wave energy ? kinetische Wellenenergie f [Teil der Wellenlänge, die im Feld der Orbitalgeschwindigkeiten unter der Welle enthalten ist und als Orbitalbewegung am Ort verbleibt

2014-08-01T23:59:59.000Z

96

potential wave energy  

Science Journals Connector (OSTI)

potential wave energy ? potentielle Wellenenergie f [Der für die Auslenkung des Wasserspiegels zum Ruhewasserspiegel erforderliche Teil der Wellenenergie, die mit der Wellengeschwindigkeit fortbewegt...

2014-08-01T23:59:59.000Z

97

Wave runup on cylinders subject to deep water random waves  

E-Print Network [OSTI]

was measured close to the test cylinders are analyzed. These data on wave runup in deepwater random waves were generated at similar water depths with significant wave heights and spectral peak periods. Statistical parameters, zero crossing analysis...

Indrebo, Ann Kristin

2012-06-07T23:59:59.000Z

98

Wave Energy Resource Analysis for Use in Wave Energy Conversion  

E-Print Network [OSTI]

In order to predict the response of wave energy converters an accurate representation of the wave climate resource is crucial. This paper gives an overview of wave resource modeling techniques as well as detailing a methodology for estimating...

Pastor, J.; Liu, Y.; Dou, Y.

2014-01-01T23:59:59.000Z

99

Free-Wave Energy Dissipation in Experimental Breaking Waves  

Science Journals Connector (OSTI)

Several transient wave trains containing an isolated plunging or spilling breaker at a prescribed location were generated in a two-dimensional wave flume using an energy focusing technique. Surface elevation measurements of each transient wave ...

Eustorgio Meza; Jun Zhang; Richard J. Seymour

2000-09-01T23:59:59.000Z

100

Harmonic generation of gravitational wave induced Alfven waves  

E-Print Network [OSTI]

Here we consider the nonlinear evolution of Alfven waves that have been excited by gravitational waves from merging binary pulsars. We derive a wave equation for strongly nonlinear and dispersive Alfven waves. Due to the weak dispersion of the Alfven waves, significant wave steepening can occur, which in turn implies strong harmonic generation. We find that the harmonic generation is saturated due to dispersive effects, and use this to estimate the resulting spectrum. Finally we discuss the possibility of observing the above process.

Mats Forsberg; Gert Brodin

2007-11-26T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Self-consistent full wave simulations of lower hybrid waves  

E-Print Network [OSTI]

Self-consistent full wave simulations of lower hybrid waves John C. Wright P. T. Bonoli - MIT E .J for Simulation of Wave-Plasma Interactions L.A. Berry, D.B. Batchelor, E.F. Jaeger, E. D`Azevedo D. Green C. Milanesio #12;3 Outline · Introduction to Lower Hybrid waves · Modeling LH waves ­ Ray tracing ­ Full Wave

Wright, John C.

102

Wave energy: a Pacific perspective  

Science Journals Connector (OSTI)

...study by Cornett used wind/wave hindcasting to assess Canada's offshore wave energy resource...will probably attract offshore birds, possibly leading...related projects, such as offshore wind farms. If wave energy development...

2012-01-01T23:59:59.000Z

103

Rainbow trapping of guided waves  

E-Print Network [OSTI]

Rainbow trapping of guided waves Javier Polanco and Rosa M.the propagation of a wave packet that is a superpositionof three s-polarized guided waves with different frequencies

Polanco, Javier; Fitzgerald, Rosa M; Leskova, Tamara A; Maradudin, Alexei A

2011-01-01T23:59:59.000Z

104

Center for Wave Phenomena Wave Phenomena  

E-Print Network [OSTI]

into a life of scientific discovery." Kurang Mehta, Ph.D. Class of 2007 Shell Exploration and Production Phil research and education program in seismic exploration, monitoring and wave propagation. The main focus and efficiency of seismic processing algorithms, especially for application to regions of structural complexity

105

Wave Energy | Open Energy Information  

Open Energy Info (EERE)

List of Wave Energy Incentives Retrieved from "http:en.openei.orgwindex.php?titleWaveEnergy&oldid267203" Category: Articles with outstanding TODO tasks...

106

Wave-wave interactions in solar type III radio bursts  

SciTech Connect (OSTI)

The high time resolution observations from the STEREO/WAVES experiment show that in type III radio bursts, the Langmuir waves often occur as localized magnetic field aligned coherent wave packets with durations of a few ms and with peak intensities well exceeding the strong turbulence thresholds. Some of these wave packets show spectral signatures of beam-resonant Langmuir waves, down- and up-shifted sidebands, and ion sound waves, with frequencies, wave numbers, and tricoherences satisfying the resonance conditions of the oscillating two stream instability (four wave interaction). The spectra of a few of these wave packets also contain peaks at f{sub pe}, 2f{sub pe} and 3 f{sub pe} (f{sub pe} is the electron plasma frequency), with frequencies, wave numbers and bicoherences (computed using the wavelet based bispectral analysis techniques) satisfying the resonance conditions of three wave interactions: (1) excitation of second harmonic electromagnetic waves as a result of coalescence of two oppositely propagating Langmuir waves, and (2) excitation of third harmonic electromagnetic waves as a result of coalescence of Langmuir waves with second harmonic electromagnetic waves. The implication of these findings is that the strong turbulence processes play major roles in beam stabilization as well as conversion of Langmuir waves into escaping radiation in type III radio bursts.

Thejappa, G. [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States); MacDowall, R. J. [NASA/Goddard Space Flight Center, Greenbelt MD 20771 (United States)

2014-02-11T23:59:59.000Z

107

wave | OpenEI  

Open Energy Info (EERE)

9 9 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142281559 Varnish cache server wave Dataset Summary Description This project estimates the naturally available and technically recoverable U.S. wave energy resources, using a 51-month Wavewatch III hindcast database developed especially for this study by National Oceanographic and Atmospheric Administration's (NOAA's) National Centers for Environmental Prediction. For total resource estimation, wave power density in terms of kilowatts per meter is aggregated across a unit diameter circle. Source Electric Power Research Institute (EPRI) Date Released December 05th, 2011 (3 years ago) Date Updated Unknown Keywords

108

SEISMIC WAVES ESTIMATION AND WAVE FIELD DECOMPOSITION WITH FACTOR GRAPHS  

E-Print Network [OSTI]

SEISMIC WAVES ESTIMATION AND WAVE FIELD DECOMPOSITION WITH FACTOR GRAPHS Stefano Maranò Christoph, Dept. Information Technology & Electr. Eng., 8092 Zürich ABSTRACT Physical wave fields are often from sensors of different kinds. In this paper we propose a technique for the analysis of vector wave

Loeliger, Hans-Andrea

109

Taming water waves Case study: Surface Water Waves  

E-Print Network [OSTI]

Taming water waves Case study: Surface Water Waves Few things in nature are as dramatic, and potentially dangerous, as ocean waves. The impact they have on our daily lives extends from shipping to the role they play in driving the global climate. From a theoretical viewpoint water waves pose rich

110

Selfconsistent full wave simulations of lower hybrid waves  

E-Print Network [OSTI]

Selfconsistent full wave simulations of lower hybrid waves John C. Wright P. T. Bonoli MIT E .J. Porkolab Sherwood/Spring APS Denver May 2009 #12; 2 Participants in the Center for Simulation of Wave hybrid (LH) waves have the attractive property of damping strongly via electron Landau resonance

Wright, John C.

111

On Generating Gravity Waves with Matter and Electromagnetic Waves  

E-Print Network [OSTI]

If a homogeneous plane light-like shell collides head-on with a homogeneous plane electromagnetic shock wave having a step-function profile then no backscattered gravitational waves are produced. We demonstrate, by explicit calculation, that if the matter is accompanied by a homogeneous plane electromagnetic shock wave with a step-function profile then backscattered gravitational waves appear after the collision.

C. Barrabes; P. A. Hogan

2008-04-05T23:59:59.000Z

112

Traveling-wave photodetector  

SciTech Connect (OSTI)

The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on the transmission line. This velocity synchronization provides the traveling-wave photodetector with a large electrical bandwidth and a high quantum efficiency, because of the effective extended volume for optical absorption. The traveling-wave photodetector also provides large power dissipation, because of its large physical size.

Hietala, V.M.; Vawter, G.A.

1992-12-31T23:59:59.000Z

113

WaveBob (TRL 5 6 System) - Advanced Wave Energy Conversion Project...  

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

WaveBob (TRL 5 6 System) - Advanced Wave Energy Conversion Project WaveBob (TRL 5 6 System) - Advanced Wave Energy Conversion Project WaveBob (TRL 5 6 System) - Advanced Wave...

114

Mathematical Caricature of Large Waves  

E-Print Network [OSTI]

The Kadomtsev-Petviiashvili equation is considered as a mathematical caricature of large and rogue waves.

Mikhail Kovalyov

2014-03-21T23:59:59.000Z

115

Clustering of floaters by waves  

E-Print Network [OSTI]

We study experimentally how waves affect distribution of particles that float on a water surface. We show that clustering of small particles in a standing wave is a nonlinear effect with the clustering time decreasing as the square of the wave amplitude. In a set of random waves, we show that small floaters concentrate on a multi-fractal set.

P. Denissenko; G. Falkovich; S. Lukaschuk

2005-11-22T23:59:59.000Z

116

December 2010 | 23 GUIDED WAVES  

E-Print Network [OSTI]

December 2010 | 23 GUIDED WAVES Tuning Wave Dispersion in Resonant Networks Eyal Feigenbaum with meta-atoms. Resonant guided wave networks (RGWNs) are a new class of artificial photonic material,5 distinct from photonic crystals and metamateri- als, in which localized waves resonate in closed paths

Atwater, Harry

117

Selection Rules for the Nonlinear Interactions of Internal Gravity Waves and Inertia-Gravity Waves  

E-Print Network [OSTI]

Internal Gravity Waves . . . . . . . . . . . . . . 3.2.1 Twodimensional inertia-gravity wave physics . . . . . . . . .Three dimensional inertia-gravity wave physics . . . . . .

Jiang, Chung-Hsiang

2010-01-01T23:59:59.000Z

118

Various Boussinesq solitary wave solutions  

SciTech Connect (OSTI)

The generalized Boussinesq (gB) equations have been used to model nonlinear wave evolution over variable topography and wave interactions with structures. Like the KdV equation, the gB equations support a solitary wave solution which propagates without changing shape, and this solitary wave is often used as a primary test case for numerical studies of nonlinear waves using either the gB or other model equations. Nine different approximate solutions of the generalized Boussinesq equations are presented with simple closed form expressions for the wave elevation and wave speed. Each approximates the free propagation of a single solitary wave, and eight of these solutions are newly obtained. The author compares these solutions with the well known KdV solution, Rayleigh`s solution, Laitone`s higher order solution, and ``exact`` numerical integration of the gB equations. Existing experimental data on solitary wave shape and wave speed are compared with these models.

Yates, G.T. [Univ. of Hong Kong (Hong Kong). Dept. of Mechanical Engineering

1995-12-31T23:59:59.000Z

119

Noise sustained waves in subexcitable media: From chemical waves to brain waves  

E-Print Network [OSTI]

Noise sustained waves in subexcitable media: From chemical waves to brain waves P. Junga: a subexcitable photosensitive Belousov­Zhabotinsky reaction, hippocampal slices of rat brains, and astrocyte of such a behavior for calcium wave net- works in interconnected brain cells. I. INTRODUCTION Since the early days

Showalter, Kenneth

120

Explosive plane-wave lens  

DOE Patents [OSTI]

An explosive plane-wave air lens which enables a spherical wave form to be converted to a planar wave without the need to specially machine or shape explosive materials is described. A disc-shaped impactor having a greater thickness at its center than around its periphery is used to convert the spherical wave into a plane wave. When the wave reaches the impactor, the center of the impactor moves first because the spherical wave reaches the center of the impactor first. The wave strikes the impactor later in time as one moves radially along the impactor. Because the impactor is thinner as one moves radially outward, the velocity of the impactor is greater at the periphery than at the center. An acceptor explosive is positioned so that the impactor strikes the acceptor simultaneously. Consequently, a plane detonation wave is propagated through the acceptor explosive. 4 figs.

Marsh, S.P.

1988-03-08T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Explosive plane-wave lens  

DOE Patents [OSTI]

An explosive plane-wave air lens which enables a spherical wave form to be converted to a planar wave without the need to specially machine or shape explosive materials is described. A disc-shaped impactor having a greater thickness at its center than around its periphery is used to convert the spherical wave into a plane wave. When the wave reaches the impactor, the center of the impactor moves first because the spherical wave reaches the center of the impactor first. The wave strikes the impactor later in time as one moves radially along the impactor. Because the impactor is thinner as one moves radially outward, the velocity of the impactor is greater at the periphery than at the center. An acceptor explosive is positioned so that the impactor strikes the acceptor simultaneously. Consequently, a plane detonation wave is propagated through the acceptor explosive. 3 figs., 3 tabs.

Marsh, S.P.

1987-03-12T23:59:59.000Z

122

Explosive plane-wave lens  

DOE Patents [OSTI]

An explosive plane-wave air lens which enables a spherical wave form to be converted to a planar wave without the need to specially machine or shape explosive materials is described. A disc-shaped impactor having a greater thickness at its center than around its periphery is used to convert the spherical wave into a plane wave. When the wave reaches the impactor, the center of the impactor moves first because the spherical wave reaches the center of the impactor first. The wave strikes the impactor later in time as one moves radially along the impactor. Because the impactor is thinner as one moves radially outward, the velocity of the impactor is greater at the periphery than at the center. An acceptor explosive is positioned so that the impactor strikes the acceptor simultaneously. Consequently, a plane detonation wave is propagated through the acceptor explosive.

Marsh, Stanley P. (Los Alamos, NM)

1988-01-01T23:59:59.000Z

123

Standing wave compressor  

DOE Patents [OSTI]

A compressor for compression-evaporation cooling systems, which requires no moving parts. A gaseous refrigerant inside a chamber is acoustically compressed and conveyed by means of a standing acoustic wave which is set up in the gaseous refrigerant. This standing acoustic wave can be driven either by a transducer, or by direct exposure of the gas to microwave and infrared sources, including solar energy. Input and output ports arranged along the chamber provide for the intake and discharge of the gaseous refrigerant. These ports can be provided with optional valve arrangements, so as to increase the compressor's pressure differential. The performance of the compressor in either of its transducer or electromagnetically driven configurations, can be optimized by a controlling circuit. This controlling circuit holds the wavelength of the standing acoustical wave constant, by changing the driving frequency in response to varying operating conditions.

Lucas, Timothy S. (4614 River Mill Ct., Glen Allen, VA 23060)

1991-01-01T23:59:59.000Z

124

Adaptive multiconfigurational wave functions  

SciTech Connect (OSTI)

A method is suggested to build simple multiconfigurational wave functions specified uniquely by an energy cutoff ?. These are constructed from a model space containing determinants with energy relative to that of the most stable determinant no greater than ?. The resulting ?-CI wave function is adaptive, being able to represent both single-reference and multireference electronic states. We also consider a more compact wave function parameterization (?+SD-CI), which is based on a small ?-CI reference and adds a selection of all the singly and doubly excited determinants generated from it. We report two heuristic algorithms to build ?-CI wave functions. The first is based on an approximate prescreening of the full configuration interaction space, while the second performs a breadth-first search coupled with pruning. The ?-CI and ?+SD-CI approaches are used to compute the dissociation curve of N{sub 2} and the potential energy curves for the first three singlet states of C{sub 2}. Special attention is paid to the issue of energy discontinuities caused by changes in the size of the ?-CI wave function along the potential energy curve. This problem is shown to be solvable by smoothing the matrix elements of the Hamiltonian. Our last example, involving the Cu{sub 2}O{sub 2}{sup 2+} core, illustrates an alternative use of the ?-CI method: as a tool to both estimate the multireference character of a wave function and to create a compact model space to be used in subsequent high-level multireference coupled cluster computations.

Evangelista, Francesco A., E-mail: francesco.evangelista@emory.edu [Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322 (United States)

2014-03-28T23:59:59.000Z

125

Wave Loading on Floating Platforms by Internal Solitary Waves  

Science Journals Connector (OSTI)

Morison’s equation is used for estimating internal solitary wave-induced forces exerted on SPAR and semi-submersible platforms. And the results we got have also ... estimate internal wave loading even for SPAR an...

H. Q. Zhang; J. C. Li

2009-01-01T23:59:59.000Z

126

Real-time Water Waves with Wave Particles  

E-Print Network [OSTI]

This dissertation describes the wave particles technique for simulating water surface waves and two way fluid-object interactions for real-time applications, such as video games. Water exists in various different forms in our environment...

Yuksel, Cem

2010-10-12T23:59:59.000Z

127

Heat Waves, Global Warming, and Mitigation  

E-Print Network [OSTI]

Heat Waves, Global Warming, and Mitigation Ann E. Carlson*2008]HEAT WAVES, GLOBAL WARMING, AND MITIGATION 175 stroke2001). 2008]HEAT WAVES, GLOBAL WARMING, AND MITIGATION 177

Carlson, Ann E.

2008-01-01T23:59:59.000Z

128

Structural health monitoring by ultrasonic guided waves  

E-Print Network [OSTI]

E. (2005) “Modeling guided wave propagation with applicationMultiple Guided Ultrasonic Wave Features,” ASME Journal ofto-spar joints using guided waves and macro fiber composite

Bartoli, Ivan

2007-01-01T23:59:59.000Z

129

Heat Waves, Global Warming, and Mitigation  

E-Print Network [OSTI]

Heat Waves, Global Warming, and Mitigation Ann E. Carlson*II. HEAT WAVE DEFINITIONS .. A . HCHANGE AND HEAT WAVES .. CLIMATE III. IV. HEAT

Carlson, Ann E.

2008-01-01T23:59:59.000Z

130

Wave refraction and wave energy on Cayo Arenas  

E-Print Network [OSTI]

WAVE REFRACTION AND WAVE ENERGY ON CAYO ARENAS A Thesis By Donald E. Welsh Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... January 1962 Major Subject: Physical Oceanography WAVE REFRACTION AND WAVE ENERGY ON CAYO ARENAS A Thesis Donald E. Walsh Approved as to style and content by: Chairman of the Committee ead of Department ' / January 1962 ACKNOWLEDGMENTS...

Walsh, Donald Eugene

1962-01-01T23:59:59.000Z

131

Assessing wave energy effects on biodiversity: the Wave Hub experience  

Science Journals Connector (OSTI)

...effects of wave energy on biodiversity...accelerate the implementation of wave energy, within a coherent...in the form of wind, wave and tidal...Rajapandian2007A review of wind energy technologiesRenew...emergence and the challenges it facesRefocus...

2012-01-01T23:59:59.000Z

132

Secular Sediment Waves, Channel Bed Waves, and Legacy Sediment  

E-Print Network [OSTI]

Secular Sediment Waves, Channel Bed Waves, and Legacy Sediment L. Allan James* Geography Department, University South Carolina Abstract The concept of sediment waves is reviewed and clarifications are proposed for nomenclature con- cerning vertical channel responses to large fluvial sediment fluxes over a period of a decade

James, L. Allan

133

Plane wave solution for elastic wave scattering by a heterogeneous ...  

E-Print Network [OSTI]

A plane-wave method for computing the three-dimensional scattering of propagating elastic waves ... boundary conditions also called linear slip interface conditions, and therefore, called the ... good agreement between measured waves and theoretical ..... tribution with a mean and a standard deviation of the com-.

2004-05-28T23:59:59.000Z

134

Resuspension of Clays Under Waves  

Science Journals Connector (OSTI)

Owing to their complex form, very small size and relatively low density, clays freshly deposited in a bay are vulnerable to resuspension when agitated by waves. The model of resuspension of clays under wave motio...

Prida Thimakorn

1984-01-01T23:59:59.000Z

135

MHD Waves in Astrophysical Plasma  

Science Journals Connector (OSTI)

The dependence of the wave velocities on the angle ? between the undisturbed field B 0 and the wave vector k is clearly demonstrated in a polar diagram—the phase velocity diagram. In Fig.?15.2, th...

Boris V. Somov

2012-01-01T23:59:59.000Z

136

Elgen Wave | Open Energy Information  

Open Energy Info (EERE)

Elgen Wave Jump to: navigation, search Name: Elgen Wave Region: United States Sector: Marine and Hydrokinetic Website: http:www.elgenwave.com This company is listed in the Marine...

137

Transformative Wave Technologies Kent, Washington  

E-Print Network [OSTI]

Transformative Wave Technologies Kent, Washington www.transformativewave.com #12;#12;North America are shifted to off peak times #12;#12;Transformative Wave Technologies www.transformativewave.com #12

California at Davis, University of

138

The Nonlinear Equatorial Kelvin Wave  

Science Journals Connector (OSTI)

Using the method of strained coordinates, a uniformly valid approximation to the nonlinear equatorial Kelvin wave is derived. It is shown that nonlinear effects are negligible for the Kelvin waves associated with the Gulf of Guinea upwelling. The ...

John P. Boyd

1980-01-01T23:59:59.000Z

139

Spherical waves r Legendre polynomials  

E-Print Network [OSTI]

1 Impedance · Spherical waves r er e e Impedance · Legendre polynomials P0(x) = 1 P1(x) = x P2(x · Spherical waves ­ Spherical Hankel functions hn (2)(kr)=jn(kr)-iyn(kr) Impedance · Spherical waves Order: 0 1 4 Circumferential And azimuthal: 0,0 1,1 3,2 #12;3 Impedance · Spherical waves ­ Arbitrary

Berlin,Technische Universität

140

CHARACTERIZING DANGEROUS WAVES FOR OCEAN WAVE ENERGY CONVERTER SURVIVABILITY Justin Hovland  

E-Print Network [OSTI]

CHARACTERIZING DANGEROUS WAVES FOR OCEAN WAVE ENERGY CONVERTER SURVIVABILITY Justin Hovland ABSTRACT Ocean Wave Energy Converters (OWECs) operating on the water surface are subject to storms at station 139. Keywords: wave energy, survivability, breaking waves, joint distribution, OWEC INTRODUCTION

Haller, Merrick

Note: This page contains sample records for the topic "wave buoy hk" 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

2014 Tube -1 STANDING WAVES  

E-Print Network [OSTI]

2014 Tube - 1 STANDING WAVES IN AN AIR COLUMN The objective of the experiment is: · To study the harmonic structure of standing waves in an air column. APPARATUS: Computer, FFTScope software, PC speaker, meterstick, sound tube apparatus, thermometer, microphone INTRODUCTION traveling wave of sinusoidal shape

Glashausser, Charles

142

GENERATING ELECTRICITY USING OCEAN WAVES  

E-Print Network [OSTI]

GENERATING ELECTRICITY USING OCEAN WAVES A RENEWABLE SOURCE OF ENERGY REPORT FOR THE HONG KONG ELECTRIC COMPANY LIMITED Dr L F Yeung Mr Paul Hodgson Dr Robin Bradbeer July 2007 #12;Ocean Waves and construction of equipment that could measure and log wave conditions and tide levels at Hoi Ha Wan. Prototypes

Bradbeer, Robin Sarah

143

Energy Loss by Breaking waves  

Science Journals Connector (OSTI)

Observations of the frequency of wind wave breaking in deep water are combined with laboratory estimates of the rate of energy loss a from single breaking wave to infer the net rate of energy transfer to the mixed layer from breaking waves, as a ...

S. A. Thorpe

1993-11-01T23:59:59.000Z

144

Extreme wave impinging and overtopping  

E-Print Network [OSTI]

This investigates the velocity fields of a plunging breaking wave impinging on a structure through measurements in a two-dimensional wave tank. As the wave breaks and overtops the structure, so-called green water is generated. The flow becomes multi...

Ryu, Yong Uk

2009-06-02T23:59:59.000Z

145

Electromagnetic WavesElectromagnetic Waves In this chapter we will review selected properties of electromagnetic waves since  

E-Print Network [OSTI]

Electromagnetic WavesElectromagnetic Waves In this chapter we will review selected properties of electromagnetic waves since radar involves the transmission, propagation and scattering of EM waves by various is the electrostatic force between two point charges. #12;Electromagnetic WavesElectromagnetic Waves Electric fields

Rutledge, Steven

146

Charge Density Wave Compounds  

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

Fisher Research Group Fisher Research Group Layered Chalcogenides 29 February 2008 Controlling the Wave by Brad Plummer, SLAC Communications Stanford University researchers working in part at SSRL have discovered a novel set of properties pertaining to a compound of materials called tritellurides. These compounds, composed of three atoms of tellurium and a single atom of one of the rare earth elements, demonstrate unique electronic properties that can be controlled by altering the temperature of the material. The tritellurides display phenomena known as charge density waves (CDW). In a normal conductive metal, electrons persist in a "sea" wherein they are evenly distributed and equally available, or conductive. A CDW occurs under certain circumstances and causes the electrons to clump together, lowering their availability, and thereby lowering the compound's conductivity. Tellurium, when crystallized into quasi-two-dimensional planes and combined with rare earth elements, produces a material with CDWs that can be manipulated and controlled.

147

Waves in Plasmas  

SciTech Connect (OSTI)

Quadratic corrections to the metaplectic formulation of mode conversions. In this work we showed how to systematically deal with quadratic corrections beyond the usual linearization of the dispersion matrix at a conversion. The linearization leads to parabolic cylinder functions as the local approximation to the full-wave behavior, but these do not include the variation in amplitude associated with ray refraction in the neighborhood of the conversion. Hence, the region over which they give a good fit to the incoming and outgoing WKB solutions is small. By including higher order corrections it is possible to provide a much more robust matching. We also showed that it was possible, in principle, to extend these methods to arbitrary order. A new normal form for mode conversion. This is based upon our earlier NSF-DOE-funded work on ray helicity. We have begun efforts to apply these new ideas in practical ray tracing algorithms. Group theoretical foundation of path integrals and phase space representations of wave problems. Using the symbol theory of N. Zobin, we developed a new understanding of path integrals on phase space. The initial goal was to find practical computational tools for dealing with non-standard mode conversions. Along the way we uncovered a new way to represent wave functions directly on phase space without the intermediary of a Wigner function. We are exploring the use of these ideas for numerical studies of conversion, with the goal of eventually incorporating kinetic effects. Wave packet studies of gyroresonance crossing. In earlier work, Huanchun Ye and Allan Kaufman -- building upon ideas due to Lazar Friedland -- had shown that gyroresonance crossings could be treated as a double conversion. This perspective is one we have used for many of our papers since then. We are now performing a detailed numerical comparison between full-wave and ray tracing approaches in the study of minority-ion gyroresonance crossing. In this study, a fast magnetosonic wave -- supported by a majority-ion species such as deuterium -- crosses the resonance layer associated with a minority species, such as hydrogen. By using wave packets instead of harmonic solutions, it becomes easy to see the evolution in k-space of the minority-ion disturbance, and the time delay for emission of the reflected fast-wave packet. Iterated conversion in a cavity. When mode conversion occurs in a cavity where rays are trapped, multiple conversions will occur and the resulting absorption profile will typically have a complicated spatial dependence due to overlapping interference patterns. The goal of this work is to develop fast and efficient ray-based methods for computing the cavity response to external driving, and to compute the spatial absorption profile. We have introduced a new approach that allows us to visualize in great detail the underlying iterated ray geometry, and should lead to simpler methods for identifying parameter values where global changes occur in the qualitative response (e.g. global bifurcations).

Tracy, Eugene R

2009-09-21T23:59:59.000Z

148

Fractional Electromagnetic Waves  

E-Print Network [OSTI]

In the present work we consider the electromagnetic wave equation in terms of the fractional derivative of the Caputo type. The order of the derivative being considered is 0 <\\gamma<1. A new parameter \\sigma, is introduced which characterizes the existence of the fractional components in the system. We analyze the fractional derivative with respect to time and space, for \\gamma = 1 and \\gamma = 1/2 cases.

J. F. Gómez; J. J. Rosales; J. J. Bernal; V. I. Tkach; M. Guía

2011-08-31T23:59:59.000Z

149

Gravitational wave astronomy and cosmology  

E-Print Network [OSTI]

The first direct observation of gravitational waves' action upon matter has recently been reported by the BICEP2 experiment. Advanced ground-based gravitational-wave detectors are being installed. They will soon be commissioned, and then begin searches for high-frequency gravitational waves at a sensitivity level that is widely expected to reach events involving compact objects like stellar mass black holes and neutron stars. Pulsar timing arrays continue to improve the bounds on gravitational waves at nanohertz frequencies, and may detect a signal on roughly the same timescale as ground-based detectors. The science case for space-based interferometers targeting millihertz sources is very strong. The decade of gravitational-wave discovery is poised to begin. In this writeup of a talk given at the 2013 TAUP conference, we will briefly review the physics of gravitational waves and gravitational-wave detectors, and then discuss the promise of these measurements for making cosmological measurements in the near future.

Scott A. Hughes

2014-05-02T23:59:59.000Z

150

Coexisting rogue waves within the (2+1)-component long-wave–short-wave resonance  

Science Journals Connector (OSTI)

The coexistence of two different types of fundamental rogue waves is unveiled, based on the coupled equations describing the (2+1)-component long-wave–short-wave resonance. For a wide range of asymptotic background fields, each family of three rogue wave components can be triggered by using a slight deterministic alteration to the otherwise identical background field. The ability to trigger markedly different rogue wave profiles from similar initial conditions is confirmed by numerical simulations. This remarkable feature, which is absent in the scalar nonlinear Schrödinger equation, is attributed to the specific three-wave interaction process and may be universal for a variety of multicomponent wave dynamics spanning from oceanography to nonlinear optics.

Shihua Chen; Jose M. Soto-Crespo; Philippe Grelu

2014-09-15T23:59:59.000Z

151

Millimeter wave interconnect and slow wave transmission lines in CMOS.  

E-Print Network [OSTI]

??When heading into the millimeter wave frequency band, even wires on CMOS exhibit transmission line effects, this thesis therefore presents models, simulation and measurements for… (more)

Bjørndal, Øystein

2013-01-01T23:59:59.000Z

152

Iterated multidimensional wave conversion  

SciTech Connect (OSTI)

Mode conversion can occur repeatedly in a two-dimensional cavity (e.g., the poloidal cross section of an axisymmetric tokamak). We report on two novel concepts that allow for a complete and global visualization of the ray evolution under iterated conversions. First, iterated conversion is discussed in terms of ray-induced maps from the two-dimensional conversion surface to itself (which can be visualized in terms of three-dimensional rooms). Second, the two-dimensional conversion surface is shown to possess a symplectic structure derived from Dirac constraints associated with the two dispersion surfaces of the interacting waves.

Brizard, A. J. [Dept. Physics, Saint Michael's College, Colchester, VT 05439 (United States); Tracy, E. R.; Johnston, D. [Dept. Physics, College of William and Mary, Williamsburg, VA 23187-8795 (United States); Kaufman, A. N. [LBNL and Physics Dept., UC Berkeley, Berkeley, CA 94720 (United States); Richardson, A. S. [T-5, LANL, Los Alamos, NM 87545 (United States); Zobin, N. [Dept. Mathematics, College of William and Mary, Williamsburg, VA 23187-8795 (United States)

2011-12-23T23:59:59.000Z

153

Gravity Waves in the Sun  

E-Print Network [OSTI]

We present numerical simulations of penetrative convection and gravity wave excitation in the Sun. Gravity waves are self-consistently generated by a convective zone overlying a radiative interior. We produce power spectra for gravity waves in the radiative region as well as estimates for the energy flux of gravity waves below the convection zone. We calculate a peak energy flux in waves below the convection zone to be three orders of magnitude smaller than previous estimates for m=1. The simulations show that the linear dispersion relation is a good approximation only deep below the convective-radiative boundary. Both low frequency propagating gravity waves as well as higher frequency standing modes are generated; although we find that convection does not continually drive the standing g-mode frequencies.

Tamara M. Rogers; Gary A. Glatzmaier

2005-08-25T23:59:59.000Z

154

Quantum Emulation of Gravitational Waves  

E-Print Network [OSTI]

Gravitational waves, as predicted by Einstein's general relativity theory, appear as ripples in the fabric of spacetime traveling at the speed of light. We prove that the propagation of small amplitude gravitational waves in a curved spacetime is equivalent to the propagation of a subspace of electromagnetic states. We use this result to propose the use of entangled photons to emulate the evolution of gravitational waves in curved spacetimes by means of experimental electromagnetic setups featuring metamaterials.

Ivan Fernandez-Corbaton; Mauro Cirio; Alexander Büse; Lucas Lamata; Enrique Solano; Gabriel Molina-Terriza

2014-06-17T23:59:59.000Z

155

e-mail: metzhao@ust.hk Assoc. Prof.,  

E-Print Network [OSTI]

Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China cooler corresponding to the con- denser in the conventional subcritical systems , while the heat absorption remains below the subcritical region. The high working pressure and favorable heat transfer

Zhao, Tianshou

156

A Reconsideration of Matter Waves  

E-Print Network [OSTI]

Matter waves were discovered in the early 20th century from their wavelength, predicted by DeBroglie, Planck's constant divided by the particle's momentum, that is, lmw = h/mv. But, the failure to obtain a reasonable theory for the matter wave frequency resulted somewhat in loss of further interest. It was expected that the frequency of the matter wave should correspond to the particle kinetic energy, that is, fmw = 1/2mv^2/h but the resulting velocity of the matter of the particle, v = fmw x lmw, is that the matter wave moves at one half the speed of the particle, obviously absurd as the particle and its wave must move together. If relativistic mass is used (as it should in any case) the problem remains, the same mass appearing in numerator and denominator and canceling. It is no help to hypothesize that the total energy, not just the kinetic energy, yields the matter wave. That attributes a matter wave to a particle at rest. It also gives the resulting velocity as c^2/v, the wave racing ahead of its particle. A reinterpretation of Einstein's derivation of relativistic kinetic energy (which produced his famous E = mc^2) leads to a valid matter wave frequency and a new understanding of particle kinetics and of the atom's stable orbits.

Roger Ellman

2005-05-16T23:59:59.000Z

157

Topological horseshoes in travelling waves of discretized nonlinear wave equations  

SciTech Connect (OSTI)

Applying the concept of anti-integrable limit to coupled map lattices originated from space-time discretized nonlinear wave equations, we show that there exist topological horseshoes in the phase space formed by the initial states of travelling wave solutions. In particular, the coupled map lattices display spatio-temporal chaos on the horseshoes.

Chen, Yi-Chiuan, E-mail: YCChen@math.sinica.edu.tw [Institute of Mathematics, Academia Sinica, Taipei 10617, Taiwan (China)] [Institute of Mathematics, Academia Sinica, Taipei 10617, Taiwan (China); Chen, Shyan-Shiou, E-mail: sschen@ntnu.edu.tw [Department of Mathematics, National Taiwan Normal University, Taipei 11677, Taiwan (China)] [Department of Mathematics, National Taiwan Normal University, Taipei 11677, Taiwan (China); Yuan, Juan-Ming, E-mail: jmyuan@pu.edu.tw [Department of Financial and Computational Mathematics, Providence University, Shalu, Taichung 43301, Taiwan (China)] [Department of Financial and Computational Mathematics, Providence University, Shalu, Taichung 43301, Taiwan (China)

2014-04-15T23:59:59.000Z

158

Discrete wave turbulence of rotational capillary water waves  

E-Print Network [OSTI]

We study the discrete wave turbulent regime of capillary water waves with constant non-zero vorticity. The explicit Hamiltonian formulation and the corresponding coupling coefficient are obtained. We also present the construction and investigation of resonance clustering. Some physical implications of the obtained results are discussed.

Adrian Constantin; Elena Kartashova; Erik Wahlén

2010-05-12T23:59:59.000Z

159

Laboratory Studies of Nonlinear and Breaking Surface Waves  

E-Print Network [OSTI]

A. Breaking-wave generation . . . . . . . . . . . . . . . .of the wave tank. . . . . . . . . . . . . . . . . . . .On steep gravity waves meeting a vertical wall: a triple

Drazen, David

2006-01-01T23:59:59.000Z

160

Excitation of plasma waves in the ionosphere caused by atmospheric acoustic waves  

Science Journals Connector (OSTI)

The transformation of atmospheric acoustic waves into plasma waves in the ionosphere is investigated. The transformation mechanism is based on plasma wave exitation by growing acoustic waves, when ... is reached....

N. Ya. Kotsarenko; R. Pérez Enríquez; S. V. Koshevaya

Note: This page contains sample records for the topic "wave buoy hk" 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

Experimental studies of irregular water wave component interactions with comparisons to the hybrid wave model  

E-Print Network [OSTI]

computed by Wheeler Stretching and Linear Extrapolation modifications to Linear Random Wave Theory and the Hybrid Wave Model. Extreme wave acceleration fields arc compared with Hybrid Wave Model acceleration fields only. Comparisons between measurements...

Longridge, Jonathon Kent

1993-01-01T23:59:59.000Z

162

Dynamic response analysis of spar buoy floating wind turbine systems  

E-Print Network [OSTI]

The importance of alternative energy development has been dramatically increased by the dwindling supplies of oil and gas, and our growing efforts to protect our environment. A variety of meaningful steps have been taken ...

Lee, Sungho, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

163

Development, Operation, and Results From the Texas Automated Buoy System  

E-Print Network [OSTI]

of the Gulf of Mexico Coastal Ocean Observing System (GCOOS) regional association and the primary source of near-surface current measurements in the northwestern Gulf of Mexico. This article describes the origin of Angolan crude, exploded and caught fire while lightering its cargo about 60 nautical miles south

164

Wave energy technology in China  

Science Journals Connector (OSTI)

...Wave energy technology in China Yage...Energy and Gas Hydrate...wave energy technology, summarizing...of an air turbine rotating at...research, development and construction...variable-pitch air turbine for the Azores...Liu2000Research and development of Daguan...National Ocean Technology Center, Tianjin...

2012-01-01T23:59:59.000Z

165

Tube-wave seismic imaging  

DOE Patents [OSTI]

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Korneev, Valeri A [LaFayette, CA

2009-05-05T23:59:59.000Z

166

Tube-wave seismic imaging  

DOE Patents [OSTI]

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Korneev, Valeri A. (Lafayette, CA); Bakulin, Andrey (Houston, TX)

2009-10-13T23:59:59.000Z

167

Application of wave generator theory to the development of a Wave Energy Converter  

E-Print Network [OSTI]

Application of wave generator theory to the development of a Wave Energy Converter by Maila Sepri approve the attached thesis Application of wave generator theory to the development of a Wave Energy Application of wave generator theory to the development of a Wave Energy Converter by Maila Sepri Principal

Wood, Stephen L.

168

Hinsdale Wave Basin 1 | Open Energy Information  

Open Energy Info (EERE)

Hinsdale Wave Basin 1 Hinsdale Wave Basin 1 Jump to: navigation, search Basic Specifications Facility Name Hinsdale Wave Basin 1 Overseeing Organization Oregon State University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 104.0 Beam(m) 3.7 Depth(m) 4.6 Cost(per day) $3500 Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 1.8 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Monochromatic waves (cnoidal, Stokes, Airy), solitary waves, user-defined free surface timeseries or board displacement timeseries for random waves Wave Direction Uni-Directional Simulated Beach Yes Description of Beach 12' by 12' concrete slabs anchored to flume walls

169

Wave and Tide-Dominated Coasts  

Science Journals Connector (OSTI)

Between the wave- and tide-dominated coastal extremes is a broad spectrum of wave and tide-dominated coasts. These range from settings with high wave energy and perceptible tidal energy associated with a low tida...

Edward J. Anthony

2005-01-01T23:59:59.000Z

170

Electrostatic-plasma-wave energy flux  

E-Print Network [OSTI]

would reduce cross- field wave-energy convection since theor cross-field leakage of wave energy are ap- that thecomposition of electrostatic-wave-energy field degrees of

Amendt, P.; Rostoker, N.

1984-01-01T23:59:59.000Z

171

Scholte waves generated by seafloor topography  

E-Print Network [OSTI]

Seafloor topography can excite strong interface waves called Scholte waves that are often dispersive and characterized by slow propagation but large amplitude. This type of wave can be used to invert for near seafloor shear ...

Zheng, Yingcai

2012-01-01T23:59:59.000Z

172

Second Harmonic Resonance for Equatorial Waves  

Science Journals Connector (OSTI)

Simple, exact analytical conditions for second harmonic resonance between equatorial waves are derived. Such resonance can occur only between two Rossby waves or two westward travelling gravity waves. It is shown that regardless of whether the ...

John P. Boyd

1983-03-01T23:59:59.000Z

173

New wave effects in nonstationary plasma  

SciTech Connect (OSTI)

Through particle-in-cell simulations and analytics, a host of interesting and novel wave effects in nonstationary plasma are examined. In particular, Langmuir waves serve as a model system to explore wave dynamics in plasmas undergoing compression, expansion, and charge recombination. The entire wave life-cycle is explored, including wave excitation, adiabatic evolution and action conservation, nonadiabatic evolution and resonant wave-particle effects, collisional dissipation, and potential laboratory applications of the aforementioned phenomenology.

Schmit, P. F. [Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186 (United States)] [Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186 (United States); Fisch, N. J. [Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544 (United States)] [Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544 (United States)

2013-05-15T23:59:59.000Z

174

Are "EIT Waves" Fast-Mode MHD Waves?  

E-Print Network [OSTI]

We examine the nature of large-scale, coronal, propagating wave fronts (``EIT waves'') and find they are incongruous with solutions using fast-mode MHD plane-wave theory. Specifically, we consider the following properties: non-dispersive single pulse manifestions, observed velocities below the local Alfven speed, and different pulses which travel at any number of constant velocities, rather than at the ``predicted'' fast-mode speed. We discuss the possibility of a soliton-like explanation for these phenomena, and show how it is consistent with the above-mentioned aspects.

M. J. Wills-Davey; C. E. DeForest; J. O. Stenflo

2007-04-23T23:59:59.000Z

175

Dartmouth Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Dartmouth Wave Energy Jump to: navigation, search Name: Dartmouth Wave Energy Region: United Kingdom Sector: Marine and Hydrokinetic Website: http:www.dartmouthwaveenergy This...

176

Wind Waves and Sun | Open Energy Information  

Open Energy Info (EERE)

Waves and Sun Jump to: navigation, search Name: Wind Waves and Sun Region: United States Sector: Marine and Hydrokinetic Website: http:www.windwavesandsun.com This company is...

177

Wave Wind LLC | Open Energy Information  

Open Energy Info (EERE)

Wave Wind LLC Place: Sun Prairie, Wisconsin Zip: 53590 Sector: Services, Wind energy Product: Wisconsin-based wind developer and construction services provider. References: Wave...

178

Heat Waves, Global Warming, and Mitigation  

E-Print Network [OSTI]

Heat Waves, Global Warming, and Mitigation Ann E. Carlson*II. HEAT WAVE DEFINITIONS .. A . HW aves B. Heat-related

Carlson, Ann E.

2008-01-01T23:59:59.000Z

179

Sandia National Laboratories: wave energy converter  

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

wave energy converter Sandia Funded to Model Power Pods for Utility-Scale Wave-Energy Converter On September 16, 2014, in Computational Modeling & Simulation, Energy, News, News &...

180

Mirror force induced wave dispersion in Alfvén waves  

SciTech Connect (OSTI)

Recent hybrid MHD-kinetic electron simulations of global scale standing shear Alfvén waves along the Earth's closed dipolar magnetic field lines show that the upward parallel current region within these waves saturates and broadens perpendicular to the ambient magnetic field and that this broadening increases with the electron temperature. Using resistive MHD simulations, with a parallel Ohm's law derived from the linear Knight relation (which expresses the current-voltage relationship along an auroral field line), we explore the nature of this broadening in the context of the increased perpendicular Poynting flux resulting from the increased parallel electric field associated with mirror force effects. This increased Poynting flux facilitates wave energy dispersion across field lines which in-turn allows for electron acceleration to carry the field aligned current on adjacent field lines. This mirror force driven dispersion can dominate over that associated with electron inertial effects for global scale waves.

Damiano, P. A.; Johnson, J. R. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451 (United States)] [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451 (United States)

2013-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Nondestructive testing using stress waves: wave propagation in layered media  

E-Print Network [OSTI]

The use of stress waves in several civil engineering applications such as nondestructive testing of soil deposits or pavement systems has become extremely popular over the last few years. In all cases, a dynamic impulse is applied to the surface...

Ortega, Jose Alberto

2013-02-22T23:59:59.000Z

182

Branes are Waves and Monopoles  

E-Print Network [OSTI]

In a recent paper it was shown that fundamental strings are null waves in Double Field Theory. Similarly, membranes are waves in exceptional extended geometry. Here the story is continued by showing how various branes are Kaluza-Klein monopoles of these higher dimensional theories. Examining the specific case of the E7 exceptional extended geometry, we see that all branes are both waves and monopoles. Along the way we discuss the O(d; d) transformation of localized brane solutions not associated to an isometry and how true T-duality emerges in Double Field Theory when the background possesses isometries.

David S. Berman; Felix J. Rudolph

2014-09-22T23:59:59.000Z

183

Recirculation in multiple wave conversions  

SciTech Connect (OSTI)

A one-dimensional multiple wave-conversion model is constructed that allows energy recirculation in ray phase space. Using a modular eikonal approach, the connection coefficients for this model are calculated by ray phase-space methods. Analytical results (confirmed numerically) show that all connection coefficients exhibit interference effects that depend on an interference phase, calculated from the coupling constants and the area enclosed by the intersecting rays. This conceptual model, which focuses on the topology of intersecting rays in phase space, is used to investigate how mode conversion between primary and secondary waves is modified by the presence of a tertiary wave.

Kaufman, A. N.; Brizard, A.J.; Kaufman, A.N.; Tracy, E.R.

2008-07-30T23:59:59.000Z

184

Wave Energy Basics | Department of Energy  

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

Wave Energy Basics Wave Energy Basics Wave Energy Basics August 16, 2013 - 4:30pm Addthis Photo of a large wave. Wave energy technologies extract energy directly from surface waves or from pressure fluctuations below the surface. Renewable energy analysts believe there is enough energy in ocean waves to provide up to 2 terawatts of electricity. (A terawatt is equal to a trillion watts.) However, wave energy cannot be harnessed everywhere. Wave power-rich areas of the world include the western coasts of Scotland, northern Canada, southern Africa, and Australia as well as the northeastern and northwestern coasts of the United States. In the Pacific Northwest alone, it is feasible that wave energy could produce 40-70 kilowatts (kW) per 3.3 feet (1 meter) of western coastline. Wave Energy Technologies

185

Hinsdale Wave Basin 2 | Open Energy Information  

Open Energy Info (EERE)

Wave Basin 2 Wave Basin 2 Jump to: navigation, search Basic Specifications Facility Name Hinsdale Wave Basin 2 Overseeing Organization Oregon State University Hydrodynamics Length(m) 48.8 Beam(m) 26.5 Depth(m) 2.1 Water Type Freshwater Cost(per day) $3500 Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.8 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Monochromatic waves (cnoidal, Stokes, Airy), solitary waves, user-defined free surface timeseries or board displacement timeseries for random waves Wave Direction Both Simulated Beach Yes Description of Beach Built to client specifications, currently rigid concrete over gravel fill

186

Sheets Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Sheets Wave Basin Sheets Wave Basin Jump to: navigation, search Basic Specifications Facility Name Sheets Wave Basin Overseeing Organization University of Rhode Island Hydrodynamic Testing Facility Type Wave Basin Length(m) 30.0 Beam(m) 3.6 Depth(m) 1.8 Cost(per day) $750(+ Labor/Materials) Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2.0 Length of Effective Tow(m) 25.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 10 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Pre-programmed for regular and irregular waves, but wavemaker is capable of any input motion. Wave Direction Uni-Directional

187

Haynes Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Wave Basin Wave Basin Jump to: navigation, search Basic Specifications Facility Name Haynes Wave Basin Overseeing Organization Texas A&M (Haynes) Hydrodynamic Testing Facility Type Wave Basin Length(m) 38.1 Beam(m) 22.9 Depth(m) 1.5 Water Type Freshwater Cost(per day) $150/hour (excluding labor) Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Maximum Wave Height(m) at Wave Period(s) 3.3 Maximum Wave Length(m) 10.7 Wave Period Range(s) 3.3 Current Velocity Range(m/s) 0.2 Programmable Wavemaking Yes Wavemaking Description Directional, irregular, any spectrum, cnoidal or solitary wave Wave Direction Both Simulated Beach Yes Description of Beach Stone Channel/Tunnel/Flume Channel/Tunnel/Flume None

188

wave energy | OpenEI  

Open Energy Info (EERE)

99 99 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142281099 Varnish cache server wave energy Dataset Summary Description Source The Wave Energy Resource Assessment project is a joint venture between NREL, EPRI, and Virginia Tech. EPRI is the prime contractor, Virginia Tech is responsible for development of the models and estimating the wave resource, and NREL serves as an independent validator and also develops the final GIS-based display of the data. Source National Renewable Energy Laboratory (NREL) Date Released September 27th, 2011 (3 years ago) Date Updated October 20th, 2011 (3 years ago) Keywords EPRI GIS NREL Puerto Rico shapefile United States Virginia Tech wave energy

189

Gravitational waves: a foundational review  

E-Print Network [OSTI]

The standard linear approach to the gravitational waves theory is critically reviewed. Contrary to the prevalent understanding, it is pointed out that this theory contains many conceptual and technical obscure issues that require further analysis.

J. G. Pereira

2013-07-25T23:59:59.000Z

190

Cluster Dynamics of Planetary Waves  

E-Print Network [OSTI]

The dynamics of nonlinear atmospheric planetary waves is determined by a small number of independent wave clusters consisting of a few connected resonant triads. We classified the different types of connections between neighboring triads that determine the general dynamics of a cluster. Each connection type corresponds to substantially different scenarios of energy flux among the modes. The general approach can be applied directly to various mesoscopic systems with 3-mode interactions, encountered in hydrodynamics, astronomy, plasma physics, chemistry, medicine, etc.

Elena Kartashova; Victor S. L'vov

2008-11-05T23:59:59.000Z

191

Encyclopedia of Atmospheric Sciences, 2002 ROSSBY WAVES  

E-Print Network [OSTI]

WAVES Peter B. Rhines School of Oceanography, University of Washington, Seattle, Washington Large` wave. These waves owe their existence to the rotation and spherical shape of the Earth. Weather reinforce this inequality. Waves then become possible, which are dominated by nearly horizontal wind

Bordoni, Simona

192

Wavelet Spectrum Analysis and Ocean Wind Waves  

E-Print Network [OSTI]

Wavelet Spectrum Analysis and Ocean Wind Waves Paul C. Liu Abstract. Wavelet spectrum analysis is applied to a set of measured ocean wind waves data collected during the 1990 SWADE {Surface Wave Dynamics Experi- ment) program. The results reveal significantly new and previously unexplored Insights on wave

193

SURFACE ALFVEN WAVES IN SOLAR FLUX TUBES  

SciTech Connect (OSTI)

Magnetohydrodynamic (MHD) waves are ubiquitous in the solar atmosphere. Alfven waves and magneto-sonic waves are particular classes of MHD waves. These wave modes are clearly different and have pure properties in uniform plasmas of infinite extent only. Due to plasma non-uniformity, MHD waves have mixed properties and cannot be classified as pure Alfven or magneto-sonic waves. However, vorticity is a quantity unequivocally related to Alfven waves as compression is for magneto-sonic waves. Here, we investigate MHD waves superimposed on a one-dimensional non-uniform straight cylinder with constant magnetic field. For a piecewise constant density profile, we find that the fundamental radial modes of the non-axisymmetric waves have the same properties as surface Alfven waves at a true discontinuity in density. Contrary to the classic Alfven waves in a uniform plasma of infinite extent, vorticity is zero everywhere except at the cylinder boundary. If the discontinuity in density is replaced with a continuous variation of density, vorticity is spread out over the whole interval with non-uniform density. The fundamental radial modes of the non-axisymmetric waves do not need compression to exist unlike the radial overtones. In thin magnetic cylinders, the fundamental radial modes of the non-axisymmetric waves with phase velocities between the internal and the external Alfven velocities can be considered as surface Alfven waves. On the contrary, the radial overtones can be related to fast-like magneto-sonic modes.

Goossens, M.; Andries, J.; Soler, R.; Van Doorsselaere, T. [Centre for Plasma Astrophysics, Department of Mathematics, Katholieke Universiteit Leuven, Celestijnenlaan 200B, 3001 Leuven (Belgium); Arregui, I.; Terradas, J., E-mail: marcel.goossens@wis.kuleuven.be [Solar Physics Group, Departament de Fisica, Universitat de les Illes Balears, E-07122 Palma de Mallorca (Spain)

2012-07-10T23:59:59.000Z

194

Rogue Waves UNIVERSITY OF MIAMI ROSENSTIEL SCHOOL  

E-Print Network [OSTI]

Rogue Waves UNIVERSITY OF MIAMI ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE 4600 Rickenbacker Causeway Miami, Florida 33149 http://www.rsmas.miami.edu Taking the Surprise Out of the Freak Wave another to create monster waves that not even the bravest surfer could love. Big waves are big news

Miami, University of

195

Wave energy devices with compressible volumes  

Science Journals Connector (OSTI)

...author and source are credited. Wave energy devices with compressible volumes Adi...1BJ, UK We present an analysis of wave energy devices with air-filled compressible...wave period range of about-4s. wave energy|compressible volume|axisymmetric device...

2014-01-01T23:59:59.000Z

196

Alden Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Wave Basin Wave Basin Jump to: navigation, search Basic Specifications Facility Name Alden Wave Basin Overseeing Organization Alden Research Laboratory, Inc Hydrodynamic Testing Facility Type Wave Basin Length(m) 33.5 Beam(m) 21.3 Depth(m) 1.2 Water Type Freshwater Cost(per day) Depends on study Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 1.0 Maximum Wave Length(m) 1.8 Wave Period Range(s) 1.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Period adjustable electronically, height adjustable mechanically Wave Direction Both Simulated Beach Yes Description of Beach Designed as needed using commercially available sand/sediment

197

SOLITARY-WAVE AND MULTI-PULSED TRAVELING-WAVE SOLUTIONS OF BOUSSINESQ SYSTEMS  

E-Print Network [OSTI]

SOLITARY-WAVE AND MULTI-PULSED TRAVELING-WAVE SOLUTIONS OF BOUSSINESQ SYSTEMS MIN CHEN Department words: water wave, Boussinesq system, traveling wave, homoclinic orbit, multi-pulsed solution 1. Introduction This paper studies solitary-wave and multi-pulsed solutions of the Boussinesq systems t + ux + (u

Chen, Min

198

Rogue Waves and Explorations of Coastal Wave Characteristics Primary Investigator: Paul C. Liu -NOAA GLERL (Emeritus)  

E-Print Network [OSTI]

Rogue Waves and Explorations of Coastal Wave Characteristics Primary Investigator: Paul C. Liu engineering, University of Wisconsin Overview Freak waves are unusually large waves. They have been observed. As the cause of freak waves is still unknown, measurements and analysis of this phenomena are extremely rare

199

Wave–wave interactions and deep ocean acoustics  

Science Journals Connector (OSTI)

Deep ocean acoustics in the absence of shipping and wildlife is driven by surface processes. Best understood is the signal generated by non-linear surface wave interactions the Longuet-Higgins mechanism which dominates from 0.1 to 10?Hz and may be significant for another octave. For this source the spectral matrix of pressure and vector velocity is derived for points near the bottom of a deep ocean resting on an elastic half-space. In the absence of a bottom the ratios of matrix elements are universal constants. Bottom effects vitiate the usual “standing wave approximation ” but a weaker form of the approximation is shown to hold and this is used for numerical calculations. In the weak standing wave approximation the ratios of matrix elements are independent of the surface wave spectrum but depend on frequency and the propagation environment. Data from the Hawaii-2 Observatory are in excellent accord with the theory for frequencies between 0.1 and 1?Hz less so at higher frequencies. Insensitivity of the spectral ratios to wind and presumably waves is indeed observed in the data.

Z. Guralnik; J. Bourdelais; X. Zabalgogeazcoa; W. E. Farrell

2013-01-01T23:59:59.000Z

200

Energy in a String Wave  

Science Journals Connector (OSTI)

When one end of a taut horizontal elastic string is shaken repeatedly up and down a transverse wave (assume sine waveform) will be produced and travel along it.1 College students know this type of wave motion well. They know when the wave passes by each element of the string will perform an oscillating up?down motion which in mechanics is termed simple harmonic 2. They also know elements of the string at the highest and the lowest positions—the crests and the troughs—are momentarily at rest while those at the centerline (zero displacement) have the greatest speed as shown in Fig. 1. Irrespective of this they are less familiar with the energy associated with the wave. They may fail to answer a question such as “In a traveling string wave which elements have respectively the greatest kinetic energy (KE) and the greatest potential energy (PE)?” The answer to the former is not difficult; elements at zero position have the fastest speed and hence their KE being proportional to the square of speed is the greatest. To the PE what immediately comes to their mind may be the simple harmonic motion (SHM) in which the PE is the greatest and the KE is zero at the two turning points. It may thus lead them to think elements at crests or troughs have the greatest PE. Unfortunately this association is wrong. Thinking that the crests or troughs have the greatest PE is a misconception.3

Chiu?king Ng

2010-01-01T23:59:59.000Z

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201

MHK Technologies/Hybrid wave Wind Wave pumps and turbins | Open Energy  

Open Energy Info (EERE)

Wind Wave pumps and turbins Wind Wave pumps and turbins < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Hybrid wave Wind Wave pumps and turbins.jpg Technology Profile Primary Organization Ocean Wave Wind Energy Ltd OWWE Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description 2Wave1Wind The hybrid wave power rig uses two wave converting technologies in addition to wind mills The main system is a pneumatic float in the category of overtopping as Wave Dragon In addition the pneumatic float can house point absorbers The hybrid wave power rig is based on the patented wave energy converter from 2005

202

Measurement of sound speed vs. depth in South Pole ice: pressure waves and shear waves  

E-Print Network [OSTI]

Price, Attenuation of acoustic waves in glacial ice and saltacoustics, South Pole, sound speed, pressure waves,shear waves PACS: 47.35.De, 47.35.Rs, 62.65. +k, 92.40.Vq,

Klein, Spencer

2010-01-01T23:59:59.000Z

203

Global coherence of dust density waves  

SciTech Connect (OSTI)

The coherence of self-excited three-dimensional dust density waves has been experimentally investigated by comparing global and local wave properties. For that purpose, three-dimensional dust clouds have been confined in a radio frequency plasma with thermophoretic levitation. Global wave properties have been measured from the line-of-sight integrated dust density obtained from homogenous light extinction measurements. Local wave properties have been obtained from thin, two-dimensional illuminated laser slices of the cloud. By correlating the simultaneous global and local wave properties, the spatial coherence of the waves has been determined. We find that linear waves with small amplitudes tend to be fragmented, featuring an incoherent wave field. Strongly non-linear waves with large amplitudes, however, feature a strong spatial coherence throughout the dust cloud, indicating a high level of synchronization.

Killer, Carsten; Melzer, André [Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald (Germany)

2014-06-15T23:59:59.000Z

204

Wave Power: Destroyer of Rocks; Creator of Clean Energy  

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

E E PG&E Wave Energy Wave Energy Federal Utility Partnership Federal Utility Partnership Working Group Meeting Working Group Meeting Wave Energy Wave Energy Development Development Ontario, CA Ontario, CA November 18 November 18- -19, 200 19, 2009 9 Donald G. Price Donald G. Price Senior Consulting Scientist, PG&E Senior Consulting Scientist, PG&E Wave Power Overview Wave Power Overview * * What is Wave Power? What is Wave Power? o o Wave power or wave energy is the energy contained in ocean Wave power or wave energy is the energy contained in ocean o o Wave power or wave energy is the energy contained in ocean Wave power or wave energy is the energy contained in ocean waves that is converted into electricity by various means. waves that is converted into electricity by various means. o o It is a clean, renewable energy resource capable of being utilized

205

Wave | OpenEI Community  

Open Energy Info (EERE)

Wave Wave Home Ocop's picture Submitted by Ocop(5) Member 18 April, 2013 - 13:41 MHK LCOE Reporting Guidance Draft Cost Current DOE LCOE numerical modeling Performance Tidal Wave To normalize competing claims of LCOE, DOE has developed-for its own use-a standardized cost and performance data reporting process to facilitate uniform calculation of LCOE from MHK device developers. This standardization framework is only the first version in what is anticipated to be an iterative process that involves industry and the broader DOE stakeholder community. Multiple files are attached here for review and comment.Upload Files: application/vnd.openxmlformats-officedocument.wordprocessingml.document icon device_performance_validation_data_request.docx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon

206

Gravitational waves from gravitational collapse  

SciTech Connect (OSTI)

Gravitational wave emission from stellar collapse has been studied for nearly four decades. Current state-of-the-art numerical investigations of collapse include those that use progenitors with more realistic angular momentum profiles, properly treat microphysics issues, account for general relativity, and examine non-axisymmetric effects in three dimensions. Such simulations predict that gravitational waves from various phenomena associated with gravitational collapse could be detectable with ground-based and space-based interferometric observatories. This review covers the entire range of stellar collapse sources of gravitational waves: from the accretion induced collapse of a white dwarf through the collapse down to neutron stars or black holes of massive stars to the collapse of supermassive stars.

Fryer, Christopher L [Los Alamos National Laboratory; New, Kimberly C [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

207

Detonation waves in relativistic hydrodynamics  

Science Journals Connector (OSTI)

This paper is concerned with an algebraic study of the equations of detonation waves in relativistic hydrodynamics taking into account the pressure and the energy of thermal radiation. A new approach to shock and detonation wavefronts is outlined. The fluid under consideration is assumed to be perfect (nonviscous and nonconducting) and to obey the following equation of state: p=(?-1)? where p, ?, and ? are the pressure, the total energy density, and the adiabatic index, respectively. The solutions of the equations of detonation waves are reduced to the problem of finding physically acceptable roots of a quadratic polynomial ?(X) where X is the ratio ?/?0 of dynamical volumes behind and ahead of the detonation wave. The existence and the locations of zeros of this polynomial allow it to be shown that if the equation of state of the burnt fluid is known then the variables characterizing the unburnt fluid obey well-defined physical relations.

Mahdy Cissoko

1992-02-15T23:59:59.000Z

208

Reaction force control implementation of a linear generator in irregular waves for a wave power system.  

E-Print Network [OSTI]

??Most designs for wave energy converters include a hydraulic (or pneumatic) interface between the wave device and the generator to smooth electricity production, but a… (more)

Li, Bin

2012-01-01T23:59:59.000Z

209

Nonlocal theory of electromagnetic wave decay into two electromagnetic waves in a rippled density plasma channel  

SciTech Connect (OSTI)

Parametric decay of a large amplitude electromagnetic wave into two electromagnetic modes in a rippled density plasma channel is investigated. The channel is taken to possess step density profile besides a density ripple of axial wave vector. The density ripple accounts for the momentum mismatch between the interacting waves and facilitates nonlinear coupling. For a given pump wave frequency, the requisite ripple wave number varies only a little w.r.t. the frequency of the low frequency decay wave. The radial localization of electromagnetic wave reduces the growth rate of the parametric instability. The growth rate decreases with the frequency of low frequency electromagnetic wave.

Sati, Priti; Tripathi, V. K. [Indian Institute of Technology, Hauz Khas, Delhi 110054 (India)

2012-12-15T23:59:59.000Z

210

Nonlinear dissipation of circularly polarized Alfven waves due to the beam-induced obliquely propagating waves  

SciTech Connect (OSTI)

In the present study, the dissipation processes of circularly polarized Alfven waves in solar wind plasmas including beam components are numerically discussed by using a 2-D hybrid simulation code. Numerical results suggest that the parent Alfven waves are rapidly dissipated due to the presence of the beam-induced obliquely propagating waves, such as kinetic Alfven waves. The nonlinear wave-wave coupling is directly evaluated by using the induction equation for the parent wave. It is also observed both in the 1-D and 2-D simulations that the presence of large amplitude Alfven waves strongly suppresses the beam instabilities.

Nariyuki, Y. [Faculty of Human Development, University of Toyama, 3190, Toyama City, Toyama 930-8555 (Japan); Hada, T. [Department of Earth System Science and Technology, Kyushu University, 6-1, Kasuga City, Fukuoka 816-8580 (Japan); Tsubouchi, K. [Department of Earth and Planetary Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan)

2012-08-15T23:59:59.000Z

211

Optical Wave Propagation Simulation, Wigner Phase-Space Diagrams, and Wave Energy Confinement  

Science Journals Connector (OSTI)

The number of samples required for efficient numerical simulation of wave propagation can be determined by a combination of Wigner phase-space techniques, wave energy confinement...

Rhodes, William T; Sheridan, John T; Hennelley, Bryan M

212

Geodesic deviation and gravitational waves  

E-Print Network [OSTI]

The detection of gravitational waves based on the geodesic deviation equation is discussed. In particular, it is shown that the only non-vanishing components of the wave field in the conventional traceless-transverse gauge in linearized general relativity do not enter the geodesic deviation equation, and therefore, apparently, no effect is predicted by that equation in that specific gauge. The reason is traced back to the fact that the geodesic deviation equation is written in terms of a coordinate distance, which is not a directly measurable quantity. On the other hand, in the proper Lorentz frame of the detector, the conventional result described in standard textbooks holds.

M. Leclerc

2006-05-24T23:59:59.000Z

213

Undulations from amplified low frequency surface waves  

SciTech Connect (OSTI)

We study the linear scattering of gravity waves in longitudinal inhomogeneous stationary flows. When the flow becomes supercritical, it is known that counterflow propagating shallow waves are blocked and converted into deep waves. Here we show that in the zero-frequency limit, the reflected waves are amplified in such a way that the free surface develops an undulation, i.e., a zero-frequency wave of large amplitude with nodes located at specific places. This amplification involves negative energy waves and implies that flat surfaces are unstable against incoming perturbations of arbitrary small amplitude. The relation between this instability and black hole radiation (the Hawking effect) is established.

Coutant, Antonin, E-mail: antonin.coutant@aei.mpg.de [Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Muhlenberg 1, 14476 Golm (Germany)] [Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Muhlenberg 1, 14476 Golm (Germany); Parentani, Renaud, E-mail: renaud.parentani@th.u-psud.fr [Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay Cedex (France)] [Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay Cedex (France)

2014-04-15T23:59:59.000Z

214

Advanced, High Power, Next Scale, Wave Energy Conversion Device...  

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

Advanced, High Power, Next Scale, Wave Energy Conversion Device Advanced, High Power, Next Scale, Wave Energy Conversion Device Advanced, High Power, Next Scale, Wave Energy...

215

Atargis Energy (TRL 4 System) - Cycloidal Wave Energy Converter...  

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

Atargis Energy (TRL 4 System) - Cycloidal Wave Energy Converter Atargis Energy (TRL 4 System) - Cycloidal Wave Energy Converter Atargis Energy (TRL 4 System) - Cycloidal Wave...

216

Identifying two steps in the internal wave energy cascade  

E-Print Network [OSTI]

1.1.1 The internal wave energy cascade . . . . . . .? ? , which contain only wave energy trav- eling upward anddistinction is made between wave energy propagating upward

Sun, Oliver Ming-Teh

2010-01-01T23:59:59.000Z

217

MHK Technologies/New Knowledge Wind and Wave Renewable Mobile...  

Open Energy Info (EERE)

Wave Renewable Mobile Wind and Wave Power Plant Platform < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage New Knowledge Wind and Wave Renewable...

218

Langmuir Waves and Electron Acceleration at Heliospheric Shocks  

E-Print Network [OSTI]

Results for S/WAVES . . . . . . . . . . . . . A.7 Rheometry2.4 MHD Wave Modes . . . . . . . . . . . . . . . . . . . .Electron Acceleration, Plasma Waves, and Radio Emission 3.1

Pulupa, Marc Peter

2010-01-01T23:59:59.000Z

219

Airborne observations of the kinematics and statistics of breaking waves  

E-Print Network [OSTI]

v 3 Observations of wave breaking kinematics in fetch-crest length . . . . . C.6 Wave elevation . . . . . . . .breaking waves in the images . . . . . . . . . . . 3.3.3

Kleiss, Jessica M.

2009-01-01T23:59:59.000Z

220

A Numerical Method for Reconstructing the Coefficient in a Wave Equation  

E-Print Network [OSTI]

with variable density and constant bulk modulus [5, 14, 15]. It may also be viewed as a simplified model of Hong Kong, Shatin, N.T., Hong Kong. (zou@math.cuhk.edu.hk). 1 #12;years, some rapid identification/fault identification techniques are developed for cracks having free boundary condition using a reciprocity gap

Zou, Jun

Note: This page contains sample records for the topic "wave buoy hk" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


221

Property:Maximum Wave Height(m) at Wave Period(s) | Open Energy Information  

Open Energy Info (EERE)

Wave Height(m) at Wave Period(s) Wave Height(m) at Wave Period(s) Jump to: navigation, search Property Name Maximum Wave Height(m) at Wave Period(s) Property Type String Pages using the property "Maximum Wave Height(m) at Wave Period(s)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 10.0 + 10-ft Wave Flume Facility + 10.0 + 11-ft Wave Flume Facility + 10.0 + 2 2-ft Flume Facility + 10.0 + 3 3-ft Wave Flume Facility + 10.0 + 5 5-ft Wave Flume Facility + 10.0 + 6 6-ft Wave Flume Facility + 10.0 + A Alden Large Flume + 0.0 + Alden Wave Basin + 1.0 + C Chase Tow Tank + 3.1 + Coastal Harbors Modeling Facility + 2.3 + Coastal Inlet Model Facility + 2.3 + D Davidson Laboratory Tow Tank + 4.0 + DeFrees Large Wave Basin + 3.0 + DeFrees Small Wave Basin + 3.0 +

222

Vortex Hydro Energy (TRL 5 6 System) - Advanced Integration of...  

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

- PB500, 500 kW Utility-Scale PowerBuoy Project WaveBob (TRL 5 6 System) - Advanced Wave Energy Conversion Project Water Power Program About the Program Research &...

223

Tabular icebergs in ocean waves  

Science Journals Connector (OSTI)

... in ocean waves. Two field seasons have been carried out by SPRI in cooperation with Norsk Polarinstitutt, and Foldvik et a/.11 have reported some measurements which took place during ... officers and the crew of the ship for their patience and help. We thank the Norsk Polarinstitutt (NP) and the Radio Echo Group at SPRI for loan of equipment, ...

Monica Kristensen; Vernon A. Squire; Stuart C. Moore

1982-06-24T23:59:59.000Z

224

Dispersion of discontinuous periodic waves  

Science Journals Connector (OSTI)

...Benjamin-Bona-Mahony (BBM) model's is asymptotically...standard bidirectional Boussinesq systems is asymptotically...waves |k|1/2k Boussinesq system, regularized Boussinesq equation signk Boussinesq...Korteweg-de Vries k 3 RLW/BBM k 1 Figure 2. RLW...

2013-01-01T23:59:59.000Z

225

Spiral Waves of Chemical Activity  

Science Journals Connector (OSTI)

...is tethered by an unwinding string (Fig. 1B). At p > l...minute. In its spontaneously oscillating form and its merely excitable...mentions spiral waves in the oscillating reagent on page 29 of "Investiga-tion...homogeneous chemical auto-oscillating systems" (in Russian...

Arthur T. Winfree

1972-02-11T23:59:59.000Z

226

On the use of computational models for wave climate assessment in support of the wave energy industry.  

E-Print Network [OSTI]

??Effective, economic extraction of ocean wave energy requires an intimate under- standing of the ocean wave environment. Unfortunately, wave data is typically un- available in… (more)

Hiles, Clayton E.

2011-01-01T23:59:59.000Z

227

Wave Star Energy | Open Energy Information  

Open Energy Info (EERE)

Star Energy Star Energy Jump to: navigation, search Name Wave Star Energy Place Denmark Zip DK-2920 Product Denmark-based private wave device developer. References Wave Star Energy[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: Wave Star Energy 1 10 Scale Model Test This company is involved in the following MHK Technologies: C5 WaveStar This article is a stub. You can help OpenEI by expanding it. Wave Star Energy is a company located in Denmark . References ↑ "Wave Star Energy" Retrieved from "http://en.openei.org/w/index.php?title=Wave_Star_Energy&oldid=678928" Categories: Clean Energy Organizations

228

First Plasma Wave Observations at Uranus  

Science Journals Connector (OSTI)

...electrons. Various other plasma waves were also observed...plane crossing, the plasma wave instrument detected a large number of impulsive...BRIDGE, H.S., PLASMA OBSERVATIONS NEAR URANUS...FROM URANUS AT 0.5 MHZ, ASTROPHYSICAL JOURNAL...

D. A. GURNETT; W. S. KURTH; F. L. SCARF; R. L. POYNTER

1986-07-04T23:59:59.000Z

229

Sandia National Laboratories: Wave Energy Resource Characterization...  

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

Impacts of Ivanpah Solar Power Site Sandia Funded to Model Power Pods for Utility-Scale Wave-Energy Converter Wave Energy Resource Characterization at US Test Sites On September...

230

Wave Patterns and Southern Hemisphere Convergence Zones  

E-Print Network [OSTI]

-rate days, a wave pattern is identified that is characteristic of high rain events. This wave pattern is then compared to the patterns of variability of brightness temperature using empirical orthogonal functions. A linear regression technique is used...

Ramotowski, Michelle R.

2013-04-11T23:59:59.000Z

231

Wave Energy Centre | Open Energy Information  

Open Energy Info (EERE)

Centre Jump to: navigation, search Name: Wave Energy Centre Address: Wave Energy Centre Av Manuela da Maia 36 R C Dto Place: Lisboa Zip: 1000-201 Region: Portugal Sector: Marine...

232

Rene Wave Ltd | Open Energy Information  

Open Energy Info (EERE)

Rene Wave Ltd Jump to: navigation, search Name: Rene Wave Ltd Address: 85 Emmett Ave Suite 2508 Place: Toronto Zip: M6M 5A2 Region: Canada Sector: Marine and Hydrokinetic Phone...

233

Arnold Schwarzenegger DEVELOPING WAVE ENERGY IN  

E-Print Network [OSTI]

Arnold Schwarzenegger Governor DEVELOPING WAVE ENERGY IN COASTAL CALIFORNIA: POTENTIAL SOCIO. Developing Wave Energy In Coastal California: Potential Socio-Economic And Environmental Effects. California-ECONOMIC AND ENVIRONMENTAL EFFECTS Prepared For: California Energy Commission Public Interest Energy Research Program

234

On quantization of nondispersive wave packets  

SciTech Connect (OSTI)

Nondispersive wave packets are widely used in optics and acoustics. We found it interesting that such packets could be also a subject of quantum field theory. Canonical commutation relations for the nondispersive wave packets are constructed.

Altaisky, M. V. [Space Research Institute RAS, Profsoyuznaya 84/32, Moscow 117997 (Russian Federation)] [Space Research Institute RAS, Profsoyuznaya 84/32, Moscow 117997 (Russian Federation); Kaputkina, N. E. [National University of Science and Technology “MISIS” Leninsky prospect 4, Moscow 119049 (Russian Federation)] [National University of Science and Technology “MISIS” Leninsky prospect 4, Moscow 119049 (Russian Federation)

2013-10-15T23:59:59.000Z

235

Motor Wave Group | Open Energy Information  

Open Energy Info (EERE)

MHK Technologies: MotorWave This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleMotorWaveGroup&oldid769272...

236

Strings in plane-fronted gravitational waves  

E-Print Network [OSTI]

Brinkmann's plane-fronted gravitational waves with parallel rays --~shortly pp-waves~-- are shown to provide, under suitable conditions, exact string vacua at all orders of the sigma-model perturbation expansion.

C. Duval; Z. Horvath; P. A. Horvathy

2006-02-13T23:59:59.000Z

237

Symmetries and Interaction coefficients of Kelvin waves  

E-Print Network [OSTI]

We considered symmetry restriction on the interaction coefficients of Kelvin waves and demonstrated that linear in small wave vector asymptotic is not forbidden, as one can expect by naive reasoning.

Vladimir V. Lebedev; Victor S. L'vov

2010-05-25T23:59:59.000Z

238

Nonlinear Saturation of Vertically Propagating Rossby Waves  

E-Print Network [OSTI]

The interaction between vertical Rossby wave propagation and wave breaking is studied in the idealized context of a beta-plane channel model. Considering the problem of propagation through a uniform zonal flow in an ...

Giannitsis, Constantine

239

Fracture compliance estimation using borehole tube waves  

E-Print Network [OSTI]

We tested two models, one for tube-wave generation and the other for tube-wave attenuation at a fracture intersecting a borehole that can be used to estimate fracture compliance, fracture aperture, and lateral extent. In ...

Bakku, Sudhish Kumar

240

On Rayleigh Waves Across the Pacific Ocean  

Science Journals Connector (OSTI)

......research-article Articles On Rayleigh Waves Across the Pacific Ocean K. E. Bullen University College, Auckland, N. Z. ON RAYLEIGH WAVES ACROSS THE PACIFIC OCEAN K. E. Bullen (Received 1939November 9) The Bering......

K. E. Bullen

1939-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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241

Wave Breaking Dissipation Observed with “SWIFT” Drifters  

Science Journals Connector (OSTI)

Energy dissipation rates during ocean wave breaking are estimated from high-resolution profiles of turbulent velocities collected within 1 m of the surface. The velocity profiles are obtained from a pulse-coherent acoustic Doppler sonar on a wave-...

Jim Thomson

2012-12-01T23:59:59.000Z

242

Green Ocean Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Ocean Wave Air Piston This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleGreenOceanWaveEnergy&oldid769161...

243

Equatorial Solitary Waves. Part 2: Envelope Solitons  

Science Journals Connector (OSTI)

Via the method of multiple scales, it is shown that the time and space evolution of the envelope of wave packets of weakly nonlinear, strongly dispersive equatorial waves is governed by the Nonlinear Schrödinger equation. The diverse phenomena of ...

John P. Boyd

1983-03-01T23:59:59.000Z

244

Periodic wave solutions of the Boussinesq equation  

Science Journals Connector (OSTI)

The Boussinesq equation usually arises in a physical problem as a long wave equation. The present work extends the search of periodic wave solutions for it. The Hirota bilinear method and Riemann theta function are employed in the process. We also analyse the asymptotic property of periodic waves in detail. Furthermore, it is of interest to note that well-known soliton solutions can be reduced from the periodic wave solutions.

Yi Zhang; Ling-ya Ye; Yi-neng Lv; Hai-qiong Zhao

2007-01-01T23:59:59.000Z

245

Numerical study on active wave devouring propulsion  

Science Journals Connector (OSTI)

The possibility of extracting energy from gravity waves for marine propulsion was numerically studied by a two-dimensional...

Liyanarachchi Waruna Arampath De Silva…

2012-09-01T23:59:59.000Z

246

Electromagnetic wave scattering by Schwarzschild black holes  

E-Print Network [OSTI]

We analyze the scattering of a planar monochromatic electromagnetic wave incident upon a Schwarzschild black hole. We obtain accurate numerical results from the partial wave method for the electromagnetic scattering cross section, and show that they are in excellent agreement with analytical approximations. The scattering of electromagnetic waves is compared with the scattering of scalar, spinor and gravitational waves. We present a unified picture of the scattering of all massless fields for the first time.

Luís C. B. Crispino; Sam R. Dolan; Ednilton S. Oliveira

2009-05-20T23:59:59.000Z

247

Nonlinear Mixing of Electromagnetic Waves in Plasmas  

Science Journals Connector (OSTI)

...coupling (32, 33). Plasma instabilities with multiple...experiment (34) with 430-MHz incoher-ent backscatter...probing of ionospheric plasma with beat waves appears...four-wave mixing in a plasma opens up the possibility...important in future upper atmospheric research. Beat waves...

V. STEFAN; B. I. COHEN; C. JOSHI

1989-01-27T23:59:59.000Z

248

Airbreathing Rotating Detonation Wave Engine Cycle Analysis  

E-Print Network [OSTI]

Airbreathing Rotating Detonation Wave Engine Cycle Analysis Eric M. Braun, Frank K. Lu, Donald R analysis of an airbreathing, rotating detonation wave engine (RDWE) is developed. The engine consists of a steady inlet system with an isolator which delivers air into the detonation annulus. A single wave

Texas at Arlington, University of

249

Slow magnetohydrodynamic waves in the solar atmosphere  

Science Journals Connector (OSTI)

...waves and oscillations in the solar plasma organized by Robert Erdelyi...waves at a magnetic interface. Solar Phys. 69, 1981a 27-38...Cram1981bpp. 369-383. Eds. New Mexico:Sunspot, Sacramento Peak...Magnetohydrodynamic waves. In Solar system magnetic fields E.R...

2006-01-01T23:59:59.000Z

250

Seminario de Matemtica Aplicada "Renowable wave energy  

E-Print Network [OSTI]

Seminario de Matemática Aplicada "Renowable wave energy: potencial and technical challenges Abstract: Among the various renewable energy sources, ocean wave energy has been only recently investiga will be at first to introduce the potential of wave energy, as a significant, and often neglected, contributor

Tradacete, Pedro

251

Discrete control of resonant wave energy devices  

Science Journals Connector (OSTI)

...Society 28 January 2012 research-article Articles 1006...peaks and troughs of wave energy: the dreams and the...control of deep water wave energy devices using an active...www.iwwwfb.org/Abstracts/iwwwfb20/iwwwfb20...latching control of a wave energy device in regular and...

2012-01-01T23:59:59.000Z

252

An Introduction to Wave-Current Interactions  

E-Print Network [OSTI]

-scale wave focusing across a storm can re-direct the wind-stress? #12;1. Adiabatic interaction StartAn Introduction to Wave-Current Interactions Jerry Smith, MPL-SIO-UCSD jasmith@ucsd.edu http just want to hold up your hand. #12;Some Questions in Wave-Current Interaction Physics 1. Adiabatic

Smith, Jerome A.

253

Hydrodynamic principles of wave power extraction  

Science Journals Connector (OSTI)

...Based on statistical data, Thorpe [12] has estimated the wave power potential along various...and K. Budal1982Wave-power absorption by parallel...de2008Phase control through load control of oscillating-body...and C. C. Mei2009Wave power extraction by a compact...

2012-01-01T23:59:59.000Z

254

CURRENTS DRIVEN BY ELECTRON CYCLOTRON WAVES  

E-Print Network [OSTI]

CURRENTS DRIVEN BY ELECTRON CYCLOTRON WAVES C.F.F. KARNEY, NJ. FISCH Plasma Physics Laboratory of the generation of steady-state currents by electron cyclotron waves are explored. A numerical solution of electron cyclotron wave absorption appears to be one of the more promising schemes of providing a steady

Karney, Charles

255

SCATTERING BEHAVIOR OF TRANSITIONAL SHOCK WAVES  

E-Print Network [OSTI]

SCATTERING BEHAVIOR OF TRANSITIONAL SHOCK WAVES Kevin R. Zumbrun Bradley J. Plohr Dan Marchesin September, 1991 Abstract. We study the stability and asymptotic behavior of transitional shock waves as solutions of a parabolic system of conservation laws. In contrast to classical shock waves, transitional

New York at Stoney Brook, State University of

256

Waves on unsteady currents Merrick C. Haller  

E-Print Network [OSTI]

Waves on unsteady currents Merrick C. Haller School of Civil and Construction Engineering, Oregon 2007; published online 3 December 2007 Models for surface gravity wave propagation in the presence of currents often assume the current field to be quasi-stationary, which implies that the absolute wave

Haller, Merrick

257

Bifurcation Theory of Meandering Spiral Waves  

E-Print Network [OSTI]

Bifurcation Theory of Meandering Spiral Waves Claudia Wul Freie Universitat Berlin, Fachbereich Mathematik und Informatik, Arnimallee 2{6, 14195 Berlin, email: wul @math.fu-berlin.de Abstract. Spiral waves-Zhabotinsky reaction. We develop a mathematical theory for the Hopf bifurcation from rigidly rotating spiral waves

Wulff, Claudia

258

Energy and Energy Flux in Planetary Waves  

Science Journals Connector (OSTI)

...research-article Energy and Energy Flux in Planetary Waves V. T. Buchwald The propagation...a thorough study of the energy of these waves in the plane approximation...case of divergent planetary waves, the total energy density being E = T + U...

1972-01-01T23:59:59.000Z

259

A Positive-Energy Relativistic Wave Equation  

Science Journals Connector (OSTI)

...research-article A Positive-Energy Relativistic Wave Equation P. A. M...positive and negative energies. A new relativistic wave equation for particles...positive values for the energy. There is great formal...usual relativistic wave equation for the electron...

1971-01-01T23:59:59.000Z

260

Some Common Wave Phenomena Applied to an M.H.D. Anisotropic Surface Wave System  

Science Journals Connector (OSTI)

......10xf. 4. The Kelvin Ship Wave Problem The effect of a local disturbance...anisotropy relative to its effect on the ship wave pattern. It is...demonstrate clearly the effect of the anisotropy of...surface waves in the ship wave problem. However......

I. S. ROBINSON

1976-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Wave Turbulence in Superfluid 4 Energy Cascades, Rogue Waves & Kinetic Phenomena  

E-Print Network [OSTI]

Outline Wave Turbulence in Superfluid 4 He: Energy Cascades, Rogue Waves & Kinetic Phenomena Conference, Chernogolovka, 3 August 2009 McClintock Efimov Ganshin Kolmakov Mezhov-Deglin Wave Turbulence in Superfluid 4 He #12;Outline Outline 1 Introduction Motivation 2 Modelling wave turbulence Need for models

Fominov, Yakov

262

Beauty waves: an artistic representation of ocean waves using Bezier curves  

E-Print Network [OSTI]

In this thesis, we present a method for computing an artistic representation of ocean waves using Bezier curves. Wave forms are loosely based on procedural wave models and are designed to emulate those found in both art and nature. The wave forms...

Faulkner, Jay Allen

2007-04-25T23:59:59.000Z

263

Lossless Tapers, Gaussian Beams, Free-Space Modes: Standing Waves Versus Through-Flowing Waves  

E-Print Network [OSTI]

Lossless Tapers, Gaussian Beams, Free-Space Modes: Standing Waves Versus Through-Flowing Waves inconsistencies, in Marcatili's lossless tapers through-flowing waves must be drastically different from standing waves. First, we reconfirm this by means of numerical results based on an extended BPM algorithm. Next

Curtarolo, Stefano

264

Segmented Waves from a Spatiotemporal Transverse Wave Instability Lingfa Yang, Igal Berenstein, and Irving R. Epstein*  

E-Print Network [OSTI]

Segmented Waves from a Spatiotemporal Transverse Wave Instability Lingfa Yang, Igal Berenstein observe traveling waves emitted from Turing spots in the chlorine dioxide-iodine-malonic acid reaction. The newborn waves are continuous, but they break into segments as they propagate, and the propagation

Epstein, Irving R.

265

THE EFFECTS OF WAVE ESCAPE ON FAST MAGNETOSONIC WAVE TURBULENCE IN SOLAR FLARES  

SciTech Connect (OSTI)

One of the leading models for electron acceleration in solar flares is stochastic acceleration by weakly turbulent fast magnetosonic waves ({sup f}ast waves{sup )}. In this model, large-scale flows triggered by magnetic reconnection excite large-wavelength fast waves, and fast-wave energy then cascades from large wavelengths to small wavelengths. Electron acceleration by large-wavelength fast waves is weak, and so the model relies on the small-wavelength waves produced by the turbulent cascade. In order for the model to work, the energy cascade time for large-wavelength fast waves must be shorter than the time required for the waves to propagate out of the solar-flare acceleration region. To investigate the effects of wave escape, we solve the wave kinetic equation for fast waves in weak turbulence theory, supplemented with a homogeneous wave-loss term. We find that the amplitude of large-wavelength fast waves must exceed a minimum threshold in order for a significant fraction of the wave energy to cascade to small wavelengths before the waves leave the acceleration region. We evaluate this threshold as a function of the dominant wavelength of the fast waves that are initially excited by reconnection outflows.

Pongkitiwanichakul, Peera; Chandran, Benjamin D. G. [Space Science Center and Department of Physics, University of New Hampshire, Durham, NH 03824 (United States); Karpen, Judith T. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); DeVore, C. Richard, E-mail: pbu3@unh.edu, E-mail: benjamin.chandran@unh.edu, E-mail: judy.karpen@nasa.gov, E-mail: devore@nrl.navy.mil [Naval Research Laboratory, Washington, DC 20375 (United States)

2012-09-20T23:59:59.000Z

266

Category:Long-Wave Infrared | Open Energy Information  

Open Energy Info (EERE)

Long-Wave Infrared page? For detailed information on Long-Wave Infrared as exploration techniques, click here. Category:Long-Wave Infrared Add.png Add a new Long-Wave Infrared...

267

Traveling wave device for combining or splitting symmetric and asymmetric waves  

DOE Patents [OSTI]

A traveling wave device for the combining or splitting of symmetric and asymmetric traveling wave energy includes a feed waveguide for traveling wave energy, the feed waveguide having an input port and a launching port, a reflector for coupling wave energy between the feed waveguide and a final waveguide for the collection and transport of wave energy to or from the reflector. The power combiner has a launching port for symmetrical waves which includes a cylindrical section coaxial to the feed waveguide, and a launching port for asymmetric waves which includes a sawtooth rotated about a central axis.

Möbius, Arnold (Eggenstein, DE); Ives, Robert Lawrence (Saratoga, CA)

2005-07-19T23:59:59.000Z

268

von Neumann-Landau equation for wave functions, wave-particle duality and collapses of wave functions  

E-Print Network [OSTI]

It is shown that von Neumann-Landau equation for wave functions can present a mathematical formalism of motion of quantum mechanics. The wave functions of von Neumann-Landau equation for a single particle are `bipartite', in which the associated Schr\\"{o}dinger's wave functions correspond to those `bipartite' wave functions of product forms. This formalism establishes a mathematical expression of wave-particle duality and that von Neumann's entropy is a quantitative measure of complementarity between wave-like and particle-like behaviors. Furthermore, this extension of Schr\\"{o}dinger's form suggests that collapses of Schr\\"{o}dinger's wave functions can be regarded as the simultaneous transition of the particle from many levels to one.

Zeqian Chen

2007-03-22T23:59:59.000Z

269

Ponderomotive Forces On Waves In Modulated Media  

SciTech Connect (OSTI)

Nonlinear interactions of waves via instantaneous cross-phase modulation can be cast in the same way as ponderomotive wave-particle interactions in high-frequency electromagnetic fi eld. The ponderomotive effect arises when rays of a probe wave scatter off perturbations of the underlying medium produced by a second, modulation wave, much like charged particles scatter off a quasiperiodic field. Parallels with the point-particle dynamics, which itself is generalized by this theory, lead to new methods of wave manipulation, including asymmetric barriers for light.

Dodin, I.Y; Fisch, Nathaniel

2014-02-28T23:59:59.000Z

270

Standing waves in the Universe  

E-Print Network [OSTI]

At first, a review of our knowledge on the distribution of galaxies at large-scale, leading to a foam-like large-scale structure of the Universe, is presented in the Introduction. Then, it is shown how, according to the present theory for the formation of superclusters, wave scalar perturbations of the same frequency traveling in opposite directions give rise to standing waves, which cause a motion of the cosmic material towards the nodes, resulting in the concentration of the cosmic material around the nodes. Generalizing this effect to two (three) dimensions, the cosmic material is concentrated around the node lines (node surfaces). It is proposed that the three-dimensional effect is responsible for the foam-like large-scale structure of the Universe.

Evangelos Chaliasos

2005-12-06T23:59:59.000Z

271

Millimeter-wave active probe  

DOE Patents [OSTI]

A millimeter-wave active probe for use in injecting signals with frequencies above 50GHz to millimeter-wave and ultrafast devices and integrated circuits including a substrate upon which a frequency multiplier consisting of filter sections and impedance matching sections are fabricated in uniplanar transmission line format. A coaxial input and uniplanar 50 ohm transmission line couple an approximately 20 GHz input signal to a low pass filter which rolls off at approximately 25 GHz. An input impedance matching section couples the energy from the low pass filter to a pair of matched, antiparallel beam lead diodes. These diodes generate odd-numberd harmonics which are coupled out of the diodes by an output impedance matching network and bandpass filter which suppresses the fundamental and third harmonics and selects the fifth harmonic for presentation at an output.

Majidi-Ahy, Gholamreza (Sunnyvale, CA); Bloom, David M. (Portola Valley, CA)

1991-01-01T23:59:59.000Z

272

Progress towards Gravitational Wave Astronomy  

E-Print Network [OSTI]

I will review the most recent and interesting results from gravitational wave detection experiments, concentrating on recent results from the LIGO Scientific Collaboration (LSC). I will outline the methodologies utilized in the searches, explain what can be said in the case of a null result, what quantities may be constrained. I will compare these results with prior expectations and discuss their significance. As I go along I will outline the prospects for future improvements.

M. Alessandra Papa

2008-02-07T23:59:59.000Z

273

Rabi Waves in Carbon Nanotubes  

E-Print Network [OSTI]

QED-model for the multichain qubit system with interactions of qubits and chains between themselves on the example of the system of $\\sigma$-polarons in carbon zigzag nanotubes, interacting with quantized EM-field, is considered analytically. The possibility of experimental detection of Rabi waves in conventional stationary optical experiments for any quasi-1D system with strong electron-photon interaction is predicted.

Alla Dovlatova; Dmitry Yearchuck

2010-09-08T23:59:59.000Z

274

The Wave of the Future  

E-Print Network [OSTI]

The Wave of the Future Story by Courtney Swyden THEWAVE OF THE FUTURE tx H2O | pg. 2 Plans use local involvement to enhance water quality Comprehensive watershed protection plans,outlining ways to preserve or restore water-sheds, are becoming a... popular approach for protecting Texas surface waters. The Texas Water Resources Institute (TWRI), Texas Agricultural Experiment Station and Texas Cooperative Extension are taking an active role in providing assessment, educational outreach, manage...

Swyden, Courtney

2006-01-01T23:59:59.000Z

275

Sequentially pulsed traveling wave accelerator  

DOE Patents [OSTI]

A sequentially pulsed traveling wave compact accelerator having two or more pulse forming lines each with a switch for producing a short acceleration pulse along a short length of a beam tube, and a trigger mechanism for sequentially triggering the switches so that a traveling axial electric field is produced along the beam tube in synchronism with an axially traversing pulsed beam of charged particles to serially impart energy to the particle beam.

Caporaso, George J. (Livermore, CA); Nelson, Scott D. (Patterson, CA); Poole, Brian R. (Tracy, CA)

2009-08-18T23:59:59.000Z

276

OTRC Wave Basin | Open Energy Information  

Open Energy Info (EERE)

OTRC Wave Basin OTRC Wave Basin Jump to: navigation, search Basic Specifications Facility Name OTRC Wave Basin Overseeing Organization Texas A&M (OTRC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 45.7 Beam(m) 30.5 Depth(m) 5.8 Water Type Freshwater Cost(per day) $300/hour (excluding labor) Special Physical Features 4.6m wide x 9.1m long x 16.8m deep pit with adjustable depth floor in test area Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 0.6 Length of Effective Tow(m) 27.4 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.9 Maximum Wave Height(m) at Wave Period(s) 4.0 Maximum Wave Length(m) 25 Wave Period Range(s) 4.0 Current Velocity Range(m/s) 0.6 Programmable Wavemaking Yes Wavemaking Description GEDAP 3D wave generation software, 48 hinged flap wave generator

277

1 P A P E R 2 Design, Modeling and Optimization of an  

E-Print Network [OSTI]

system comprising a buoy that houses a set of mechanical 48 devices and a permanent magnetic generator results are 57 provided and compared. 58 Keywords: buoy, ocean wave energy, permanent magnetic generator a shaft to 51 move armature coils within the generator to produce an electric current. The amount 52

Qu, Zhihua

278

ON THE EXECUTION OF MARINE RESEARCH IN THE BERING STRAIT, EAST SIBERIAN AND THE CHUKCHI SEA BY THE  

E-Print Network [OSTI]

Strait; - determination of the influence of wind-wave mixing upon the structure of waters; - monitoring: - recovery of the three autonomous buoy-based stations, deployed during the year of 2008 within the territorial waters of the Russian Federation and five autonomous buoy-based stations within the territorial

279

On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy Industry  

E-Print Network [OSTI]

On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy Industry Effective, economic extraction of ocean wave energy requires an intimate under- standing of the ocean wave

Victoria, University of

280

Coastal Wave Generation and Wave Breaking over Terrain: Two Problems in Mesoscale Wave Dynamics  

E-Print Network [OSTI]

with open circles). The resolved-scale eddy term is shown by stars (no line), with the background viscous part then being the di erence between the net resolved-scale and resolved-scale eddy parts. : : : : : : : : : : : 36 16 Schematic sea breeze system... breeze and mesoscale convective systems. Gravity wave momentum transport away from topography in particular plays an important role in the momentum budget of the atmosphere and hence the general circulation. The present study addresses two aspects...

Qian, Tingting

2010-07-14T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

FDI Waves, Waves of Neglect of Political Risk  

Science Journals Connector (OSTI)

Summary Studies of the impact of local political risk on foreign direct investment inflows overlook that worldwide FDI comes in waves. Using a simple model we show that the impact of political risk on FDI inflows is likely to be weaker, the larger the worldwide amount of FDI, which may question standard estimates and their policy implications. Using a large sample of developing and developed economies, we estimate the sensitivity of the distribution of FDI inflows across countries, to the local political risk. We find that it is a decreasing function of the worldwide amount of FDI. This finding has been upheld after many robustness checks.

Pierre-Guillaume Méon; Khalid Sekkat

2012-01-01T23:59:59.000Z

282

Waves  

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

Acerca de las ondas Acerca de las ondas Volver Principal ESTOY PERDIDO!!! Hablando en términos simples, una onda es algo que oscila en el tiempo y en el espacio. Las ondas se extienden de un lugar a otro. Pueden vibrar periódicamente (como el sonido de la nota de un violín) o de modo no periódico (como en el sonido de una explosión, por ejemplo.) Todas las ondas tienen las siguientes propiedades: El tamaño de la vibración se llama su amplitud. Cuán seguido ocurre la vibración es la frecuencia. La distancia que la onda ha recorrido entre dos máximos es la longitud de onda. Puesto que una onda dada se propaga a una determinada velocidad, a través de un material, si Usted incrementa la frecuencia de la onda, la distancia entre crestas disminuirá (es decir se produce una disminución

283

Wave  

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

Great Plains states. The temperatures soared to record- setting levels. The state of Oklahoma saw its fourth hottest July since 1895, while Kansas experienced its seventh warmest....

284

Waves  

Science Journals Connector (OSTI)

The fractal behavior of accidents like the Fukushima dai-ichi disaster gives scientists a tool ... by the projection of nuclear power incidents going forward, in Fig. 1.4c. The likelihood of a reportable incident...

Ted G. Lewis

2014-01-01T23:59:59.000Z

285

On the application of circular–cylindrical waves to ocean wave power absorption  

Science Journals Connector (OSTI)

This study derives mathematical forms for the waves radiated from a heaving, surging and swaying point source on the surface of a three dimensional ocean. The interactions between a monochromatic plane wave and monochromatic circular–cylindrical radiated waves are examined, and solutions to the time averaged power are calculated. These calculations confirm pre-existing theoretical maximum absorption lengths for both a heaving and surging point source. The derivations also lead to the definition of the amplitude, phase and form of the radiated waves required to achieve these maximums. Two experimental case studies match measured radiated wave with circular waves. These matches demonstrate a correlation between the body motions and the dominant form of radiated waves as well as higher frequency waves. The study develops three general guidelines for the design of efficient point absorber wave energy converters (PAWECs). Optimum power absorption occurs when the PAWEC radiates theoretical heave and surge waves of the appropriate amplitude and phase. Theoretical sway type waves should be minimized as these radiate energy and do not interact with the incident wave. Similarly, the radiation of higher harmonic waves should also be minimized for the same reasons.

Matthew Wypych; Lan Le-Ngoc; Keith Alexander; Alister Gardner

2012-01-01T23:59:59.000Z

286

Wave maps on a wormhole  

E-Print Network [OSTI]

We consider equivariant wave maps from a wormhole spacetime into the three-sphere. This toy-model is designed for gaining insight into the dissipation-by-dispersion phenomena, in particular the soliton resolution conjecture. We first prove that for each topological degree of the map there exists a unique static solution (harmonic map) which is linearly stable. Then, using the hyperboloidal formulation of the initial value problem, we give numerical evidence that every solution starting from smooth initial data of any topological degree evolves asymptotically to the harmonic map of the same degree. The late-time asymptotics of this relaxation process is described in detail.

Piotr Bizo?; Micha? Kahl

2014-12-17T23:59:59.000Z

287

SeWave | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » SeWave Jump to: navigation, search Name SeWave Place Denmark Zip FO-110 Product Denmark-based 50:50 JV between UK's Wavegen and Faroese electricity company SEV to to design and build a tunnelled demonstration wave power plant in the Faroes Islands. References SeWave[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This article is a stub. You can help OpenEI by expanding it. SeWave is a company located in Denmark . References ↑ "SeWave"

288

Carnegie Wave Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Carnegie Wave Energy Limited Carnegie Wave Energy Limited Jump to: navigation, search Name Carnegie Wave Energy Limited Address 1 124 Stirling Highway Place North Fremantle Zip 6159 Sector Marine and Hydrokinetic Year founded 1993 Number of employees 25 Website http://www.carnegiewave.com Region Australia LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: CETO La Reunion CETO3 Garden Island Perth Wave Energy Project PWEP This company is involved in the following MHK Technologies: CETO Wave Energy Technology This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=Carnegie_Wave_Energy_Limited&oldid=678263

289

Property:Wave Direction | Open Energy Information  

Open Energy Info (EERE)

Direction Direction Jump to: navigation, search Property Name Wave Direction Property Type String Pages using the property "Wave Direction" Showing 25 pages using this property. (previous 25) (next 25) A Alden Small Flume + Uni-Directional + Alden Wave Basin + Both + C Carderock Maneuvering & Seakeeping Basin + Both + Carderock Tow Tank 2 + Uni-Directional + Carderock Tow Tank 3 + Uni-Directional + Chase Tow Tank + Uni-Directional + Coastal Harbors Modeling Facility + Uni-Directional + Coastal Inlet Model Facility + Uni-Directional + Coastal Structures Modeling Complex + Both + D Davidson Laboratory Tow Tank + Uni-Directional + DeFrees Large Wave Basin + Uni-Directional + DeFrees Small Wave Basin + Uni-Directional + H Haynes Wave Basin + Both +

290

Refrigeration system having standing wave compressor  

DOE Patents [OSTI]

A compression-evaporation refrigeration system, wherein gaseous compression of the refrigerant is provided by a standing wave compressor. The standing wave compressor is modified so as to provide a separate subcooling system for the refrigerant, so that efficiency losses due to flashing are reduced. Subcooling occurs when heat exchange is provided between the refrigerant and a heat pumping surface, which is exposed to the standing acoustic wave within the standing wave compressor. A variable capacity and variable discharge pressure for the standing wave compressor is provided. A control circuit simultaneously varies the capacity and discharge pressure in response to changing operating conditions, thereby maintaining the minimum discharge pressure needed for condensation to occur at any time. Thus, the power consumption of the standing wave compressor is reduced and system efficiency is improved.

Lucas, Timothy S. (Glen Allen, VA)

1992-01-01T23:59:59.000Z

291

Emergent cosmological constant from colliding electromagnetic waves  

E-Print Network [OSTI]

In this study we advocate the view that the cosmological constant is of electromagnetic (em) origin, which can be generated from the collision of em shock waves coupled with gravitational shock waves. The wave profiles that participate in the collision have different amplitudes. It is shown that, circular polarization with equal amplitude waves does not generate cosmological constant. We also prove that the generation of the cosmological constant is related to the linear polarization. The addition of cross polarization generates no cosmological constant. Depending on the value of the wave amplitudes, the generated cosmological constant can be positive or negative. We show additionally that, the collision of nonlinear em waves in a particular class of Born-Infeld theory also yields a cosmological constant.

M. Halilsoy; S. Habib Mazharimousavi; O. Gurtug

2014-10-15T23:59:59.000Z

292

Wave Heating of the Solar Atmosphere  

E-Print Network [OSTI]

Magnetic waves are a relevant component in the dynamics of the solar atmosphere. Their significance has increased because of their potential as a remote diagnostic tool and their presumed contribution to plasma heating processes. We discuss our current understanding on coronal heating by magnetic waves, based on recent observational evidence and theoretical advances. The discussion starts with a selection of observational discoveries that have brought magnetic waves to the forefront of the coronal heating discussion. Then, our theoretical understanding on the nature and properties of the observed waves and the physical processes that have been proposed to explain observations are described. Particular attention is given to the sequence of processes that link observed wave characteristics with concealed energy transport, dissipation, and heat conversion. We conclude with a commentary on how the combination of theory and observations should help us understanding and quantifying magnetic wave heating of the sola...

Arregui, I

2015-01-01T23:59:59.000Z

293

Some Wave Equations for Electromagnetism and Gravitation  

E-Print Network [OSTI]

The paper studies the inferences of wave equations for electromagnetic fields when there are gravitational fields at the same time. In the description with the algebra of octonions, the inferences of wave equations are identical with that in conventional electromagnetic theory with vector terminology. By means of the octonion exponential function, we can draw out that the electromagnetic waves are transverse waves in a vacuum, and rephrase the law of reflection, Snell's law, Fresnel formula, and total internal reflection etc. The study claims that the theoretical results of wave equations for electromagnetic strength keep unchanged in the case for coexistence of gravitational and electromagnetic fields. Meanwhile the electric and magnetic components of electromagnetic waves can not be determined simultaneously in electromagnetic fields.

Zi-Hua Weng

2010-08-11T23:59:59.000Z

294

The Nonlinear Essence of Gravitational Waves  

E-Print Network [OSTI]

A critical review of gravitational wave theory is made. It is pointed out that the usual linear approach to the gravitational wave theory is neither conceptually consistent nor mathematically justified. Relying upon that analysis it is then argued that -- analogously to a Yang-Mills propagating field, which must be nonlinear to carry its gauge charge -- a gravitational wave must necessarily be nonlinear to transport its own charge -- that is, energy-momentum.

R. Aldrovandi; J. G. Pereira; K. H. Vu

2007-09-11T23:59:59.000Z

295

Speed selection for coupled wave equations  

E-Print Network [OSTI]

We discuss models for coupled wave equations describing interacting fields, focusing on the speed of travelling wave solutions. In particular, we propose a general mechanism for selecting and tuning the speed of the corresponding (multi-component) travelling wave solutions under certain physical conditions. A number of physical models (molecular chains, coupled Josephson junctions, propagation of kinks in chains of adsorbed atoms and domain walls) are considered as examples.

Mariano Cadoni; Giuseppe Gaeta

2015-01-13T23:59:59.000Z

296

Sharp shock model for propagating detonation waves  

SciTech Connect (OSTI)

Recent analyses of the reactive Euler equations have led to an understanding of the effect of curvature on an underdriven detonation wave. This advance can be incorporated into an improved sharp shock model for propagating detonation waves in hydrodynamic calculations. We illustrate the model with two simple examples: time dependent propagation of a diverging detonation wave in 1-D, and the steady 2-D propagation of a detonation wave in a rate stick. Incorporating this model into a 2-D front tracking code is discussed. 20 refs., 3 figs.

Bukiet, B.; Menikoff, R.

1989-01-01T23:59:59.000Z

297

Holographic p-wave Josephson junction  

E-Print Network [OSTI]

In this work we generalized holographic model for s-wave DC Josephson junction constructed in arXiv:1101.3326[hep-th] to a holographic description for p-wave Josephson junction. By solving numerically the coupled equations of motion of Yang-Mills theory for a non-Abelian SU(2) gauge fields in (3+1)-dimensional AdS spacetimes, we shown that DC current of the p-wave Josephson junction is proportional to the sine of the phase difference across the junction like the s-wave case.

Wang, Yong-Qiang; Zhao, Zhen-Hua

2011-01-01T23:59:59.000Z

298

Holographic p-wave Josephson junction  

E-Print Network [OSTI]

In this work we generalized holographic model for s-wave DC Josephson junction constructed in arXiv:1101.3326[hep-th] to a holographic description for p-wave Josephson junction. By solving numerically the coupled equations of motion of Yang-Mills theory for a non-Abelian SU(2) gauge fields in (3+1)-dimensional AdS spacetimes, we shown that DC current of the p-wave Josephson junction is proportional to the sine of the phase difference across the junction like the s-wave case.

Yong-Qiang Wang; Yu-Xiao Liu; Zhen-Hua Zhao

2011-09-20T23:59:59.000Z

299

Fast methods for inverse wave scattering problems  

E-Print Network [OSTI]

Inverse wave scattering problems arise in many applications including computerized/diffraction tomography, seismology, diffraction/holographic grating design, object identification from radar singals, and semiconductor ...

Lee, Jung Hoon, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

300

European Wave and Tidal Energy Conference  

Broader source: Energy.gov [DOE]

The European Wave and Tidal Energy Conference (EWTEC) series are international, technical and scientific conferences, focussed on ocean renewable energy and widely respected for their commitment to...

Note: This page contains sample records for the topic "wave buoy hk" 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

Kinetic Wave Power | Open Energy Information  

Open Energy Info (EERE)

Wave Power Address: 2861 N Tupelo St Place: Midland Zip: 48642 Region: United States Sector: Marine and Hydrokinetic Phone Number: 989-839-9757 Website: http:...

302

Surface acoustic wave for microfluidic applications.  

E-Print Network [OSTI]

??Surface acoustic wave-based (SAW) microfluidics attracts attention from microfluidic research community due to its simple fabrication, large force and fast, yet efficient operation. The scope… (more)

Luong, Trung Dung.

2012-01-01T23:59:59.000Z

303

Emergence of exponentially small reflected waves  

E-Print Network [OSTI]

We study the time-dependent scattering of a quantum mechanical wave packet at a barrier for energies larger than the barrier height, in the semi-classical regime. More precisely, we are interested in the leading order of the exponentially small scattered part of the wave packet in the semiclassical parameter when the energy density of the incident wave is sharply peaked around some value. We prove that this reflected part has, to leading order, a Gaussian shape centered on the classical trajectory for all times soon after its birth time. We give explicit formulas and rigorous error bounds for the reflected wave for all of these times.

Volker Betz; Alain Joye; Stefan Teufel

2008-04-23T23:59:59.000Z

304

ARM - Lesson Plans: Moving Water and Waves  

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

Moving Water and Waves Outreach Home Room News Publications Traditional Knowledge Kiosks Barrow, Alaska Tropical Western Pacific Site Tours Contacts Students Study Hall About ARM...

305

Microsoft Word - Wave Erosion Lesson1.doc  

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

many causes of coastal erosion that include storms, changes in permafrost, flooding, sea level rise, and waves. The retreat of coastal land can cause irreversible damage to the...

306

Euro Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Euro Wave Energy Region: Norway Sector: Marine and Hydrokinetic Website: http:www.eurowaveenergy.com This company is listed in the Marine and Hydrokinetic Technology Database....

307

Lower Hybrid to Whistler Wave Conversion  

SciTech Connect (OSTI)

In this presentation we discuss recent work concerning the conversion of whistler waves to lower hybrid waves (as well as the inverse process). These efforts have been motivated by the issue of attenuation of upward propagating whistler waves in the ionosphere generated by VLF transmitters on the ground, i.e., the 'Starks 20 db' problem, which affects the lifetimes of energetic electrons trapped in the geomagnetic field at low magnetic altitude (L). We discuss recent fluid and kinetic plasma simulations as well as ongoing experiments at UCLA to quantify linear and nonlinear mode conversion of lower hybrid to whistler waves.

Winske, Dan [Los Alamos National Laboratory

2012-07-16T23:59:59.000Z

308

Conjugate memory effect of random scattered waves  

Science Journals Connector (OSTI)

The correlation function between two speckle patterns produced by different incident waves is studied by means of stochastic approaches. The angular-frequency memory effect, which...

Kawanishi, Tetsuya; Wang, Zhi Liang; Izutsu, Masayuki; Ogura, Hisanao

1999-01-01T23:59:59.000Z

309

Encircled energy of diffracted converging spherical waves  

Science Journals Connector (OSTI)

We studied the diffraction phenomenon of a circular aperture that was illuminated by a monochromatic converging spherical wave. The theoretical part of this study was based on the...

Li, Yajun

1983-01-01T23:59:59.000Z

310

Sandia National Laboratories: wave energy converters  

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

is a partnered effort to develop marine hydrokinetic (MHK) reference models (RMs) for wave energy converters and tidal, ocean, and river current energy converters. The RMP team...

311

Measurements and Linear Wave Theory Based Simulations of Vegetated Wave Hydrodynamics for Practical Applications  

E-Print Network [OSTI]

density exceeding some threshold where maximum wave attenuation capabilities are exceeded and lowering of damping ensues. Additionally, wave attenuation increased with higher stem spatial variation due to less wake sheltering. A one-dimensional model...

Anderson, Mary Elizabeth

2011-10-21T23:59:59.000Z

312

A One-Dimensional Propagation of Shock Wave Supported by Atmospheric Millimeter-Wave Plasma  

Science Journals Connector (OSTI)

A shock wave supported by an atmospheric breakdown plasma caused by a high-power millimeter-wave ... was detached from the ionization front of the plasma whenever the propagation velocity of the ionization ... . ...

Yasuhisa Oda; Toshikazu Yamaguchi…

2011-06-01T23:59:59.000Z

313

Implications of the semigeostrophic nature of Rossby waves for Rossby wave packet detection  

Science Journals Connector (OSTI)

Upper tropospheric Rossby wave packets have received increased attention recently. In most previous studies wave packets have been detected by computing the envelope of the meridional wind field using either complex demodulation or a Hilbert ...

Gabriel Wolf; Volkmar Wirth

314

Reflection of electromagnetic waves from mixtures of plane gravitational and scalar waves  

E-Print Network [OSTI]

We consider colliding wave packets consisting of hybrid mixtures of electromagnetic, gravitational and scalar waves. Irrespective of the scalar field, the electromagnetic wave still reflects from the gravitational wave. Some reflection processes are given for different choice of packets in which the Coulomb-like component $\\Psi_2$ vanishes. Exact solution for multiple reflection of an electromagnetic wave from successive impulsive gravitational waves is obtained in a closed form. It is shown that a succesive sign flip in the Maxwell spinor arises as a result of encountering with an impulsive train (i.e. the Dirac's comb curvature) of gravitational waves. Such an observable effect may be helpful in the detection of gravitational wave bursts.

Ozay Gurtug; Mustafa Halilsoy; Ozlem Unver

2006-08-22T23:59:59.000Z

315

Shock Waves in Space Environments  

Science Journals Connector (OSTI)

We present results on two topics: a) The three?dimensional (3D) Hybrid Heliospheric Modeling System with Pickup Ions (HHMS?PI) simulations of shock waves and initial comparisons with ACE and Ulysses data for the Halloween 2003 solar events including the Ulysses SWICS pickup proton densities; and b) Our analyses of Voyager 2 (V2) data near the termination shock (TS). Previously we used our time?dependent 3D Hybrid Heliospheric Modeling System (HHMS) for magnetohydrodynamic (MHD) simulations of transient events originating on the Sun. We now have added the physics of “pickup” proton processes to these models. Interstellar neutral hydrogen flows into the heliosphere and becomes ionized by photoionization and by charge exchange with solar wind protons. These “pickup” protons cause a slowing and heating of the solar wind flow in the outer heliosphere. Both HHMS?PI and HHMS use continuous solar inputs to simulate processes that originate at the Sun. Our V2 analyses identified some elevated readings in the plasma subsystem (PLS) data. It is tempting to interpret these at face value as detections of high energy ions (HEIs) which may interact with the bulk convective plasma through a two stream instability giving rise to the observed enhanced signals in the plasma wave subsystem (PWS).

Devrie S. Intriligator; Thomas Detman; James Intriligator; Christine Gloeckler; Wei Sun; W. David Miller; William R. Webber; Murray Dryer

2009-01-01T23:59:59.000Z

316

Neutron Star Crustal Interface Waves  

Science Journals Connector (OSTI)

The eigenfrequencies of nonradial oscillations are a powerful probe of a star's interior structure. This is especially true when there exist discontinuities such as at the neutron star (NS) ocean/crust boundary, as first noted by McDermott, Van Horn, & Hansen. The interface mode associated with this boundary has subsequently been neglected in studies of stellar nonradial oscillations. We revisit this mode, investigating its properties both analytically and numerically for a simple NS envelope model. We find that it acts like a shallow surface ocean wave, but with a large radial displacement at the ocean/crust boundary due to flexing of the crust with shear modulus ? P, the pressure. This displacement lowers the mode's frequency by a factor of ~(?/P)1/2 ~ 0.1 in comparison to a shallow surface wave frequency on a hard surface. The interface mode may be excited on accreting or bursting NSs, and future work on nonradial oscillations should consider this mode. Our work also implies an additional mode on massive and/or cold white dwarfs with crystalline cores, which may have a frequency between the f-mode and g-modes, an otherwise empty part of the frequency domain.

Anthony L. Piro; Lars Bildsten

2005-01-01T23:59:59.000Z

317

Gravitational waves versus cosmic strings  

Science Journals Connector (OSTI)

The equation which governs the temporal evolution of a gravitational wave (GW) in curved space-time can be treated as the Schrodinger equation for a particle moving in the presence of an effective potential. When GWs propagate in an expanding Universe with constant effective potential, there is a critical value (kc) of the comoving wave-number which discriminates the metric perturbations into oscillating (k > kc) and non-oscillating (k kc) modes. The effective potential is reduced to a non-vanishing constant in a cosmological model which is driven by a two-component fluid, consisting of radiation (dominant) and cosmic strings (subdominant). However, the cosmological evolution (gradually) results in the scaling of any long-cosmic-string network and, therefore, after some time (??) the Universe enters in the pure-radiation epoch. The evolution of the non-oscillatory GW modes during ??, results in the distortion of the low-frequency part of the stochastic GW power-spectrum, which, therefore, departs from scale invariance (anticipated in the pure-radiation case). As regards the corresponding high-frequency part (which is determined by the evolution of the oscillating modes), we find that the presence of cosmic strings gives rise to the quantum-gravitational creation of gravitons, leading to the amplification of the GW signal by (almost) two orders of magnitude.

Kostas Kleidis

2009-01-01T23:59:59.000Z

318

DeFrees Large Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Large Wave Basin Large Wave Basin Jump to: navigation, search Basic Specifications Facility Name DeFrees Large Wave Basin Overseeing Organization Cornell University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 32.0 Beam(m) 0.6 Depth(m) 0.9 Water Type Freshwater Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 64 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Computer controlled 4m hydraulic wave paddle stroke allows a series of solitary waves to be generated; arbitrary wave shape possible Wave Direction Uni-Directional Simulated Beach Yes

319

Can We Measure the Wave Function of a SingleWave Packet of Light?  

E-Print Network [OSTI]

Can We Measure the Wave Function of a SingleWave Packet of Light? Brownian Motion and Continuous Wave Packet Collapse in RepeatedWeak Quantum Nondemolition Measurements ORLY ALTER AND YOSHIHISA information about the physical system under consideration. The result of a precise measurement on a single

Utah, University of

320

Electromagnetic waves and Stokes parameters in the wake of a gravitational wave  

E-Print Network [OSTI]

A theoretical description of electromagnetic waves in the background of a (weak) gravitational wave is presented. Explicit expressions are obtained for the Stokes parameters during the passage of a plane-fronted gravitational wave described by the Ehlers-Kundt metric. In particular, it is shown that the axis of the polarization ellipse oscillates, its ellipticity remaining constant.

Shahen Hacyan

2012-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


321

Introduction Idealized Moist Jet/Front Waves Ray Tracing Momentum Flux/Forcing Conclusion Gravity Waves  

E-Print Network [OSTI]

Introduction Idealized Moist Jet/Front Waves Ray Tracing Momentum Flux/Forcing Conclusion Gravity Waves in Moist Baroclinic Jet-Front Systems Junhong Wei, Fuqing Zhang Department of Meteorology The Pennsylvania State University Tuesday 19th August, 2014 #12;Introduction Idealized Moist Jet/Front Waves Ray

Thompson, Anne

322

Plane wave solution for elastic wave scattering by a heterogeneous fracture  

E-Print Network [OSTI]

Plane wave solution for elastic wave scattering by a heterogeneous fracture Seiji Nakagawa,a) Kurt for computing the three-dimensional scattering of propagating elastic waves by a planar fracture with heterogeneous fracture compliance distribution is presented. This method is based upon the spatial Fourier

Santos, Juan

323

NONLINEAR ELASTIC WAVE NDE II. NONLINEAR WAVE MODULATION SPECTROSCOPY AND NONLINEAR TIME  

E-Print Network [OSTI]

NONLINEAR ELASTIC WAVE NDE II. NONLINEAR WAVE MODULATION SPECTROSCOPY AND NONLINEAR TIME REVERSED. This paper presents the second part of the review of Nonlinear Elastic Wave Spectroscopy (NEWS) in NDE, and describe two different methods of nonlinear NDE that provide not only damage detection but location as well

324

On Wave Breaking and the Equilibrium Spectrum of Wind-Generated Waves  

Science Journals Connector (OSTI)

...Equilibrium Spectrum of Wind-Generated Waves M...is made of the loss of energy by wave breaking in a...g the proportion of energy lost per mean wave cycle...equilibrium state the loss of energy by breaking is comparable to that supplied by the wind, one can estimate the...

1969-01-01T23:59:59.000Z

325

Wave Climate and Trends for the Gulf of Mexico: A 30-Yr Wave Hindcast  

Science Journals Connector (OSTI)

This paper describes wave climate and variability in the Gulf of Mexico based on a 30-yr wave hindcast. The North American Regional Reanalysis wind fields are employed to drive a third-generation spectral wave model with high spatial (0.005°–0.06°)...

Christian M. Appendini; Alec Torres-Freyermuth; Paulo Salles; Jose López-González; E. Tonatiuh Mendoza

2014-02-01T23:59:59.000Z

326

Violent Wave Motion due to Impact Violent Wave Motion due to Impact  

E-Print Network [OSTI]

Violent Wave Motion due to Impact Violent Wave Motion due to Impact Mark J. Cooker School of Mathematics, University of East Anglia, Norwich, England. m.cooker@uea.ac.uk Theory of Water Waves, Cambridge Motion due to Impact 2. Pressure-Impulse Theory 214 M.J. COOKER AND D.H. PEREGRINE Y; O: .-- I mpact zone

327

Physics Waves Worksheet Solutions 1. The diagram on the right shows a wave  

E-Print Network [OSTI]

the oscillations of the string separated by 1.0 m along the wave is (a) /4 (b) /2 (c) (d) 2 Answer (b it moving upwards at maximum speed 2. A standing wave is generated on a string which is fixed at both ends, and vibrates at its fundamental frequency. The tension of the string is now increased and a new standing wave

328

5 - Surface Wave Plasma Sources  

Science Journals Connector (OSTI)

Publisher Summary This chapter summarizes the advantages of the surface wave (SW) plasma sources. It includes a summary of the wave and plasma properties of SW sustained plasma columns, review of the essential parts composing a SW plasma source; describes a family of efficient SW launchers for such plasma sources, dwells on three typical experimental arrangements and a brief summary recalling the advantages of SW plasma sources. Surface wave discharges have the advantage of the broadest operating conditions in terms of frequency, tube dimensions and shape, and gas pressure. For example they can be utilized over both the RF (radiofrequency) and microwave domains, which permits one to optimize given processes as a function of frequency (generally through changes in the electron energy distribution function). A further advantage of SW plasmas is that they are the best modeled HF plasmas. This provides insight into HF discharges in general since, to a first approximation, the local plasma properties of SW discharges are the same as in all RF and microwave discharges under given discharge conditions, and for a given HF power density deposited in the plasma. Compared to other RF and microwave plasma sources, SW discharges are undoubtedly the most flexible ones. They also are efficient discharges since very little HF power is lost in the impedance matching circuit. Finally, a major future avenue for these discharges is their operation as magnetized plasmas. As a first approach to presenting surface wave (SW) plasma sources, let us consider their distinctive features with respect to the other plasma sources described in the book:o1. The discharge can be sustained far away from the active zone of the field applicator. This is because the electric field supporting the discharge is provided by a wave that carries away the power from the applicator. It is an electromagnetic surface wave whose sole guiding structure is the plasma column that it sustains and the dielectric tube enclosing it [1]–[3]. This is, thus, a non-cumbersome method for producing long plasma columns; plasma columns up to 6 meters in length have been achieved in our laboratory while launching the wave with a field applicator that surrounded the discharge tube over a few centimeters in length only. [4][5] 2. The range of the applied field frequency f=?/2? is the broadest of all kinds of high frequency (HF) sustained plasma sources. We have succeeded in realizing HF power transfer to the discharge efficiently from approximately 10 \\{MHz\\} to 10 \\{GHz\\} [6] and, with impaired coupling efficiency, down to 200 kHz [7]. This frequency range includes radiofrequencies (RF) and the lower part of the microwave frequency spectrum; we use the term high frequencies to designate RF as well as microwave frequencies. An interesting aspect of this frequency flexibility is the possibility of acting on the electron energy distribution function (EEDF) to optimize a given plasma process [8]. 3. The gas pressure range is extremely large. On the one hand, one can operate SW discharges in the sub-mtorr range under electron cyclotron resonance (ECR) conditions, [9] while, on the other hand, it is possible to sustain a stable plasma of a few millimeters diameter at pressures at least a few times atmospheric pressure [10]. 4. The range of plasma, density, n, is very large. At reduced pressure and with f in the few \\{MHz\\} range, n, can be as low as 108 cm?3, [7] while at atmospheric pressure it can exceed 1015 cm?3[10] A related parameter is the degree of ionization ?i, i.e. the plasma density relative to the initial neutral atom concentration. Under ECR conditions, for example with f=2.45 \\{GHz\\} where n can reach up to a few 1012 cm?3, ?i ranges approximately from 0.1–10%, whereas in the above-mentioned atmospheric pressure case, it is smaller than 10?4. The higher n, the higher the rate of plasma processes depending on ions or on neutral particles (e.g., atoms, radicals) when the latter are obtained through electron collisions [8]. Large ?i values favor the existence of

Michel Moisan; Joëlle Margot; Zenon Zakrzewski

1996-01-01T23:59:59.000Z

329

Directional Spectra of Wind-Generated Waves  

Science Journals Connector (OSTI)

...H. Hui From observations of wind and of water surface elevation...the directional spectrum of wind-generated waves on deep water...inversely proportional to the fourth power of the frequency , with the...clearly dependent on the ratio of wind speed to peak wave speed...

1985-01-01T23:59:59.000Z

330

INTRODUCTION In detonation wave computations involving  

E-Print Network [OSTI]

INTRODUCTION In detonation wave computations involving curved detonation fronts, accurate solutions to compute solutions to detonation prob­ lems without numerically resolving the reaction zone. For planar detonation waves, algebraic jump conditions which do not depend on the dynamics within the reaction zone can

Bukiet, Bruce

331

Gravitational dispersion in a torsional wave machine  

E-Print Network [OSTI]

We demonstrate that mechanical waves traveling in a torsional, mechanical wave machine exhibit dispersion due to gravity and the discreteness of the medium. We also show that although the dispersion due to discreteness is negligible, the dispersion due to gravity can be easily measured, and can be shown to disappear in a zero-gravity environment.

Rafael de la Madrid; Alejandro Gonzalez; George Irwin

2014-09-01T23:59:59.000Z

332

First Plasma Wave Observations at Neptune  

Science Journals Connector (OSTI)

...the electric field of plasma waves and radio emissions...range from 10 Hz to 56.2 kHz. Further information...high frequencies (>100 kHz) as much as 30 days before...closest approach (2), the plasma wave in-strument did...low frequencies (kHz) until only a few days...

D. A. Gurnett; W. S. Kurth; R. L. Poynter; L. J. Granroth; I. H. Cairns; W. M. Macek; S. L. Moses; F. V. Coroniti; C. F. Kennel; D. D. Barbosa

1989-12-15T23:59:59.000Z

333

First Plasma Wave Observations at Uranus  

Science Journals Connector (OSTI)

...ring plane crossing, the plasma wave instrument detected...kilometers. BRIDGE, H.S., PLASMA OBSERVATIONS NEAR URANUS...RADIO-EMISSION FROM URANUS AT 0.5 MHZ, ASTROPHYSICAL JOURNAL...SATURN BY THE VOYAGER PLASMA-WAVE INSTRUMENT, ICARUS...position where the 97.2-kHz radiation was blocked...

D. A. GURNETT; W. S. KURTH; F. L. SCARF; R. L. POYNTER

1986-07-04T23:59:59.000Z

334

Solar coronal heating by magnetosonic waves  

Science Journals Connector (OSTI)

......presence of MHD waves in the solar corona. Saba Strong...data acquired by the Solar Maximum Mission (SMM...emission lines came the SOHO project (Doyle, Teriaca Banerjee...calculated the Alfven wave energy flux density as for...and a combination of Solar Untraviolet Measurements......

E. R. Pekünlü; Ö. Çakirli; E. Özetken

2001-09-11T23:59:59.000Z

335

WAVE-DRIVEN SURFACE FROM HF RADAR  

E-Print Network [OSTI]

experiments using the University of Miami's Ocean Surface Current Radar (OSCR) (Shay et al., 1995, 1997 to the internal wave signals. Observations The HF radar system mapped the coastal ocean currents over a 30 Ã? 45 kmFEATURE INTERNAL CURRENTS WAVE-DRIVEN SURFACE FROM HF RADAR By Lynn K. Shay Observations from

Miami, University of

336

Wave energy extraction by coupled resonant absorbers  

Science Journals Connector (OSTI)

...alter those natural frequencies more readily, and...fundamental sloshing frequency in the tank is lowered...fundamental sloshing frequency is located at an...over-topping absorber wave energy converter We develop...sloshing motions in response to wave forcing...is to control the storage of a head of water...

2012-01-01T23:59:59.000Z

337

Wave propagation in the magnetic sun  

E-Print Network [OSTI]

This paper reports on efforts to simulate wave propagation in the solar interior. Presented is work on extending a numerical code for constant entropy acoustic waves in the absence of magnetic fields to the case where magnetic fields are present. A set of linearized magnetohydrodynamic (MHD) perturbation equations has been derived and implemented.

T. Hartlep; M. S. Miesch; N. N. Mansour

2008-05-03T23:59:59.000Z

338

Interaction of Gravitational Waves with Charged Particles  

E-Print Network [OSTI]

It is shown here that a cloud of charged particles could in principle absorb energy from gravitational waves (GWs) incident upon it, resulting in wave attenuation. This could in turn have implications for the interpretation of future data from early universe GWs.

Wickramasinghe, Thulsi; Revalski, Mitchell

2015-01-01T23:59:59.000Z

339

Comments on the radial plane waves  

E-Print Network [OSTI]

The orthogonality of the radial plane waves, introduced by Fujikawa, turns out to be broken for the case of infinite volume. We will find, though they become overcomplete, the concept of the radial plane waves remains useful for constructing radial path integrals.

Seiji Sakoda

2009-07-30T23:59:59.000Z

340

Environmental Data Collection Using Autonomous Wave Gliders  

E-Print Network [OSTI]

Environmental Data Collection Using Autonomous Wave Gliders LCDR Kate Hermsdorfer Qing Wang model ­AIRMAR PB200 weather station Pressure, Temperature, Wind Speed and Direction 10 min averaged sea conditions Bulk flux estimates 2-D wave spectra Water temperature profile Autonomous

Note: This page contains sample records for the topic "wave buoy hk" 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

Wave Propagation in Fractured Poroelastic Media  

E-Print Network [OSTI]

and mining. In geophysical prospecting, reservoir development and CO2 storage in geological formations-scale heterogeneities due to patchy brine-CO2 saturation and fractal porosity (fractal frame properties). Wave conditions associated with compressibility and shear tests, which are solved using the FE method. Wave

Santos, Juan

342

Phase Correlation of Electrons and Langmuir Waves  

E-Print Network [OSTI]

elsewhere in the solar system and beyond. For example, the generation of auroral roar is similar mode conversion of Lang- muir waves in the solar wind, and recent observations of structured type III, the Langmuir/upper hybrid waves radiate away some of their energy into elec- tromagnetic radiation, which can

California at Berkeley, University of

343

Discrete control of resonant wave energy devices  

Science Journals Connector (OSTI)

...time domain, which allows us to find non-harmonic...first applied to the wave energy area by Hoskin Nichols...Clement, A. H. 2002Wave energy in Europe: current status and perspectivesRenew. Sustain. Energy Rev. 6 405431 10.1016...

2012-01-01T23:59:59.000Z

344

Plasma Waves Near Venus: Initial Observations  

Science Journals Connector (OSTI)

...noise, damping of the waves by the ionospheric electrons can be an important interaction mecha-nism that transfers solar wind energy di-rectly to the ionosphere. The measurements of plasma wave ac-tivity near Venus are made by using a vee-type...

F. L. SCARF; W. W. L. TAYLOR; I. M. GREEN

1979-02-23T23:59:59.000Z

345

On the Energy of Rotating Gravitational Waves  

E-Print Network [OSTI]

A class of solutions of the gravitational field equations describing vacuum spacetimes outside rotating cylindrical sources is presented. A subclass of these solutions corresponds to the exterior gravitational fields of rotating cylindrical systems that emit gravitational radiation. The properties of these rotating gravitational wave spacetimes are investigated. In particular, we discuss the energy density of these waves using the gravitational stress-energy tensor.

Bahram Mashhoon; James C. McClune; Enrique Chavez; Hernando Quevedo

1996-09-06T23:59:59.000Z

346

Shock waves on complex networks  

E-Print Network [OSTI]

Power grids, road maps, and river streams are examples of infrastructural networks which are highly vulnerable to external perturbations. An abrupt local change of load (voltage, traffic density, or water level) might propagate in a cascading way and affect a significant fraction of the network. Almost discontinuous perturbations can be modeled by shock waves which can eventually interfere constructively and endanger the normal functionality of the infrastructure. We study their dynamics by solving the Burgers equation under random perturbations on several real and artificial directed graphs. Even for graphs with a narrow distribution of node properties (e.g., degree or betweenness), a steady state is reached exhibiting a heterogeneous load distribution, having a difference of one order of magnitude between the highest and average loads. Unexpectedly we find for the European power grid and for finite Watts-Strogatz networks a broad pronounced bimodal distribution for the loads. To identify the most vulnerable...

Mones, Enys; Vicsek, Tamás; Herrmann, Hans J

2014-01-01T23:59:59.000Z

347

Gravitational waves, diffusion and decoherence  

E-Print Network [OSTI]

The quite different behaviors exhibited by microscopic and macroscopic systems with respect to quantum interferences suggest that there may exist a naturally frontier between quantum and classical worlds. The value of the Planck mass (22$\\mu$g) may lead to the idea of a connection between this borderline and intrinsic fluctuations of spacetime. We show that it is possible to obtain quantitative answers to these questions by studying the diffusion and decoherence mechanisms induced on quantum systems by gravitational waves generated at the galactic or cosmic scales. We prove that this universal fluctuating environment strongly affects quantum interferences on macroscopic systems, while leaving essentially untouched those on microscopic systems. We obtain the relevant parameters which, besides the ratio of the system's mass to Planck mass, characterize the diffusion constant and decoherence time. We discuss the feasibility of experiments aiming at observing these effects in the context of ongoing progress towar...

Reynaud, Serge; Jaekel, Marc-Thierry

2008-01-01T23:59:59.000Z

348

On Wave-Particle Duality  

E-Print Network [OSTI]

By means of a thought-experiment, consisting of an interference experiment with two interfering beams, it is shown that it can be demonstrated experimentally that with one single particle a wave can be associated which propagates in space and time as a physical reality, i.e. that it should not merely be considered as a distribution of probabilities. The notion "physical reality" should be understood such that, when this physical reality is considered in a particular space at a particular time, it should be experimentally possible to influence this reality in such a way that future results of experiments show unambiguously that this reality has been causally influenced by the experimental act in this space and at that time.

De Baere, W

1953-01-01T23:59:59.000Z

349

Spin Waves and Neutron Scattering  

Science Journals Connector (OSTI)

A review is given of the problems in this field and of the possibilities opened up by the fact that neutron scattering gives access to the time?dependent spin?correlation function in magnets over virtually the whole range of q t and T. New experimental results are given in connection with magnon energy linewidth and renormalization and some data are presented for the spin?wave stiffness of bcc 3d transition?metal alloys as a function of electron concentration showing effects explained by the electronic density?of?states curve. It is pointed out that the ground?state fluctuations of magnets give rise to effects in the formulas for neutron scattering.

R. D. Lowde

1965-01-01T23:59:59.000Z

350

Long-Wave Infrared | Open Energy Information  

Open Energy Info (EERE)

Long-Wave Infrared Long-Wave Infrared Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Long-Wave Infrared Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: Passive Sensors Parent Exploration Technique: Passive Sensors Information Provided by Technique Lithology: Map characteristic minerals associated with hot springs/mineral deposits Stratigraphic/Structural: Hydrological: Thermal: Map surface temperatures Dictionary.png Long-Wave Infrared: Long Wave Infrared (LWIR) refers to multi- and hyperspectral data collected in the 8 to 15 µm wavelength range. LWIR surveys are sometimes referred to as "thermal imaging" and can be used to identify relatively warm features

351

Surface acoustic wave dust deposition monitor  

DOE Patents [OSTI]

A system is disclosed for using the attenuation of surface acoustic waves to monitor real time dust deposition rates on surfaces. The system includes a signal generator, a tone-burst generator/amplifier connected to a transmitting transducer for converting electrical signals into acoustic waves. These waves are transmitted through a path defining means adjacent to a layer of dust and then, in turn, transmitted to a receiving transducer for changing the attenuated acoustic wave to electrical signals. The signals representing the attenuated acoustic waves may be amplified and used in a means for analyzing the output signals to produce an output indicative of the dust deposition rates and/or values of dust in the layer. 8 figs.

Fasching, G.E.; Smith, N.S. Jr.

1988-02-12T23:59:59.000Z

352

Instability of nonlinear dispersive solitary waves  

Science Journals Connector (OSTI)

We consider linear instability of solitary waves of several classes of dispersive long wave models. They include generalizations of KDV, BBM, regularized Boussinesq equations, with general dispersive operators and nonlinear terms. We obtain criteria for the existence of exponentially growing solutions to the linearized problem. The novelty is that we dealt with models with nonlocal dispersive terms, for which the spectra problem is out of reach by the Evans function technique. For the proof, we reduce the linearized problem to study a family of nonlocal operators, which are closely related to properties of solitary waves. A continuation argument with a moving kernel formula is used to find the instability criteria. These techniques have also been extended to study instability of periodic waves and of the full water wave problem.

Zhiwu Lin

2008-01-01T23:59:59.000Z

353

Instability of nonlinear dispersive solitary waves  

E-Print Network [OSTI]

We consider linear instability of solitary waves of several classes of dispersive long wave models. They include generalizations of KDV, BBM, regularized Boussinesq equations, with general dispersive operators and nonlinear terms. We obtain criteria for the existence of exponentially growing solutions to the linearized problem. The novelty is that we dealt with models with nonlocal dispersive terms, for which the spectra problem is out of reach by the Evans function technique. For the proof, we reduce the linearized problem to study a family of nonlocal operators, which are closely related to properties of solitary waves. A continuation argument with a moving kernel formula are used to find the instability criteria. Recently, these techniques have also been extended to study instability of periodic waves and to the full water wave problem.

Lin, Zhiwu

2008-01-01T23:59:59.000Z

354

Electromagnetic waves with nonlinear dispersion law  

E-Print Network [OSTI]

Last year physicists in Europe have measured the velocity of the neutrinos particles. They found the neutrinos moving faster than the speed of light in vacuum. This result means that Einstein's relativity principle and its consequences in modern physics need a global additional renovation. In present paper the part of this problem is considered in terms of basic Maxwell's method only. By means of introduction a diffusion like displacement current the new super wave equation was derived, which permits of its solution be described the electromagnetic waves moving some faster than the conventional speed of light in vacuum especially in a gamma ray of a very short wave length region. The unique properties of these waves are that they undergo nonlinear dispersion law, uppermost limit of which is restricted. Discussion of further experimental problems and a number of estimations are given for the macro physic super wave equations also.

Pavel Mednis

2012-02-08T23:59:59.000Z

355

Ultrasonic guided waves in eccentric annular pipes  

SciTech Connect (OSTI)

This paper studies the feasibility of using ultrasonic guided waves to rapidly inspect tubes and pipes for possible eccentricity. While guided waves are well established in the long range inspection of structures such as pipes and plates, studies for more complex cross sections are limited and analytical solutions are often difficult to obtain. Recent developments have made the Semi Analytical Finite Element (SAFE) method widely accessible for researchers to study guided wave properties in complex structures. Here the SAFE method is used to study the effect of eccentricity on the modal structures and velocities of lower order guided wave modes in thin pipes of diameters typically of interest to the industry. Results are validated using experiments. The paper demonstrates that even a small eccentricity in the pipe can strongly affect guided wave mode structures and velocities and hence shows potential for pipe eccentricity inspection.

Pattanayak, Roson Kumar; Balasubramaniam, Krishnan; Rajagopal, Prabhu [Centre for NDE, Indian Institute of Technology - Madras Chennai 600036, T. N. (India)

2014-02-18T23:59:59.000Z

356

DECIGO: The Japanese space gravitational wave antenna  

Science Journals Connector (OSTI)

DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the planned Japanese space gravitational wave antenna, aiming to detect gravitational waves from astrophysically and cosmologically significant sources mainly between 0.1 Hz and 10 Hz and thus to open a new window for gravitational wave astronomy and for the universe. DECIGO will consist of three drag-free spacecraft, 1000 km apart from each other, whose relative displacements are measured by a differential Fabry-Perot interferometer. We plan to launch DECIGO in middle of 2020s, after sequence of two precursor satellite missions, DECIGO pathfinder and Pre-DECIGO, for technology demonstration required to realize DECIGO and hopefully for detection of gravitational waves from our galaxy or nearby galaxies.

Shuichi Sato; Seiji Kawamura; Masaki Ando; Takashi Nakamura; Kimio Tsubono; Akito Araya; Ikkoh Funaki; Kunihito Ioka; Nobuyuki Kanda; Shigenori Moriwaki; Mitsuru Musha; Kazuhiro Nakazawa; Kenji Numata; Shin-ichiro Sakai; Naoki Seto; Takeshi Takashima; Takahiro Tanaka; Kazuhiro Agatsuma; Koh-suke Aoyanagi; Koji Arai; Hideki Asada; Yoichi Aso; Takeshi Chiba; Toshikazu Ebisuzaki; Yumiko Ejiri; Motohiro Enoki; Yoshiharu Eriguchi; Masa-Katsu Fujimoto; Ryuichi Fujita; Mitsuhiro Fukushima; Toshifumi Futamase; Katsuhiko Ganzu; Tomohiro Harada; Tatsuaki Hashimoto; Kazuhiro Hayama; Wataru Hikida; Yoshiaki Himemoto; Hisashi Hirabayashi; Takashi Hiramatsu; Feng-Lei Hong; Hideyuki Horisawa; Mizuhiko Hosokawa; Kiyotomo Ichiki; Takeshi Ikegami; Kaiki T Inoue; Koji Ishidoshiro; Hideki Ishihara; Takehiko Ishikawa; Hideharu Ishizaki; Hiroyuki Ito; Yousuke Itoh; Nobuki Kawashima; Fumiko Kawazoe; Naoko Kishimoto; Kenta Kiuchi; Shiho Kobayashi; Kazunori Kohri; Hiroyuki Koizumi; Yasufumi Kojima; Keiko Kokeyama; Wataru Kokuyama; Kei Kotake; Yoshihide Kozai; Hideaki Kudoh; Hiroo Kunimori; Hitoshi Kuninaka; Kazuaki Kuroda; Kei-ichi Maeda; Hideo Matsuhara; Yasushi Mino; Osamu Miyakawa; Shinji Miyoki; Mutsuko Y Morimoto; Tomoko Morioka; Toshiyuki Morisawa; Shinji Mukohyama; Shigeo Nagano; Isao Naito; Kouji Nakamura; Hiroyuki Nakano; Kenichi Nakao; Shinichi Nakasuka; Yoshinori Nakayama; Erina Nishida; Kazutaka Nishiyama; Atsushi Nishizawa; Yoshito Niwa; Taiga Noumi; Yoshiyuki Obuchi; Masatake Ohashi; Naoko Ohishi; Masashi Ohkawa; Norio Okada; Kouji Onozato; Kenichi Oohara; Norichika Sago; Motoyuki Saijo; Masaaki Sakagami; Shihori Sakata; Misao Sasaki; Takashi Sato; Masaru Shibata; Hisaaki Shinkai; Kentaro Somiya; Hajime Sotani; Naoshi Sugiyama; Yudai Suwa; Rieko Suzuki; Hideyuki Tagoshi; Fuminobu Takahashi; Kakeru Takahashi; Keitaro Takahashi; Ryutaro Takahashi; Ryuichi Takahashi; Tadayuki Takahashi; Hirotaka Takahashi; Takamori Akiteru; Tadashi Takano; Keisuke Taniguchi; Atsushi Taruya; Hiroyuki Tashiro; Yasuo Torii; Morio Toyoshima; Shinji Tsujikawa; Yoshiki Tsunesada; Akitoshi Ueda; Ken-ichi Ueda; Masayoshi Utashima; Yaka Wakabayashi; Hiroshi Yamakawa; Kazuhiro Yamamoto; Toshitaka Yamazaki; Jun'ichi Yokoyama; Chul-Moon Yoo; Shijun Yoshida; Taizoh Yoshino

2009-01-01T23:59:59.000Z

357

MHK Technologies/New Knowledge Wind and Wave Renewable Mobile Wind and Wave  

Open Energy Info (EERE)

Wind and Wave Renewable Mobile Wind and Wave Wind and Wave Renewable Mobile Wind and Wave Power Plant Platform < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage New Knowledge Wind and Wave Renewable Mobile Wind and Wave Power Plant Platform.jpg Technology Profile Primary Organization Darrel Dammen Technology Resource Click here Wave Technology Description Buoyant vessel attached to a lever the lever being attached to a stationary source like near shore Oil Rigs docks or a vessel less affected by swells and waves like large ships floating Oil rigs or boats the levers going up and down creates a torque at the pivot point by the vessel being raised and lowered this works on all size levers making it possible to collect energy from all size Waves with enough levers with in reasonable size and numbers the force can be used hydraulically mechanically or to compress air to power generators Ten tons going up and down is a lot of force when connected to a 100 so connecting to 100 tons then to 50 tons then to 25 tons then to 10 tons to 5 tons to 2 tons continuing down in size and multiplying the levers from the less affected floating object or stationary object will mean We collect energy from 1 foot to 100 foot waves and swells This Wind and Wave with 120 oarsmen showing buoyant vessels are the oarsman in this picture with hund

358

Wave spectral energy variability in the northeast Peter D. Bromirski  

E-Print Network [OSTI]

Wave spectral energy variability in the northeast Pacific Peter D. Bromirski Integrative January 2005; published 8 March 2005. [1] The dominant characteristics of wave energy variability] s wave spectral energy components are considered separately. Empirical orthogonal function (EOF) analyses

Bromirski, Peter D.

359

On the gravitational fields created by the electromagnetic waves  

E-Print Network [OSTI]

We show that the Maxwell equations describing an electromagnetic wave are a mathematical consequence of the Einstein equations for the same wave. This fact is significant for the problem of the Einsteinian metrics corresponding to the electromagnetic waves.

A. Loinger; T. Marsico

2011-06-11T23:59:59.000Z

360

Floating type ocean wave power station equipped with hydroelectric unit  

Science Journals Connector (OSTI)

The authors have invented the unique ocean wave power station, which is composed of the floating ... wave pitch and the counter-rotating type wave power unit, its runners are submerged in the ... as requested, be...

Shun Okamoto; Toshiaki Kanemoto; Toshihiko Umekage

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Parametrically Driven Ion Cyclotron Waves and Intense Ion Heating  

Science Journals Connector (OSTI)

Finite-amplitude plasma waves excited by plates outside a plasma column are shown to decay into other plasma waves and electrostatic ion cyclotron waves, accompanied by ion heating.

T. K. Chu; S. Bernabei; R. W. Motley

1973-07-23T23:59:59.000Z

362

Energy Dissipation of Unsteady Wave Breaking on Currents  

Science Journals Connector (OSTI)

Energy dissipation for unsteady deep-water breaking in wave groups on following and opposing currents, including partial wave-blocking conditions, was investigated by detailed laboratory measurements. A range of focusing wave conditions, ...

Aifeng Yao; Chin H. Wu

2004-10-01T23:59:59.000Z

363

Energy Absorption from Ocean Waves: A Free Ride for Cetaceans  

Science Journals Connector (OSTI)

...cetaceans are capable of absorbing energy from ocean waves for propulsion. The extent of...following seas. Consequences of wave-energy absorption for energetics of...following seas. Consequences of wave-energy absorption for energetics of...

1990-01-01T23:59:59.000Z

364

WAVE-ENERGY DENSITY AND WAVE-MOMENTUM DENSITY OF EACH SPECIES OF A COLLISION-LESS PLASMA  

E-Print Network [OSTI]

case, the electrons have negative wave energy for 2w ne w wave energy for 2w . > w > 0 nlw/k to the negative wave energy of the electrons. positive

Cary, John R.

2012-01-01T23:59:59.000Z

365

Sandia National Laboratories: Sandia-NREL Wave Energy Converter...  

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

and Exhibition (EU PVSC) EC Top Publications Reference Model 5 (RM5): Oscillating Surge Wave Energy Converter Experimental Wave Tank Test for Reference Model 3 Floating- Point...

366

MHK Technologies/WAVE ENERGY CONVERTER | Open Energy Information  

Open Energy Info (EERE)

WAVE ENERGY CONVERTER < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Technology Resource Click here Wave Technology Type...

367

WEC up! Energy Department Announces Wave Energy Conversion Prize...  

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

WEC up Energy Department Announces Wave Energy Conversion Prize Administrator WEC up Energy Department Announces Wave Energy Conversion Prize Administrator September 24, 2014 -...

368

Mapping and Assessment of the United States Ocean Wave Energy...  

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

Mapping and Assessment of the United States Ocean Wave Energy Resource Mapping and Assessment of the United States Ocean Wave Energy Resource This report describes the analysis and...

369

Advancing Technology Readiness: Wave Energy Testing and Demonstration...  

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

Advancing Technology Readiness: Wave Energy Testing and Demonstration Advancing Technology Readiness: Wave Energy Testing and Demonstration March 6, 2014 - 1:23pm Addthis Northwest...

370

MHK Technologies/DEXA Wave Converter | Open Energy Information  

Open Energy Info (EERE)

Resource Click here Wave Technology Type Click here Attenuator Technology Description The wave energy conversion is similar to other devices There is no data publicly available...

371

Potential Impacts of Hydrokinetic and Wave Energy Conversion...  

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

Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on Aquatic Environments Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on...

372

MHK Technologies/Yongsoo Wave Power Plant | Open Energy Information  

Open Energy Info (EERE)

Yongsoo Wave Power Plant < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Yongsoo Wave Power Plant.jpg Technology Profile Technology Type Click...

373

Method of Focussing Waves by Inhomogeneous Oscillations of the...  

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

Method of Focussing Waves by Inhomogeneous Oscillations of the underlying Medium Disclosed is a nw method of refracting electromagnetic and other waves in a dispersive medium by...

374

Mapping and Assessment of the United States Ocean Wave Energy...  

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

wave has traveled seven wavelengths, while the wave group as a whole and its associated energy content have advanced only half that distance. ......

375

Oregon: Advancing Technology Readiness: Wave Energy Testing and...  

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

Oregon: Advancing Technology Readiness: Wave Energy Testing and Demonstration Oregon: Advancing Technology Readiness: Wave Energy Testing and Demonstration March 6, 2014 - 1:23pm...

376

Measuring Tiny Waves with High Power Particle Beams | Princeton...  

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

Measuring Tiny Waves with High Power Particle Beams American Fusion News Category: U.S. Universities Link: Measuring Tiny Waves with High Power Particle Beams...

377

Energy Transport by Classical Waves through Multilayers of Diffusing Slabs  

Science Journals Connector (OSTI)

We describe the effect of interfaces on classical wave propagation through diffusing layered media. A series resistor model for wave energy transport is introduced and we derive a...

Gerritsen, Sijmen; Bauer, Gerrit E

378

Performance of a Wave Energy Converter with Mechanical Energy Smoothing.  

E-Print Network [OSTI]

??A wave energy converter which uses a power balancing mechanism for turning intermittent and irregular wave motion input to smoothed continuous electrical power output is… (more)

Josefsson, Andreas; Berghuvud, Ansel; Ahlin, Kjell

2011-01-01T23:59:59.000Z

379

Mapping and Assessment of the United States Ocean Wave Energy...  

Open Energy Info (EERE)

Mapping and Assessment of the United States Ocean Wave Energy Resource This project estimates the naturally available and technically recoverable U.S. wave energy resources, using...

380

Wave-particle Interactions In Rotating Mirrors  

SciTech Connect (OSTI)

Wave-particle interactions in E×B rotating plasmas feature an unusual effect: particles are diffused by waves in both potential energy and kinetic energy. This wave-particle interaction generalizes the alpha channeling effect, in which radio frequency waves are used to remove alpha particles collisionlessly at low energy. In rotating plasmas, the alpha particles may be removed at low energy through the loss cone, and the energy lost may be transferred to the radial electric field. This eliminates the need for electrodes in the mirror throat, which have presented serious technical issues in past rotating plasma devices. A particularly simple way to achieve this effect is to use a high azimuthal mode number perturbation on the magnetic field. Rotation can also be sustained by waves in plasmas without a kinetic energy source. This type of wave has been considered for plasma centrifuges used for isotope separation. Energy may also be transferred from the electric field to particles or waves, which may be useful for ion heating and energy generation.

Abraham J. Fetterman and Nathaniel J. Fisch

2011-01-11T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Degenerate weakly nonlinear elastic plane waves  

E-Print Network [OSTI]

Weakly nonlinear plane waves are considered in hyperelastic crystals. Evolution equations are derived at a quadratically nonlinear level for the amplitudes of quasi-longitudinal and quasi-transverse waves propagating in arbitrary anisotropic media. The form of the equations obtained depends upon the direction of propagation relative to the crystal axes. A single equation is found for all propagation directions for quasi-longitudinal waves, but a pair of coupled equations occurs for quasi-transverse waves propagating along directions of degeneracy, or acoustic axes. The coupled equations involve four material parameters but they simplify if the wave propagates along an axis of material symmetry. Thus, only two parameters arise for propagation along an axis of two-fold symmetry, and one for a three-fold axis. The transverse wave equations decouple if the axis is four-fold or higher. In the absence of a symmetry axis it is possible that the evolution equations of the quasi-transverse waves decouple if the third order elastic moduli satisfy a certain identity. The theoretical results are illustrated with explicit examples.

W?odzimierz Doma?ski; Andrew N. Norris

2008-12-18T23:59:59.000Z

382

Scattering of plane evanescent waves by buried cylinders: Modeling the coupling to guided waves and resonances  

Science Journals Connector (OSTI)

The coupling of sound to buried targets can be associated with acoustic evanescent waves when the sea bottom is smooth. To understand the excitation of guided waves on buried fluid cylinders and shells by acoustic evanescent waves and the associated target resonances the two?dimensional partial wave series for the scattering is found for normal incidence in an unbounded medium. The shell formulation uses the simplifications of thin?shell dynamics. The expansion of the incident wave becomes a double summation with products of modified and ordinary Bessel functions [P. L. Marston J. Acoust. Soc. Am. 111 2378 (2002)]. Unlike the case of an ordinary incident wave the counterpropagating partial waves of the same angular order have unequal magnitudes when the incident wave is evanescent. This is a consequence of the exponential dependence of the incident wave amplitude on depth. Some consequences of this imbalance of partial?wave amplitudes are given by modifying previous ray theory for the scattering [P. L. Marston and N. H. Sun J. Acoust. Soc. Am. 97 777–783 (1995)]. The exponential dependence of the scattering on the location of a scatterer was previously demonstrated in air [T. J. Matula and P. L. Marston J. Acoust. Soc. Am. 93 1192–1195 (1993)].

2003-01-01T23:59:59.000Z

383

Wave-particle interaction and Hamiltonian dynamics investigated in a traveling wave tube  

SciTech Connect (OSTI)

For wave-particle interaction studies, the one-dimensional (1-D) beam-plasma system can be advantageously replaced by a Traveling Wave Tube (TWT). This led us to a detailed experimental analysis of the self-consistent interaction between unstable waves and a small either cold or warm beam. More recently, a test electron beam has been used to observe its non-self-consistent interaction with externally excited wave(s). The velocity distribution function of the electron beam is investigated with a trochoidal energy analyzer that records the beam energy distribution at the output of the TWT. An arbitrary waveform generator is used to launch a prescribed spectrum of waves along the slow wave structure (a 4 m long helix) of the TWT. The nonlinear synchronization of particles by a single wave responsible for Landau damping is observed. The resonant velocity domain associated to a single wave is also observed, as well as the transition to large-scale chaos when the resonant domains of two waves and their secondary resonances overlap leading to a typical 'devil's staircase' behavior. A new strategy for the control of chaos is tested.

Doveil, Fabrice; Macor, Alessandro [Physique des Interactions Ioniques et Moleculaires, Unite 6633 CNRS-Universite de Provence, Equipe Turbulence Plasma, Case 321, Centre de Saint-Jerome, F-13397 Marseille cedex 20 (France)

2006-05-15T23:59:59.000Z

384

Protective, Modular Wave Power Generation System  

SciTech Connect (OSTI)

The concept of small wave energy conversion modules that can be built into large, scalable arrays, in the same vein as solar panels, has been developed. This innovation lends itself to an organic business and development model, and enables the use of large-run manufacturing technology to reduce system costs. The first prototype module has been built to full-scale, and tested in a laboratory wave channel. The device has been shown to generate electricity and dissipate wave energy. Improvements need to be made to the electrical generator and a demonstration of an array of modules should be made in natural conditions.

Vvedensky, Jane M.; Park, Robert Y.

2012-11-27T23:59:59.000Z

385

Counting energy packets in the electromagnetic wave  

E-Print Network [OSTI]

We discuss the concept of energy packets in respect to the energy transported by electromagnetic waves and we demonstrate that this physical quantity can be used in physical problems involving relativistic effects. This refined concept provides results compatible to those obtained by simpler definition of energy density when relativistic effects apply to the free electromagnetic waves. We found this concept further compatible to quantum theory perceptions and we show how it could be used to conciliate between different physical approaches including the classical electromagnetic wave theory, the special relativity and the quantum theories.

Stefan Popescu; Bernhard Rothenstein

2007-05-18T23:59:59.000Z

386

Plasma Wave Reflection in Slowly Varying Media  

Science Journals Connector (OSTI)

Two mathematical formalisms are presented to describe wave reflection in a slowly varying spatially inhomogeneous thermal plasma described by the Vlasov equation. It is found that the transmitted wave which is the Wentzel?Kramer?Brillouin solution and the reflected wave can be expressed in terms of the local dielectric properties of the medium. In a numerical example it is shown that the intrinsic thermal properties of the plasma can supply reflection mechanisms that compete with the reflection coefficient predicted when the plasma is described by fluid equations.

H. L. Berk; C. W. Horton; M. N. Rosenbluth; R. N. Sudan

1967-01-01T23:59:59.000Z

387

Electromagnetic Waves in the De Sitter Space  

E-Print Network [OSTI]

5-Dimensional wave equation for a massive particle of spin 1 in the background of de Sitter space-time model is solved in static coordinates. The spherical 5-dimensional vectors $A_{a}, a= 1,...,5$ of three types, $j,j+1, j-1$ are constructed. In massless case they give electromagnetic wave solutions, obeying the Lorentz condition. 5-form of equations in massless case is used to produce recipe to build electromagnetic wave solutions of the types $\\Pi, E,M$; the first is trivial and can be removed by a gauge ransformation. The recipe is specified to produce spherical $\\Pi, E, M$ solutions in static coordinates.

V. S. Otchik; V. M. Red'kov

2010-01-24T23:59:59.000Z

388

AdS pp-waves  

E-Print Network [OSTI]

We obtain the pp-waves of D=5 and D=4 gauged supergravities supported by $U(1)^3$ and $U(1)^4$ gauge field strengths respectively. We show that generically these solutions preserve 1/4 of the supersymmetry, but supernumerary supersymmetry can arise for appropriately constrained harmonic functions associated with the pp-waves. In particular it implies that the solutions are independent of the light-cone coordinate $x^+$. We also obtain the pp-waves in the Freedman-Schwarz model.

Johannes Kerimo

2005-09-07T23:59:59.000Z

389

Computational Modelling of Nonlinear Calcium Waves  

E-Print Network [OSTI]

The calcium transport in biological systems is modelled as a reaction-diffusion process. Nonlinear calcium waves are then simulated using a stochastic cellular automaton whose rules are derived from the corresponding coupled partial differential equations. Numerical simulations show self-organized criticality in the complex calcium waves and patterns. Both the stochastic cellular automaton approach and the equation-based simulations can predict the characteristics of calcium waves and complex pattern formation. The implication of locality of calcium distribution with positional information in biological systems is also discussed.

Xin-She Yang

2010-03-28T23:59:59.000Z

390

Electromagnetic waves, gravitational coupling and duality analysis  

E-Print Network [OSTI]

In this letter we introduce a particular solution for parallel electric and magnetic fields, in a gravitational background, which satisfy free-wave equations and the phenomenology suggested by astrophysical plasma physics. These free-wave equations are computed such that the electric field does not induce the magnetic field and vice-versa. In a gravitational field, we analyze the Maxwell equations and the corresponding electromagnetic waves. A continuity equation is presented. A commutative and noncommutative analysis of the electromagnetic duality is described.

E. M. C. Abreu; C. Pinheiro; S. A. Diniz; F. C. Khanna

2005-10-27T23:59:59.000Z

391

Spatial wave functions of photon and electron  

SciTech Connect (OSTI)

The quantum mechanical model of the photon and electron is considered. The photon is conceived of as a particle moving with the speed of light which is accompanied by the wave function of the photon spreading out with an infinite speed. The wave function of the electron is introduced in terms of virtual photons tied to the electron. A description of electrostatic and magnetostatic interactions is given through the wave functions of electrons. The approach provides an explanation of the results of recent experiments measuring the speed of propagation of the bound magnetic field.

Khokhlov, D. L. [Sumy State University, R.-Korsakov St. 2, Sumy 40007 (Ukraine)

2010-12-01T23:59:59.000Z

392

DeFrees Small Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Wave Basin Wave Basin Jump to: navigation, search Basic Specifications Facility Name DeFrees Small Wave Basin Overseeing Organization Cornell University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 15.0 Beam(m) 0.8 Depth(m) 0.9 Water Type Freshwater Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 30 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Computer controlled hydraulic paddle, arbitrary wave shape possible Wave Direction Uni-Directional Simulated Beach Yes Description of Beach 1:10 sloping glass with dissipative horsehair covering if needed

393

CX-001419: Categorical Exclusion Determination | Department of...  

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

Exclusion Determination CX-001419: Categorical Exclusion Determination Direct Drive Wave Energy Buoy CX(s) Applied: B3.6, A9 Date: 03232010 Location(s): Oregon Office(s):...

394

The Centre for Power Transmission  

E-Print Network [OSTI]

circuit in which linear actuators act as pump, and a hydraulic motor drives an electric generator buoy and waves, and load characteristics of generators connected to an electrical grid must

Burton, Geoffrey R.

395

AUGUST 2001 1411W A S H B U R N E T A L . 2001 American Meteorological Society  

E-Print Network [OSTI]

buoy, is suitable for deployment from small boats under conditions of light wind and small waves Santa Barbara, California, where natural hydro- carbon seepage produces extensive, dense bubble plumes

Washburn, Libe

396

How and why to think about scattering in terms of wave packets instead of plane waves  

E-Print Network [OSTI]

We discuss "the plane wave approximation" to quantum mechanical scattering using simple one-dimensional examples. The central points of the paper are that (a) plane waves should be thought of as infinitely wide wave packets, and (b) the calculations of reflection and transmission probabilities $R$ and $T$ in standard textbook presentations involve an approximation which is almost never discussed. We argue that it should be discussed explicitly, and that doing so provides a simple and intuitively revealing alternative way to derive and understand certain formulas. Using an under-appreciated exact expression for wave packet scattering probabilities, we calculate, for two standard examples, expressions for $R$ and $T$ for an incident Gaussian wave packet. Comparing these results to the corresponding ones calculated using the plane wave approximation helps illuminate the domain of applicability of that approximation.

Travis Norsen; Joshua Lande; S. B. McKagan

2009-04-18T23:59:59.000Z

397

Wave-particle duality and `bipartite' wave functions for a single particle  

E-Print Network [OSTI]

It is shown that `bipartite' wave functions can present a mathematical formalism of quantum theory for a single particle, in which the associated Schr\\"{o}dinger's wave functions correspond to those `bipartite' wave functions of product forms. This extension of Schr\\"{o}dinger's form establishes a mathematical expression of wave-particle duality and that von Neumann's entropy is a quantitative measure of complementarity between wave-like and particle-like behaviors. In particular, this formalism suggests that collapses of Schr\\"{o}dinger's wave functions can be regarded as the simultaneous transition of the particle from many levels to one. Our results shed considerable light on the basis of quantum mechanics, including quantum measurement.

Zeqian Chen

2006-09-12T23:59:59.000Z

398

wave power density | OpenEI  

Open Energy Info (EERE)

power density power density Dataset Summary Description This project estimates the naturally available and technically recoverable U.S. wave energy resources, using a 51-month Wavewatch III hindcast database developed especially for this study by National Oceanographic and Atmospheric Administration's (NOAA's) National Centers for Environmental Prediction. For total resource estimation, wave power density in terms of kilowatts per meter is aggregated across a unit diameter circle. Source Electric Power Research Institute (EPRI) Date Released December 05th, 2011 (2 years ago) Date Updated Unknown Keywords EPRI MHK NREL ocean Virginia Tech wave wave power density Data application/pdf icon Download Full Report (pdf, 8.8 MiB) Quality Metrics Level of Review Some Review Comment

399

WaveCatcher Inc | Open Energy Information  

Open Energy Info (EERE)

WaveCatcher Inc WaveCatcher Inc Jump to: navigation, search Name WaveCatcher Inc Address 2307 Robincrest Ln Sector Marine and Hydrokinetic Year founded 2006 Phone number 1-847-764-9106 LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=WaveCatcher_Inc&oldid=678511" Categories: Clean Energy Organizations Companies Organizations Stubs MHK Companies What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 1863326429 Varnish cache server

400

Sources of Gravitational Waves: Theory and Observations  

E-Print Network [OSTI]

Gravitational-wave astronomy will soon become a new tool for observing the Universe. Detecting and interpreting gravitational waves will require deep theoretical insights into astronomical sources. The past three decades have seen remarkable progress in analytical and numerical computations of the source dynamics, development of search algorithms and analysis of data from detectors with unprecedented sensitivity. This Chapter is devoted to examine the advances and future challenges in understanding the dynamics of binary and isolated compact-object systems, expected cosmological sources, their amplitudes and rates, and highlights of results from gravitational-wave observations. All of this is a testament to the readiness of the community to open a new window for observing the cosmos, a century after gravitational waves were first predicted by Albert Einstein.

Buonanno, Alessandra

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

New Perspectives on Wave Energy Converter Control   

E-Print Network [OSTI]

This work examines some of the fundamental problems behind the control of wave energy converters (WECs). Several new perspectives are presented to aid the understanding of the problem and the interpretation of the ...

Price, Alexandra A E

2009-01-01T23:59:59.000Z

402

First Plasma Wave Observations at Neptune  

Science Journals Connector (OSTI)

...revealed that Neptune has a large and complex magnetosphere...first observations of plasma waves and low-frequency...from lightning. Such large dispersions would require path lengths and plasma densities that are much larger than anything plausible...

D. A. Gurnett; W. S. Kurth; R. L. Poynter; L. J. Granroth; I. H. Cairns; W. M. Macek; S. L. Moses; F. V. Coroniti; C. F. Kennel; D. D. Barbosa

1989-12-15T23:59:59.000Z

403

Grading of lumber using stress waves  

E-Print Network [OSTI]

The goal of this research was to develop stress wave grading technology suitable for small lumber mills. Specific goals include: 1) develop an ultrasonic probe configuration to facilitate real-time grain angle and edge knot measurement, 2) determine...

Bethi, Rajeshwar

2012-06-07T23:59:59.000Z

404

Stable operating regime for traveling wave devices  

DOE Patents [OSTI]

Autophase stability is provided for a traveling wave device (TWD) electron beam for amplifying an RF electromagnetic wave in walls defining a waveguide for said electromagnetic wave. An off-axis electron beam is generated at a selected energy and has an energy noise inherently arising from electron gun. The off-axis electron beam is introduced into the waveguide. The off-axis electron beam is introduced into the waveguide at a second radius. The waveguide structure is designed to obtain a selected detuning of the electron beam. The off-axis electron beam has a velocity and the second radius to place the electron beam at a selected distance from the walls defining the waveguide, wherein changes in a density of the electron beam due to the RF electromagnetic wave are independent of the energy of the electron beam to provide a concomitant stable operating regime relative to the energy noise.

Carlsten, Bruce E. (Los Alamos, NM)

2000-01-01T23:59:59.000Z

405

Wave Packets and Turbulent Peter Jordan1  

E-Print Network [OSTI]

Wave Packets and Turbulent Jet Noise Peter Jordan1 and Tim Colonius2 1 D´epartement Fluides, California 91125; email: peter.jordan@univ-poitiers.fr, colonius@caltech.edu Annu. Rev. Fluid Mech. 2013. 45

Dabiri, John O.

406

Alfvénic waves and alignment of large grains  

Science Journals Connector (OSTI)

The alignment of grains under the influence of the Alfvenic waves is discussed. It is shown that even small deviations from grain uniformity result in the alignment of large (l > 6?10?5 cm) grains. The latter res...

A. Lazarian

1994-06-01T23:59:59.000Z

407

Searching for gravitational waves from binary coalescence  

E-Print Network [OSTI]

We describe the implementation of a search for gravitational waves from compact binary coalescences in LIGO and Virgo data. This all-sky, all-time, multidetector search for binary coalescence has been used to search data ...

Vaulin, Ruslan

408

Lattice Boltzmann model for wave propagation  

Science Journals Connector (OSTI)

A lattice Boltzmann model for two-dimensional wave equation is proposed by using the higher-order moment method. The higher-order moment method is based on the solution of a series of partial differential equations obtained by using multiscale technique and Chapman-Enskog expansion. In order to obtain the lattice Boltzmann model for the wave equation with higher-order accuracy of truncation errors, we removed the second-order dissipation term and the third-order dispersion term by employing the moments up to fourth order. The reversibility in time appears owing to the absence of the second-order dissipation term and the third-order dispersion term. As numerical examples, some classical examples, such as interference, diffraction, and wave passing through a convex lens, are simulated. The numerical results show that this model can be used to simulate wave propagation.

Jianying Zhang; Guangwu Yan; Xiubo Shi

2009-08-27T23:59:59.000Z

409

Precipitation Banding in Idealized Baroclinic Waves  

Science Journals Connector (OSTI)

Moist idealized baroclinic-wave simulations show the development of precipitation bands from a zonally uniform initial midlatitude jet. For a frictionless lower boundary, and with no latent-heat release or surface heat and moisture fluxes, warm ...

Jesse Norris; Geraint Vaughan; David M. Schultz

2014-09-01T23:59:59.000Z

410

12th Annual Wave & Tidal 2015  

Broader source: Energy.gov [DOE]

The UK is currently the undisputed global leader in marine energy, with more wave and tidal stream devices installed than the rest of the world combined. This leading position is built on an...

411

Leancon Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Real Sea Test This company is involved in the following MHK Technologies: Multi Absorbing Wave Energy Converter MAWEC This article is a stub. You can help OpenEI by expanding it....

412

Wave Energy Technologies Inc | Open Energy Information  

Open Energy Info (EERE)

WET EnGen This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleWaveEnergyTechnologiesInc&oldid769141...

413

Wave Power Plant Inc | Open Energy Information  

Open Energy Info (EERE)

Powered Compressed Air Stations This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleWavePowerPlantInc&oldid76915...

414

Power recycling for an interferometric gravitational wave  

E-Print Network [OSTI]

THESIS Power recycling for an interferometric gravitational wave detector Masaki Ando Department . . . . . . . . . . . . . . 48 3.3 Power recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 3.3.1 Principle of power recycling . . . . . . . . . . . . . . . . . 50 3.3.2 Recycling cavity

Ejiri, Shinji

415

Optics in a nonlinear gravitational wave  

E-Print Network [OSTI]

Gravitational waves can act like gravitational lenses, affecting the observed positions, brightnesses, and redshifts of distant objects. Exact expressions for such effects are derived here, allowing for arbitrarily-moving sources and observers in the presence of plane-symmetric gravitational waves. The commonly-used predictions of linear perturbation theory are shown to be generically overshadowed---even for very weak gravitational waves---by nonlinear effects when considering observations of sufficiently distant sources; higher-order perturbative corrections involve secularly-growing terms which cannot necessarily be neglected. Even on more moderate scales where linear effects remain at least marginally dominant, nonlinear corrections are qualitatively different from their linear counterparts. There is a sense in which they can, for example, mimic the existence of a third type of gravitational wave polarization.

Harte, Abraham I

2015-01-01T23:59:59.000Z

416

Apparatus and method for generating mechanical waves  

DOE Patents [OSTI]

Mechanical waves are generated in a medium by subjecting an electromechanical element to an alternating electric field having a frequency which induces mechanical resonance therein and is below any electrical resonance frequency thereof.

Allensworth, Dwight L. (Albuquerque, NM); Chen, Peter J. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

417

Gravitational Waves in Ghost Free Bimetric Gravity  

E-Print Network [OSTI]

We obtain a set of exact gravitational wave solutions for the ghost free bimetric theory of gravity. With a flat reference metric, the theory admits the vacuum Brinkmann plane wave solution for suitable choices of the coefficients of different terms in the interaction potential. An exact gravitational wave solution corresponding to a massive scalar mode is also admitted for arbitrary choice of the coefficients with the reference metric being proportional to the spacetime metric. The proportionality factor and the speed of the wave are calculated in terms of the parameters of the theory. We also show that a F(R) extension of the theory admits similar solutions but in general is plagued with ghost instabilities.

Morteza Mohseni

2012-11-15T23:59:59.000Z

418

On blowup in supercritical wave equations  

E-Print Network [OSTI]

We study the blowup behaviour for the focusing energy-supercritical semilinear wave equation in 3 space dimensions without symmetry assumptions on the data. We prove the stability of the ODE blowup profile.

Roland Donninger; Birgit Schörkhuber

2014-11-28T23:59:59.000Z

419

Wave Energy AS | Open Energy Information  

Open Energy Info (EERE)

Wave Energy AS Address: Opstadveien 11C Place: Aalgaard Zip: 4330 Region: Norway Sector: Marine and Hydrokinetic Phone Number: (+47) 51 6109 30 Website: http:www.waveenergy.no...

420

Sources of Gravitational Waves: Theory and Observations  

E-Print Network [OSTI]

Gravitational-wave astronomy will soon become a new tool for observing the Universe. Detecting and interpreting gravitational waves will require deep theoretical insights into astronomical sources. The past three decades have seen remarkable progress in analytical and numerical computations of the source dynamics, development of search algorithms and analysis of data from detectors with unprecedented sensitivity. This Chapter is devoted to examine the advances and future challenges in understanding the dynamics of binary and isolated compact-object systems, expected cosmological sources, their amplitudes and rates, and highlights of results from gravitational-wave observations. All of this is a testament to the readiness of the community to open a new window for observing the cosmos, a century after gravitational waves were first predicted by Albert Einstein.

Alessandra Buonanno; B. S. Sathyaprakash

2014-10-28T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Guidelines in Wave Energy Conversion System Design  

E-Print Network [OSTI]

This paper presents an investigational study on wave energy converters (WECs). The types of WEC available from the market are studied first. The design considerations for implementing a WEC in the Gulf of Mexico (GOM) are then evaluated...

Guiberteau, K. L.; Liu, Y.; Lee, J.; Kozman, T.

2014-01-01T23:59:59.000Z

422

Reflectors in wave equation imaging Frank Natterer  

E-Print Network [OSTI]

that the propagation obeys the wave equation 2 u t2 = c2 (u + q(t)(x - s)) (1.1) Here, c = c(x), x IRn is the local

Münster, Westfälische Wilhelms-Universität

423

Energy Transport by Nonlinear Internal Waves  

Science Journals Connector (OSTI)

Winter stratification on Oregon’s continental shelf often produces a near-bottom layer of dense fluid that acts as an internal waveguide upon which nonlinear internal waves propagate. Shipboard profiling and bottom lander observations capture ...

J. N. Moum; J. M. Klymak; J. D. Nash; A. Perlin; W. D. Smyth

2007-07-01T23:59:59.000Z

424

Nonlinear Characteristics of Wave Propagation over Vegetation  

E-Print Network [OSTI]

The attenuation of wave energy by submerged or near-emergent coastal vegetation is one of the prominent methods of energy dissipation in areas with significant presence of wetlands. In this thesis, the nature of this dissipation in nearshore random...

Venkattaramanan, Aravinda

2014-04-28T23:59:59.000Z

425

Deepwater Internal Wave Study and Application  

E-Print Network [OSTI]

and ocean currents. Although their effects on floating drilling platforms and their riser systems have not been extensively studied, in the past these waves have seriously disrupted offshore exploration and drilling operations. In particular, a drill pipe...

Jiang, Lei

2013-12-10T23:59:59.000Z

426

Gravity waves from vortex dipoles and jets  

E-Print Network [OSTI]

The dissertation first investigates gravity wave generation and propagation from jets within idealized vortex dipoles using a nonhydrostatic mesoscale model. Several initially balanced and localized jets induced by vortex dipoles are examined here...

Wang, Shuguang

2009-05-15T23:59:59.000Z

427

Spatial solitary-wave optical memory  

Science Journals Connector (OSTI)

We consider some features of spatial solitary-wave switching in a unidirectional ring cavity that is partially filled with a fast and saturably self-focusing nonlinear medium. Large...

McDonald, G S; Firth, W J

1990-01-01T23:59:59.000Z

428

Resolving a gravitational wave memory paradox  

E-Print Network [OSTI]

Two different approaches to gravitational perturbation theory appear to give two different answers for the properties of gravitational wave memory. We show that this contradiction is only apparent and the two approaches actually agree.

David Garfinkle; Istvan Racz

2014-06-20T23:59:59.000Z

429

Direct Simulation of Internal Wave Energy Transfer  

Science Journals Connector (OSTI)

A three-dimensional nonhydrostatic numerical model is used to calculate nonlinear energy transfers within decaying Garrett–Munk internal wavefields. Inviscid wave interactions are calculated over horizontal scales from about 1 to 80 km and for ...

Kraig B. Winters; Eric A. D’Asaro

1997-09-01T23:59:59.000Z

430

Energy Dispersion in African Easterly Waves  

Science Journals Connector (OSTI)

The existence of an upstream (eastward) group velocity for African easterly waves (AEWs) is shown based on single-point lag regressions using gridded reanalysis data from 1990 to 2010. The eastward energy dispersion is consistent with the ...

Michael Diaz; Anantha Aiyyer

2013-01-01T23:59:59.000Z

431

Continuous-wave, pair-pumped laser  

SciTech Connect (OSTI)

We report room-temperature operation of what we believe is the first continuous-wave laser that relies exclusively on cooperative upconversion by coupled ion pairs to achieve population inversion.

Xie, P.; Rand, S.C. (Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, MI (USA))

1990-08-01T23:59:59.000Z

432

Nonlinear extraordinary wave in dense plasma  

SciTech Connect (OSTI)

Conditions for the propagation of a slow extraordinary wave in dense magnetized plasma are found. A solution to the set of relativistic hydrodynamic equations and Maxwell’s equations under the plasma resonance conditions, when the phase velocity of the nonlinear wave is equal to the speed of light, is obtained. The deviation of the wave frequency from the resonance frequency is accompanied by nonlinear longitudinal-transverse oscillations. It is shown that, in this case, the solution to the set of self-consistent equations obtained by averaging the initial equations over the period of high-frequency oscillations has the form of an envelope soliton. The possibility of excitation of a nonlinear wave in plasma by an external electromagnetic pulse is confirmed by numerical simulations.

Krasovitskiy, V. B., E-mail: krasovit@mail.ru [Russian Academy of Sciences, Keldysh Institute of Applied Mathematics (Russian Federation); Turikov, V. A. [Russian University of Peoples’ Friendship (Russian Federation)] [Russian University of Peoples’ Friendship (Russian Federation)

2013-10-15T23:59:59.000Z

433

Testing Modified Gravity with Gravitational Wave Astronomy  

E-Print Network [OSTI]

The emergent area of gravitational wave astronomy promises to provide revolutionary discoveries in the areas of astrophysics, cosmology, and fundamental physics. One of the most exciting possibilities is to use gravitational-wave observations to test alternative theories of gravity. In this contribution we describe how to use observations of extreme-mass-ratio inspirals by the future Laser Interferometer Space Antenna to test a particular class of theories: Chern-Simons modified gravity.

Carlos F. Sopuerta; Nicolas Yunes

2010-10-01T23:59:59.000Z

434

Vibrational Superposition States Without Rotating Wave Approximation  

E-Print Network [OSTI]

We propose a scheme to generate superpositions of coherent states for the vibrational motion of a laser cooled trapped-ion. It is based on the interaction with a standing wave making use of the counter-rotating terms, i.e. not applying the rotating wave approximation. We also show that the same scheme can be exploited for quantum state measurement, i.e. with the same scheme non-classical states may be reconstructed

Mancini, S; Tombesi, P

2000-01-01T23:59:59.000Z

435

Parametric internal waves in a compressible fluid  

E-Print Network [OSTI]

We describe the effect of vibration on a confined volume of fluid which is density stratified due to its compressibility. We show that internal gravity-acoustic waves can be parametrically destabilized by the vibration. The resulting instability is similar to the classic Faraday instability of surface waves, albeit modified by the compressible nature of the fluid. It may be possible to observe experimentally near a gas-liquid critical point.

Kausik S. Das; Stephen W. Morris; A. Bhattacharyay

2007-10-11T23:59:59.000Z

436

Parametric internal waves in a compressible fluid  

E-Print Network [OSTI]

We describe the effect of vibration on a confined volume of fluid which is density stratified due to its compressibility. We show that internal gravity-acoustic waves can be parametrically destabilized by the vibration. The resulting instability is similar to the classic Faraday instability of surface waves, albeit modified by the compressible nature of the fluid. It may be possible to observe experimentally near a gas-liquid critical point.

Das, Kausik S; Bhattacharyay, A

2007-01-01T23:59:59.000Z

437

Resonant speed meter for gravitational wave detection  

E-Print Network [OSTI]

Gravitational-wave detectors have been well developed and operated with high sensitivity. However, they still suffer from mirror displacement noise. In this paper, we propose a resonant speed meter, as a displacement noise-canceled configuration based on a ring-shaped synchronous recycling interferometer. The remarkable feature of this interferometer is that, at certain frequencies, gravitational-wave signals are amplified, while displacement noises are not.

Atsushi Nishizawa; Seiji Kawamura; Masa-aki Sakagami

2008-05-01T23:59:59.000Z

438

Alfven wave. DOE Critical Review Series  

SciTech Connect (OSTI)

This monograph deals with the properties of Alfven waves and with their application to fusion. The book is divided into 7 chapters dealing with linear properties in homogeneous and inhomogeneous plasmas. Absorption is treated by means of kinetic theory. Instabilities and nonlinear processes are treated in Chapters 1 to 6, and the closing chapter is devoted to theory and experiments in plasma heating by Alfven waves. (MOW)

Hasegawa, A.; Uberoi, C.

1982-01-01T23:59:59.000Z

439

Nonlinear physics of shear Alfvén waves  

SciTech Connect (OSTI)

Shear Alfvén waves (SAW) play fundamental roles in thermonuclear plasmas of fusion interest, since they are readily excited by energetic particles in the MeV range as well as by the thermal plasma components. Thus, understanding fluctuation induced transport in burning plasmas requires understanding nonlinear SAW physics. There exist two possible routes to nonlinear SAW physics: (i) wave-wave interactions and the resultant spectral energy transfer; (ii) nonlinear wave-particle interactions of SAW instabilities with energetic particles. Within the first route, it is advantageous to understand and describe nonlinear processes in term of proximity of the system to the Alfvénic state, where wave-wave interactions are minimized due to the cancellation of Reynolds and Maxwell stresses. Here, various wave-wave nonlinear dynamics are elucidated in terms of how they break the Alfvénic state. In particular, we discuss the qualitative and quantitative modification of the SAW parametric decay process due to finite ion compressibility and finite ion Larmor radius. We also show that toroidal geometry plays a crucial role in the nonlinear excitation of zonal structures by Alfvén eigenmodes. Within the second route, the coherent nonlinear dynamics of structures in the energetic particle phase space, by which secular resonant particle transport can occur on meso- and macro-scales, must be addressed and understood. These 'nonlinear equilibria' or 'phase-space zonal structures' dynamically evolve on characteristic (fluctuation induced) turbulent transport time scales, which are generally of the same order of the nonlinear time scale of the underlying fluctuations. In this work, we introduce the general structure of nonlinear Schrödinger equations with complex integro-differential nonlinear terms, which govern these physical processes. To elucidate all these aspects, theoretical analyses are presented together with numerical simulation results.

Zonca, Fulvio [Associazione EURATOM-ENEA sulla Fusione, C.P. 65-00044 Frascati, Italy and Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 31007 (China); Chen, Liu [Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 31007, P.R.C. and Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)

2014-02-12T23:59:59.000Z

440

Gravitational wave experiments and Baksan project "OGRAN"  

E-Print Network [OSTI]

A brief sketch of the present status of gravitational wave experiments is given. Attention is concentrated to recent observations with the gravitational detector network. The project OGRAN for a combined optic-interferometrical and acoustical gravitation wave antenna planned for installation into underground facilities of the Baksan Neutrino Observatory is presented. We describe general principles of the apparatus, expected sensitivity and current characteristics of the antenna prototype; some ways for sensitivity improvement are also discussed.

L. Bezrukov; S. Popov; V. Rudenko; A. Serdobolskii; M. Skvortsov

2004-11-16T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hk" 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

Subsonic Free Surface Waves in Linear Elasticity  

E-Print Network [OSTI]

For general anisotropic linear elastic solids with smooth boundaries, Rayleigh-type surface waves are studied. Using spectral factorizations of matrix polynomials, a self-contained exposition of the case of a homogeneous half-space is given first. The main result is about inhomogeneous anisotropic bodies with curved surfaces. The existence of subsonic free surface waves is shown by giving ray series asymptotic expansions, including formulas for the transport equation.

Sönke Hansen

2014-05-09T23:59:59.000Z

442

A Universality in PP-Waves  

E-Print Network [OSTI]

We discuss a universality property of any covariant field theory in space-time expanded around pp-wave backgrounds. According to this property the space-time lagrangian density evaluated on a restricted set of field configurations, called universal sector, turns out to be same around all the pp-waves, even off-shell, with same transverse space and same profiles for the background scalars. In this paper we restrict our discussion to tensorial fields only. In the context of bosonic string theory we consider on-shell pp-waves and argue that universality requires the existence of a universal sector of world-sheet operators whose correlation functions are insensitive to the pp-wave nature of the metric and the background gauge flux. Such results can also be reproduced using the world-sheet conformal field theory. We also study such pp-waves in non-polynomial closed string field theory (CSFT). In particular, we argue that for an off-shell pp-wave ansatz with flat transverse space and dilaton independent of transverse coordinates the field redefinition relating the low energy effective field theory and CSFT with all the massive modes integrated out is at most quadratic in fields. Because of this simplification it is expected that the off-shell pp-waves can be identified on the two sides. Furthermore, given the massless pp-wave field configurations, an iterative method for computing the higher massive modes using the CSFT equations of motion has been discussed. All our bosonic string theory analyses can be generalised to the common Neveu-Schwarz sector of superstrings.

Partha Mukhopadhyay

2007-04-09T23:59:59.000Z

443

Comparison of P-wave and S-wave data in a fractured reservoir  

E-Print Network [OSTI]

-wave and S-wave stations . Table 2 The depths, times, and RMS velocities of the seismic reflectors (Tertiary and Cretaceous systems) at locations 45, 0 and 65. 0 on the P-wave section . 32 Table 3 The RMS velocities, depths of the seismic reflectors...-wave seismic lines were shot, parallel to each other, in Burleson County, Texas. The circles indicate ~ oil-producing wells. The two lines trend northwest-southeast and are appmximately thee and a half miles long (Fig. 2) The contours represent cumulative...

Al-Mustafa, Husam Mustafa

2012-06-07T23:59:59.000Z

444

Electron scattering and nonlinear trapping by oblique whistler waves: The critical wave intensity for nonlinear effects  

SciTech Connect (OSTI)

In this paper, we consider high-energy electron scattering and nonlinear trapping by oblique whistler waves via the Landau resonance. We use recent spacecraft observations in the radiation belts to construct the whistler wave model. The main purpose of the paper is to provide an estimate of the critical wave amplitude for which the nonlinear wave-particle resonant interaction becomes more important than particle scattering. To this aim, we derive an analytical expression describing the particle scattering by large amplitude whistler waves and compare the corresponding effect with the nonlinear particle acceleration due to trapping. The latter is much more rare but the corresponding change of energy is substantially larger than energy jumps due to scattering. We show that for reasonable wave amplitudes ?10–100?mV/m of strong whistlers, the nonlinear effects are more important than the linear and nonlinear scattering for electrons with energies ?10–50?keV. We test the dependencies of the critical wave amplitude on system parameters (background plasma density, wave frequency, etc.). We discuss the role of obtained results for the theoretical description of the nonlinear wave amplification in radiation belts.

Artemyev, A. V., E-mail: ante0226@gmail.com; Vasiliev, A. A. [Space Research Institute, RAS, Moscow (Russian Federation); Mourenas, D.; Krasnoselskikh, V. V. [LPC2E/CNRS—University of Orleans, Orleans (France); Agapitov, O. V. [Space Sciences Laboratory, University of California, Berkeley, California 94720 (United States)

2014-10-15T23:59:59.000Z

445

Dispersion equation for water waves with vorticity and Stokes waves on flows with counter-currents  

E-Print Network [OSTI]

The two-dimensional free-boundary problem of steady periodic waves with vorticity is considered for water of finite depth. We investigate how flows with small-amplitude Stokes waves on the free surface bifurcate from a horizontal parallel shear flow in which counter-currents may be present. Two bifurcation mechanisms are described: for waves with fixed Bernoulli's constant and fixed wavelength. In both cases the corresponding dispersion equations serve for defining wavelengths from which Stokes waves bifurcate. Sufficient conditions guaranteeing the existence of roots of these equations are obtained. Two particular vorticity distributions are considered in order to illustrate general results.

Vladimir Kozlov; Nikolay Kuznetsov

2014-06-05T23:59:59.000Z

446

Interactions of solitary waves with cylinder arrays  

SciTech Connect (OSTI)

This paper addresses a numerical investigation of solitary waves interactions with an array of multiple surface-piercing vertical cylinders and the corresponding nonlinear hydrodynamic loads on each individual cylinder. The theoretical model adopted for simulation is the generalized Boussinesq two-equation model. The boundary-fitted coordinate transformation and multiple-grid technique are utilized here to simplify the computational domain and to facilitate the applications of the boundary conditions on the cylinder surfaces. The scattered wave field and the hydrodynamic forces on each cylinder during wave impact are numerically evaluated. Study of sheltering effect by the neighboring structures on wave loads is conducted. It is found that the presence of the neighboring cylinders has shown significantly influence on the wave loads and the scattering of the primary incident waves. For a tandem two cylinders, the shielding effect plays an important role to reduce the force acting on the rear cylinder. For transversely arranged two cylinders, the in-line force distribution is mostly independent of the gap distance between cylinders. However, the transverse force coefficient increases as the separation distance decreases.

Wang, K.H.; Jiang, L. [Univ. of Houston, TX (United States). Dept. of Civil and Environmental Engineering

1994-12-31T23:59:59.000Z

447

A thermoacoustic traveling wave linear amplifier  

Science Journals Connector (OSTI)

This paper describes an experiment to show linear amplification of traveling sound waves in a duct using a thermoacoustic regenerator. As noted by Ceperley [J. Acoust. Soc. Am. 66 1508–1513 (1979)] a Stirling engine?type regenerator should act as an acoustic gain medium for traveling waves in a duct. This principle is used in thermoacoustic traveling wave engines to transfer power from heat reservoirs to acoustic energy. However it is difficult to produce finite gain for pure traveling wave impedance since viscous losses in the channels of the regenerator overcome the gain and previous workers have only been able to show reduced loss in such a system. Optimizing the regenerator design with numerical modeling and using a greater temperature difference suggest that a traveling wave thermal amplifier can produce 2 dB of real gain over two octaves for traveling waves in air. Such a device would amplify a broadband acoustic signal without electrical transducers. Design of the amplifier and experimental results will be shown.

Robert A. Hiller

2000-01-01T23:59:59.000Z

448

Nonlinear Lattice Waves in Random Potentials  

E-Print Network [OSTI]

Localization of waves by disorder is a fundamental physical problem encompassing a diverse spectrum of theoretical, experimental and numerical studies in the context of metal-insulator transition, quantum Hall effect, light propagation in photonic crystals, and dynamics of ultra-cold atoms in optical arrays. Large intensity light can induce nonlinear response, ultracold atomic gases can be tuned into an interacting regime, which leads again to nonlinear wave equations on a mean field level. The interplay between disorder and nonlinearity, their localizing and delocalizing effects is currently an intriguing and challenging issue in the field. We will discuss recent advances in the dynamics of nonlinear lattice waves in random potentials. In the absence of nonlinear terms in the wave equations, Anderson localization is leading to a halt of wave packet spreading. Nonlinearity couples localized eigenstates and, potentially, enables spreading and destruction of Anderson localization due to nonintegrability, chaos and decoherence. The spreading process is characterized by universal subdiffusive laws due to nonlinear diffusion. We review extensive computational studies for one- and two-dimensional systems with tunable nonlinearity power. We also briefly discuss extensions to other cases where the linear wave equation features localization: Aubry-Andre localization with quasiperiodic potentials, Wannier-Stark localization with dc fields, and dynamical localization in momentum space with kicked rotors.

Sergej Flach

2014-09-10T23:59:59.000Z

449

Mechanical Surface Waves Accompany Action Potential Propagation  

E-Print Network [OSTI]

Many studies have shown that a mechanical displacement of the axonal membrane accompanies the electrical pulse defining the Action Potential (AP). Despite a large and diverse body of experimental evidence, there is no theoretical consensus either for the physical basis of this mechanical wave nor its interdependence with the electrical signal. In this manuscript we present a model for these mechanical displacements as arising from the driving of surface wave modes in which potential energy is stored in elastic properties of the neuronal membrane and cytoskeleton while kinetic energy is carried by the axoplasmic fluid. In our model these surface waves are driven by the traveling wave of electrical depolarization that characterizes the AP, altering the compressive electrostatic forces across the membrane as it passes. This driving leads to co-propagating mechanical displacements, which we term Action Waves (AWs). Our model for these AWs allows us to predict, in terms of elastic constants, axon radius and axoplasmic density and viscosity, the shape of the AW that should accompany any traveling wave of voltage, including the AP predicted by the Hodgkin and Huxley (HH) equations. We show that our model makes predictions that are in agreement with results in experimental systems including the garfish olfactory nerve and the squid giant axon. We expect our model to serve as a framework for understanding the physical origins and possible functional roles of these AWs in neurobiology.

Ahmed El Hady; Benjamin B. Machta

2014-07-28T23:59:59.000Z

450

FUNWAVE-TVD FULLY NONLINEAR BOUSSINESQ WAVE MODEL  

E-Print Network [OSTI]

FUNWAVE-TVD FULLY NONLINEAR BOUSSINESQ WAVE MODEL WITH TVD SOLVER DOCUMENTATION AND USER'S MANUAL a new version of the fully nonlinear Boussinesq wave model (FUN- WAVE) initially developed by Kirby et of surfzone-scale optical properties in a Boussinesq model framework, and modeling of Tsunami wave in both

Kirby, James T.

451

Local and Nonlocal Solitary Waves of Boussinesq Equations  

E-Print Network [OSTI]

Local and Nonlocal Solitary Waves of Boussinesq Equations Prabir Daripa Department of Mathematics-local solitary waves of Boussinesq equations are considered. Accord- ing to the classical weakly nonlinear theory of water waves, an illposed Boussinesq equation governs the propagation of long waves to leading order

Daripa, Prabir

452

High Order Hybrid Numerical Simulations of Two Dimensional Detonation Waves  

E-Print Network [OSTI]

High Order Hybrid Numerical Simulations of Two Dimensional Detonation Waves Wei Cai Department detonation waves, we have devel- oped a high order numerical scheme suitable for calculating the detailed transverse wave structures of multidimensional detonation waves. The numerical algorithm uses a multi

Cai, Wei

453

Toward a wave turbulence formulation of statistical nonlinear optics  

E-Print Network [OSTI]

Toward a wave turbulence formulation of statistical nonlinear optics Josselin Garnier,1, * Mietek optical waves have been reported in the literature. This article is aimed at providing a generalized wave, the process of optical wave thermalization to thermo- dynamic equilibrium, which slows down significantly

Garnier, Josselin

454

Electromagnetic Waves Propagation in 3D Plasma Configurations  

E-Print Network [OSTI]

Electromagnetic Waves Propagation in 3D Plasma Configurations Pavel Popovich, W. Anthony Cooper such method is based on heating the plasma by electromagnetic waves with various frequencies. Wave behaviour that allows to simulate mode-conversion effects. The wave equation is formulated in terms of electromagnetic

455

Spin Wave Energies in the Band Theory of Ferromagnetism  

Science Journals Connector (OSTI)

...1967 research-article Spin Wave Energies in the Band Theory of Ferromagnetism...made of the coefficient C in the energy CK of a spin wave of small wave vector K in a ferromagnetic...with Nagaoka's work on spin wave energies in a nearly half-filled band...

1967-01-01T23:59:59.000Z

456

Superconducting travelling wave ring with high gradient accelerating section  

SciTech Connect (OSTI)

Use of a superconducting traveling wave accelerating (STWA) structure instead of a standing wave cavity has major advantages in increasing the accelerating gradient in the ILC. In contrast with standing wave cavity STWA requires feedback loop, which sends wave from the structure output to input, making a superconducting traveling wave ring (STWR). One or few input couplers need to excite STWR and compensate power dissipations due to beam loading. To control traveling wave regime in the structure two independent knobs can be used for tuning both resonant ring frequency and backward wave. We discuss two variants of the STWR with one and two feed couplers.

Avrakhov, P.; Solyak, N.; /Fermilab

2007-06-01T23:59:59.000Z

457

Property:Maximum Wave Height(m) | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:Maximum Wave Height(m) Jump to: navigation, search Property Name Maximum Wave Height(m) Property Type String Pages using the property "Maximum Wave Height(m)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 0.2 + 10-ft Wave Flume Facility + 0.5 + 11-ft Wave Flume Facility + 0.4 + 2 2-ft Flume Facility + 0.6 + 3 3-ft Wave Flume Facility + 0.2 + 5 5-ft Wave Flume Facility + 0.5 + 6 6-ft Wave Flume Facility + 0.4 + A Alden Large Flume + 0.0 + Alden Small Flume + 0.2 + Alden Wave Basin + 0.3 + B Breakwater Research Facility + 0.0 + C Carderock Maneuvering & Seakeeping Basin + 0.6 + Carderock Tow Tank 2 + 0.6 + Carderock Tow Tank 3 + 0.6 +

458

The Wave Function and Quantum Reality  

SciTech Connect (OSTI)

We investigate the meaning of the wave function by analyzing the mass and charge density distributions of a quantum system. According to protective measurement, a charged quantum system has effective mass and charge density distributing in space, proportional to the square of the absolute value of its wave function. In a realistic interpretation, the wave function of a quantum system can be taken as a description of either a physical field or the ergodic motion of a particle. The essential difference between a field and the ergodic motion of a particle lies in the property of simultaneity; a field exists throughout space simultaneously, whereas the ergodic motion of a particle exists throughout space in a time-divided way. If the wave function is a physical field, then the mass and charge density will be distributed in space simultaneously for a charged quantum system, and thus there will exist gravitational and electrostatic self-interactions of its wave function. This not only violates the superposition principle of quantum mechanics but also contradicts experimental observations. Thus the wave function cannot be a description of a physical field but be a description of the ergodic motion of a particle. For the later there is only a localized particle with mass and charge at every instant, and thus there will not exist any self-interaction for the wave function. It is further argued that the classical ergodic models, which assume continuous motion of particles, cannot be consistent with quantum mechanics. Based on the negative result, we suggest that the wave function is a description of the quantum motion of particles, which is random and discontinuous in nature. On this interpretation, the square of the absolute value of the wave function not only gives the probability of the particle being found in certain locations, but also gives the probability of the particle being there. The suggested new interpretation of the wave function provides a natural realistic alternative to the orthodox interpretation, and it also implies that the de Broglie-Bohm theory and many-worlds interpretation are wrong and the dynamical collapse theories are in the right direction by admitting wavefunction collapse.

Gao Shan [Unit for History and Philosophy of Science and Centre for Time, SOPHI, University of Sydney, Sydney, NSW 2006 (Australia)

2011-03-28T23:59:59.000Z

459

Improving the assessment of wave energy resources by means of coupled wave-ocean numerical modeling  

Science Journals Connector (OSTI)

Abstract Sea waves energy represents a renewable and sustainable energy resource, that nevertheless needs to be further investigated to make it more cost-effective and economically appealing. A key step in the process of Wave Energy Converters (WEC) deployment is the energy resource assessment at a sea site either measured or obtained through numerical model analysis. In these kind of studies, some approximations are often introduced, especially in the early stages of the process, viz. waves are assumed propagating in deep waters without underneath ocean currents. These aspects are discussed and evaluated in the Adriatic Sea and its northern part (Gulf of Venice) using locally observed and modeled wave data. In particular, to account for a “state of the art” treatment of the Wave–Current Interaction (WCI) we have implemented the Simulating \\{WAves\\} Nearshore (SWAN) model and the Regional Ocean Modeling System (ROMS), fully coupled within the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) system. COAWST has been applied to a computational grid covering the whole Adriatic Sea and off-line nested to a high-resolution grid in the Gulf of Venice. A 15-year long wave data set collected at the oceanographic tower “Acqua Alta”, located approximately 15 km off the Venice coast, has also been analyzed with the dual purpose of providing a reference to the model estimates and to locally assess the wave energy resource. By using COAWST, we have quantified for the first time to our best knowledge the importance of the WCI effect on wave power estimation. This can vary up to 30% neglecting the current effect. Results also suggest the Gulf of Venice as a suitable testing site for WECs, since it is characterized by periods of calm (optimal for safe installation and maintenance) alternating with severe storms, whose wave energy potentials are comparable to those ordinarily encountered in the energy production sites.

Francesco Barbariol; Alvise Benetazzo; Sandro Carniel; Mauro Sclavo

2013-01-01T23:59:59.000Z

460

Wave Energy Ecological Effects Workshop page 1 of 4 Ecological Effects of Wave Energy Development in the Pacific Northwest  

E-Print Network [OSTI]

Wave Energy Ecological Effects Workshop page 1 of 4 Ecological Effects of Wave Energy Development the capacity to harvest wave energy off its coast as a clean, renewable resource. An important part of moving this agenda forward must include understanding the potential effects of wave energy technology

Wright, Dawn Jeannine

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461

Optical control of large-signal properties of millimeter-wave and sub-millimeter-wave DDR Si IMPATTs  

Science Journals Connector (OSTI)

The authors have proposed a complete large-signal (L-S) model to investigate the optical modulation of high frequency properties of double-drift region (DDR) impact avalanche transit time (IMPATT) devices operating at different millimeter-wave and sub-millimeter-wave ... Keywords: DDR IMPATT device, Flip chip, Millimeter-wave, Optical control, Sub-millimeter-wave, Top mount

Aritra Acharyya, Suranjana Banerjee, J. P. Banerjee

2014-06-01T23:59:59.000Z

462

Standing Waves in a Two-Dimensional Reaction-Diffusion Model with the Short-Wave Instability  

E-Print Network [OSTI]

Standing Waves in a Two-Dimensional Reaction-Diffusion Model with the Short-Wave Instability Milos 25, 1998; In Final Form: October 19, 1998 Various patterns of standing waves are found beyond the onset of the short-wave instability in a model reaction- diffusion system. These include plain

Epstein, Irving R.

463

SHOCK WAVES AND SOLITARY WAVES IN BCC CRYSTALS Institut fr Theoretische und Angewandte Physik, Universitt Stuttgart, Pfaffenwaldring 57, 70550  

E-Print Network [OSTI]

SHOCK WAVES AND SOLITARY WAVES IN BCC CRYSTALS J. Roth Institut für Theoretische und Angewandte waves in bcc crystals have been studied by means of molecular dynamics simulations. The interaction]. Depending on the strength of the shock wave and the propagation direction different phase transition

Roth, Johannes

464

Electron Acoustic Waves (EAW) EAW's are novel kinetic waves that exist only because nonlinear trapping turns off Landau damping.  

E-Print Network [OSTI]

Electron Acoustic Waves (EAW) EAW's are novel kinetic waves that exist only because nonlinear the particle distribution until a kinetic wave can exist at the driver frequency. The results are summarized in the figure on the right. The blue crosses and squares are linear Langmuir waves (called Trivelpiece

California at San Diego, University of

465

Breaking waves: Bifurcations leading to a singular wave state W. Tao Shi, Christopher L. Goodridge, and Daniel P. Lathrop*  

E-Print Network [OSTI]

Breaking waves: Bifurcations leading to a singular wave state W. Tao Shi, Christopher L. Goodridge 1996 We examine free surface wave singularities that show a violent focusing of energy. Periodic, modulated, and frequency locked wave states lead to a state with fluid spikes. When the excitation of free

Lathrop, Daniel P.

466

Circular polarization of obliquely propagating whistler wave magnetic field  

SciTech Connect (OSTI)

The circular polarization of the magnetic field of obliquely propagating whistler waves is derived using a basis set associated with the wave partial differential equation. The wave energy is mainly magnetic and the wave propagation consists of this magnetic energy sloshing back and forth between two orthogonal components of magnetic field in quadrature. The wave electric field energy is small compared to the magnetic field energy.

Bellan, P. M. [Applied Physics, Caltech, Pasadena California 91125 (United States)] [Applied Physics, Caltech, Pasadena California 91125 (United States)

2013-08-15T23:59:59.000Z

467

Inhomogeneous High Frequency Expansion-Free Gravitational Waves  

E-Print Network [OSTI]

We describe a natural inhomogeneous generalization of high frequency plane gravitational waves. The waves are high frequency waves of the Kundt type whose null propagation direction in space-time has vanishing expansion, twist and shear but is not covariantly constant. The introduction of a cosmological constant is discussed in some detail and a comparison is made with high frequency gravity waves having wave fronts homeomorphic to 2-spheres.

C. Barrabes; P. A. Hogan

2007-06-18T23:59:59.000Z

468

Wave forces on monotower structures fitted with icebreaking cones  

E-Print Network [OSTI]

and theory presently used in the design of offshore tower structures. Presently, wave forces are predicted using a wave- structure interaction approach, diffraction theory, or some combination of the two. An alternative wave force theory was presented... of structures fitted with icebreaking cones. THEORETICAL DEVELOPMENT One of the major difficulties in analyzing the dynamic response of offshore structures is determining the wave-induced excitation forces. There are currently two methods of predicting wave...

Harrington, Michael Gerard

2012-06-07T23:59:59.000Z

469

Analysis of Gravitational-Wave Data  

Science Journals Connector (OSTI)

The field of gravitational-wave data analysis has expanded greatly over the past decade and significant developments have been made in methods of analyzing the data taken by resonant bar and interferometric detectors, as well as analysis of mock LISA data. This book introduces much of the required theoretical background in gravitational physics, statistics and time series analysis before moving on to a discussion of gravitational-wave data analysis techniques themselves. The book opens with an overview of the theory of gravitational radiation, providing a comprehensive discussion of various introductory topics: linearized gravity, transverse traceless gauge, the effects of gravitational waves (via geodesic deviation), energy and momentum carried by the waves, and generation of gravitational waves. The second chapter provides an introduction to the various sources of gravitational waves, followed by more detailed expositions on some of the primary sources. For example, the description of compact binary coalescence is thorough and includes a brief exposition of the post-Newtonian formalism and the effective one body method. There also follows extended derivations of gravitational waves from distorted neutron stars, supernovae and a stochastic background. Chapter three provides an introduction to the statistical theory of signal detection, including a discussion of parameter estimation via the Fisher matrix formalism. This is presented from a very mathematical, postulate based, standpoint and I expect that even established gravitational-wave data analysts will find the derivations here more formal than they are used to. The discussion of likelihood ratio tests and the importance of prior probabilities are presented particularly clearly. The fourth chapter covers time series analysis, with power spectrum estimation, extraction of periodic signals and goodness of fit tests. Chapter five switches topics and gives the details of the response of gravitational-wave detectors. The derivation is kept general at the outset, so that a detailed discussion of the response of the LISA detector is possible, before restricting to the long wavelength approximation for discussion of ground based detectors. Chapter six provides a detailed exposition of the maximum likelihood method for searching for signals in Gaussian noise. Jaranowski and Królak developed the F-statistic search method, which has become standard in searches for continuous waves and is also used in LISA data analysis. Perhaps then, it is unsurprising that the discussion of matched filtering is couched in terms of a generalized F-statistic method. This chapter also covers parameter estimation via the Fisher matrix and applications to networks of detectors. As in other chapters, the initial formalism is rather general but, in later sections, specific examples are given, such as the application to continuous wave, compact binary coalescence and stochastic signals. The seventh, and final, chapter provides examples of concrete methods for analyzing data. The focus is on methods which the authors are most familiar with and consequently these are mostly relevant for the analysis of resonant bar data and searches for continuous wave signals. The discussion of complexities arising in creating banks of template waveforms is likely to be of more general interest. The last two chapters of the book, which contain the meat of the subject of gravitational-wave data analysis, are regrettably short. Several large research areas are not discussed at all, including: time–frequency excess power search methods; Bayesian parameter estimation techniques (e.g. Markov Chain Monte Carlo) to go past the Fisher matrix approximation; signal consistency tests and other methods of dealing with non-Gaussian data. On the back cover, it states that `this book introduces researchers entering the field ... to gravitational-wave data analysis'. While this book certainly does contain much of the necessary introductory material, the presentation will likely prove too technical to be easily accessible to beginn

Stephen Fairhurst

2010-01-01T23:59:59.000Z

470

MHK Technologies/WaveStar | Open Energy Information  

Open Energy Info (EERE)

WaveStar WaveStar < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage WaveStar.jpg Technology Profile Primary Organization Wave Star Energy Project(s) where this technology is utilized *MHK Projects/Wave Star Energy 1 10 Scale Model Test Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 5/6: System Integration and Technology Laboratory Demonstration Technology Description The Wave Star machine does not form a barrier against the waves - with a view to harnessing all their energy - but instead cuts in at right angles to the direction of the wave. In this way, the waves run through the length of the machine and the energy is utilized in a continuous process, which produces a smooth output. On each side of the oblong Wave Star machine, there are a number of hemisphere-shaped floats, which are half submerged in the water. When a wave rolls in, the floats are pressed up - one after the other - until the wave subsides. Each float is positioned at the end of an arm and pumps energy by the vertical movement of the waves up and down. Every time a float is raised or lowered, a piston presses oil into the machine's common transmission system. The pressure drives a hydraulic motor, which drives a generator, which produces electricity. As the machine is several wave lengths long, the floats will work continuously to harness the energy and produce a smooth output.

471

Jumping solitary waves in an autonomous reactiondiffusion system with subcritical wave instability  

E-Print Network [OSTI]

Jumping solitary waves in an autonomous reaction­diffusion system with subcritical wave instability as solutions to a reaction­diffusion system with a subcritical short-wavelength instability. We demonstrate systems with a subcritical oscillatory instability.17 Here we present a new type of solitary traveling

Epstein, Irving R.

472

Dances with waves Air-sea interaction The generation and growth of waves due to  

E-Print Network [OSTI]

and the atmosphere fuels to a large extent the atmospheric and oceanic circulation. The release of water vapourDances with waves Air-sea interaction · The generation and growth of waves due to wind blowing over water, is a well-known example of air-sea interaction. Momentum transported downwards from the air

Haak, Hein

473

Alfv\\'en Wave Driven High Frequency Waves in the Solar Atmosphere: Implications for Ion Heating  

E-Print Network [OSTI]

This work is an extension of Kaghashvili [1999] where ion-cyclotron wave dissipation channel for Alfv\\'en waves was discussed. While our earlier study dealt with the mode coupling in the commonly discussed sense, here we study changes in the initial waveform due to interaction of the initial driver Alfv\\'en wave and the plasma inhomogeneity, which are implicitly present in the equations, but were not elaborated in Kaghashvili [1999]. Using a cold plasma approximation, we show how high frequency waves (higher than the initial driver Alfv\\'en wave frequency) are generated in the inhomogeneous solar plasma flow. The generation of the high frequency forward and backward propagating modified fast magnetosonic/whistler waves as well as the generation of the driven Alfv\\'en waves is discussed in the solar atmosphere. The generated high frequency waves have a shorter dissipation timescale, and they can also resonant interact with particles using both the normal cyclotron and anomalous cyclotron interaction channels. ...

Kaghashvili, Edisher Kh

2014-01-01T23:59:59.000Z

474

A Travelling-Wave Uni-Travelling Photodiode for Continuous Wave Terahertz Generation  

E-Print Network [OSTI]

A Travelling-Wave Uni-Travelling Photodiode for Continuous Wave Terahertz Generation E. Rouvalis1 the performance of photodiodes both in terms of responsivity and frequency response. Thus, the resulting ultra-fast photodiode integrated with an antenna can be used as the photomixing element in order to generate

Haddadi, Hamed

475

The Short-Wave Limit of Linear Equatorial Kelvin Waves in a Shear Flow  

Science Journals Connector (OSTI)

The effects of latitudinal shear on equatorial Kelvin waves in the one-and-one-half-layer model are examined through a mixture of perturbation theory and numerical solutions. For waves proportional to exp(ikx), where k is the zonal wavenumber and ...

John P. Boyd

2005-06-01T23:59:59.000Z

476

Field dependence of the vortex structure in d-wave and s-wave superconductors  

Science Journals Connector (OSTI)

We study the vortex structure and its field dependence within the framework of the quasiclassical Eilenberger theory to find the difference between the dx2-y2- and s-wave pairings. We clarify the effect of the dx2-y2-wave nature and the vortex lattice effect on the vortex structure of the pair potential, the internal field and the local density of states. The dx2-y2-wave pairing introduces a fourfold-symmetric structure around each vortex core. With increasing field, their contribution becomes significant to the whole structure of the vortex lattice state, depending on the vortex lattice’s configuration. It is reflected in the form factor of the internal field, which may be detected by small-angle neutron scattering, or the resonance line shape of muon spin resonance and NMR experiments. We also study the induced s- and dxy-wave components around the vortex in dx2-y2-wave superconductors.

Masanori Ichioka; Akiko Hasegawa; Kazushige Machida

1999-04-01T23:59:59.000Z

477

Matter Waves and Orbital Quantum Numbers  

E-Print Network [OSTI]

The atom's orbital electron structure in terms of quantum numbers (principal, azimuthal, magnetic and spin) results in space for a maximum of: 2 electrons in the n=1 orbit, 8 electrons in the n=2 orbit, 18 electrons in the n=3 orbit, and so on. Those dispositions are correct, but that is not because of quantum numbers nor angular momentum nor a "Pauli exclusion principle". Matter waves were discovered in the early 20th century from their wavelength, which was predicted by DeBroglie to be, Planck's constant divided by the particle's momentum. But, the failure to obtain a reasonable theory for the matter wave frequency resulted in loss of interest. That problem is resolved in "A Reconsideration of Matter Waves" in which a reinterpretation of Einstein's derivation of relativistic kinetic energy [which produced his famous E = mc^2] leads to a valid matter wave frequency and a new understanding of particle kinetics and the atom's stable orbits. It is analytically shown that the orbital electron arrangement is enforced by the necessity of accommodating the space that each orbiting electron's matter wave occupies.

Roger Ellman

2005-05-18T23:59:59.000Z

478

Tunable damper for an acoustic wave guide  

DOE Patents [OSTI]

A damper for tunably damping acoustic waves in an ultrasonic waveguide is provided which may be used in a hostile environment such as a nuclear reactor. The area of the waveguide, which may be a selected size metal rod in which acoustic waves are to be damped, is wrapped, or surrounded, by a mass of stainless steel wool. The wool wrapped portion is then sandwiched between tuning plates, which may also be stainless steel, by means of clamping screws which may be adjusted to change the clamping force of the sandwiched assembly along the waveguide section. The plates are preformed along their length in a sinusoidally bent pattern with a period approximately equal to the acoustic wavelength which is to be damped. The bent pattern of the opposing plates are in phase along their length relative to their sinusoidal patterns so that as the clamping screws are tightened a bending stress is applied to the waveguide at 180/sup 0/ intervals along the damping section to oppose the acoustic wave motions in the waveguide and provide good coupling of the wool to the guide. The damper is tuned by selectively tightening the clamping screws while monitoring the amplitude of the acoustic waves launched in the waveguide. It may be selectively tuned to damp particular acoustic wave modes (torsional or extensional, for example) and/or frequencies while allowing others to pass unattenuated.

Rogers, S.C.

1982-10-21T23:59:59.000Z

479

Offshore wave power measurements—A review  

Science Journals Connector (OSTI)

The first wave power patent was filed in 1799. Since then, hundreds of ideas for extraction of energy from ocean waves have surfaced. In the process of developing a concept, it is important to learn from previous successes and failures, and this is not least important when moving into the ocean. In this paper, a review has been made with the purpose of finding wave power projects that have made ocean trials, and that also have reported what has been measured during the trials, and how it has been measured. In relation to how many projects have done work on wave power, surprisingly few have reported on such measurements. There can be many reasons for this, but one is likely the great difficulties in working with experiments in an ocean environment. Many of the projects have reported on sensor failures, unforeseen events, and other general problems in making measurements at sea. The most common site measurement found in this review was wave height. Such measurements was almost universal, although the technologies used differed somewhat. The most common device measurements were electric voltages and/or currents and system pressures (air and water). Device motion and mooring forces were also commonly measured. The motion measurements differed the most between the projects, and many varying methods were used, such as accelerometers, wire sensors, GPS systems, optical systems and echo sounders.

Simon Lindroth; Mats Leijon

2011-01-01T23:59:59.000Z

480

MHK Technologies/bioWave | Open Energy Information  

Open Energy Info (EERE)

bioWave bioWave < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage BioWave.jpg Technology Profile Primary Organization BioPower Systems Pty Ltd Project(s) where this technology is utilized *MHK Projects/bioWAVE Pilot Plant Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 5/6: System Integration and Technology Laboratory Demonstration Technology Description TThe bioWAVE is based on the swaying motion of sea plants in the presence of ocean waves. The hydrodynamic interaction of the buoyant blades with the oscillating flow field is designed for maximum energy absorption. Mooring Configuration Gravity base Optimum Marine/Riverline Conditions 30 to 50M depth 20kW m wave climate or greater

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481

MHK Technologies/The Crestwing Wave Energy Converter | Open Energy  

Open Energy Info (EERE)

Crestwing Wave Energy Converter Crestwing Wave Energy Converter < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage The Crestwing Wave Energy Converter.jpg Technology Profile Primary Organization Waveenergyfyn Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 7 8 Open Water System Testing Demonstration and Operation Technology Description The connected pontoons swing around the hinge when the top of the waves passes under the floats The pontoons relative motion is converted into usable energy through a linear PTO system The pontoons are pushed upwards from the below passing wave and again dragged down by the same passing wave Complex hydrodynamic conditions occur under the pontoons when the wave formation pushes the unit up and down simultaneously The energy from waves can be divided into fifty percent potential energy and fifty percent kinetic energy Crestwing absorbs both the potential energy as the kinetic energy which is the back ground for the high efficiency

482

L-Shaped Flume Wave Basin | Open Energy Information  

Open Energy Info (EERE)

L-Shaped Flume Wave Basin L-Shaped Flume Wave Basin Jump to: navigation, search Basic Specifications Facility Name L-Shaped Flume Wave Basin Overseeing Organization United States Army Corp of Engineers (ERDC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 76.2 Beam(m) 15.2 Depth(m) 1.8 Water Type Freshwater Special Physical Features Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Automated data acquisition and control sys

483

Fast Computation Algorithm for Discrete Resonances among Gravity Waves  

E-Print Network [OSTI]

Traditionally resonant interactions among short waves, with large real wave-numbers, were described statistically and only a small domain in spectral space with integer wave-numbers, discrete resonances, had to be studied separately in resonators. Numerical simulations of the last few years showed unambiguously the existence of some discrete effects in the short-waves part of the wave spectrum. Newly presented model of laminated turbulence explains theoretically appearance of these effects thus putting a novel problem - construction of fast algorithms for computation of solutions of resonance conditions with integer wave-numbers of order $10^3$ and more. Example of such an algorithm for 4-waves interactions of gravity waves is given. Its generalization on the different types of waves is briefly discussed.

Elena Kartashova

2006-05-25T23:59:59.000Z

484

The Standing Wave on a String as an Oscillator  

Science Journals Connector (OSTI)

In the usual treatment of waves in introductory courses one begins with traveling waves and the frequency/wavelength relationship f??=?v where v is the wave velocity. One then makes the point about superposition and shows that two waves traveling in opposite directions can add up to a standing wave; Eq. (1) still applies. This approach is problematic in two ways: (1) The motion being described standing waves has no apparent “velocity ” and so it seems unnecessarily complex—perhaps unreasonably complex—to construct it out of moving waves; (2) It is not easy to derive the formula for the velocity of waves especially for an audience without calculus or without multi-variate calculus (the wave equation).

Michael Sobel

2007-01-01T23:59:59.000Z

485

INTERFERENCE FRINGES OF SOLAR ACOUSTIC WAVES AROUND SUNSPOTS  

SciTech Connect (OSTI)

Solar acoustic waves are scattered by a sunspot due to the interaction between the acoustic waves and the sunspot. The sunspot, excited by the incident wave, generates the scattered wave. The scattered wave is added to the incident wave to form the total wave around the sunspot. The interference fringes between the scattered wave and the incident wave are visible in the intensity of the total wave because the coherent time of the incident wave is of the order of a wave period. The strength of the interference fringes anti-correlates with the width of temporal spectra of the incident wave. The separation between neighboring fringes increases with the incident wavelength and the sunspot size. The strength of the fringes increases with the radial order n of the incident wave from n = 0 to n = 2, and then decreases from n = 2 to n = 5. The interference fringes play a role analogous to holograms in optics. This study suggests the feasibility of using the interference fringes to reconstruct the scattered wavefields of the sunspot, although the quality of the reconstructed wavefields is sensitive to the noise and errors in the interference fringes.

Chou, Dean-Yi; Zhao Hui; Yang, Ming-Hsu; Liang, Zhi-Chao, E-mail: chou@phys.nthu.edu.tw [Physics Department, National Tsing Hua University, Hsinchu, Taiwan (China)

2012-10-20T23:59:59.000Z

486

Estimating the potential of ocean wave power resources  

Science Journals Connector (OSTI)

The realistic assessment of an ocean wave energy resource that can be converted to an electrical power at various offshore sites depends upon many factors, and these include estimating the resource recognizing the random nature of the site-specific wave field, and optimizing the power conversion from particular wave energy conversion devices. In order to better account for the uncertainty in wave power resource estimates, conditional probability distribution functions of wave power in a given sea-state are derived. Theoretical expressions for the deep and shallow water limits are derived and the role of spectral width is studied. The theoretical model estimates were compared with the statistics obtained from the wave-by-wave analysis of JONSWAP based ocean wave time-series. It was shown that the narrow-band approximation is appropriate when the variability due to wave period is negligible. The application of the short-term models in evaluating the long-term wave power resource at a site was illustrated using wave data measured off the California coast. The final example illustrates the procedure for incorporating the local wave data and the sea-state model together with a wave energy device to obtain an estimate of the potential wave energy that could be converted into a usable energy resource.

Amir H. Izadparast; John M. Niedzwecki

2011-01-01T23:59:59.000Z

487

Gravitational waves and gamma-ray bursts  

E-Print Network [OSTI]

Gamma-Ray Bursts are likely associated with a catastrophic energy release in stellar mass objects. Electromagnetic observations provide important, but indirect information on the progenitor. On the other hand, gravitational waves emitted from the central source, carry direct information on its nature. In this context, I give an overview of the multi-messenger study of gamma-ray bursts that can be carried out by using electromagnetic and gravitational wave observations. I also underline the importance of joint electromagnetic and gravitational wave searches, in the absence of a gamma-ray trigger. Finally, I discuss how multi-messenger observations may probe alternative gamma-ray burst progenitor models, such as the magnetar scenario.

Alessandra Corsi; for the LIGO Scientific Collaboration; for the Virgo Collaboration

2012-05-11T23:59:59.000Z

488

Active micromixer using surface acoustic wave streaming  

DOE Patents [OSTI]

An active micromixer uses a surface acoustic wave, preferably a Rayleigh wave, propagating on a piezoelectric substrate to induce acoustic streaming in a fluid in a microfluidic channel. The surface acoustic wave can be generated by applying an RF excitation signal to at least one interdigital transducer on the piezoelectric substrate. The active micromixer can rapidly mix quiescent fluids or laminar streams in low Reynolds number flows. The active micromixer has no moving parts (other than the SAW transducer) and is, therefore, more reliable, less damaging to sensitive fluids, and less susceptible to fouling and channel clogging than other types of active and passive micromixers. The active micromixer is adaptable to a wide range of geometries, can be easily fabricated, and can be integrated in a microfluidic system, reducing dead volume. Finally, the active micromixer has on-demand on/off mixing capability and can be operated at low power.

Branch; Darren W. (Albuquerque, NM), Meyer; Grant D. (Ithaca, NY), Craighead; Harold G. (Ithaca, NY)

2011-05-17T23:59:59.000Z

489

Wormhole for electron waves in graphene  

Science Journals Connector (OSTI)

The theory of transformation optics for light has fascinated the scientific community for almost one decade due to its revolutionary and groundbreaking implications. Because the propagation of electrons in condensed-matter systems is also described by a wave equation, one may also envision the extension of this idea to matter waves. Here, we suggest that graphene can be used as a platform to demonstrate a “tunnel” or “wormhole” for electrons. Based on an effective medium approach, we theoretically demonstrate that two properly designed graphene-based nanomaterials can effectively “annihilate” one another from an electronic point of view, and provide for the delocalization of the wave-function stationary states, similar to a wormhole.

David E. Fernandes; Nader Engheta; Mário G. Silveirinha

2014-07-11T23:59:59.000Z

490

Critical point anomalies include expansion shock waves  

SciTech Connect (OSTI)

From first-principle fluid dynamics, complemented by a rigorous state equation accounting for critical anomalies, we discovered that expansion shock waves may occur in the vicinity of the liquid-vapor critical point in the two-phase region. Due to universality of near-critical thermodynamics, the result is valid for any common pure fluid in which molecular interactions are only short-range, namely, for so-called 3-dimensional Ising-like systems, and under the assumption of thermodynamic equilibrium. In addition to rarefaction shock waves, diverse non-classical effects are admissible, including composite compressive shock-fan-shock waves, due to the change of sign of the fundamental derivative of gasdynamics.

Nannan, N. R., E-mail: ryan.nannan@uvs.edu [Mechanical Engineering Discipline, Anton de Kom University of Suriname, Leysweg 86, PO Box 9212, Paramaribo, Suriname and Process and Energy Department, Delft University of Technology, Leeghwaterstraat 44, 2628 CA Delft (Netherlands); Guardone, A., E-mail: alberto.guardone@polimi.it [Department of Aerospace Science and Technology, Politecnico di Milano, Via La Masa 34, 20156 Milano (Italy); Colonna, P., E-mail: p.colonna@tudelft.nl [Propulsion and Power, Delft University of Technology, Kluyverweg 1, 2629 HS Delft (Netherlands)

2014-02-15T23:59:59.000Z

491

Observation of propagating edge spin waves modes  

SciTech Connect (OSTI)

Broadband magnetization response of equilateral triangular 1000 nm Permalloy dots has been studied under an in-plane magnetic field, applied parallel (buckle state), and perpendicular (Y state) to the triangles base. Micromagnetic simulations identify edge spin waves (E-SWs) in the buckle state as SWs propagating along the two adjacent edges. These quasi one-dimensional spin waves emitted by the vertex magnetic charges gradually transform from propagating to standing due to interference and are weakly affected by dipolar interdot interaction and variation of the aspect ratio. Spin waves in the Y state have a two dimensional character. These findings open perspectives for implementation of the E-SWs in magnonic crystals and thin films.

Lara, A.; Aliev, F. G., E-mail: farkhad.aliev@uam.es [Dpto. Física de la Materia Condensada C-III, Instituto Nicolas Cabrera (INC) and Condensed Matter Physics Institute (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049 (Spain); Metlushko, V. [Department of Electrical and Computer Engineering, University of Illinois, Chicago, Illinois 60607 (United States)

2013-12-07T23:59:59.000Z

492

Ion Heating with Beating Electrostatic Waves  

SciTech Connect (OSTI)

The nonlinear interaction of a magnetized ion with two beating electrostatic waves (BEW) whose frequencies differ by a cyclotron harmonic can lead, under some conditions [Phys. Rev. E 69, 046402 (2004)], to vigorous acceleration for an ion with arbitrarily low initial velocity. When applied to an ensemble of ions, this mechanism promises enhanced heating over single electrostatic wave (SEW) heating for comparable wave energy densities. The extension of single ion acceleration to heating (SEWH and BEWH) of an ensemble of initially thermalized ions was carried out to compare the processes. Using a numerical solution of the Vlasov equation as a guideline, an analytical expression for the heating level was derived with Lie transforms and was used to show BEWH's superiority over all parameter space.

Jorns, B.; Choueiri, E. Y. [Electric Propulsion and Plasma Dynamics Laboratory (EPPDyL), Princeton University, Princeton, New Jersey 08544 (United States)

2011-02-25T23:59:59.000Z

493

Gravitational waves from cosmic bubble collisions  

E-Print Network [OSTI]

Cosmic bubbles are nucleated through the quantum tunneling process. After nucleation they would expand and undergo collisions with each other. In this paper, we focus in particular on collisions of two equal-sized bubbles and compute gravitational waves emitted from the collisions. First, we study the mechanism of the collisions by means of a real scalar field and a quartic potential of the field. Then, using this scalar field model, we compute gravitational waves from the collisions in a straightforward manner. In the quadrupole approximation, time-domain gravitational waveforms are directly obtained by integrating the energy-momentum tensors over the volume of the wave sources, where the energy-momentum tensors are expressed in terms of the scalar field, the local geometry and the potential; therefore, containing all information about the bubble collisions. We present gravitational waveforms emitted during (i) the initial-to-intermediate stage of strong collisions and (ii) the final stage of weak collisions...

Kim, Dong-Hoon; Lee, Wonwoo; Yang, Jongmann; Yeom, Dong-han

2014-01-01T23:59:59.000Z

494

Environmental Effects for Gravitational-wave Astrophysics  

E-Print Network [OSTI]

The upcoming detection of gravitational waves by terrestrial interferometers will usher in the era of gravitational-wave astronomy. This will be particularly true when space-based detectors will come of age and measure the mass and spin of massive black holes with exquisite precision and up to very high redshifts, thus allowing for better understanding of the symbiotic evolution of black holes with galaxies, and for high-precision tests of General Relativity in strong-field, highly-dynamical regimes. Such ambitious goals require that astrophysical environmental pollution of gravitational-wave signals be constrained to negligible levels, so that neither detection nor estimation of the source parameters are significantly affected. Here, we consider the main sources for space-based detectors -the inspiral, merger and ringdown of massive black-hole binaries and extreme mass-ratio inspirals- and account for various effects on their gravitational waveforms, including electromagnetic fields, cosmological evolution, ...

Barausse, Enrico; Pani, Paolo

2014-01-01T23:59:59.000Z

495

Biologic response to complex blast waves  

SciTech Connect (OSTI)

Small, bare charges were detonated inside an M59 armored personnel carrier (APC) in an attempt to simulate the complex blast waves generated by the jets from shaped-charge warheads penetrating into armored vehicles. Anesthetized sheep were placed inside the APC at 92- and 122-cm ranges from 57- or 113-g pentolite charges. Pressure-time was measured by pressure transducers either mounted on the animals or free standing at comparable ranges on the opposite side of the vehicle. In general, the waveforms were characterized by an initial shock wave of less than 1-msec duration followed by repeated reflections of decreasing magnitude. No deaths nor lung hemorrhages were observed, but all the animals sustained severe ear injury. Animals subjected to peak overpressures of 1.2 to 2.3 bar from the 113-g explosions also received slight non-auditory blast injuries to the upper respiratory and gastrointestinal tracts; those exposed to peak overpressures of just under 1 bar from the 57-g charges did not. The non-auditory blast injuries inside the APC were more severe than those sustained by sheep at comparable distances from 113-g charges in the open. The results suggested that the biological consequences of a complex wave of the type encountered in this study can be equated approximately to a Friedlander wave with a peak overpressure equal to that of the complex wave and with a total impulse equal to the impulse over the first 2 to 3 msec of the complex wave. 9 refs., 7 figs., 1 tab.

Richmond, D.R.; Yelverton, J.T.; Fletcher, E.R.; Phillips, Y.Y.

1985-01-01T23:59:59.000Z

496

Nonlinear waves in strongly interacting relativistic fluids  

E-Print Network [OSTI]

During the past decades the study of strongly interacting fluids experienced a tremendous progress. In the relativistic heavy ion accelerators, specially the RHIC and LHC colliders, it became possible to study not only fluids made of hadronic matter but also fluids of quarks and gluons. Part of the physics program of these machines is the observation of waves in this strongly interacting medium. From the theoretical point of view, these waves are often treated with li-nearized hydrodynamics. In this text we review the attempts to go beyond linearization. We show how to use the Reductive Perturbation Method to expand the equations of (ideal and viscous) relativistic hydrodynamics to obtain nonlinear wave equations. These nonlinear wave equations govern the evolution of energy density perturbations (in hot quark gluon plasma) or baryon density perturbations (in cold quark gluon plasma and nuclear matter). Different nonlinear wave equations, such as the breaking wave, Korteweg-de Vries and Burgers equations, are obtained from different equations of state (EOS). In nuclear matter, the Walecka EOS may lead to a KdV equation. We explore equations of state such as those extracted from the MIT Bag Model and from QCD in the mean field theory approach. Some of these equations are integrable and have analytical solitonic solutions. We derive these equations also in spherical and cylindrical coordinates. We extend the analysis to two and three dimensions to obtain the Kadomtsev-Petviashvili (KP) equation, which is the generalization of the KdV. The KP is also integrable and presents analytical solitonic solutions. In viscous relativistic hydrodynamics we have second order patial derivatives which physically represent dissipation terms. We present numerical solutions and their corresponding algorithms for the cases where the equations are not integrable.

D. A. Fogaça; F. S. Navarra; L. G. Ferreira Filho

2012-12-31T23:59:59.000Z

497

Dynamics Simulation in a Wave Environment  

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

Coupled Dynamic Simulation in a Wave Coupled Dynamic Simulation in a Wave Environment (Navatek, AEGIR, and WECs) Marine and Hydrokinetics Instrumentation Workshop 9 July 2012 David Kring, Navatek Ltd. Presentation Overview * Introduction to Navatek * AEGIR brief: resistance, seakeeping, global and local loads a 3D, NURBS-based, high-order, Rankine boundary element method ... from same lab as at MIT as WAMIT and SWAN, with pFFT acceleration coupling with controls, structures, aerodynamics, power take-offs * Some WEC applications at Navatek 2 Honolulu, Hawaii, USA Company Background A "Research Shipyard" based in Honolulu, HI Combining simulation-based design with prototype construction

498

Wave-Driven Rotation In Centrifugal Mirrors  

SciTech Connect (OSTI)

Centrifugal mirrors use supersonic rotation to provide axial confinement and enhanced stability. Usually the rotation is produced using electrodes, but these electrodes have limited the rotation to the Alfven critical ionization velocity, which is too slow to be useful for fusion. Instead, the rotation could be produced using radio frequency waves. A fixed azimuthal ripple is a simple and efficient wave that could produce rotation by harnessing alpha particle energy. This is an extension of the alpha channeling effect. The alpha particle power and efficiency in a simulated devices is sufficient to produce rotation without external energy input. By eliminating the need for electrodes, this opens new opportunities for centrifugal traps.

Abraham J. Fetterman and Nathaniel J. Fisch

2011-03-28T23:59:59.000Z

499

Magnetic Field Generation by Detonation Waves  

Science Journals Connector (OSTI)

A simple model is given for the spontaneous magnetic field generation by a detonation wave in condensed matter. The field is shown to arise from the noncollinearity of the thermal and electron density gradients near a medium boundary at the detonation shock front. The model allows calculation of approximate values for the field strength at the front and penetration ahead of the detonation wave. For typical explosive media interfaced by air the magnetic field is predicted to lie in the range 0.1 to 15 G.

Michael J. Frankel and Edward T. Toton

1979-12-10T23:59:59.000Z

500

A traveling wave piezoelectric beam robot  

Science Journals Connector (OSTI)

In this paper, the operation principles of a traveling wave piezoelectric beam robot are presented. A prototype consisting of an aluminum beam structure, with two non-collocated piezoelectric patches bonded on its surface, was fabricated and tested to demonstrate the generation of a traveling wave on the beam based on the one mode excitation and the two mode excitation operation principles for propulsion. A numerical model was developed and used to study and optimize the generated motion of the piezoelectric beam robot. Experimental characterization of the robot for the two types of operation has been carried out, a comparison between them is made and results are given in this paper.

H Hariri; Y Bernard; A Razek

2014-01-01T23:59:59.000Z