Sample records for island sound tidal

  1. EA-1949: Admiralty Inlet Pilot Tidal Project, Puget Sound, WA

    Broader source: Energy.gov [DOE]

    This EA analyzes the potential environmental effects of a proposal by the Public Utility District No. 1 of Snohomish County, Washington to construct and operate the Admiralty Inlet Tidal Project. The proposed 680-kilowatt project would be located on the east side of Admiralty Inlet in Puget Sound, Washington, about 1 kilometer west of Whidbey Island, entirely within Island County, Washington. The Federal Energy Regulatory Commission (FERC) is the lead agency. The DOE NEPA process for this project has been canceled.

  2. Tidal Residual Eddies and their Effect on Water Exchange in Puget Sound

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping

    2013-08-30T23:59:59.000Z

    Tidal residual eddies are one of the important hydrodynamic features in tidally dominant estuaries and coastal bays, and they could have significant effects on water exchange in a tidal system. This paper presents a modeling study of tides and tidal residual eddies in Puget Sound, a tidally dominant fjord-like estuary in the Pacific Northwest coast, using a three-dimensional finite-volume coastal ocean model. Mechanisms of vorticity generation and asymmetric distribution patterns around an island/headland were analyzed using the dynamic vorticity transfer approach and numerical experiments. Model results of Puget Sound show that a number of large twin tidal residual eddies exist in the Admiralty Inlet because of the presence of major headlands in the inlet. Simulated residual vorticities near the major headlands indicate that the clockwise tidal residual eddy (negative vorticity) is generally stronger than the anticlockwise eddy (positive vorticity) because of the effect of Coriolis force. The effect of tidal residual eddies on water exchange in Puget Sound and its sub-basins were evaluated by simulations of dye transport. It was found that the strong transverse variability of residual currents in the Admiralty Inlet results in a dominant seaward transport along the eastern shore and a dominant landward transport along the western shore of the Inlet. A similar transport pattern in Hood Canal is caused by the presence of tidal residual eddies near the entrance of the canal. Model results show that tidal residual currents in Whidbey Basin are small in comparison to other sub-basins. A large clockwise residual circulation is formed around Vashon Island near entrance of South Sound, which can potentially constrain the water exchange between the Central Basin and South Sound.

  3. NOAA Technical Memorandum OAR PMEL-122 Tidal Datum Distributions in Puget Sound,

    E-Print Network [OSTI]

    NOAA Technical Memorandum OAR PMEL-122 Tidal Datum Distributions in Puget Sound, Washington, Based . . . . . . . . . . . . . . 5 3. Puget Sound Channel Tide Model . . . . . . . . . . . . . . . 6 3.1 Description of the channel . . . . . . . . . . . . . . . . . . . . . . . . . 30 9. Appendix: Tidal harmonic constants in Puget Sound . . . 30 10. References

  4. Feasibility of Tidal and Ocean Current Energy in False Pass, Aleutian Islands, Alaska FINAL REPORT

    SciTech Connect (OSTI)

    Wright, Bruce Albert [Aleutian Pribilof Islands Association] [Aleutian Pribilof Islands Association

    2014-05-07T23:59:59.000Z

    The Aleutian Pribilof Islands Association was awarded a U.S. Department of Energy Tribal Energy Program grant (DE-EE0005624) for the Feasibility of Tidal and Ocean Current Energy in False Pass, Aleutian Islands, Alaska (Project). The goal of the Project was to perform a feasibility study to determine if a tidal energy project would be a viable means to generate electricity and heat to meet long-term fossil fuel use reduction goals, specifically to produce at least 30% of the electrical and heating needs of the tribally-owned buildings in False Pass. The Project Team included the Aleut Region organizations comprised of the Aleutian Pribilof Island Association (APIA), and Aleutian Pribilof Island Community Development Association (APICDA); the University of Alaska Anchorage, ORPC Alaska a wholly-owned subsidiary of Ocean Renewable Power Company (ORPC), City of False Pass, Benthic GeoScience, and the National Renewable Energy Laboratory (NREL). The following Project objectives were completed: collected existing bathymetric, tidal, and ocean current data to develop a basic model of current circulation at False Pass, measured current velocities at two sites for a full lunar cycle to establish the viability of the current resource, collected data on transmission infrastructure, electrical loads, and electrical generation at False Pass, performed economic analysis based on current costs of energy and amount of energy anticipated from and costs associated with the tidal energy project conceptual design and scoped environmental issues. Utilizing circulation modeling, the Project Team identified two target sites with strong potential for robust tidal energy resources in Isanotski Strait and another nearer the City of False Pass. In addition, the Project Team completed a survey of the electrical infrastructure, which identified likely sites of interconnection and clarified required transmission distances from the tidal energy resources. Based on resource and electrical data, the Project Team developed a conceptual tidal energy project design utilizing ORPC’s TidGen® Power System. While the Project Team has not committed to ORPC technology for future development of a False Pass project, this conceptual design was critical to informing the Project’s economic analysis. The results showed that power from a tidal energy project could be provided to the City of False at a rate at or below the cost of diesel generated electricity and sold to commercial customers at rates competitive with current market rates, providing a stable, flat priced, environmentally sound alternative to the diesel generation currently utilized for energy in the community. The Project Team concluded that with additional grants and private investment a tidal energy project at False Pass is well-positioned to be the first tidal energy project to be developed in Alaska, and the first tidal energy project to be interconnected to an isolated micro grid in the world. A viable project will be a model for similar projects in coastal Alaska.

  5. Study of the Acoustic Effects of Hydrokinetic Tidal Turbines in Admiralty Inlet, Puget Sound

    SciTech Connect (OSTI)

    Brian Polagye; Jim Thomson; Chris Bassett; Jason Wood; Dom Tollit; Robert Cavagnaro; Andrea Copping

    2012-03-30T23:59:59.000Z

    Hydrokinetic turbines will be a source of noise in the marine environment - both during operation and during installation/removal. High intensity sound can cause injury or behavioral changes in marine mammals and may also affect fish and invertebrates. These noise effects are, however, highly dependent on the individual marine animals; the intensity, frequency, and duration of the sound; and context in which the sound is received. In other words, production of sound is a necessary, but not sufficient, condition for an environmental impact. At a workshop on the environmental effects of tidal energy development, experts identified sound produced by turbines as an area of potentially significant impact, but also high uncertainty. The overall objectives of this project are to improve our understanding of the potential acoustic effects of tidal turbines by: (1) Characterizing sources of existing underwater noise; (2) Assessing the effectiveness of monitoring technologies to characterize underwater noise and marine mammal responsiveness to noise; (3) Evaluating the sound profile of an operating tidal turbine; and (4) Studying the effect of turbine sound on surrogate species in a laboratory environment. This study focuses on a specific case study for tidal energy development in Admiralty Inlet, Puget Sound, Washington (USA), but the methodologies and results are applicable to other turbine technologies and geographic locations. The project succeeded in achieving the above objectives and, in doing so, substantially contributed to the body of knowledge around the acoustic effects of tidal energy development in several ways: (1) Through collection of data from Admiralty Inlet, established the sources of sound generated by strong currents (mobilizations of sediment and gravel) and determined that low-frequency sound recorded during periods of strong currents is non-propagating pseudo-sound. This helped to advance the debate within the marine and hydrokinetics acoustic community as to whether strong currents produce propagating sound. (2) Analyzed data collected from a tidal turbine operating at the European Marine Energy Center to develop a profile of turbine sound and developed a framework to evaluate the acoustic effects of deploying similar devices in other locations. This framework has been applied to Public Utility District No. 1 of Snohomish Country's demonstration project in Admiralty Inlet to inform postinstallation acoustic and marine mammal monitoring plans. (3) Demonstrated passive acoustic techniques to characterize the ambient noise environment at tidal energy sites (fixed, long-term observations recommended) and characterize the sound from anthropogenic sources (drifting, short-term observations recommended). (4) Demonstrated the utility and limitations of instrumentation, including bottom mounted instrumentation packages, infrared cameras, and vessel monitoring systems. In doing so, also demonstrated how this type of comprehensive information is needed to interpret observations from each instrument (e.g., hydrophone data can be combined with vessel tracking data to evaluate the contribution of vessel sound to ambient noise). (5) Conducted a study that suggests harbor porpoise in Admiralty Inlet may be habituated to high levels of ambient noise due to omnipresent vessel traffic. The inability to detect behavioral changes associated with a high intensity source of opportunity (passenger ferry) has informed the approach for post-installation marine mammal monitoring. (6) Conducted laboratory exposure experiments of juvenile Chinook salmon and showed that exposure to a worse than worst case acoustic dose of turbine sound does not result in changes to hearing thresholds or biologically significant tissue damage. Collectively, this means that Chinook salmon may be at a relatively low risk of injury from sound produced by tidal turbines located in or near their migration path. In achieving these accomplishments, the project has significantly advanced the District's goals of developing a demonstration-scale tidal energy proj

  6. Tidally averaged circulation in Puget Sound sub-basins: Comparison of historical data, analytical model, and numerical model

    SciTech Connect (OSTI)

    Khangaonkar, Tarang; Yang, Zhaoqing; Kim, Tae Yun; Roberts, Mindy

    2011-07-20T23:59:59.000Z

    Through extensive field data collection and analysis efforts conducted since the 1950s, researchers have established an understanding of the characteristic features of circulation in Puget Sound. The pattern ranges from the classic fjordal behavior in some basins, with shallow brackish outflow and compensating inflow immediately below, to the typical two-layer flow observed in many partially mixed estuaries with saline inflow at depth. An attempt at reproducing this behavior by fitting an analytical formulation to past data is presented, followed by the application of a three-dimensional circulation and transport numerical model. The analytical treatment helped identify key physical processes and parameters, but quickly reconfirmed that response is complex and would require site-specific parameterization to include effects of sills and interconnected basins. The numerical model of Puget Sound, developed using unstructured-grid finite volume method, allowed resolution of the sub-basin geometric features, including presence of major islands, and site-specific strong advective vertical mixing created by bathymetry and multiple sills. The model was calibrated using available recent short-term oceanographic time series data sets from different parts of the Puget Sound basin. The results are compared against (1) recent velocity and salinity data collected in Puget Sound from 2006 and (2) a composite data set from previously analyzed historical records, mostly from the 1970s. The results highlight the ability of the model to reproduce velocity and salinity profile characteristics, their variations among Puget Sound subbasins, and tidally averaged circulation. Sensitivity of residual circulation to variations in freshwater inflow and resulting salinity gradient in fjordal sub-basins of Puget Sound is examined.

  7. Measurements of Turbulence at Two Tidal Energy Sites in Puget Sound, WA

    SciTech Connect (OSTI)

    Thomson, Jim; Polagye, Brian; Durgesh, Vibhav; Richmond, Marshall C.

    2012-06-05T23:59:59.000Z

    Field measurements of turbulence are pre- sented from two sites in Puget Sound, WA (USA) that are proposed for electrical power generation using tidal current turbines. Rapidly sampled data from multiple acoustic Doppler instruments are analyzed to obtain statistical mea- sures of fluctuations in both the magnitude and direction of the tidal currents. The resulting turbulence intensities (i.e., the turbulent velocity fluctuations normalized by the harmonic tidal currents) are typically 10% at the hub- heights (i.e., the relevant depth bin) of the proposed turbines. Length and time scales of the turbulence are also analyzed. Large-scale, anisotropic eddies dominate the energy spectra, which may be the result of proximity to headlands at each site. At small scales, an isotropic turbulent cascade is observed and used to estimate the dissipation rate of turbulent kinetic energy. Data quality and sampling parameters are discussed, with an emphasis on the removal of Doppler noise from turbulence statistics.

  8. Puget Sound Tidal Energy In-Water Testing and Development Project Final Technical Report

    SciTech Connect (OSTI)

    Craig W. Collar

    2012-11-16T23:59:59.000Z

    Tidal energy represents potential for the generation of renewable, emission free, environmentally benign, and cost effective energy from tidal flows. A successful tidal energy demonstration project in Puget Sound, Washington may enable significant commercial development resulting in important benefits for the northwest region and the nation. This project promoted the United States Department of Energy�s Wind and Hydropower Technologies Program�s goals of advancing the commercial viability, cost-competitiveness, and market acceptance of marine hydrokinetic systems. The objective of the Puget Sound Tidal Energy Demonstration Project is to conduct in-water testing and evaluation of tidal energy technology as a first step toward potential construction of a commercial-scale tidal energy power plant. The specific goal of the project phase covered by this award was to conduct all activities necessary to complete engineering design and obtain construction approvals for a pilot demonstration plant in the Admiralty Inlet region of the Puget Sound. Public Utility District No. 1 of Snohomish County (The District) accomplished the objectives of this award through four tasks: Detailed Admiralty Inlet Site Studies, Plant Design and Construction Planning, Environmental and Regulatory Activities, and Management and Reporting. Pre-Installation studies completed under this award provided invaluable data used for site selection, environmental evaluation and permitting, plant design, and construction planning. However, these data gathering efforts are not only important to the Admiralty Inlet pilot project. Lessons learned, in particular environmental data gathering methods, can be applied to future tidal energy projects in the United States and other parts of the world. The District collaborated extensively with project stakeholders to complete the tasks for this award. This included Federal, State, and local government agencies, tribal governments, environmental groups, and others. All required permit and license applications were completed and submitted under this award, including a Final License Application for a pilot hydrokinetic license from the Federal Energy Regulatory Commission. The tasks described above have brought the project through all necessary requirements to construct a tidal pilot project in Admiralty Inlet with the exception of final permit and license approvals, and the selection of a general contractor to perform project construction.

  9. Dissolved metal contamination in the East RiverLong Island sound system: potential biological effects

    E-Print Network [OSTI]

    Johnsen, Sönke

    in the United States. The ER­WLIS region receives treated sewage from 18 wastewater treatment plants in New YorkDissolved metal contamination in the East River­Long Island sound system: potential biological sewage, and to assess its possible biological impact on local waters. The East River­Long Island Sound

  10. MHK Projects/Treat Island Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:LandownersLuther, Oklahoma:Energy InformationSEAREV Pays deTreat Island

  11. Broadband Acoustic Environment at a Tidal Energy Site in Puget Sound

    SciTech Connect (OSTI)

    Xu, Jinshan; Deng, Zhiqun; Martinez, Jayson J.; Carlson, Thomas J.; Myers, Joshua R.; Weiland, Mark A.

    2012-04-04T23:59:59.000Z

    Admiralty Inlet has been selected as a potential tidal energy site. It is located near shipping lanes, is a highly variable acoustic environment, and is frequented by the endangered southern resident killer whale (SRKW). Resolving environmental impacts is the first step to receiving approval to deploy tidal turbines. Several monitoring technologies are being considered to determine the presence of SRKW near the turbines. Broadband noise level measurements are critical for determining design and operational specifications of these technologies. Acoustic environment data at the proposed site was acquired at different depths using a cabled vertical line array from three different cruises during high tidal period in February, May, and June 2011. The ambient noise level decreases approximately 25 dB re 1 ?Pa per octave from frequency ranges of 1 kHz to 70 kHz, and increases approximately 20 dB re 1 ?Pa per octave for the frequency from 70 kHz to 200 kHz. The difference of noise pressure levels in different months varies from 10 to 30 dB re 1 ?Pa for the frequency range below 70 kHz. Commercial shipping and ferry vessel traffic were found to be the most significant contributors to sound pressure levels for the frequency range from 100 Hz to 70 kHz, and the variation could be as high as 30 dB re 1 ?Pa. These noise level measurements provide the basic information for designing and evaluating both active and passive monitoring systems proposed for deploying and operating for tidal power generation alert system.

  12. Changes in Beachface Bed Elevation over a Tidal Cycle on Santa Rosa Island, Florida and Matagorda, Texas

    E-Print Network [OSTI]

    Barrett, Gemma

    2009-06-09T23:59:59.000Z

    . Data from one ultrasonic sensor was chosen to compile for the tidal cycle. Sonic 4 was chosen because it was located midway through the swash zone and positioned on station 4 of the 8 transect stations which showed the best data for rising, high tide... CHANGES IN BEACHFACE BED ELEVATION OVER A TIDAL CYCLE ON SANTA ROSA ISLAND, FLORIDA AND MATAGORDA PENINSULA, TEXAS Major: Environmental Geosciences April 2009 Submitted to the Office of Undergraduate Research Texas A...

  13. Groundwater response to dual tidal fluctuations in a peninsula or an elongated island

    E-Print Network [OSTI]

    Zhan, Hongbin

    1 , Hongbin Zhan2,3, *, and Zhonghua Tang1 1 School of Environmental Studies, China University of the tidal fluctuations. This is called quasi-steady state condition *Correspondence to: Hongbin Zhan

  14. MHK Projects/Long Island Sound Tidal Energy Project | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformationCygnet < MHKSound,IrontonKrotzLeancon

  15. ISLANDER

    Energy Science and Technology Software Center (OSTI)

    003251WKSTN00 Genomic Island Identification Software v 1.0  http://bioinformatics.sandia.gov/software 

  16. Marsh, mudflat and tidal creek assessment Cumberland Island National Seashore. Kings Bay Environmental Monitoring Program cumberland island national seashore. Technical report

    SciTech Connect (OSTI)

    Nakashima, L.D.

    1991-01-01T23:59:59.000Z

    The project was designed to determine whether backbarrier dredging for the Kings Bay Naval Base is affecting marsh habitat sustainability on Cumberland Island. Research was predicated on the hypothesis that if the operation is indeed exerting an influence on Cumberland Island, it will most likely be first perceived in the effect it has on the rates of supply and delivery of sediments to the marshes and mudflats. The authors located three comparable sites, which experience a different level of exposure to the effects of dredging. Second, we initiated a time-series of marsh/mudflat sedimentation measurements, which are expected to be continued in future years. Finally, we compared six different methods for monitoring sedimentation, all of which are currently in practice.

  17. The 345 kV underground/underwater Long Island Sound cable project

    SciTech Connect (OSTI)

    Grzan, J.; Hahn, E.I. (New York Power Authority, White Plains, NY (United States)); Casalaina, R.V.; Kansog, J.O.C. (Ebasco Services Inc., Lyndhurst, NJ (United States))

    1993-07-01T23:59:59.000Z

    A high voltage underground/underwater cable system was installed to increase the transmission capacity from the mainland of New York to Long Island. In terms of weight and diameter, the self-contained, fluid-filled (SCFF) cable used for the underwater portion of the project is the largest underwater cable in the world. The use of high-pressure, fluid-filled (HPFF) pipe-type cable on the land portion represents the largest application of paper-polypropylene-paper (PPP) insulated cable in the United States. State-of-the-art technologies were implemented in the use of fiber optic cables for relay protection and SCADA/RTU, temperature monitoring and leak detection systems, SF[sub 6] gas-insulated substations, and underwater cable laying and embedment techniques. This paper discusses the design and installation of a 750 MVA, 43 km (26.6 mi), 345 kV underground/underwater electric transmission system installed by the New York Power Authority (NYPA).

  18. Tidal power

    SciTech Connect (OSTI)

    Hammons, T.J. (Glasgow Univ., Scotland (United Kingdom))

    1993-03-01T23:59:59.000Z

    The paper reviews the physics of tidal power considering gravitational effects of moon and sun; semidiurnal, diurnal, and mixed tides; and major periodic components that affect the tidal range. Shelving, funneling, reflection, and resonance phenomena that have a significant effect on tidal range are also discussed. The paper then examines tidal energy resource for principal developments estimated from parametric modeling in Europe and worldwide. Basic parameters that govern the design of tidal power schemes in terms of mean tidal range and surface area of the enclosed basin are identified. While energy extracted is proportional to the tidal amplitude squared, requisite sluicing are is proportional to the square root of the tidal amplitude. Sites with large tidal amplitudes are therefore best suited for tidal power developments, whereas sites with low tidal amplitudes have sluicing that may be prohibitive. It is shown that 48% of the European tidal resource is in the United Kingdom, 42% in France and 8% in Ireland, other countries having negligible potential. Worldwide tidal resource is identified. Tidal barrage design and construction using caissons is examined, as are alternative operating modes (single-action generation, outflow generation, flood generation, two-way generation, twin basin generation, pumping, etc), development trends and possibilities, generation cost at the barrage boundary, sensitivity to discount rates, general economics, and markets. Environmental effects, and institutional constraints to the development of tidal barrage schemes are also discussed.

  19. Overland Tidal Power Generation Using Modular Tidal Prism

    SciTech Connect (OSTI)

    Khangaonkar, Tarang; Yang, Zhaoqing; Geerlofs, Simon H.; Copping, Andrea

    2010-03-01T23:59:59.000Z

    Naturally occurring sites with sufficient kinetic energy suitable for tidal power generation with sustained currents > 1 to 2 m/s are relatively rare. Yet sites with greater than 3 to 4 m of tidal range are relatively common around the U.S. coastline. Tidal potential does exist along the shoreline but is mostly distributed, and requires an approach which allows trapping and collection to also be conducted in a distributed manner. In this paper we examine the feasibility of generating sustainable tidal power using multiple nearshore tidal energy collection units and present the Modular Tidal Prism (MTP) basin concept. The proposed approach utilizes available tidal potential by conversion into tidal kinetic energy through cyclic expansion and drainage from shallow modular manufactured overland tidal prisms. A preliminary design and configuration of the modular tidal prism basin including inlet channel configuration and basin dimensions was developed. The unique design was shown to sustain momentum in the penstocks during flooding as well as ebbing tidal cycles. The unstructured-grid finite volume coastal ocean model (FVCOM) was used to subject the proposed design to a number of sensitivity tests and to optimize the size, shape and configuration of MTP basin for peak power generation capacity. The results show that an artificial modular basin with a reasonable footprint (? 300 acres) has the potential to generate 10 to 20 kw average energy through the operation of a small turbine located near the basin outlet. The potential of generating a total of 500 kw to 1 MW of power through a 20 to 40 MTP basin tidal power farms distributed along the coastline of Puget Sound, Washington, is explored.

  20. Tidal Energy Research

    SciTech Connect (OSTI)

    Stelzenmuller, Nickolas [Univ of Washington; Aliseda, Alberto [Univ of Washington; Palodichuk, Michael [Univ of Washington; Polagye, Brian [Univ of Washington; Thomson, James [Univ of Washington; Chime, Arshiya [Univ of Washington; Malte, Philip [Univ of washington

    2014-03-31T23:59:59.000Z

    This technical report contains results on the following topics: 1) Testing and analysis of sub-scale hydro-kinetic turbines in a flume, including the design and fabrication of the instrumented turbines. 2) Field measurements and analysis of the tidal energy resource and at a site in northern Puget Sound, that is being examined for turbine installation. 3) Conceptual design and performance analysis of hydro-kinetic turbines operating at high blockage ratio, for use for power generation and flow control in open channel flows.

  1. Assessment of Strike of Adult Killer Whales by an OpenHydro Tidal Turbine Blade

    SciTech Connect (OSTI)

    Carlson, Thomas J.; Elster, Jennifer L.; Jones, Mark E.; Watson, Bruce E.; Copping, Andrea E.; Watkins, Michael L.; Jepsen, Richard A.; Metzinger, Kurt

    2012-02-01T23:59:59.000Z

    Report to DOE on an analysis to determine the effects of a potential impact to an endangered whale from tidal turbines proposed for deployment in Puget Sound.

  2. A Hydrological Model of Harrington Sound, Bermuda and its Surrounding Cave Systems

    E-Print Network [OSTI]

    Stoffer, Jonathan L

    2013-04-23T23:59:59.000Z

    delay and dampening the tidal range to 35% of those on the coast. By comparing the tidal amplitude and surface area of Harrington Sound, tidal exchange can be determined. Past research has shown Flatts Inlet only supplies the Sound with about half of its...

  3. Interactions Between Tidal Flows and Ooid Shoals, Northern Bahamas

    E-Print Network [OSTI]

    Reeder, Stacy Lynn; Rankey, Gene C.

    2008-03-01T23:59:59.000Z

    active sand waves and ripples. Towards the platform margin, tidal currents pass through narrow inlets. The main inlet opening oceanward (NW) of the shoal stretches between two Pleistocene bedrock islands, connected by a bedrock high that extends... include both flood and ebb tidal deltas, with generally lobate forms, convex away from the islands, and with endpoints at the inlets. Although the inner portions of these lobes are mainly seagrass-stabilized muddy peloidal and skeletal sands with local...

  4. Acoustic Monitoring of Beluga Whale Interactions with Cook Inlet Tidal Energy Project

    SciTech Connect (OSTI)

    Worthington, Monty [Project Director - AK] [Project Director - AK

    2014-02-05T23:59:59.000Z

    Cook Inlet, Alaska is home to some of the greatest tidal energy resources in the U.S., as well as an endangered population of beluga whales (Delphinapterus leucas). Successfully permitting and operating a tidal power project in Cook Inlet requires a biological assessment of the potential and realized effects of the physical presence and sound footprint of tidal turbines on the distribution, relative abundance, and behavior of Cook Inlet beluga whales. ORPC Alaska, working with the Project Team—LGL Alaska Research Associates, University of Alaska Anchorage, TerraSond, and Greeneridge Science—undertook the following U.S. Department of Energy (DOE) study to characterize beluga whales in Cook Inlet – Acoustic Monitoring of Beluga Whale Interactions with the Cook Inlet Tidal Energy Project (Project). ORPC Alaska, LLC, is a wholly-owned subsidiary of Ocean Renewable Power Company, LLC, (collectively, ORPC). ORPC is a global leader in the development of hydrokinetic power systems and eco-conscious projects that harness the power of ocean and river currents to create clean, predictable renewable energy. ORPC is developing a tidal energy demonstration project in Cook Inlet at East Foreland where ORPC has a Federal Energy Regulatory Commission (FERC) preliminary permit (P-13821). The Project collected baseline data to characterize pre-deployment patterns of marine mammal distribution, relative abundance, and behavior in ORPC’s proposed deployment area at East Foreland. ORPC also completed work near Fire Island where ORPC held a FERC preliminary permit (P-12679) until March 6, 2013. Passive hydroacoustic devices (previously utilized with bowhead whales in the Beaufort Sea) were adapted for study of beluga whales to determine the relative abundance of beluga whale vocalizations within the proposed deployment areas. Hydroacoustic data collected during the Project were used to characterize the ambient acoustic environment of the project site pre-deployment to inform the FERC pilot project process. The Project compared results obtained from this method to results obtained from other passive hydrophone technologies and to visual observation techniques performed simultaneously. This Final Report makes recommendations on the best practice for future data collection, for ORPC’s work in Cook Inlet specifically, and for tidal power projects in general. This Project developed a marine mammal study design and compared technologies for hydroacoustic and visual data collection with potential for broad application to future tidal and hydrokinetic projects in other geographic areas. The data collected for this Project will support the environmental assessment of future Cook Inlet tidal energy projects, including ORPC’s East Foreland Tidal Energy Project and any tidal energy developments at Fire Island. The Project’s rigorous assessment of technology and methodologies will be invaluable to the hydrokinetic industry for developing projects in an environmentally sound and sustainable way for areas with high marine mammal activity or endangered populations. By combining several different sampling methods this Project will also contribute to the future preparation of a comprehensive biological assessment of ORPC’s projects in Cook Inlet.

  5. toProtectandRestorePugetSound Final Report to the Puget Sound Partnership July 30, 2009 Grant #200806

    E-Print Network [OSTI]

    Carrington, Emily

    1 Citizen Science Harnessing toProtectandRestorePugetSound Final Report to the Puget Sound;2 Harnessing Citizen Science to Protect and Restore Puget Sound Cover photo: Lopez Island's community salmon Department of Ecology Susan Bullerdick, COSEE-Ocean Learning Communities Doug Myers, People for Puget Sound

  6. Environmental Effects of Sediment Transport Alteration and Impacts on Protected Species: Edgartown Tidal Energy Project

    SciTech Connect (OSTI)

    Barrett, Stephen B.; Schlezinger, David, Ph.D; Cowles, Geoff, Ph.D; Hughes, Patricia; Samimy; Roland, I.; and Terray, E, Ph.D.

    2012-12-29T23:59:59.000Z

    The Islands of Martha�¢����s Vineyard and Nantucket are separated from the Massachusetts mainland by Vineyard and Nantucket Sounds; water between the two islands flows through Muskeget Channel. The towns of Edgartown (on Martha�¢����s Vineyard) and Nantucket recognize that they are vulnerable to power supply interruptions due to their position at the end of the power grid, and due to sea level rise and other consequences of climate change. The tidal energy flowing through Muskeget Channel has been identified by the Electric Power Research Institute as the strongest tidal resource in Massachusetts waters. The Town of Edgartown proposes to develop an initial 5 MW (nameplate) tidal energy project in Muskeget Channel. The project will consist of 14 tidal turbines with 13 providing electricity to Edgartown and one operated by the University of Massachusetts at Dartmouth for research and development. Each turbine will be 90 feet long and 50 feet high. The electricity will be brought to shore by a submarine cable buried 8 feet below the seabed surface which will landfall in Edgartown either on Chappaquiddack or at Katama. Muskeget Channel is located between Martha�¢����s Vineyard and Nantucket. Its depth ranges between 40 and 160 feet in the deepest portion. It has strong currents where water is transferred between Nantucket Sound and the Atlantic Ocean continental shelf to the south. This makes it a treacherous passage for navigation. Current users of the channel are commercial and recreational fishing, and cruising boats. The US Coast Guard has indicated that the largest vessel passing through the channel is a commercial scallop dragger with a draft of about 10 feet. The tidal resource in the channel has been measured by the University of Massachusetts-Dartmouth and the peak velocity flow is approximately 5 knots. The technology proposed is the helical Gorlov-type turbine positioned with a horizontal axis that is positively buoyant in the water column and held down by anchors. This is the same technology proposed by Ocean Renewable Power Company in the Western Passage and Cobscook Bay near Eastport Maine. The blades rotate in two directions capturing the tides energy both during flood and ebb tides. The turbines will be anchored to the bottom and suspended in the water column. Initial depth of the turbines is expected to be about 25 feet below the surface to avoid impacting navigation while also capturing the strongest currents. The Town of Edgartown was initially granted a Preliminary Permit by the Federal Energy Regulatory Commission (FERC) on March 1, 2008, and has recently received a second permit valid through August 2014. The Preliminary Permit gives Edgartown the exclusive right to apply for a power generation license for power generated from the hydrokinetic energy in the water flowing in this area. Edgartown filed a Draft Pilot License Application with FERC on February 1, 2010 and an Expanded Environmental Notification Form with the Massachusetts Environmental Policy Act (MEPA) Office at the same time. It expects to file a Final License Application in late 2013. Harris Miller Miller & Hanson (HMMH) of Burlington Massachusetts is acting as the Project Manager for the Town of Edgartown and collaborating with other partners of the project including the University of Massachusetts - Dartmouth's Marine Renewable Energy Center and the Massachusetts Clean Energy Center. HMMH was awarded a grant under the Department of Energy's Advanced Water Program to conduct marine science and hydrokinetic site-specific environmental studies for projects actively seeking a FERC License. HMMH, on behalf of the Town, is managing this comprehensive study of the marine environment in Muskeget Channel and potential impacts of the tidal project on indicator species and habitats. The University of Massachusetts School of Marine Science and Technology (SMAST) conducted oceanographic studies of tidal currents, tide level, benthic habit

  7. Tidal Wetlands Regulations (Connecticut)

    Broader source: Energy.gov [DOE]

    Most activities occurring in or near tidal wetlands are regulated, and this section contains information on such activities and required permit applications for proposed activities. Applications...

  8. Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal...

    Open Energy Info (EERE)

    Test Centre, Jump to: navigation, search 1 Retrieved from "http:en.openei.orgwindex.php?titleClarenceStraitTidalEnergyProject,TenaxEnergyTropicalTidalTestCentre,&o...

  9. Temporal Variation in Fish Communities Off Santa Cruz Island, California

    E-Print Network [OSTI]

    Larson, Ralph

    2008-01-01T23:59:59.000Z

    at sub-tidal reefs and kelp beds at Santa Cruz Island in theand/or by the loss of giant kelp, which occurs during warm-diminishing the extent of giant kelp beds. Student Michelle

  10. Modeling In-stream Tidal Energy Extraction and Its Potential Environmental Impacts

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea; Geerlofs, Simon H.

    2014-09-30T23:59:59.000Z

    In recent years, there has been growing interest in harnessing in-stream tidal energy in response to concerns of increasing energy demand and to mitigate climate change impacts. While many studies have been conducted to assess and map tidal energy resources, efforts for quantifying the associated potential environmental impacts have been limited. This paper presents the development of a tidal turbine module within a three-dimensional unstructured-grid coastal ocean model and its application for assessing the potential environmental impacts associated with tidal energy extraction. The model is used to investigate in-stream tidal energy extraction and associated impacts on estuarine hydrodynamic and biological processes in a tidally dominant estuary. A series of numerical experiments with varying numbers and configurations of turbines installed in an idealized estuary were carried out to assess the changes in the hydrodynamics and biological processes due to tidal energy extraction. Model results indicated that a large number of turbines are required to extract the maximum tidal energy and cause significant reduction of the volume flux. Preliminary model results also indicate that extraction of tidal energy increases vertical mixing and decreases flushing rate in a stratified estuary. The tidal turbine model was applied to simulate tidal energy extraction in Puget Sound, a large fjord-like estuary in the Pacific Northwest coast.

  11. Textural criteria for the discrimination of water-laid and wind-laid barrier island sands: a North Padre Island, Texas example

    E-Print Network [OSTI]

    Cunningham, David

    1985-01-01T23:59:59.000Z

    -Laid Barrier Island Sands: A North Padre Island, Texas Example (August 1985) David Cunningham, B. S. ; The University of Texas at Austin Chairman of Advisory Committee: Dr. James M. Mazzullo The grain size and grain shape characteristics of 63, 200 quartz... sand grains were analyzed from 158 samples systematically collected along three transects across North Padre Island. Sampled subenviron- ments included the forebeach, backbeach, foredune ridge, eolian flat, back-island dunes, and wind-tidal flats...

  12. Modeling of In-stream Tidal Energy Development and its Potential Effects in Tacoma Narrows, Washington, USA

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea E.; Geerlofs, Simon H.

    2014-10-01T23:59:59.000Z

    Understanding and providing proactive information on the potential for tidal energy projects to cause changes to the physical system and to key water quality constituents in tidal waters is a necessary and cost-effective means to avoid costly regulatory involvement and late stage surprises in the permitting process. This paper presents a modeling study for evaluating the tidal energy extraction and its potential impacts on the marine environment in a real world site - Tacoma Narrows of Puget Sound, Washington State, USA. An unstructured-grid coastal ocean model, fitted with a module that simulates tidal energy devices, was applied to simulate the tidal energy extracted by different turbine array configurations and the potential effects of the extraction at local and system-wide scales in Tacoma Narrows and South Puget Sound. Model results demonstrated the advantage of an unstructured-grid model for simulating the far-field effects of tidal energy extraction in a large model domain, as well as assessing the near-field effect using a fine grid resolution near the tidal turbines. The outcome shows that a realistic near-term deployment scenario extracts a very small fraction of the total tidal energy in the system and that system wide environmental effects are not likely; however, near-field effects on the flow field and bed shear stress in the area of tidal turbine farm are more likely. Model results also indicate that from a practical standpoint, hydrodynamic or water quality effects are not likely to be the limiting factor for development of large commercial-scale tidal farms. Results indicate that very high numbers of turbines are required to significantly alter the tidal system; limitations on marine space or other environmental concerns are likely to be reached before reaching these deployment levels. These findings show that important information obtained from numerical modeling can be used to inform regulatory and policy processes for tidal energy development.

  13. Quantifying Turbulence for Tidal Power Applications

    SciTech Connect (OSTI)

    Thomson, Jim; Richmond, Marshall C.; Polagye, Brian; Durgesh, Vibhav

    2010-08-01T23:59:59.000Z

    Using newly collected data from a tidal power site in Puget Sound, WA, metrics for turbulence quantification are assessed and discussed. The quality of raw ping Acoustic Doppler Current Profiler (ADCP) data for turbulence studies is evaluated against Acoustic Doppler Velocimeter (ADV) data at a point. Removal of Doppler noise from the raw ping data is shown to be a crucial step in turbulence quantification. Excluding periods of slack tide, the turbulent intensity estimates at a height of 4.6 m above the seabed are 8% and 11% from the ADCP and ADV, respectively. Estimates of the turbulent dissipation rate are more variable, from 10e-3 to 10e-1 W/m^3. An example analysis of coherent Turbulent Kinetic Energy (TKE) is presented.

  14. Sandia National Laboratories: tidal energy resource assessment

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

    resource assessment Tidal Energy Resource Assessment in the East River Tidal Strait, New York On April 1, 2014, in Energy, News, News & Events, Partnership, Renewable Energy, Water...

  15. Resonant Oscillations and Tidal Heating in Coalescing Binary Neutron Stars

    E-Print Network [OSTI]

    Dong Lai

    1994-04-25T23:59:59.000Z

    Tidal interaction in a coalescing neutron star binary can resonantly excite the g-mode oscillations of the neutron star when the frequency of the tidal driving force equals the intrinsic g-mode frequencies. We study the g-mode oscillations of cold neutron stars using recent microscopic nuclear equations of state, where we determine self-consistently the sound speed and Brunt-V\\"ais\\"al\\"a frequency in the nuclear liquid core. The properties of the g-modes associated with the stable stratification of the core depend sensitively on the pressure-density relation as well as the symmetry energy of the dense nuclear matter. The frequencies of the first ten g-modes lie approximately in the range of $10-100$ Hz. Resonant excitations of these g-modes during the last few minutes of the binary coalescence result in energy transfer and angular momentum transfer from the binary orbit to the neutron star. The angular momentum transfer is possible because a dynamical tidal lag develops even in the absence of fluid viscosity. However, since the coupling between the g-mode and the tidal potential is rather weak, the amount of energy transfer during a resonance and the induced orbital phase error are very small. Resonant excitations of the g-modes play an important role in tidal heating of binary neutron stars. Without the resonances, viscous dissipation is effective only when the stars are close to contact. The resonant oscillations result in dissipation at much larger orbital separation. The actual amount of tidal heating depends on the viscosity of the neutron star. Using the microscopic viscosity, we find that the binary neutron stars are heated to a temperature $\\sim 10^8$ K before they come into contact.

  16. Verdant-Roosevelt Island Tidal Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTri Global EnergyUtility Rate HomeVela Jump to:I Wind Farm Jump

  17. Chemical contamination of harbor-seal pups in Puget Sound. Puget Sound Estuary Program

    SciTech Connect (OSTI)

    Calambokidis, J.; Steiger, G.H.; Lowenstine, L.J.; Becker, D.S.

    1991-09-01T23:59:59.000Z

    Dead newborn harbor seals were collected from Smith Island in the Strait of Juan de Fuca and from Gertrude Island in southern Puget Sound. A variety of chemical contaminants were measured in different kinds of tissue from seven harbor seal pups from each location. In addition to measurements of chemical concentrations, various tissues were also evaluated microscopically for histopathological abnormalities. Finally, two methods for determining the concentrations of PCBs and DDE in blubber tissues were compared. Concentrations of PCBs, lead and silver were significantly higher in the seals from Gertrude Island than those from Smith Island. However, the concentrations of PCBs in seal pups from both locations have declined significantly since testing began in 1972.

  18. Resonant oscillations and tidal heating in coalescing binary neutron stars

    E-Print Network [OSTI]

    Lai, D

    1994-01-01T23:59:59.000Z

    Tidal interaction in a coalescing neutron star binary can resonantly excite the g-mode oscillations of the neutron star when the frequency of the tidal driving force equals the intrinsic g-mode frequencies. We study the g-mode oscillations of cold neutron stars using recent microscopic nuclear equations of state, where we determine self-consistently the sound speed and Brunt-V\\"ais\\"al\\"a frequency in the nuclear liquid core. The properties of the g-modes associated with the stable stratification of the core depend sensitively on the pressure-density relation as well as the symmetry energy of the dense nuclear matter. The frequencies of the first ten g-modes lie approximately in the range of 10-100 Hz. Resonant excitations of these g-modes during the last few minutes of the binary coalescence result in energy transfer and angular momentum transfer from the binary orbit to the neutron star. The angular momentum transfer is possible because a dynamical tidal lag develops even in the absence of fluid viscosity. ...

  19. Variations of net ecosystem CO2 exchange in a tidal inundated wetland: Coupling MODIS and towerbased fluxes

    E-Print Network [OSTI]

    Chen, Jiquan

    .e., biomass), nutrient availability and use, and species composition in coastal Chongming Island, Shanghai, but gradual changes of water level can play an important role in deter- mining the net ecosystem CO2 exchange multiple towers to detect the changes along the tidal gradient, but the high cost and maintenance hinder

  20. Tidal inlet processes and deposits along a low energy coastline: easter Barataria Bight, Louisiana

    SciTech Connect (OSTI)

    Moslow, T.F.; Levin, D.R.

    1985-01-01T23:59:59.000Z

    Historical, seismic and vibracore data were used to determine the geologic framework of sand deposits along the predominantly muddy coastline of eastern Barataria Bight, Louisiana. Three inlet types with distinct sand body geometries and morphologies were identified and are found 1) at flanking barrier island systems spread laterally across the front of interdistributary bays; 2) in old distributary channels; 3) at overwash breaches; or 4) combination of these. Barataria Bight, a sheltered barrier island shoreline embayment with limited sand supply, minimal tidal range (36 cm) and low wave energies (30 cm) can be used to show examples of each inlet type. Barataria Pass and Quatre Bayou Pass are inlets located in old distributary channels. However, Barataria Pass has also been affected by construction between barrier islands. Pass Ronquille is located where the coastline has transgressed a low area in the delta plain. This breach is situated in a hydraulically efficient avenue between the Gulf and Bay Long behind it. Pass Abel is a combination of a low-profile barrier breach and the reoccupation of an old distributary channel. Shelf and shoreline sands are reworked from abandoned deltaic distributaries and headlands. Inner shelf sands are concentrated in thick (10 m) shore-normal relict distributary channels with fine grained cross-bedded and ripple laminated sand overlain by burrowed shelf muds. Shoreface sand deposits occur as 2-3 m thick, fine-grained, coarsening upward and burrowed ebb-tidal delta sequences and shore-parallel relict tidal inlet channels filled through lateral accretion.

  1. Tidally-induced thermonuclear Supernovae

    E-Print Network [OSTI]

    S. Rosswog; E. Ramirez-Ruiz; W. R. Hix

    2008-11-13T23:59:59.000Z

    We discuss the results of 3D simulations of tidal disruptions of white dwarfs by moderate-mass black holes as they may exist in the cores of globular clusters or dwarf galaxies. Our simulations follow self-consistently the hydrodynamic and nuclear evolution from the initial parabolic orbit over the disruption to the build-up of an accretion disk around the black hole. For strong enough encounters (pericentre distances smaller than about 1/3 of the tidal radius) the tidal compression is reversed by a shock and finally results in a thermonuclear explosion. These explosions are not restricted to progenitor masses close to the Chandrasekhar limit, we find exploding examples throughout the whole white dwarf mass range. There is, however, a restriction on the masses of the involved black holes: black holes more massive than $2\\times 10^5$ M$_\\odot$ swallow a typical 0.6 M$_\\odot$ dwarf before their tidal forces can overwhelm the star's self-gravity. Therefore, this mechanism is characteristic for black holes of moderate masses. The material that remains bound to the black hole settles into an accretion disk and produces an X-ray flare close to the Eddington limit of $L_{\\rm Edd} \\simeq 10^{41} {\\rm erg/s} M_{\\rm bh}/1000 M$_\\odot$), typically lasting for a few months. The combination of a peculiar thermonuclear supernova together with an X-ray flare thus whistle-blows the existence of such moderate-mass black holes. The next generation of wide field space-based instruments should be able to detect such events.

  2. Sounds and Space 

    E-Print Network [OSTI]

    Nudds, Matthew

    the account I give (in section 1) of what sounds are and (in section 2) of the role of space in auditory perception....

  3. Sandia National Laboratories: tidal energy converters

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

    marine hydrokinetic (MHK) reference models (RMs) for wave energy converters and tidal, ocean, and river current energy converters. The RMP team includes a partnership between...

  4. Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate-Scale Hydrodynamic Model

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Khangaonkar, Tarang; Labiosa, Rochelle G.; Kim, Taeyun

    2010-11-30T23:59:59.000Z

    The Washington State Department of Ecology contracted with Pacific Northwest National Laboratory to develop an intermediate-scale hydrodynamic and water quality model to study dissolved oxygen and nutrient dynamics in Puget Sound and to help define potential Puget Sound-wide nutrient management strategies and decisions. Specifically, the project is expected to help determine 1) if current and potential future nitrogen loadings from point and non-point sources are significantly impairing water quality at a large scale and 2) what level of nutrient reductions are necessary to reduce or dominate human impacts to dissolved oxygen levels in the sensitive areas. In this study, an intermediate-scale hydrodynamic model of Puget Sound was developed to simulate the hydrodynamics of Puget Sound and the Northwest Straits for the year 2006. The model was constructed using the unstructured Finite Volume Coastal Ocean Model. The overall model grid resolution within Puget Sound in its present configuration is about 880 m. The model was driven by tides, river inflows, and meteorological forcing (wind and net heat flux) and simulated tidal circulations, temperature, and salinity distributions in Puget Sound. The model was validated against observed data of water surface elevation, velocity, temperature, and salinity at various stations within the study domain. Model validation indicated that the model simulates tidal elevations and currents in Puget Sound well and reproduces the general patterns of the temperature and salinity distributions.

  5. Tidal Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldson Ethanol LLCEnergyoThornwood,Tianfu PVOverseeingTidal

  6. Tidal Stream | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldson Ethanol LLCEnergyoThornwood,TianfuTidal Sails AS

  7. Tidal | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin Baxin Hydropower Station Jump to: navigation, searchNewTidal Home

  8. Three-dimensional Modeling of Tidal Hydrodynamics in the San Francisco Estuary

    E-Print Network [OSTI]

    Gross, Edward S.; MacWilliams, Michael L.; Kimmerer, Wim J.

    2009-01-01T23:59:59.000Z

    1993. Tidal residual intertidal mudflat (TRIM) model and itsthe Tidal Residual Intertidal Mudflat (TRIM) model (Casulli

  9. Assessment of Energy Production Potential from Tidal Streams...

    Energy Savers [EERE]

    Tidal Streams in the United States Assessment of Energy Production Potential from Tidal Streams in the United States The project documented in this report created a national...

  10. Relativistic theory of tidal Love numbers

    E-Print Network [OSTI]

    Taylor Binnington; Eric Poisson

    2009-09-16T23:59:59.000Z

    In Newtonian gravitational theory, a tidal Love number relates the mass multipole moment created by tidal forces on a spherical body to the applied tidal field. The Love number is dimensionless, and it encodes information about the body's internal structure. We present a relativistic theory of Love numbers, which applies to compact bodies with strong internal gravities; the theory extends and completes a recent work by Flanagan and Hinderer, which revealed that the tidal Love number of a neutron star can be measured by Earth-based gravitational-wave detectors. We consider a spherical body deformed by an external tidal field, and provide precise and meaningful definitions for electric-type and magnetic-type Love numbers; and these are computed for polytropic equations of state. The theory applies to black holes as well, and we find that the relativistic Love numbers of a nonrotating black hole are all zero.

  11. NAME: Eelgrass Restoration in Puget Sound LOCATION: Puget Sound, WA

    E-Print Network [OSTI]

    US Army Corps of Engineers

    NAME: Eelgrass Restoration in Puget Sound LOCATION: Puget Sound, WA ACRES: 3,700 acres of subtidal restoration efforts and to contribute to the Puget Sound Partnership's Action Agenda recovery goal of 20% more within the Puget Sound region of the Salish Sea: the Nisqually, Elwha, and Skokomish Rivers. These major

  12. Over-winter oceanographic profiles in Jones Sound, Canadian Arctic Archipelago, November 1961 -June 1962: Temperature, salinity,

    E-Print Network [OSTI]

    Townsend, David W.

    1 Over-winter oceanographic profiles in Jones Sound, Canadian Arctic Archipelago, November 1961 and silicate) were measured at five depths (2, 10, 25, 50 and 80 m) beneath the ice through the winter of 1961 the north side of the sound off Grise Fiord, Ellesmere Island, on 13 May 1962 and 12 May 1969. The over-winter

  13. Tidal Heating of Extra-Solar Planets

    E-Print Network [OSTI]

    Brian Jackson; Richard Greenberg; Rory Barnes

    2008-02-29T23:59:59.000Z

    Extra-solar planets close to their host stars have likely undergone significant tidal evolution since the time of their formation. Tides probably dominated their orbital evolution once the dust and gas had cleared away, and as the orbits evolved there was substantial tidal heating within the planets. The tidal heating history of each planet may have contributed significantly to the thermal budget that governed the planet's physical properties, including its radius, which in many cases may be measured by observing transit events. Typically, tidal heating increases as a planet moves inward toward its star and then decreases as its orbit circularizes. Here we compute the plausible heating histories for several planets with measured radii, using the same tidal parameters for the star and planet that had been shown to reconcile the eccentricity distribution of close-in planets with other extra-solar planets. Several planets are discussed, including for example HD 209458 b, which may have undergone substantial tidal heating during the past billion years, perhaps enough to explain its large measured radius. Our models also show that GJ 876 d may have experienced tremendous heating and is probably not a solid, rocky planet. Theoretical models should include the role of tidal heating, which is large, but time-varying.

  14. Tidal deformations of a spinning compact object

    E-Print Network [OSTI]

    Paolo Pani; Leonardo Gualtieri; Andrea Maselli; Valeria Ferrari

    2015-03-25T23:59:59.000Z

    The deformability of a compact object induced by a perturbing tidal field is encoded in the tidal Love numbers, which depend sensibly on the object's internal structure. These numbers are known only for static, spherically-symmetric objects. As a first step to compute the tidal Love numbers of a spinning compact star, here we extend powerful perturbative techniques to compute the exterior geometry of a spinning object distorted by an axisymmetric tidal field to second order in the angular momentum. The spin of the object introduces couplings between electric and magnetic deformations and new classes of induced Love numbers emerge. For example, a spinning object immersed in a quadrupolar, electric tidal field can acquire some induced mass, spin, quadrupole, octupole and hexadecapole moments to second order in the spin. The deformations are encoded in a set of inhomogeneous differential equations which, remarkably, can be solved analytically in vacuum. We discuss certain subtleties in defining the multipole moments of the central object, which are due to the difficulty in separating the tidal field from the linear response of the object in the solution. By extending the standard procedure to identify the linear response in the static case, we prove analytically that the Love numbers of a Kerr black hole remain zero to second order in the spin. As a by-product, we provide the explicit form for a slowly-rotating, tidally-deformed Kerr black hole to quadratic order in the spin, and discuss its geodesic and geometrical properties.

  15. Island Energy Snapshots

    Office of Energy Efficiency and Renewable Energy (EERE)

    These energy snapshots highlight the energy landscape of islands in the Caribbean and the surrounding area.

  16. Sound modes in holographic superfluids

    SciTech Connect (OSTI)

    Herzog, Christopher P.; Yarom, Amos [Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

    2009-11-15T23:59:59.000Z

    Superfluids support many different types of sound waves. We investigate the relation between the sound waves in a relativistic and a nonrelativistic superfluid by using hydrodynamics to calculate the various sound speeds. Then, using a particular holographic scalar gravity realization of a strongly interacting superfluid, we compute first, second, and fourth sound speeds as a function of the temperature. The relativistic low temperature results for second sound differ from Landau's well known prediction for the nonrelativistic, incompressible case.

  17. A Conceptual Restoration Plan and Tidal Hydrology Assessment for Reconnecting Spring Branch Creek to Suisun Marsh, Solano County, California

    E-Print Network [OSTI]

    Olson, Jessica J.

    2012-01-01T23:59:59.000Z

    tidal wetland below MHLW Table 4.19. Performance IndicatorsPerformance Indicator All Tidal wetlands Tidal wetlands All

  18. 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...

  19. Long Island Sound Testbed and Experiments , Peng Zheng1

    E-Print Network [OSTI]

    Zhou, Shengli

    . The power consumptions of testbed components in different modes were also measured. Experiment data performance of protocols and applications. Instead of large buoy systems, Aqua-TUNE project employs small in this testbed system, including surface nodes employing buoy system, mobile nodes equipped on autonomous

  20. Acoustic Modeling for Aqua Ventus I off Monhegan Island, ME

    SciTech Connect (OSTI)

    Whiting, Jonathan M.; Hanna, Luke A.; DeChello, Nicole L.; Copping, Andrea E.

    2013-10-31T23:59:59.000Z

    The DeepCwind consortium, led by the University of Maine, was awarded funding under the US Department of Energy’s Offshore Wind Advanced Technology Demonstration Program to develop two floating offshore wind turbines in the Gulf of Maine equipped with Goldwind 6 MW direct drive turbines, as the Aqua Ventus I project. The Goldwind turbines have a hub height of 100 m. The turbines will be deployed in Maine State waters, approximately 2.9 miles off Monhegan Island; Monhegan Island is located roughly 10 miles off the coast of Maine. In order to site and permit the offshore turbines, the acoustic output must be evaluated to ensure that the sound will not disturb residents on Monhegan Island, nor input sufficient sound levels into the nearby ocean to disturb marine mammals. This initial assessment of the acoustic output focuses on the sound of the turbines in air by modeling the assumed sound source level, applying a sound propagation model, and taking into account the distance from shore.

  1. Viscoelastic Models of Tidally Heated Exomoons

    E-Print Network [OSTI]

    Dobos, Vera

    2015-01-01T23:59:59.000Z

    Tidal heating of exomoons may play a key role in their habitability, since the elevated temperature can melt the ice on the body even without significant solar radiation. The possibility of life is intensely studied on Solar System moons such as Europa or Enceladus, where the surface ice layer covers tidally heated water ocean. Tidal forces may be even stronger in extrasolar systems, depending on the properties of the moon and its orbit. For studying the tidally heated surface temperature of exomoons, we used a viscoelastic model for the first time. This model is more realistic than the widely used, so-called fixed Q models, because it takes into account the temperature dependency of the tidal heat flux, and the melting of the inner material. With the use of this model we introduced the circumplanetary Tidal Temperate Zone (TTZ), that strongly depends on the orbital period of the moon, and less on its radius. We compared the results with the fixed Q model and investigated the statistical volume of the TTZ usi...

  2. Half Moon Cove Tidal Project. Feasibility report

    SciTech Connect (OSTI)

    Not Available

    1980-11-01T23:59:59.000Z

    The proposed Half Moon Cove Tidal Power Project would be located in a small cove in the northern part of Cobscook Bay in the vicinity of Eastport, Maine. The project would be the first tidal electric power generating plant in the United States of America. The basin impounded by the barrier when full will approximate 1.2 square miles. The average tidal range at Eastport is 18.2 feet. The maximum spring tidal range will be 26.2 feet and the neap tidal range 12.8 feet. The project will be of the single pool-type single effect in which generation takes place on the ebb tide only. Utilizing an average mean tidal range of 18.2 feet the mode of operation enables generation for approximately ten and one-half (10-1/2) hours per day or slightly in excess of five (5) hours per tide. The installed capacity will be 12 MW utilizing 2 to 6 MW units. An axial flow, or Bulb type of turbine was selected for this study.

  3. Tidal Evolution of Rubble Piles

    E-Print Network [OSTI]

    Peter Goldreich; Re'em Sari

    2007-12-04T23:59:59.000Z

    Many small bodies in the solar system are believed to be rubble piles, a collection of smaller elements separated by voids. We propose a model for the structure of a self-gravitating rubble pile. Static friction prevents its elements from sliding relative to each other. Stresses are concentrated around points of contact between individual elements. The effective dimensionless rigidity, $\\tilde\\mu_{rubble}$, is related to that of a monolithic body of similar composition and size, $\\tilde\\mu$ by $\\tilde \\mu_{rubble} \\sim \\tilde \\mu^{1/2} \\epsilon_Y^{-1/2}$, where $\\epsilon_Y \\sim 10^{-2}$ is the yield strain. This represents a reduction in effective rigidity below the maximum radius, $R_{max}\\sim [\\mu\\epsilon_Y/(G\\rho^2)]^{1/2}\\sim 10^3\\km$, at which a rubble pile can exist. Densities derived for binary near-Earth asteroids imply that they are rubble piles. As a consequence, their tidal evolution proceeds $10^3$ to $10^4$ times faster than it would if they were monoliths. This accounts for both the sizes of their semimajor axes and their small orbital eccentricities. We show that our model for the rigidity of rubble piles is compatible with laboratory experiment in sand.

  4. Fitting orbits to tidal streams

    E-Print Network [OSTI]

    James Binney

    2008-02-11T23:59:59.000Z

    Recent years have seen the discovery of many tidal streams through the Galaxy. Relatively straightforward observations of a stream allow one to deduce three phase-space coordinates of an orbit. An algorithm is presented that reconstructs the missing phase-space coordinates from these data. The reconstruction starts from assumed values of the Galactic potential and a distance to one point on the orbit, but with noise-free data the condition that energy be conserved on the orbit enables one to reject incorrect assumptions. The performance of the algorithm is investigated when errors are added to the input data that are comparable to those in published data for the streams of Pal 5. It is found that the algorithm returns distances and proper motions that are accurate to of order one percent, and enables one to reject quite reasonable but incorrect trial potentials. In practical applications it will be important to minimize errors in the input data, and there is considerable scope for doing this.

  5. What Is Sound? Sound is a pressure wave which is

    E-Print Network [OSTI]

    Toronto, University of

    What Is Sound? Sound is a pressure wave which is created by a vibrating object. This vibrations set the medium. Since the particles are moving in parallel direction to the wave movement, the sound wave of a sine wave (C~crests, R~troughs) The speed of a sound pressure wave in air is 331.5+0.6Tc m/s , Tc

  6. The Biogeography of Globally Threatened Seabirds and Island Conservation Opportunities

    E-Print Network [OSTI]

    Spatz, Dena R.

    2013-01-01T23:59:59.000Z

    Phoenix Islands Huksan Do Persian Gulf Persian Gulf MaltaMaltaIslands Malta Islands Malta Islands Malta Islands Malta

  7. Journal of Sound and Vibration ] (

    E-Print Network [OSTI]

    Ge, Shuzhi Sam

    the ocean surface to the sea floor. With the trend towards oil and gas exploration in deeper watersJOURNAL OF SOUND AND VIBRATION Journal of Sound and Vibration ] (

  8. Arctic ice islands

    SciTech Connect (OSTI)

    Sackinger, W.M.; Jeffries, M.O.; Lu, M.C.; Li, F.C.

    1988-01-01T23:59:59.000Z

    The development of offshore oil and gas resources in the Arctic waters of Alaska requires offshore structures which successfully resist the lateral forces due to moving, drifting ice. Ice islands are floating, a tabular icebergs, up to 60 meters thick, of solid ice throughout their thickness. The ice islands are thus regarded as the strongest ice features in the Arctic; fixed offshore structures which can directly withstand the impact of ice islands are possible but in some locations may be so expensive as to make oilfield development uneconomic. The resolution of the ice island problem requires two research steps: (1) calculation of the probability of interaction between an ice island and an offshore structure in a given region; and (2) if the probability if sufficiently large, then the study of possible interactions between ice island and structure, to discover mitigative measures to deal with the moving ice island. The ice island research conducted during the 1983-1988 interval, which is summarized in this report, was concerned with the first step. Monte Carlo simulations of ice island generation and movement suggest that ice island lifetimes range from 0 to 70 years, and that 85% of the lifetimes are less then 35 years. The simulation shows a mean value of 18 ice islands present at any time in the Arctic Ocean, with a 90% probability of less than 30 ice islands. At this time, approximately 34 ice islands are known, from observations, to exist in the Arctic Ocean, not including the 10-meter thick class of ice islands. Return interval plots from the simulation show that coastal zones of the Beaufort and Chukchi Seas, already leased for oil development, have ice island recurrences of 10 to 100 years. This implies that the ice island hazard must be considered thoroughly, and appropriate safety measures adopted, when offshore oil production plans are formulated for the Alaskan Arctic offshore. 132 refs., 161 figs., 17 tabs.

  9. Puget Sound Career & Job Resources

    E-Print Network [OSTI]

    Kaminsky, Werner

    Puget Sound Career & Job Resources The UW Career Center provides services to current UW students-8300; www.lwtech.edu/ #12;Puget Sound Career & Job Resources North Seattle Community College (206) 934, then Jobs & Careers ADDITIONAL RESOURCES Puget Sound Career Development Association (Professional Career

  10. TIDAL TURBULENCE SPECTRA FROM A COMPLIANT MOORING

    SciTech Connect (OSTI)

    Thomson, Jim; Kilcher, Levi; Richmond, Marshall C.; Talbert, Joe; deKlerk, Alex; Polagye, Brian; Guerra, Maricarmen; Cienfuegos, Rodrigo

    2013-06-13T23:59:59.000Z

    A compliant mooring to collect high frequency turbulence data at a tidal energy site is evaluated in a series of short demon- stration deployments. The Tidal Turbulence Mooring (TTM) improves upon recent bottom-mounted approaches by suspend- ing Acoustic Doppler Velocimeters (ADVs) at mid-water depths (which are more relevant to tidal turbines). The ADV turbulence data are superior to Acoustic Doppler Current Profiler (ADCP) data, but are subject to motion contamination when suspended on a mooring in strong currents. In this demonstration, passive stabilization is shown to be sufficient for acquiring bulk statistics of the turbulence, without motion correction. With motion cor- rection (post-processing), data quality is further improved; the relative merits of direct and spectral motion correction are dis- cussed.

  11. 2008 NWFSC Tidal Freshwater Genetics Results

    SciTech Connect (OSTI)

    David Teel

    2009-05-01T23:59:59.000Z

    Genetic Analysis of Juvenile Chinook Salmon for inclusion in 'Ecology of Juvenile Salmon in Shallow Tidal Freshwater Habitats in the Vicinity of the Sandy River Delta, Lower Columbia River, 2008. Annual Report to Bonneville Power Administration, Contract DE-AC05-76RL01830.'

  12. A High Resolution Hydrodynamic Model of Puget Sound to Support Nearshore Restoration Feasibility Analysis and Design

    SciTech Connect (OSTI)

    Khangaonkar, Tarang; Yang, Zhaoqing

    2011-01-01T23:59:59.000Z

    Estuarine and coastal hydrodynamic processes are sometimes neglected in the design and planning of nearshore restoration actions. Despite best intentions, efforts to restore nearshore habitats can result in poor outcomes if circulation and transport which also affect freshwater-saltwater interactions are not properly addressed. Limitations due to current land use can lead to selection of sub-optimal restoration alternatives that may result in undesirable consequences, such as flooding, deterioration of water quality, and erosion, requiring immediate remedies and costly repairs. Uncertainty with achieving restoration goals, such as recovery of tidal exchange, supply of sediment and nutrients, and establishment of fish migration pathways, may be minimized by using numerical models designed for application to the nearshore environment. A high resolution circulation and transport model of the Puget Sound, in the state of Washington, was developed to assist with nearshore habitat restoration design and analysis, and to answer the question “can we achieve beneficial restoration outcomes at small local scale, as well as at a large estuary-wide scale?” The Puget Sound model is based on an unstructured grid framework to define the complex Puget Sound shoreline using a finite volume coastal ocean model (FVCOM). The capability of the model for simulating the important nearshore processes, such as circulation in complex multiple tidal channels, wetting and drying of tide flats, and water quality and sediment transport as part of restoration feasibility, are illustrated through examples of restoration projects in Puget Sound.

  13. Sound | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteelSolarSolkar SolarSomont GmbHSonnengeldSosSound

  14. Abstract--During lung sound recordings, an incessant noise source occurs due to heart sounds. The heart sound

    E-Print Network [OSTI]

    Moussavi, Zahra M. K.

    Abstract--During lung sound recordings, an incessant noise source occurs due to heart sounds. The heart sound interference on lung sounds is significant especially at low flow rates. In this paper a new to detect HN segments in the spectrogram of the recorded lung sound signal. Afterwards the algorithm removes

  15. Tiki Island, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldson Ethanol LLCEnergyoThornwood,TianfuTidalTiki Island, Texas:

  16. EFFECTS OF SOUND WAVES ON YOUNG SALMON

    E-Print Network [OSTI]

    EFFECTS OF SOUND WAVES ON YOUNG SALMON Marine Biological Laboratory X. 1 33 R A. RTT ir.':; WOODS instantaneously to sounds. It was con- were tested in an experimental tank and in eluded that sound waves were, Wash . sound studies conducted under the above contract are terminated. #12;EFFECTS OF SOUND WAVES

  17. Tidally-induced warps in protostellar discs

    E-Print Network [OSTI]

    C. Terquem; J. Papaloizou; R. Nelson

    1998-10-01T23:59:59.000Z

    We review results on the dynamics of warped gaseous discs. We consider tidal perturbation of a Keplerian disc by a companion star orbiting in a plane inclined to the disc. The perturbation induces the precession of the disc, and thus of any jet it could drive. In some conditions the precession rate is uniform, and as a result the disc settles into a warp mode. The tidal torque also leads to the truncation of the disc, to the evolution of the inclination angle (not necessarily towards alignment of the disc and orbital planes) and to a transport of angular momentum in the disc. We note that the spectral energy distribution of such a warped disc is different from that of a flat disc. We conclude by listing observational effects of warps in protostellar discs.

  18. Tidal heating in multilayered terrestrial exoplanets

    SciTech Connect (OSTI)

    Henning, Wade G.; Hurford, Terry, E-mail: wade.g.henning@nasa.gov [NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771 (United States)

    2014-07-01T23:59:59.000Z

    The internal pattern and overall magnitude of tidal heating for spin-synchronous terrestrial exoplanets from 1 to 2.5 R{sub E} is investigated using a propagator matrix method for a variety of layer structures. Particular attention is paid to ice-silicate hybrid super-Earths, where a significant ice mantle is modeled to rest atop an iron-silicate core, and may or may not contain a liquid water ocean. We find multilayer modeling often increases tidal dissipation relative to a homogeneous model, across multiple orbital periods, due to the ability to include smaller volume low viscosity regions, and the added flexure allowed by liquid layers. Gradations in parameters with depth are explored, such as allowed by the Preliminary Earth Reference Model. For ice-silicate hybrid worlds, dramatically greater dissipation is possible beyond the case of a silicate mantle only, allowing non-negligible tidal activity to extend to greater orbital periods than previously predicted. Surface patterns of tidal heating are found to potentially be useful for distinguishing internal structure. The influence of ice mantle depth and water ocean size and position are shown for a range of forcing frequencies. Rates of orbital circularization are found to be 10-100 times faster than standard predictions for Earth-analog planets when interiors are moderately warmer than the modern Earth, as well as for a diverse range of ice-silicate hybrid super-Earths. Circularization rates are shown to be significantly longer for planets with layers equivalent to an ocean-free modern Earth, as well as for planets with high fractions of either ice or silicate melting.

  19. Siting of dredged material islands in bays and estuaries along low-energy coastlines

    SciTech Connect (OSTI)

    Mathewson, C.C.

    1985-01-01T23:59:59.000Z

    Bays, estuaries, and lagoons along low-energy coastlines are protected shallow water environments, which make them suitable sites for intracoastal transportation routes. Dredging operations often construct disposal islands, which are cost effective and provide protected sites for shore birds. Channel maintenance is often required because sediments are transported from the island to the channel. Studies of dredge material island changes along the Texas coast have shown that the reworking and transport of island sediments is influenced by a number of geologic, geotechnical, biological, and climatic factors. Significant factors are: wind; waves; tides, both astronomic and wind generated; currents produced by wind, fluvial, and tidal processes; physical characteristics of the dredged material; climate, including both prevailing and storm conditions; basin physiography, island design, shape, height, and location within the basin; biology, both flora and fauna; and the activities of man, ship wake, subsidence, etc. Selection of the most effective island location can be based on a process model that incorporates a recognition of the influence and interaction of the physical factors that erode and transport island sediments and those that stabilize the island. This model can be applied early in the site selection process with corresponding improvements in the design and permitting of the dredging program.

  20. Tidal interactions in multi-planet systems

    E-Print Network [OSTI]

    Papaloizou, J C B

    2011-01-01T23:59:59.000Z

    We study systems of close orbiting planets evolving under the influence of tidal circularization. It is supposed that a commensurability forms through the action of disk induced migration and orbital circularization. After the system enters an inner cavity or the disk disperses the evolution continues under the influence of tides due to the central star which induce orbital circularization. We derive approximate analytic models that describe the evolution away from a general first order resonance that results from tidal circularization in a two planet system and which can be shown to be a direct consequence of the conservation of energy and angular momentum. We consider the situation when the system is initially very close to resonance and also when the system is between resonances. We also perform numerical simulations which confirm these models and then apply them to two and four planet systems chosen to have parameters related to the GJ581 and HD10180 systems. We also estimate the tidal dissipation rates t...

  1. 2011 Interference -1 INTERFERENCE OF SOUND WAVES

    E-Print Network [OSTI]

    Glashausser, Charles

    2011 Interference - 1 INTERFERENCE OF SOUND WAVES The objectives of this experiment are: · To measure the wavelength, frequency, and propagation speed of ultrasonic sound waves. · To observe interference phenomena with ultrasonic sound waves. APPARATUS: Oscilloscope, function generator, ultrasonic

  2. Effects of Tidal Turbine Noise on Fish Hearing and Tissues - Draft Final Report - Environmental Effects of Marine and Hydrokinetic Energy

    SciTech Connect (OSTI)

    Halvorsen, Michele B.; Carlson, Thomas J.; Copping, Andrea E.

    2011-09-30T23:59:59.000Z

    Snohomish Public Utility District No.1 plans to deploy two 6 meter OpenHydro tidal turbines in Admiralty Inlet in Puget Sound, under a FERC pilot permitting process. Regulators and stakeholders have raised questions about the potential effect of noise from the turbines on marine life. Noise in the aquatic environment is known to be a stressor to many types of aquatic life, including marine mammals, fish and birds. Marine mammals and birds are exceptionally difficult to work with for technical and regulatory reasons. Fish have been used as surrogates for other aquatic organisms as they have similar auditory structures. This project was funded under the FY09 Funding Opportunity Announcement (FOA) to Snohomish PUD, in partnership with the University of Washington - Northwest National Marine Renewable Energy Center, the Sea Mammal Research Unit, and Pacific Northwest National Laboratory. The results of this study will inform the larger research project outcomes. Proposed tidal turbine deployments in coastal waters are likely to propagate noise into nearby waters, potentially causing stress to native organisms. For this set of experiments, juvenile Chinook salmon (Oncorhynchus tshawytscha) were used as the experimental model. Plans exist for prototype tidal turbines to be deployed into their habitat. Noise is known to affect fish in many ways, such as causing a threshold shift in auditory sensitivity or tissue damage. The characteristics of noise, its spectra and level, are important factors that influence the potential for the noise to injure fish. For example, the frequency range of the tidal turbine noise includes the audiogram (frequency range of hearing) of most fish. This study was performed during FY 2011 to determine if noise generated by a 6-m diameter OpenHydro turbine might affect juvenile Chinook salmon hearing or cause barotrauma. Naturally spawning stocks of Chinook salmon that utilize Puget Sound are listed as threatened (http://www.nwr.noaa.gov/ESA-Salmon-Listings/Salmon-Populations/Chinook/CKPUG.cfm); the fish used in this experiment were hatchery raised and their populations are not in danger of depletion. After they were exposed to simulated tidal turbine noise, the hearing of juvenile Chinook salmon was measured and necropsies performed to check for tissue damage. Experimental groups were (1) noise exposed, (2) control (the same handling as treatment fish but without exposure to tidal turbine noise), and (3) baseline (never handled). Experimental results indicate that non-lethal, low levels of tissue damage may have occurred but that there were no effects of noise exposure on the auditory systems of the test fish.

  3. Regulation of Tidal and Wave Energy Projects (Maine)

    Broader source: Energy.gov [DOE]

    State regulation of tidal and wave energy projects is covered under the Maine Waterway Development and Conservation Act (MWDCA), and complements regulation by the Federal Energy Regulation...

  4. All Eyes on Eastport: Tidal Energy Project Brings Change, Opportunity...

    Office of Environmental Management (EM)

    Ocean Renewable Power Company will unveil its first commercial-scale tidal turbine before it is deployed underwater to generate power. The pilot project -- supported by...

  5. Interconnection Guidelines (Rhode Island)

    Broader source: Energy.gov [DOE]

    Rhode Island enacted legislation (HB 6222) in June 2011 to standardize the application process for the interconnection of customer-sited renewable-energy systems to the state’s distribution grid....

  6. Forestry Policies (Rhode Island)

    Broader source: Energy.gov [DOE]

    Rhode Island's forests cover over half of the state's land area, and are managed by the Department of Environmental Management, Division of Forest Environment. The State issued its "Forest...

  7. THE EFFECT OF MASS LOSS ON THE TIDAL EVOLUTION OF EXTRASOLAR PLANET

    E-Print Network [OSTI]

    Guo, Jianheng

    By combining mass loss and tidal evolution of close-in planets, we present a qualitative study on their tidal migrations. We incorporate mass loss in tidal evolution for planets with different masses and find that mass ...

  8. Puget Sound Dredged Disposal Analysis

    SciTech Connect (OSTI)

    Urabeck, F.J.; Phillips, K.E.

    1992-04-01T23:59:59.000Z

    Future disposal of dredged material in the Puget Sound estuary of the State of Washington is of major interest to Federal, state, and local governmental regulatory agencies, as well as those responsible for maintaining existing waterways and harbors. Elevated levels of toxic chemicals exist in bottom sediments of all the urban bays, with tumors and other biological abnormalities found in bottom fish associated with these water bodies. Public awareness of this situation has been heightened by extensive media coverage of recent government investigations of environmental conditions in Puget Sound. These investigations and public concerns have led to three ongoing regional planning efforts, all of which deal with Puget Sound water quality and marine bottom sediments. This paper reports on the Puget Sound Dredged Disposal Analysis (PSDDA), a 3-year joint Federal-state study primarily focusing on unconfined, open-water disposal of material dredged from Federal and non-Federal navigation projects. Study objectives include (a) selection of unconfined, open-water disposal sites; (b) development of sampling, testing, and test interpretation procedures to be used in evaluating the suitability of dredged material for disposal in Puget Sound waters; and (c) formulation of disposal site management plans. Preliminary findings for each of these objectives are discussed for central Puget Sound, which includes the ports of Seattle, Tacoma, and Everett.

  9. Tidal Energy Resource Assessment | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideoStrategic|Industrial Sector,Department ThirdCosts | Department ofTidal Energy

  10. Tidal Sails AS | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldson Ethanol LLCEnergyoThornwood,TianfuTidal Sails AS Jump to:

  11. TidalStream | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin Baxin Hydropower Station Jump to: navigation, searchNewTidal

  12. Enhancing Electrical Supply by Pumped Storage in Tidal Lagoons

    E-Print Network [OSTI]

    MacKay, David J.C.

    to demand into high­value demand­following power; and second, it can simultaneously serve as a tidal power/3/07 Summary The principle that the net energy delivered by a tidal pool can be increased by pumping extra stop blowing for two days at a time? Chemical or kinetic­energy storage systems are an economical way

  13. Enhancing Electrical Supply by Pumped Storage in Tidal Lagoons

    E-Print Network [OSTI]

    MacKay, David J.C.

    to demand into high-value demand-following power; and second, it can simultaneously serve as a tidal power/3/07 Summary The principle that the net energy delivered by a tidal pool can be increased by pumping extra stop blowing for two days at a time? Chemical or kinetic-energy storage systems are an economical way

  14. Tidal Conversion at a Submarine Ridge FRANOIS PTRLIS

    E-Print Network [OSTI]

    Young, William R.

    that control the tidally powered radiation of in- ternal gravity waves (the "tidal conversion") from received 30 July 2003, in final form 20 January 2004) ABSTRACT The radiative flux of internal wave energy tide over submarine topography is a main source of the mechanical energy required to power the internal

  15. Directly Imaging Tidally Powered Migrating Jupiters

    E-Print Network [OSTI]

    Dong, Subo; Socrates, Aristotle

    2012-01-01T23:59:59.000Z

    We show that ongoing direct imaging experiments may detect a new class of long-period, highly luminous, tidally powered extrasolar gas giants. Even though they are hosted by Gyr-"old" main-sequence stars, they can be as "hot" as young Jupiters at ~100 Myr, the prime targets of direct imaging surveys. These planets, with years-long orbits, are presently migrating to "feed" the "hot Jupiters" in steady state. Their existence is expected from a class of "high-e" migration mechanisms, in which gas giants are excited to highly eccentric orbits and then shrink their semi-major axis by factor of ~ 10-100 due to tidal dissipation at successive close periastron passages. The dissipated orbital energy is converted to heat, and if it is deposited deep enough into the planet atmosphere, the planet likely radiates steadily at luminosity ~2-3 orders of magnitude larger than that of our Jupiter during a typical Gyr migration time scale. Their large orbital separations and expected high planet-to-star flux ratios in IR make ...

  16. Aleutian Pribilof Islands Wind Energy Feasibility Study

    SciTech Connect (OSTI)

    Bruce A. Wright

    2012-03-27T23:59:59.000Z

    Under this project, the Aleutian Pribilof Islands Association (APIA) conducted wind feasibility studies for Adak, False Pass, Nikolski, Sand Point and St. George. The DOE funds were also be used to continue APIA's role as project coordinator, to expand the communication network quality between all participants and with other wind interest groups in the state and to provide continued education and training opportunities for regional participants. This DOE project began 09/01/2005. We completed the economic and technical feasibility studies for Adak. These were funded by the Alaska Energy Authority. Both wind and hydro appear to be viable renewable energy options for Adak. In False Pass the wind resource is generally good but the site has high turbulence. This would require special care with turbine selection and operations. False Pass may be more suitable for a tidal project. APIA is funded to complete a False Pass tidal feasibility study in 2012. Nikolski has superb potential for wind power development with Class 7 wind power density, moderate wind shear, bi-directional winds and low turbulence. APIA secured nearly $1M from the United States Department of Agriculture Rural Utilities Service Assistance to Rural Communities with Extremely High Energy Costs to install a 65kW wind turbine. The measured average power density and wind speed at Sand Point measured at 20m (66ft), are 424 W/m2 and 6.7 m/s (14.9 mph) respectively. Two 500kW Vestas turbines were installed and when fully integrated in 2012 are expected to provide a cost effective and clean source of electricity, reduce overall diesel fuel consumption estimated at 130,000 gallons/year and decrease air emissions associated with the consumption of diesel fuel. St. George Island has a Class 7 wind resource, which is superior for wind power development. The current strategy, led by Alaska Energy Authority, is to upgrade the St. George electrical distribution system and power plant. Avian studies in Nikolski and Sand Point have allowed for proper wind turbine siting without killing birds, especially endangered species and bald eagles. APIA continues coordinating and looking for funding opportunities for regional renewable energy projects. An important goal for APIA has been, and will continue to be, to involve community members with renewable energy projects and energy conservation efforts.

  17. A new golden era in island biogeography

    E-Print Network [OSTI]

    Fernandez-Palacios, Jose Maria; Kueffer, Christoph; Drake, Donald

    2015-01-01T23:59:59.000Z

    Insular woodiness on the Canary Islands: a remarkable caseevery five days in the Canary Islands (Martín Esquivel et

  18. PSEG Long Island- Net Metering

    Broader source: Energy.gov [DOE]

    Although PSEG Long Island’s net metering policy is not governed by the State’s net metering law, the provisions are similar to the State law. Net metering is available for residential, non-reside...

  19. MHK Projects/Roosevelt Island Tidal Energy RITE | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:LandownersLuther, Oklahoma:Energy Information

  20. MHK Projects/Cape Islands Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformation Other4Q07)AKBrough Head Wave Farm

  1. MHK Projects/Fishers Island Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformationCygnet < MHKSound, NY Project State/Province

  2. MHK Projects/Shelter Island Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformationCygnet.7413°,Scotlandville BendBillia Croo,New

  3. MHK Projects/Ward s Island Tidal Power Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose Bend < MHK Projects Jump to:Vicksburg Bend < MHK ProjectsWECs

  4. Long Island Solar Farm

    SciTech Connect (OSTI)

    Anders, R.

    2013-05-01T23:59:59.000Z

    The Long Island Solar Farm (LISF) is a remarkable success story, whereby very different interest groups found a way to capitalize on unusual circumstances to develop a mutually beneficial source of renewable energy. The uniqueness of the circumstances that were necessary to develop the Long Island Solar Farm make it very difficult to replicate. The project is, however, an unparalleled resource for solar energy research, which will greatly inform large-scale PV solar development in the East. Lastly, the LISF is a superb model for the process by which the project developed and the innovation and leadership shown by the different players.

  5. On the circulation and tidal flushing of Mobile Bay, Alabama 

    E-Print Network [OSTI]

    Austin, George Belden

    1953-01-01T23:59:59.000Z

    is not filling with sediment to any apparent degree. The U. S. Corps of Engineers maintains ths Mobile Ship Channel to a depth of thirty-two feet. Dredging operations proceed during most of the year since this depth is some twenty-two f'eet below the mean bay... ~ ~ ~ ~ ix ~ ~ ~ ~ ~ ~ ~ ~ ~ 1 ~ 4 6 9 10 E. Meteorological III. TIDAL FLUSHING THEORY 15 A. Ketchum's Tidal Prism Theory B. Stommel's and Arons' Ydxing Length Theory. of Tidal Flushing IV. THE HYDROGRAPHIC SURVEY 22 27 A. Planning B...

  6. On the circulation and tidal flushing of Mobile Bay, Alabama

    E-Print Network [OSTI]

    Austin, George Belden

    1953-01-01T23:59:59.000Z

    . For each of the twenty-eight station positions, curves vere then drawn for temperature-depth and salinity&epth for the different ob- served tidal stages. From these curves temperature-depth sections (Figure V) and salinity-depth sections (Figures VI, VII...) vere oon- structed 1' or six cross-sections of Mobile Bay and for the ship channel length, for the different tidal stages. Current velocity vectors were plotted by station for surface and bottom at ebb and flood tidal stages. From these data surface...

  7. NAME: Elkhorn Slough Tidal Marsh Restoration: Building Resilience with the Beneficial Reuse of Sediment

    E-Print Network [OSTI]

    US Army Corps of Engineers

    stormwater runoff. EXPECTED BENEFITS: Habitats, particularly tidal marsh, intertidal mudflat, and soft

  8. GREEN HOMES LONG ISLAND

    E-Print Network [OSTI]

    Kammen, Daniel M.

    energy bill, reduce your carbon footprint... at little or no cost to you. #12;A Message From Supervisor energy-efficient and reduce our community's carbon footprint. Why do we call it Long Island Green Homes to yourevery day. By making basic improvements to yourevery day home, you can reduce your carbon footprint

  9. Thermoacoustic tomography, variable sound speed Plamen Stefanov

    E-Print Network [OSTI]

    Stefanov, Plamen

    Thermoacoustic tomography, variable sound speed Plamen Stefanov Purdue University Based on a joint work with Gunther Uhlmann Plamen Stefanov (Purdue University ) Thermoacoustic tomography, variable sound speed 1 / 18 #12;Formulation Main Problem Thermoacoustic Tomography In thermoacoustic tomography

  10. Barrier island depositional systems in Black Warrior basin, lower Pennsylvanian (Pottsville) in northwestern Alabama

    SciTech Connect (OSTI)

    Haas, C.A.; Gastaldo, R.A.

    1986-05-01T23:59:59.000Z

    The basal Pennsylvanian lower Pottsville Formation in the Black Warrior basin of northwestern Alabama is part of a southwestward-thickening wedge of terrigenous sediments consisting of orthoquartzitic sandstone, siltstone, and shales with discontinuous coals. The present study delineates each lower Pottsville lithofacies, to confirm or refute a barrier-island model. Preliminary interpretation of lithofacies using lithologic criteria, sedimentary structures, and fossil assemblages confirms a barrier deposition system. Exposures along I-65 in southern Cullman County are interpreted to represent lagoonal deposits based on the high percentage of mud-sized material, massive and structureless washover sandstone beds, and highly rippled interbedded sandstones and silty shales that contain microcross-stratification. Exposures in northern Cullman County are interpreted to represent tidal channel-fill deposits, flood tidal sequences, and possible foreshore sandstone deposits. Tidal channel-fill deposits are recognized by coarse sandstone textures with pebble lags, large-scale cross-bedding, and their geometry. Flood tidal sequences are recognized by stacked cross-bedded sets and additional sedimentary structures. Foreshore deposits are interpreted based on the orientation of low-angle planar bedding.

  11. Numerical and Experimental Investigation of Tidal Current Energy Extraction 

    E-Print Network [OSTI]

    Sun, Xiaojing

    2008-01-01T23:59:59.000Z

    Numerical and experimental investigations of tidal current energy extraction have been conducted in this study. A laboratory-scale water flume was simulated using commercial computational fluid dynamics (CFD) code FLUENT. ...

  12. axis tidal turbines: Topics by E-print Network

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

    8 Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and Physics Websites Summary: Power Limitation Control for a PMSG-Based Marine Current...

  13. analysing tidally induced: Topics by E-print Network

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

    15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Tidally-induced thermonuclear Supernovae Astrophysics (arXiv) Summary: We discuss the results of 3D simulations...

  14. Hydrodynamic analysis of a vertical axis tidal current turbine 

    E-Print Network [OSTI]

    Gretton, Gareth I.

    2009-01-01T23:59:59.000Z

    Tidal currents can be used as a predictable source of sustainable energy, and have the potential to make a useful contribution to the energy needs of the UK and other countries with such a resource. One of the technologies ...

  15. Geomorphic structure of tidal hydrodynamics in salt marsh creeks

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    of the tidal signal within the marsh area. Citation: Fagherazzi, S., M. Hannion, and P. D'Odorico (2008 by elegant hydrological and geomorphological theories [Gupta et al., 1980; Rodriguez-Iturbe and Valdes, 1979

  16. Report of the Puget Sound Expedition

    E-Print Network [OSTI]

    Report of the Puget Sound Expedition September 8-16, 1998 A Rapid Assessment Survey of Non-indigenous Species in the Shallow Waters of Puget Sound Prepared by Andrew Cohen, Claudia Mills, Helen Berry Olympia, WA 98504-7027 (360) 902-1100 #12;Report of the Puget Sound Expedition Sept. 8-16, 1998 Contents

  17. S10-Sound-Interference -1 -Page 1 of 8 INTERFERENCE OF SOUND WAVES

    E-Print Network [OSTI]

    Glashausser, Charles

    S10-Sound-Interference - 1 - Page 1 of 8 INTERFERENCE OF SOUND WAVES PURPOSE: To measure the wavelength, frequency, and propagation speed of ultrasonic sound waves and to observe interference phenomena with ultrasonic sound waves. APPARATUS: Oscilloscope, function generator, transducers, meter stick, angle board

  18. Nonrotating black hole in a post-Newtonian tidal environment

    E-Print Network [OSTI]

    Stephanne Taylor; Eric Poisson

    2008-09-11T23:59:59.000Z

    We examine the motion and tidal dynamics of a nonrotating black hole placed within a post-Newtonian external spacetime. The tidal perturbation created by the external environment is treated as a small perturbation. At a large distance from the black hole, the gravitational field of the external distribution of matter is assumed to be sufficiently weak to be adequately described by the (first) post-Newtonian approximation to general relativity. There, the black hole is treated as a monopole contribution to the total gravitational field. There exists an overlap in the domains of validity of each description, and the black-hole and post-Newtonian metrics are matched in the overlap. The matching procedure produces the equations of motion for the black hole and the gravito-electric and gravito-magnetic tidal fields acting on the black hole. We first calculate the equations of motion and tidal fields by making no assumptions regarding the nature of the post-Newtonian environment; this could contain a continuous distribution of matter or any number of condensed bodies. We next specialize our discussion to a situation in which the black hole is a member of a post-Newtonian two-body system. As an application of our results, we examine the geometry of the deformed event horizon and calculate the tidal heating of the black hole, the rate at which it acquires mass as a result of its tidal interaction with the companion body.

  19. Culturing revolution : the local Communists of China's Hainan Island

    E-Print Network [OSTI]

    Murray, Jeremy Andrew

    2011-01-01T23:59:59.000Z

    One: Deserted Treasure Island……………………………………………….13 ChapterChapter One Deserted Treasure Island: The Social Ecology andIsolated Island/Treasure Island – Gudao / Baodao Social and

  20. The tidal disruption of protoplanetary accretion discs

    E-Print Network [OSTI]

    John D. Larwood

    1997-05-30T23:59:59.000Z

    In this paper we revisit the problem of the tidal interaction occuring between a protostellar accretion disc and a secondary point mass following a parabolic trajectory. We model the disc response analytically and we compare our results with three-dimensional SPH simulations. Inviscid as well as viscous hydrodynamics is considered. We show that in a viscous system the response derived from inviscid considerations is predominant even for the highest estimates of an anomalous disc shear viscosity. The angular momentum lost from the disc during the encounter is derived from linear theory, for distant fly-bys, as well as the changes to the disc orientation expected in non-coplanar encounters. It is shown that the target discs can become warped and precess by a small amount during non-coplanar encounters. This small precession is shown to give rise to a relative tilt of the disc which is always more important for determining its final orientation than is the change to the orbital inclination. We discuss the implications of our results for protostellar accretion discs and planetary systems.

  1. Multi-scale modeling of Puget Sound using an unstructured-grid coastal ocean model: from tide flats to estuaries and coastal waters

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Khangaonkar, Tarang

    2010-11-19T23:59:59.000Z

    Water circulation in Puget Sound, a large complex estuary system in the Pacific Northwest coastal ocean of the United States, is governed by multiple spatially and temporally varying forcings from tides, atmosphere (wind, heating/cooling, precipitation/evaporation, pressure), and river inflows. In addition, the hydrodynamic response is affected strongly by geomorphic features, such as fjord-like bathymetry and complex shoreline features, resulting in many distinguishing characteristics in its main and sub-basins. To better understand the details of circulation features in Puget Sound and to assist with proposed nearshore restoration actions for improving water quality and the ecological health of Puget Sound, a high-resolution (around 50 m in estuaries and tide flats) hydrodynamic model for the entire Puget Sound was needed. Here, a threedimensional circulation model of Puget Sound using an unstructured-grid finite volume coastal ocean model is presented. The model was constructed with sufficient resolution in the nearshore region to address the complex coastline, multi-tidal channels, and tide flats. Model open boundaries were extended to the entrance of the Strait of Juan de Fuca and the northern end of the Strait of Georgia to account for the influences of ocean water intrusion from the Strait of Juan de Fuca and the Fraser River plume from the Strait of Georgia, respectively. Comparisons of model results, observed data, and associated error statistics for tidal elevation, velocity, temperature, and salinity indicate that the model is capable of simulating the general circulation patterns on the scale of a large estuarine system as well as detailed hydrodynamics in the nearshore tide flats. Tidal characteristics, temperature/salinity stratification, mean circulation, and river plumes in estuaries with tide flats are discussed.

  2. Rhode Island Stormwater Design and Installation Standards Manual (Rhode Island)

    Broader source: Energy.gov [DOE]

    Rhode Island's stormwater design and installation standards manual has been developed to describe mandatory and suggested stormwater design and performance criteria for applicants to the Department...

  3. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island June 1, 2003 ­ August 31, 2003 Prepared for Massachusetts...................................................................................................................... 9 Wind Speed Time Series............................................................................................................. 9 Wind Speed Distribution

  4. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island December 1, 2003 ­ February 29, 2004 Prepared for Massachusetts.................................................................................................................... 11 Wind Speed Time Series........................................................................................................... 11 Wind Speed Distribution

  5. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island March 1, 2003 ­ May 31, 2003 Prepared for Massachusetts Technology...................................................................................................................... 9 Wind Speed Time Series............................................................................................................. 9 Wind Speed Distributions

  6. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island September 1, 2003 ­ November 30, 2003 Prepared for Massachusetts...................................................................................................................... 9 Wind Speed Time Series............................................................................................................. 9 Wind Speed Distribution

  7. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island March 1, 2004 ­ May 31, 2004 Prepared for Massachusetts Technology...................................................................................................................... 9 Wind Speed Time Series............................................................................................................. 9 Wind Speed Distribution

  8. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island June 1, 2004 ­ August 31, 2004 Prepared for Massachusetts...................................................................................................................... 9 Wind Speed Time Series............................................................................................................. 9 Wind Speed Distribution

  9. Minnesota Nuclear Profile - Prairie Island

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

    Prairie Island" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date"...

  10. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island December 1, 2004 ­ February 28, 2005 Prepared for Massachusetts.................................................................................................................... 10 Wind Speed Time Series........................................................................................................... 10 Wind Speed Distribution

  11. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island September 1, 2004 ­ November 30, 2004 Prepared for Massachusetts.................................................................................................................... 11 Wind Speed Time Series........................................................................................................... 11 Wind Speed Distribution.............

  12. WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Thompson Island March 1, 2005 ­ May 31, 2005 Prepared for Massachusetts Technology.................................................................................................................... 10 Wind Speed Time Series........................................................................................................... 10 Wind Speed Distribution

  13. Using Tidal Tails to Probe Dark Matter Halos

    E-Print Network [OSTI]

    John Dubinski; J. Christopher Mihos; Lars Hernquist

    1995-09-04T23:59:59.000Z

    We use simulations of merging galaxies to explore the sensitivity of the morphology of tidal tails to variations of the halo mass distributions in the parent galaxies. Our goal is to constrain the mass of dark halos in well-known merging pairs. We concentrate on prograde encounters between equal mass galaxies which represent the best cases for creating tidal tails, but also look at systems with different relative orientations, orbital energies and mass ratios. As the mass and extent of the dark halo increase in the model galaxies, the resulting tidal tails become shorter and less massive, even under the most favorable conditions for producing these features. Our simulations imply that the observed merging galaxies with long tidal tails ($\\sim 50-100$ kpc) such as NGC 4038/39 (the Antennae) and NGC 7252 probably have halo:disk+bulge mass ratios less than 10:1. These results conflict with the favored values of the dark halo mass of the Milky Way derived from satellite kinematics and the timing argument which give a halo:disk+bulge mass ratio of $\\sim 30:1$. However, the lower bound of the estimated dark halo mass in the Milky Way (mass ratio $\\sim 10:1$) is still consistent with the inferred tidal tail galaxy masses. Our results also conflict with the expectations of $\\Omega=1$ cosmologies such as CDM which predict much more massive and extended dark halos.

  14. Quantifying Vegetation Recovery on Santa Rosa Island

    E-Print Network [OSTI]

    Rentschlar, Elizabeth

    2014-12-09T23:59:59.000Z

    The rate of recovery on barrier islands after hurricanes is not well understood, because the majority of studies have focused on the geomorphic impact of storms on barrier islands. Dune vegetation recovery is a vital component of barrier island...

  15. Nauru Island Effect Study

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire Solar541,9337, 2011 at 2:00 P.M. Next8,NatureNauru Island

  16. Anomalous Cherenkov spin-orbit sound

    SciTech Connect (OSTI)

    Smirnov, Sergey [Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany)

    2011-02-15T23:59:59.000Z

    The Cherenkov effect is a well-known phenomenon in the electrodynamics of fast charged particles passing through transparent media. If the particle is faster than the light in a given medium, the medium emits a forward light cone. This beautiful phenomenon has an acoustic counterpart where the role of photons is played by phonons and the role of the speed of light is played by the sound velocity. In this case the medium emits a forward sound cone. Here, we show that in a system with spin-orbit interactions in addition to this normal Cherenkov sound there appears an anomalous Cherenkov sound with forward and backward sound propagation. Furthermore, we demonstrate that the transition from the normal to anomalous Cherenkov sound happens in a singular way at the Cherenkov cone angle. The detection of this acoustic singularity therefore represents an alternative experimental tool for the measurement of the spin-orbit coupling strength.

  17. Advanced structure-borne sound Wave mobilities

    E-Print Network [OSTI]

    Berlin,Technische Universität

    ^p e j(v -p ) · Wave mobilities © Prof. B.A.T. Petersson Advanced structure-borne sound · Decomposed1 Advanced structure-borne sound p(kx) v(kx) v = p Y = ^ve- jkx x ejv ^pe- jkx x e jp = ^v ^p = ^v;2 Advanced structure-borne sound · Interface mobilities s C kp = 2p C kq = 2q C ; p = 0 ±1 ±2 ±3... ; q = 0

  18. Zero sound in dipolar Fermi gases

    SciTech Connect (OSTI)

    Ronen, Shai [JILA and Department of Physics, University of Colorado, Boulder, Colorado 80301 (United States); Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck (Austria); Bohn, John L. [JILA and Department of Physics, University of Colorado, Boulder, Colorado 80301 (United States)

    2010-03-15T23:59:59.000Z

    We study the propagation of sound in a homogeneous dipolar gas at zero temperature, which is known as zero sound. We find that undamped zero sound propagation is possible only in a range of solid angles around the direction of polarization of the dipoles. Above a critical dipole moment, we find an unstable mode, by which the gas collapses locally perpendicular to the dipoles' direction.

  19. Small-Scale Solar Grants (Rhode Island)

    Broader source: Energy.gov [DOE]

    The Rhode Island Economic Development Corporation (RIEDC) provides incentives for renewable-energy projects. Incentive programs are funded by the Rhode Island Renewable Energy Fund (RIREF) and...

  20. Energy Transition Initiative: Islands Playbook (Book) | OSTI...

    Office of Scientific and Technical Information (OSTI)

    Energy Transition Initiative: Islands Playbook (Book) Re-direct Destination: The Island Energy Playbook (the Playbook) provides an action-oriented guide to successfully initiating,...

  1. The Theory of Island Biogeography

    E-Print Network [OSTI]

    Landweber, Laura

    The Theory of Island Biogeography Robert H. MacArthur and Edward O. Wilson The young biologists" dominated by the collection of data. In The Theory of Island Biogeography they set out to change that by devel- oping a general mathema- tical theory that would make sense of a key ecological problem

  2. Sound Waves from Quenched Jets

    E-Print Network [OSTI]

    Vladimir Khachatryan; Edward Shuryak

    2011-08-15T23:59:59.000Z

    Heavy ion collisions at RHIC/LHC energies are well described by the (nearly ideal) hydrodynamics. Last year this success has been extended to higher angular harmonics, $v_n,n=3..9$ induced by initial-state perturbations, in analogy to cosmic microwave background fluctuations. Here we use hydrodynamics to study sound propagation emitted by quenched jets. We use the so called "geometric acoustics" to follow the sound propagation, on top of the expanding fireball. The conical waves, known as "Mach cones", turn out to be strongly distorted. We show that large radial flow makes the observed particle spectra to be determined mostlly by the vicinity of their intersection with the fireball's space-like and time-like freezeout surfaces. We further show how the waves modify the freezeout surfaces and spectra. We end up comparing our calculations to the two-particle correlation functions at RHIC, while emphasizing that studies of dijet events observed at LHC should provide much better test of our theory.

  3. TIDAL DISRUPTION FLARES: THE ACCRETION DISK PHASE

    SciTech Connect (OSTI)

    Montesinos Armijo, Matias; De Freitas Pacheco, Jose A. [Observatoire de la Cote d'Azur, Laboratoire Cassiopee, Universite de Nice Sophia-Antipolis Bd de l'Observatoire, BP 4229, 06304 Nice Cedex 4 (France)

    2011-08-01T23:59:59.000Z

    The evolution of an accretion disk, formed as a consequence of the disruption of a star by a black hole, is followed by solving numerically hydrodynamic equations. The present investigation aims to study the dependence of resulting light curves on dynamical and physical properties of such a transient disk during its existence. One of the main results derived from our simulations is that blackbody fits of X-ray data tend to overestimate the true mean disk temperature. In fact, the temperature derived from blackbody fits should be identified with the color X-ray temperature rather than the average value derived from the true temperature distribution along the disk. The time interval between the beginning of the circularization of the bound debris and the beginning of the accretion process by the black hole is determined by the viscous (or accretion) timescale, which also fixes the rising part of the resulting light curve. The luminosity peak coincides with the beginning of matter accretion by the black hole and the late evolution of the light curve depends on the evolution of the debris fallback rate. Peak bolometric luminosities are in the range 10{sup 45}-10{sup 46} erg s{sup -1}, whereas peak luminosities in soft X-rays (0.2-2.0 keV) are typically one order of magnitude lower. The typical timescale derived from our preferred models for the flare luminosity to decay by two orders of magnitude is about 3-4 yr. Predicted soft X-ray light curves reproduce quite well data on galaxies in which a variable X-ray emission possibly related to a tidal event was detected. In the cases of NGC 3599 and IC 3599, data are reproduced well by models defined by a black hole with mass {approx}10{sup 7} M{sub sun} and a disrupted star of about 1 solar mass. The X-ray variation observed in XMMSL1 is consistent with a model defined by a black hole with mass {approx}3 x 10{sup 6} M{sub sun} and a disrupted star of 1 solar mass, while that observed in the galaxy situated in the cluster A1689 is consistent with a model including a black hole of {approx}10{sup 7} M{sub sun} and a disrupted star of {approx}0.5 M{sub sun}.

  4. Schlumberger Resistivity Soundings At North Brawley Geothermal...

    Open Energy Info (EERE)

    due to the success of a geothermal power plant at the southern part of Imperial Valley in Cerro Prieto, Mexico. Notes Schlumberger depth soundings were conducted across Imperial...

  5. Schlumberger Resistivity Soundings At Chena Geothermal Area ...

    Open Energy Info (EERE)

    Schlumberger Resistivity Soundings Activity Date 1979 - 1980 Usefulness useful DOE-funding Unknown Exploration Basis Geophysical studies through the University of Alaska...

  6. Experiment Indicates Sound Waves Can Trigger Quakes

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

    in a laboratory setting, a Los Alamos researcher and his colleagues have shown that seismic waves-the sounds radiated from earthquakes-can induce earthquake aftershocks, often...

  7. Modeling Tidal Freshwater Marsh Sustainability in the Sacramento–San Joaquin Delta Under a Broad Suite of Potential Future Scenarios

    E-Print Network [OSTI]

    Swanson, Kathleen M.; Drexler, Judith Z.; Fuller, Christopher C.; Schoellhamer, David H.

    2015-01-01T23:59:59.000Z

    Tidal Freshwater Marsh Sustainability in the Sacramento–Sanof pulsing events to sustainability. Estuaries Coasts 18:Evaluating tidal marsh sustainability in the face of sea-

  8. Sustainability of a Tidal Freshwater Marsh Exposed to a Long-term Hydrologic Barrier and Sea Level Rise

    E-Print Network [OSTI]

    Vermont, University of

    a tidal fresh- water marsh perpendicular to the Patuxent River (Maryland) channel has created a northern elevation change . Accretion . Tidal freshwater marsh . Seasonal sedimentation . Jug Bay . Patuxent River

  9. A Conceptual Restoration Plan and Tidal Hydrology Assessment for Reconnecting Spring Branch Creek to Suisun Marsh, Solano County, California

    E-Print Network [OSTI]

    Olson, Jessica J.

    2012-01-01T23:59:59.000Z

    Marsh. UC Berkeley LA 222 Hydrology Term Paper. Orr, M. , S.Restoration Plan and Tidal Hydrology Assessment forthree consists of a tidal hydrology analysis before and

  10. Methylmercury Production in Tidal Salt Marsh Sediments and Potential Control Using Iron Amendments

    E-Print Network [OSTI]

    Ulrich, Patrick D.

    2011-01-01T23:59:59.000Z

    Bay, a freshwater tidal mudflat wetland in the Hudson River.species that utilized tidal mudflat or open bay habitats (in forage fish that utilize mudflat and wetland habitats

  11. Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean...

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

    Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current, and In-Stream Hydrokinetic Power Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current,...

  12. Relativistic tidal heating of Hamiltonian quasi-local boundary expressions

    E-Print Network [OSTI]

    So, Lau Loi

    2015-01-01T23:59:59.000Z

    Purdue and Favata calculate the tidal heating used certain classical pseudotensors. Booth and Creighton employed the quasi-local mass formalism of Brown and York to demonstrate the same subject. All of them give the result matched with the Newtonian theory. Here we present another Hamiltonian quasi-local boundary expressions and all give the same desired value. This indicates that the tidal heating is unique as Thorne predicted. Moreover, we discovered that the pseudo-tensor method and quasi-local method are fundamentally different.

  13. Relativistic tidal heating of Hamiltonian quasi-local boundary expressions

    E-Print Network [OSTI]

    Lau Loi So

    2015-05-19T23:59:59.000Z

    Purdue and Favata calculate the tidal heating used certain classical pseudotensors. Booth and Creighton employed the quasi-local mass formalism of Brown and York to demonstrate the same subject. All of them give the result matched with the Newtonian theory. Here we present another Hamiltonian quasi-local boundary expressions and all give the same desired value. This indicates that the tidal heating is unique as Thorne predicted. Moreover, we discovered that the pseudo-tensor method and quasi-local method are fundamentally different.

  14. Extreme Value Analysis of Tidal Stream Velocity Perturbations

    SciTech Connect (OSTI)

    Harding, Samuel; Thomson, Jim; Polagye, Brian; Richmond, Marshall C.; Durgesh, Vibhav; Bryden, Ian

    2011-04-26T23:59:59.000Z

    This paper presents a statistical extreme value analysis of maximum velocity perturbations from the mean flow speed in a tidal stream. This study was performed using tidal velocity data measured using both an Acoustic Doppler Velocimeter (ADV) and an Acoustic Doppler Current Profiler (ADCP) at the same location which allows for direct comparison of predictions. The extreme value analysis implements of a Peak-Over-Threshold method to explore the effect of perturbation length and time scale on the magnitude of a 50-year perturbation.

  15. A numerical model for the coupled long-term evolution of salt marshes and tidal flats

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    -shore mudflat model that takes into account tidal effects; Waeles et al. [2004] incor- porated in the same

  16. MSL F693 F01 French Tidal Power CRN # 36273 Station

    E-Print Network [OSTI]

    Kowalik, Zygmunt

    MSL F693 F01 French Tidal Power CRN # 36273 Station 3 CREDITS Zygmunt Kowalik A new course on TIDES. Such application has raised many questions about an environmental impact of tidal power development. The course a function of the changes in the sun- earth-moon system, caused by dissipation of the tidal energy

  17. TIDAL HEATING OF EXTRASOLAR PLANETS Brian Jackson, Richard Greenberg, and Rory Barnes

    E-Print Network [OSTI]

    Barnes, Rory

    TIDAL HEATING OF EXTRASOLAR PLANETS Brian Jackson, Richard Greenberg, and Rory Barnes Lunar and gas cleared away, and as the orbits evolved there was substantial tidal heating within the planets. The tidal heating history of each planet may have contributed significantly to the thermal budget governing

  18. Satellite Infrared Soundings From NOAA Spacecraft

    E-Print Network [OSTI]

    NOAA Tec / Satellite Infrared Soundings From NOAA Spacecraft #12;U.S. DEPARTMENT OF COMMERCE Infrared Soundings From NOAA Spacecraft L. M. McMillin D. Q. Wark J. M. Siomkajlo P. G. Abel A. Werbowetzki. E. Bittner C. M. Hayden #12;UDC 551.507.362.2:551.508.2:551.501.7:535-1 Physics Infrared radiation

  19. Generalised Soundness of Workflow Nets is Decidable

    E-Print Network [OSTI]

    Sidorova, Natalia

    Generalised Soundness of Workflow Nets is Decidable Kees van Hee, Natalia Sidorova, and Marc investigate the decidability of the problem of generalised soundness for Workflow nets: ``Every marking with considering simple correctness criteria for Workflow nets and reduce them to the check of structural

  20. Feeding Young Horses For Sound Development 

    E-Print Network [OSTI]

    Gibbs, Pete G.; Potter, Gary D.

    2005-05-25T23:59:59.000Z

    Feeding Young Horses for Sound Development B-5043 05-05 Feeding Young Horses for Sound Development Pete G. Gibbs Professor and Extension Horse Specialist Department Of Animal Science Equine Sciences Program The Texas A&M University System Gary D...

  1. Virginia Wetlands Report Tools of the Tidal Shoreline

    E-Print Network [OSTI]

    Virginia Wetlands Report Tools of the Tidal Shoreline Management Trade Friday, October 13, 2006 of new tools produced by the Center for Coastal Resources Managment (CCRM) and other programs) technology with digital aerial photographs and the power of the Internet. They are accessible from desktop

  2. Tidal Stage Variability of Fecal Coliform and Chlorophyll a

    E-Print Network [OSTI]

    Mallin, Michael

    leachates, leaking sewer mains, wild and do- mestic animal wastes, and runo. However, the inter- action environmental hazards, to enter an estuarine environment characterized by high variability regarding temperature to understanding both the basic ecology of tidal creeks and the applied aspects of sampling protocols and pollutant

  3. First-post-Newtonian quadrupole tidal interactions in binary systems

    E-Print Network [OSTI]

    Justin Vines; Éanna É. Flanagan

    2014-10-09T23:59:59.000Z

    We consider tidal coupling in a binary stellar system to first-post-Newtonian order. We derive the orbital equations of motion for bodies with spins and mass quadrupole moments and show that they conserve the total linear momentum of the binary. We note that spin-orbit coupling must be included in a 1PN treatment of tidal interactions in order to maintain consistency (except in the special case of adiabatically induced quadrupoles); inclusion of 1PN quadrupolar tidal effects while omitting spin effects would lead to a failure of momentum conservation for generic evolution of the quadrupoles. We use momentum conservation to specialize our analysis to the system's center-of-mass-energy frame; we find the binary's relative equation of motion in this frame and also present a generalized Lagrangian from which it can be derived. We then specialize to the case in which the quadrupole moment is adiabatically induced by the tidal field (in which case it is consistent to ignore spin effects). We show how the adiabatic dynamics for the quadrupole can be incorporated into our action principle and present the simplified orbital equations of motion and conserved energy for the adiabatic case. These results are relevant to gravitational wave signals from inspiralling binary neutron stars.

  4. Large-scale tidal fields on primordial density perturbations ?

    E-Print Network [OSTI]

    Alejandro Gonzalez

    1997-02-17T23:59:59.000Z

    We calculate the strength of the tidal field produced by the large-scale density field acting on primordial density perturbations in power law models. By analysing changes in the orientation of the deformation tensor, resulted from smoothing the density field on different mass scales, we show that the large-scale tidal field can strongly affect the morphology and orientation of density peaks. The measure of the strength of the tidal field is performed as a function of the distance to the peak and of the spectral index. We detected evidence that two populations of perturbations seems to coexist; one, with a misalignment between the main axes of their inertia and deformation tensors. This would lead to the angular momentum acquisition and morphological changes. For the second population, the perturbations are found nearly aligned in the direction of the tidal field, which would imprint them low angular momentum and which would allow an alignment of structures as those reported between clusters of galaxies in filaments, and between galaxies in clusters. Evidence is presented that the correlation between the orientation of perturbations and the large-scale density field could be a common property of Gaussian density fields with spectral indexes $n < 0$. We argue that alignment of structures can be used to probe the flatness of the spectrum on large scales but it cannot determine the exact value of the spectral index.

  5. Pasture and Soil Management Following Tidal Saltwater Intrusion

    E-Print Network [OSTI]

    Provin, Tony; Redmon, Larry; McFarland, Mark L.; Feagley, Sam E.

    2009-05-26T23:59:59.000Z

    When land is flooded by saltwater, as after a hurricane tidal surge, it can long-term effects on soil productivity and fertility. This publication explains how to reclaim flooded pasture land. Having soil tested for salinity is an important step....

  6. Overview of Ocean Wave and Tidal Energy Lingchuan Mei

    E-Print Network [OSTI]

    Lavaei, Javad

    Overview of Ocean Wave and Tidal Energy Lingchuan Mei Department of Electrical Engineering Columbia with the climate change has led us to the exploration of new renewable energy in the past few decades. Oceans of this paper is to briefly overview the technology development of the ocean energy exploration, focusing on two

  7. Island Political Economy Geoff Bertram & Bernard Poirine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    323 Chapter 10 Island Political Economy Geoff Bertram & Bernard Poirine Introduction In this chapter we build on the observation that island economies, and especially small ones (population below one of development strategies. Common elements of "islandness" may serve to define island economies as a general

  8. Long Island Solar Farm Project Overview

    E-Print Network [OSTI]

    Ohta, Shigemi

    Long Island Solar Farm #12;Project Overview The Long Island Solar Farm (LISF) is a 32-megawatt. Project Developer/Owner/Operator: Long Island Solar Farm, LLC (BP Solar & MetLife) Purchaser of Power and construct arrays ~ 2 years of output (88,000 MWh equivalent) Long Island Solar Farm #12;Other Pollutants

  9. The State of Coral Reef Ecosystems of the Republic of the Marshall Islands MarshallIslands

    E-Print Network [OSTI]

    Queensland, University of

    The State of Coral Reef Ecosystems of the Republic of the Marshall Islands 387 MarshallIslands The State of Coral Reef Ecosystems of the Republic of the Marshall Islands Maria Beger1 , Dean Jacobson22 (1,940,000 mi2 ), the Republic of the Marshall Islands (RMI) is comprised of 1,225 islands

  10. EIS-0006: Wind Turbine Generator System, Block Island, Rhode Island

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy prepared this EIS to evaluate the environmental impacts of installing and operating a large experimental wind turbine, designated the MOD-OA, which is proposed to be installed on a knoll in Rhode Island's New Meadow Hill Swamp, integrated with the adjacent Block Island Power Company power plant and operated to supply electricity to the existing utility network.

  11. Effects of Tidal Turbine Noise on Fish Task 2.1.3.2: Effects on Aquatic Organisms: Acoustics/Noise - Fiscal Year 2011 - Progress Report - Environmental Effects of Marine and Hydrokinetic Energy

    SciTech Connect (OSTI)

    Halvorsen, Michele B.; Carlson, Thomas J.; Copping, Andrea E.

    2011-09-30T23:59:59.000Z

    Naturally spawning stocks of Chinook salmon (Oncorhynchus tshawytscha) that utilize Puget Sound are listed as threatened (http://www.nwr.noaa.gov/ESA-Salmon-Listings/Salmon-Populations/ Chinook/CKPUG.cfm). Plans exist for prototype tidal turbines to be deployed into their habitat. Noise is known to affect fish in many ways, such as causing a threshold shift in auditory sensitivity or tissue damage. The characteristics of noise, its spectra and level, are important factors that influence the potential for the noise to injure fish. For example, the frequency range of the tidal turbine noise includes the audiogram (frequency range of hearing) of most fish. This study (Effects on Aquatic Organisms, Subtask 2.1.3.2: Acoustics) was performed during FY 2011 to determine if noise generated by a 6-m-diameter open-hydro turbine might affect juvenile Chinook salmon hearing or cause barotrauma. After they were exposed to simulated tidal turbine noise, the hearing of juvenile Chinook salmon was measured and necropsies performed to check for tissue damage. Experimental groups were (1) noise exposed, (2) control (the same handling as treatment fish but without exposure to tidal turbine noise), and (3) baseline (never handled). Preliminary results indicate that low levels of tissue damage may have occurred but that there were no effects of noise exposure on the auditory systems of the test fish.

  12. No Company Is An Island

    E-Print Network [OSTI]

    Maddox, A.

    No company is an island. Utilities and their industrial customers are discovering that collaboration can breed opportunity while isolation can lead to ruin. Inter company relationships have changed over recent years and HL&P and its customers...

  13. Pacific Islands Region News Release

    E-Print Network [OSTI]

    Pacific Islands Region News Release Contact: Wende Goo FOR IMMEDIATE RELEASE 808-721-4098 May 27 of these unique twins by contributing more than 100 hours of work to construct a holding pen for the young seal

  14. Climate Action Plan (Rhode Island)

    Broader source: Energy.gov [DOE]

    In the fall of 2001, the Department of Environmental Management (DEM), the RI State Energy Office (SEO), and the Governor's office convened the Rhode Island Greenhouse Gas Stakeholder Project in...

  15. The Long Island Solar Farm

    Broader source: Energy.gov [DOE]

    In November 2011, a utility-scale solar array became operational in the most unlikely of places: at Brookhaven National Laboratory on densely populated Long Island, New York. Now the largest...

  16. achieve uniform sound: Topics by E-print Network

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

    and Sound Renderer Computer Technologies and Information Sciences Websites Summary: sound waves propagation is achieved by the ECHO module using an original hierarchical radiant...

  17. aggregate sound velocities: Topics by E-print Network

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

    an acoustic loop filter Physics Websites Summary: observation of negative group velocity propagation of sound waves through an asymmetric loop filterSound beyond the speed of...

  18. Analysis Procedure And Equipment For Deep Geoelectrical Soundings...

    Open Energy Info (EERE)

    Soundings In Noisy Areas Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Analysis Procedure And Equipment For Deep Geoelectrical Soundings...

  19. Physical Consonance Law of Sound Waves

    E-Print Network [OSTI]

    Mario Goto

    2005-06-16T23:59:59.000Z

    Sound consonance is the reason why it is possible to exist music in our life. However, rules of consonance between sounds had been found quite subjectively, just by hearing. To care for, the proposal is to establish a sound consonance law on the basis of mathematical and physical foundations. Nevertheless, the sensibility of the human auditory system to the audible range of frequencies is individual and depends on a several factors such as the age or the health in a such way that the human perception of the consonance as the pleasant sensation it produces, while reinforced by an exact physical relation, may involves as well the individual subjective feeling.

  20. Sound Science: Taking Action with Acoustics

    SciTech Connect (OSTI)

    Sinha, Dipen

    2014-07-16T23:59:59.000Z

    From tin whistles to sonic booms, sound waves interact with each other and with the medium through which they travel. By observing these interactions, we can identify substances that are hidden in sealed containers and obtain images of buried objects. By manipulating the ability of sound to push matter around, we can create novel structures and unique materials. Join the Lab's own sound hound, Dipen Sinha, as he describes how he uses fundamental research in acoustics for solving problems in industry, security and health.

  1. Sound Science: Taking Action with Acoustics

    ScienceCinema (OSTI)

    Sinha, Dipen

    2014-07-21T23:59:59.000Z

    From tin whistles to sonic booms, sound waves interact with each other and with the medium through which they travel. By observing these interactions, we can identify substances that are hidden in sealed containers and obtain images of buried objects. By manipulating the ability of sound to push matter around, we can create novel structures and unique materials. Join the Lab's own sound hound, Dipen Sinha, as he describes how he uses fundamental research in acoustics for solving problems in industry, security and health.

  2. Nonlinear Sound during Granular Impact

    E-Print Network [OSTI]

    Abram H. Clark; Alec J. Petersen; Lou Kondic; R. P. Behringer

    2014-08-08T23:59:59.000Z

    How do dynamic stresses propagate in granular material after a high-speed impact? This occurs often in natural and industrial processes. Stress propagation in a granular material is controlled by the inter-particle force law, $f$, in terms of particle deformation, $\\delta$, often given by $f\\propto\\delta^{\\alpha}$, with $\\alpha>1$. This means that a linear wave description is invalid when dynamic stresses are large compared to the original confining pressure. With high-speed video and photoelastic grains with varying stiffness, we experimentally study how forces propagate following an impact and explain the results in terms of the nonlinear force law (we measure $\\alpha\\approx 1.4$). The spatial structure of the forces and the propagation speed, $v_f$, depend on a dimensionless parameter, $M'=t_cv_0/d$, where $v_0$ is the intruder speed at impact, $d$ is the grain diameter, and $t_c$ is a binary collision time between grains with relative speed $v_0$. For $M'\\ll 1$, propagati ng forces are chain-like, and the measured $v_f \\propto d/t_c\\propto v_b(v_0/v_b)^\\frac{\\alpha-1}{\\alpha+1}$, where $v_b$ is the bulk sound speed. For larger $M'$, the force response has a 2D character, and forces propagate faster than predicted by $d/t_c$ due to collective stiffening of a packing.

  3. Site response at Treasure and Yerba Buena Islands, California

    E-Print Network [OSTI]

    Baise, L G; Glaser, Steven D; Dreger, D

    2003-01-01T23:59:59.000Z

    array at the Treasure Island Naval Station. ’’ Loma Prietadamage in Oakland, Treasure Island, and San Francisco. ’’C. H. ?1969?. ‘‘Treasure Island ?ll. ’’ Bay mud developments

  4. Puget Sound Energy- Resource Conservation Manager Program

    Broader source: Energy.gov [DOE]

    Puget Sound Energy's (PSE) Resource Conservation Manager Program (RCM) provides funding and support to customers who hire a RCM. The role of an RCM is to increase efficiency by focusing on...

  5. Cutting sound enhancement system for mining machines

    DOE Patents [OSTI]

    Leigh, Michael C. (Coal Center, PA); Kwitowski, August J. (Clairton, PA)

    1992-01-01T23:59:59.000Z

    A cutting sound enhancement system (10) for transmitting an audible signal from the cutting head (101) of a piece of mine machinery (100) to an operator at a remote station (200), wherein, the operator using a headphone unit (14) can monitor the difference in sounds being made solely by the cutting head (101) to determine the location of the roof, floor, and walls of a coal seam (50).

  6. Merged Sounding Value-Added Product

    SciTech Connect (OSTI)

    Troyan, D

    2010-03-03T23:59:59.000Z

    The Merged Sounding value-added product (VAP) uses a combination of observations from radiosonde soundings, the microwave radiometer (MWR), surface meteorological instruments, and European Centre for Medium-Range Weather Forecasts (ECMWF) model output with a sophisticated scaling/interpolation/smoothing scheme in order to define profiles of the atmospheric thermodynamic state at one-minute temporal intervals and a total of 266 altitude levels.

  7. Spatial motion of the Magellanic Clouds. Tidal models ruled out?

    E-Print Network [OSTI]

    Ruzicka, Adam; Palous, Jan

    2008-01-01T23:59:59.000Z

    Recently, Kallivayalil et al. derived new values of the proper motion for the Large and Small Magellanic Clouds (LMC and SMC, respectively). The spatial velocities of both Clouds are unexpectedly higher than their previous values resulting from agreement between the available theoretical models of the Magellanic System and the observations of neutral hydrogen (HI) associated with the LMC and the SMC. Such proper motion estimates are likely to be at odds with the scenarios for creation of the large-scale structures in the Magellanic System suggested so far. We investigated this hypothesis for the pure tidal models, as they were the first ones devised to explain the evolution of the Magellanic System, and the tidal stripping is intrinsically involved in every model assuming the gravitational interaction. The parameter space for the Milky Way (MW)-LMC-SMC interaction was analyzed by a robust search algorithm (genetic algorithm) combined with a fast restricted N-body model of the interaction. Our method extended ...

  8. Atmospheric heat redistribution and collapse on tidally locked rocky planets

    E-Print Network [OSTI]

    Wordsworth, Robin

    2014-01-01T23:59:59.000Z

    Atmospheric collapse is likely to be of fundamental importance to tidally locked rocky exoplanets but remains understudied. Here, general results on the heat transport and stability of tidally locked terrestrial-type atmospheres are reported. First, the problem is modeled with an idealized 3D general circulation model (GCM) with gray gas radiative transfer. It is shown that over a wide range of parameters the atmospheric boundary layer, rather than the large-scale circulation, is the key to understanding the planetary energy balance. Through a scaling analysis of the interhemispheric energy transfer, theoretical expressions for the day-night temperature difference and surface wind speed are created that reproduce the GCM results without tuning. Next, the GCM is used with correlated-k radiative transfer to study heat transport for two real gases (CO2 and CO). For CO2, empirical formulae for the collapse pressure as a function of planetary mass and stellar flux are produced, and critical pressures for atmospher...

  9. Accumulation of mercury and PCBs in quillback rockfish (Sebastes maliger) from Puget Sound, Washington, USA

    SciTech Connect (OSTI)

    West, J.E.; O`Neill, S.M. [Washington State Dept. of Fish and Wildlife, Olympia, WA (United States)

    1995-12-31T23:59:59.000Z

    The Washington Department of Fish and Wildlife is conducting a long-term study designed to identify and monitor levels of contaminants in Puget Sound fish resources as one component of the ongoing Puget Sound Ambient Monitoring Program (PSAMP). Here the authors summarize results from three years of monitoring contaminants in quillback rockfish (Sebastes maliger) and present models for bioaccumulation of persistent pollutants. This species was selected for monitoring because they are long-lived and nonmigratory, occupy a relatively high position in the demersal food web, and are important to Washington fisheries. Muscle tissue from quillback rockfish was sampled from 1991 through 1993 at three PSAMP stations in the Puget Sound (San Juan Islands [SJI], North-Central Puget Sound [NCPS] and Central Puget Sound [CPS]). Two persistent pollutants--mercury and polychlorinated biphenyls (PCBS)--were present consistently in quillback rockfish. Maximum concentrations of mercury in composite-samples were 0.51, 0.41 and 0.47 mg/kg for SJI, NCPS and CPS, respectively. One composite exceeded the World Health Organization action limit for mercury in fish tissue (0.5 mg/kg). The US Environmental Protection Agency (EPA) screening level for mercury in fish is 0.6 mg/kg. Seven composite-samples contained a single group of PCBs (aroclor 1260) which exceeded the EPA screening level for total aroclors (10 {micro}g/kg). Stepwise linear regression was used to model the effects of fish age, size, percent lipids, and collection site on accumulation of mercury and aroclor 1260 in quillback rockfish. Of these variables, age and length (as growth rate) of rockfish were the primary determinants of mercury concentration in quillback rockfish; age of rockfish and collection site were the primary determinants of PCB concentrations.

  10. Sound art and spatial practices : situating sound installation art since 1958

    E-Print Network [OSTI]

    Ouzounian, Gascia

    2008-01-01T23:59:59.000Z

    the interior and exterior spaces as well as visuallydo not represent exterior space, but were conceived andexterior architecture. Varèse claimed that: Densil Cabrera, “Sound Space and

  11. Orbital motions as gradiometers for post-Newtonian tidal effects

    E-Print Network [OSTI]

    Lorenzo Iorio

    2014-07-31T23:59:59.000Z

    The direct long-term changes occurring in the orbital dynamics of a local gravitationally bound binary system $S$ due to the post-Newtonian tidal acceleration caused by an external massive source are investigated. A class of systems made of a test particle $m$ rapidly orbiting with orbital frequency $n_{\\rm b}$ an astronomical body of mass $M$ which, in turn, slowly revolves around a distant object of mass $M^{'}$ with orbital frequency $n_{\\rm b}^{'}\\ll n_{\\rm b}$ is considered. The characteristic frequencies of the non-Keplerian orbital variations of $m$ and of $M$ itself are assumed to be negligible with respect to both $n_{\\rm b}$ and $n_{\\rm b}^{'}$. General expressions for the resulting Newtonian and post-Newtonian tidal orbital shifts of $m$ are obtained. The future missions BepiColombo and JUICE to Mercury and Ganymede, respectively, are considered in view of a possible detection. The largest effects, of the order of $\\approx 0.1-0.5$ milliarcseconds per year (mas yr$^{-1}$), occur for the Ganymede orbiter of the JUICE mission. Although future improvements in spacecraft tracking and orbit determination might, perhaps, reach the required sensitivity, the systematic bias represented by the other known orbital perturbations of both Newtonian and post-Newtonian origin would be overwhelming. The realization of a dedicated artificial mini-planetary system to be carried onboard and Earth-orbiting spacecraft is considered as well. Post-Newtonian tidal precessions as large as $\\approx 1-10^2$ mas yr$^{-1}$ could be obtained, but the quite larger Newtonian tidal effects would be a major source of systematic bias because of the present-day percent uncertainty in the product of the Earth's mass times the Newtonian gravitational parameter.

  12. Investigation of tidal power, Cobscook Bay, Maine. Environmental Appendix

    SciTech Connect (OSTI)

    Not Available

    1980-08-01T23:59:59.000Z

    This report presents information regarding existing terrestrial and marine resources and water quality conditions in the Cobscook Bay area. A preliminary assessment of impacts from a tidal power project is also presented and data gaps are identified. Reports contained in the appendix were prepared by the U.S. Fish and Wildlife Service, the National Marine Fisheries Service, the University of Maine at Orino, School of Forestry Resources and the U.S. Army Corps of Engineers.

  13. Modeling Tidal Streams in evolving dark matter halos

    E-Print Network [OSTI]

    Jorge Penarrubia; Andrew J. Benson; David Martinez-Delgado; Hans-Walter Rix

    2005-12-20T23:59:59.000Z

    We explore whether stellar tidal streams can provide information on the secular, cosmological evolution of the Milky Way's gravitational potential and on the presence of subhalos. We carry out long-term (~t_hubble) N-body simulations of disrupting satellite galaxies in a semi-analytic Galaxy potential where the dark matter halo and the subhalos evolve according to a LCDM cosmogony. All simulations are constrained to end up with the same position and velocity at present. Our simulations account for: (i) the secular evolution of the host halo's mass, size and shape, (ii) the presence of subhalos and (iii) dynamical friction. We find that tidal stream particles respond adiabatically to the Galaxy growth so that, at present, the energy and angular momentum distribution is exclusively determined by the present Galaxy potential. In other words, all present-day observables can only constrain the present mass distribution of the Galaxy independent of its past evolution. We also show that, if the full phase-space distribution of a tidal stream is available, we can accurately determine (i) the present Galaxy's shape and (ii) the amount of mass loss from the stream's progenitor, even if this evolution spanned a cosmologically significant epoch.

  14. The mass-metallicity relation of tidal dwarf galaxies

    E-Print Network [OSTI]

    Recchi, S; Ploeckinger, S

    2015-01-01T23:59:59.000Z

    Dwarf galaxies generally follow a mass-metallicity (MZ) relation, where more massive objects retain a larger fraction of heavy elements. Young tidal dwarf galaxies (TDGs), born in the tidal tails produced by interacting gas-rich galaxies, have been thought to not follow the MZ relation, because they inherit the metallicity of the more massive parent galaxies. We present chemical evolution models to investigate if TDGs that formed at very high redshifts, where the metallicity of their parent galaxy was very low, can produce the observed MZ relation. Assuming that galaxy interactions were more frequent in the denser high-redshift universe, TDGs could constitute an important contribution to the dwarf galaxy population. The survey of chemical evolution models of TDGs presented here captures for the first time an initial mass function (IMF) of stars that is dependent on both the star formation rate and the gas metallicity via the integrated galactic IMF (IGIMF) theory. As TDGs form in the tidal debris of interacti...

  15. Effects of macrofauna on acoustic backscatter from the seabed: Field manipulations in West Sound, Orcas Island,

    E-Print Network [OSTI]

    Jumars, Pete

    nuttali, from bait used as chum for fishes and crabs, and from tethered crabs (Cancer magister); other treatments showed no significant change. All of the effective treatments involved increased backscatter analysis and geoacoustic modeling suggest that failure of other treatments to show significant effects

  16. SPAWNING AND SETTING OF OYSTERS IN LONG ISLAND SOUND IN 1937, AND DISCUSSION OF THE

    E-Print Network [OSTI]

    seed oysters transplanted to other waters, as well as their rapid growth in a new environment. Heavy. Do. Do. Medium. Heavy. Do. Do. Medium. Failure. Heavy. Medium. Year 190L __ __ . 1902 __ 1903

  17. Tidal Heating of Terrestrial Extra-Solar Planets and Implications for their Habitability

    E-Print Network [OSTI]

    Brian Jackson; Rory Barnes; Richard Greenberg

    2008-08-20T23:59:59.000Z

    The tidal heating of hypothetical rocky (or terrestrial) extra-solar planets spans a wide range of values depending on stellar masses and initial orbits. Tidal heating may be sufficiently large (in many cases, in excess of radiogenic heating) and long-lived to drive plate tectonics, similar to the Earth's, which may enhance the planet's habitability. In other cases, excessive tidal heating may result in Io-like planets with violent volcanism, probably rendering them unsuitable for life. On water-rich planets, tidal heating may generate sub-surface oceans analogous to Europa's with similar prospects for habitability. Tidal heating may enhance the outgassing of volatiles, contributing to the formation and replenishment of a planet's atmosphere. To address these issues, we model the tidal heating and evolution of hypothetical extra-solar terrestrial planets. The results presented here constrain the orbital and physical properties required for planets to be habitable.

  18. Biofuel Feedstock Inter-Island Transportation

    E-Print Network [OSTI]

    Biofuel Feedstock Inter-Island Transportation Prepared for the U.S. Department of Energy Office ........................................................................... 11 Options for liquid biofuel feedstock transport ............................................................................. agency thereof. #12;A Comparison of Hawaii's Inter-Island Maritime Transportation of Solid Versus Liquid

  19. REAP Islanded Grid Wind Power Conference

    Broader source: Energy.gov [DOE]

    Hosted by Renewable Energy Alaska Project, this three-day conference will show attendees how to learn, network, and share information on wind systems in island and islanded grid environments through expert panel discussions, stakeholder dialogue, and training.

  20. Islands and Our Renewable Energy Future (Presentation)

    SciTech Connect (OSTI)

    Baring-Gould, I.; Gevorgian, V.; Kelley, K.; Conrad, M.

    2012-05-01T23:59:59.000Z

    Only US Laboratory Dedicated Solely to Energy Efficiency and Renewable Energy. High Contribution Renewables in Islanded Power Systems.

  1. A comparison of measured and modeled tidal currents in the Gulf of Maine

    E-Print Network [OSTI]

    Cook, Michael S

    1990-01-01T23:59:59.000Z

    of Advisory Committee; Dr. David A. Brooks A modified version of the National Ocean Survey harmonic analysis computer program was used to extract the tidal signal from current meter records at five mooring stations (present stations) collected during four... summer periods in the Gulf of Maine. The results showed that the dominant tidal current constituent at all stations was the M2 constituent. The M2 tidal currents at each present station were vertically-averaged using a depth-weighting scheme...

  2. Medical Remote Monitoring using sound environment analysis and wearable sensors 1 Medical Remote Monitoring using sound

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Medical Remote Monitoring using sound environment analysis and wearable sensors 1 X Medical Remote Monitoring using sound environment analysis and wearable sensors Dan Istrate1, Jérôme Boudy2, Hamid Medjahed1. In Europe, for example, the life expectancy for men is about 71 years and for women about 79 years

  3. The Unusual Tidal Dwarf Candidate in the Merger System NGC 3227/6: Star Formation in a Tidal Shock?

    E-Print Network [OSTI]

    Carole G. Mundell; Phil A. James; Nora Loiseau; Eva Schinnerer; Duncan A. Forbes; ;

    2004-07-07T23:59:59.000Z

    We report the discovery of active star formation in the HI cloud associated with the interacting Seyfert system NGC 3227/NGC 3226 that was originally identified as a candidate tidal dwarf galaxy (TDG) by Mundell et al. and that we name J1023+1952. We present the results of broad-band BRIJHK and ultraviolet imaging that show the HI cloud is associated with massive on-going star formation seen as a cluster of blue knots (M_B < -15.5 mag) surrounded by a diffuse ultraviolet halo and co-spatial with a ridge of high column density neutral hydrogen its southern half. We also detect Ha emission from the knots with a flux density corresponding to a star-formation rate of SFR~0.011 Msun per yr. Although J1023+1952 spatially overlaps the edge of the disk of NGC 3227, it has a mean HI velocity 150 km/s higher than that of NGC 3227 so is kinematically distinct; comparison of ionized and neutral gas kinematics in the star-forming region show closely matched velocities, providing strong evidence that the knots are embedded in J1023+1952 and do not merely lie behind in the disk of NGC 3227, thus confirming J1023+1952 as a gas-rich dwarf galaxy. We discuss two scenarios for the origin of J1023+1952; as a third, pre-existing dwarf galaxy involved in the interaction with NGC 3227 and NGC 3226, or a newly-forming dwarf galaxy condensing out of the tidal debris removed from the gaseous disk of NGC 3227. Given the lack of a detectable old stellar population, a tidal origin is more likely. If J1023+1952 is a bound object forming from returning gaseous tidal tail material, we infer a dynamically young age similar to its star-formation age, and suggests it is in the earliest stages of TDG evolution. Whatever the origin of J1023+1952 we suggest that its star formation is shock-triggered by collapsing tidal debris. (Abridged)

  4. ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM

    E-Print Network [OSTI]

    ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1959 :y .iiJA/i-3ri ^' WUUUi. ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1959 by Paul D. Zimmer, Clifton and observations 10 Summary 13 #12;#12;ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON

  5. ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM

    E-Print Network [OSTI]

    ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON 1960 . SPECIAL SCIENTIFIC ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1960 by Paul D. Zimmer and Clifton C. Davidson United States Fish This annual report of fishway operations at Rock Island Dam in 1960 is dedicated to the memory of co

  6. ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM

    E-Print Network [OSTI]

    42) ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON 1961 Marine Biological. McKeman, Director ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1961--Fisheries No. 421 Washington, D. C. April 1962 #12;Rock Island Dam, Columbia River, Washington ii #12;CONTENTS

  7. Annual Fish Passage Report -Rock Island Dam

    E-Print Network [OSTI]

    Annual Fish Passage Report - Rock Island Dam Columbia River, Washington, 1965 By Paul D. Zimmer L. McKeman, Director Annual Fish Passage Report - Rock Island Dam Columbia River, Washington, 1965;#12;Annual Fish Passage Report - Rock Island Dam Columbia River, Washington, 1965 By PAUL D. ZIMMER, Fishery

  8. Close Encounters Treasure Island: Sequencing Moorea

    E-Print Network [OSTI]

    Wildermuth, Mary C

    Close Encounters Also... Treasure Island: Sequencing Moorea Devon Zagory on Food Safety College Features 12 CLOSE ENCOUNTERS by Claire Cain Miller Passing earth science to the next generation 20 TREASURE ISLAND by Erika Check Barcoding CNR's island research station Departments 2 L

  9. Modeling the Effects of Tidal Energy Extraction on Estuarine Hydrodynamics in a Stratified Estuary

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping

    2013-08-15T23:59:59.000Z

    A three-dimensional coastal ocean model with a tidal turbine module was used in this paper to study the effects of tidal energy extraction on temperature and salinity stratification and density driven two-layer estuarine circulation. Numerical experiments with various turbine array configurations were carried out to investigate the changes in tidally mean temperature, salinity and velocity profiles in an idealized stratified estuary that connects to coastal water through a narrow tidal channel. The model was driven by tides, river inflow and sea surface heat flux. To represent the realistic size of commercial tidal farms, model simulations were conducted based on a small percentage of the total number of turbines that would generate the maximum extractable energy in the system. Model results indicated that extraction of tidal energy will increase the vertical mixing and decrease the stratification in the estuary. Extraction of tidal energy has stronger impact on the tidally-averaged salinity, temperature and velocity in the surface layer than the bottom. Energy extraction also weakens the two-layer estuarine circulation, especially during neap tides when tidal mixing the weakest and energy extraction is the smallest. Model results also show that energy generation can be much more efficient with higher hub height with relatively small changes in stratification and two-layer estuarine circulation.

  10. Ocean Tidal Dissipation and its Role in Solar System Satellite Evolution

    E-Print Network [OSTI]

    Chen, Erinna

    2013-01-01T23:59:59.000Z

    dominant contributor to the ocean energy dissipation (see §dominant contributor to the ocean energy dissipation (see §of interest, e.g. the ocean kinetic energy and tidal

  11. MECHANISMS GENERATING MODIFICATION OF BENTHOS FOLLOWING TIDAL FLAT INVASION BY A SPARTINA HYBRID

    E-Print Network [OSTI]

    Neira, Carlos; Grosholz, Edwin D; Levin, Lisa A; Blake, Rachael

    2006-01-01T23:59:59.000Z

    1997. Kinetics of tidal resuspension of microbiota: testingare susceptible to resuspension following bio- turbation (in barnacle recruitment and resuspension of adult benthic

  12. Mechanisms generating modification of benthos following tidal flat invasion by a Spartina hybrid

    E-Print Network [OSTI]

    Neira, C; Grosholz, E D; Levin, L A; Blake, R

    2006-01-01T23:59:59.000Z

    1997. Kinetics of tidal resuspension of microbiota: testingare susceptible to resuspension following bio- turbation (in barnacle recruitment and resuspension of adult benthic

  13. Simple method for calculating island widths

    SciTech Connect (OSTI)

    Cary, J.R. (Department of Astrophysical, Planetary, and Atmospheric Sciences, and Department of Physics, University of Colorado, Boulder, Colorado 80309-0391 (USA)); Hanson, J.D. (Department of Physics, Auburn University, Auburn, Alabama 36849 (USA))

    1991-04-01T23:59:59.000Z

    A simple method for calculating magnetic island widths has been developed. This method uses only that information obtained from integrating along the closed field line at the island center. Thus, this method is computationally less intensive than the usual method of producing surfaces of section of sufficient detail to locate and resolve the island separatrix. This method has been implemented numerically and used to analyze the buss work islands of ATF (Fusion Technol. {bold 10}, 179 (1986)). In this case the method proves to be accurate to at least within 20% even though the islands are within a factor of 2 of overlapping.

  14. Spectral analyses of avian heart value sounds

    E-Print Network [OSTI]

    Jeyaseelan, Prithika

    1993-01-01T23:59:59.000Z

    septum gives rise to a small positive R wave in the elctrocardiogram. The depolarization wave moves upwards along the walls ol' the right and left ventri- cles, giving rise to the S wave in the electrocardiogram. Ventricular depolarization lasts.... The fourth sound is fused with the first in individuals having a short P-R interval in the EGG. In rare cs. ses a third component caused by the presystolic tensing of the AV valves had been recorded (19). A fifth sound occurs in some cases after the third...

  15. Sound Geothermal Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt LtdShawangunk, NewSingaporeSonix Japan Inc Jump to:Sound Beach, New York:Sound

  16. Tilted accretion discs in cataclysmic variables: tidal instabilities and superhumps

    E-Print Network [OSTI]

    J. R. Murray; P. J. Armitage

    1998-09-10T23:59:59.000Z

    We investigate the growth of tidal instabilities in accretion discs in a binary star potential, using three dimensional numerical simulations. As expected from analytic work, the disc is prone to an eccentric instability provided that it is large enough to extend to the 3:1 resonance. The eccentric disc leads to positive superhumps in the light curve. It has been proposed that negative superhumps might arise from a tilted disc, but we find no evidence that the companion gravitational tilt instability can grow fast enough in a fluid disc to create a measurable inclination. The origin of negative superhumps in the light curves of cataclysmic variables remains a puzzle.

  17. Pulse Tidal formerly Pulse Generation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form History Facebook icon TwitterZip JumpProwindPuda Coal IncPulse Tidal

  18. MHK Projects/BW2 Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformation Other4Q07)AK ProjectMS ProjectJerseyBW2 Tidal

  19. MHK Projects/Orient Point Tidal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformationCygnet <|Galway Bay IE <Orcadian WaveTidal

  20. MHK Technologies/KESC Tidal Generator | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose Bend < MHK ProjectsFlagship <HelixKESC Tidal Generator <

  1. MHK Technologies/TidalStar | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose Bend < MHKconverter < MHKDUCK <TidalStar < MHK

  2. Tidal Stream Power Web GIS Tool | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldson Ethanol LLCEnergyoThornwood,TianfuTidal Sails AS Jump

  3. Magnetic island evolution in hot ion plasmas

    SciTech Connect (OSTI)

    Ishizawa, A.; Nakajima, N. [National Institute for Fusion Science, Toki 509-5292 (Japan); Waelbroeck, F. L.; Fitzpatrick, R.; Horton, W. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)

    2012-07-15T23:59:59.000Z

    Effects of finite ion temperature on magnetic island evolution are studied by means of numerical simulations of a reduced set of two-fluid equations which include ion as well as electron diamagnetism in slab geometry. The polarization current is found to be almost an order of magnitude larger in hot than in cold ion plasmas, due to the strong shear of ion velocity around the separatrix of the magnetic islands. As a function of the island width, the propagation speed decreases from the electron drift velocity (for islands thinner than the Larmor radius) to values close to the guiding-center velocity (for islands of order 10 times the Larmor radius). In the latter regime, the polarization current is destabilizing (i.e., it drives magnetic island growth). This is in contrast to cold ion plasmas, where the polarization current is generally found to have a healing effect on freely propagating magnetic island.

  4. Changes in Beachface Bed Elevation over a Tidal Cycle on Santa Rosa Island, Florida and Matagorda, Texas 

    E-Print Network [OSTI]

    Barrett, Gemma

    2009-06-09T23:59:59.000Z

    Wave-scale changes in beach elevation were measured using a cross-shore array of ultrasonic distance sensors on a dissipative beach at Matagorda Peninsula, Texas, in December 2008. The data collected in this study are compared to data collected in a...

  5. A Tidal Hydrology Assessment for Reconnecting Spring Branch Creek to Suisun Marsh, Solano County CA: Predicting the Impact to the Federally Listed Plant Soft Bird's Beak

    E-Print Network [OSTI]

    Olson, Jessica J.

    2011-01-01T23:59:59.000Z

    this study. Changes in hydrology are not the only potentialA Tidal Hydrology Assessment for Reconnecting Spring Branchmay change the tidal hydrology and impact the area occupied

  6. Travel Diary-Based Emissions Analysis of Telecommuting for the Puget Sound Demonstration Project

    E-Print Network [OSTI]

    Henderson, Dennis K; Koenig, Brett E; Mokhtarian, Patricia L

    1994-01-01T23:59:59.000Z

    B. and P. L. Mokhtarian (1993) "Puget Sound TelecommutingQuaid, M. and B. Lagerberg (1992) "Puget Sound Telecommutingof Telecommuting for the Puget Sound Demonstration Project

  7. Review: Saving Puget Sound: A Conservation Strategy for the 21st Century by John Lombard

    E-Print Network [OSTI]

    Miller, Ryder W.

    2008-01-01T23:59:59.000Z

    Review: Saving Puget Sound: a Conservation Strategy for theUSA John Lombard. Saving Puget Sound: A Conservationan impassioned plea to save the Puget Sound region from the

  8. HAWAIIAN OCEAN MIXING EXPERIMENT (HOME): FARFIELD PROGRAM HAWAIIAN TIDAL ENERGY BUDGET

    E-Print Network [OSTI]

    Dushaw, Brian

    precision to quantify the tidal power dissipated in the nearfield of the Ridge. The data are vitalHAWAIIAN OCEAN MIXING EXPERIMENT (HOME): FARFIELD PROGRAM HAWAIIAN TIDAL ENERGY BUDGET Principal and ocean acoustic tomography have brought a new dimension to the subject. We propose to measure the energy

  9. Intracranial Pressure Variation Associated with Changes in End-Tidal CO2

    E-Print Network [OSTI]

    Intracranial Pressure Variation Associated with Changes in End-Tidal CO2 Sunghan Kim, James Mc that the partial pressure of arterial CO2 (PaCO2) can affect cerebral blood flow, cerebral blood volume, and therefore ICP. The end-tidal CO2 (ETCO2) is usually monitored by clinicians as a proxy for PaCO2. We show

  10. Continental Shelf Research 26 (2006) 13601374 Characterizing chaotic dispersion in a coastal tidal model

    E-Print Network [OSTI]

    LaCasce, Joseph H.

    2006-01-01T23:59:59.000Z

    Lyapunov exponents; Norwegian coast; Tidal currents 1. Introduction The coastal shelf is an important of Mathematics, University of Oslo, P.O. Box 1053, 0316 Blindern, Norway c Norwegian Meteorological Institute, P to study dispersion and mixing in a model in the Norwegian Trondheim fjord. We focus on the tidally driven

  11. Impact of sheep grazing on juvenile sea bass, Dicentrarchus labrax L., in tidal salt marshes

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Impact of sheep grazing on juvenile sea bass, Dicentrarchus labrax L., in tidal salt marshes P L., from sheep grazed and ungrazed tidal salt marshes were com- pared qualitatively. Juvenile sea bass colonise the salt marsh at ¯ood during 43% of the spring tides which inundate the salt

  12. Cross-shore suspended sediment transport under tidal currents Andrew J. Hogg1

    E-Print Network [OSTI]

    -mail: david@bpi.cam.ac.uk Abstract The transport of sediment over an intertidal mudflat by a cross-shore tidal lag and indicates that the cross-shore flows tend to accrete sediment on the intertidal mudflats and the amplitude of the tidal current. 1. Introduction Intertidal mudflats are extensive coastal regions

  13. On the dynamics and morphology of extensive tidal mudflats: Integrating remote sensing data

    E-Print Network [OSTI]

    Ezer,Tal

    On the dynamics and morphology of extensive tidal mudflats: Integrating remote sensing data sensing data and inundation models allows the mapping of extensive tidal mudflats in a sub-Arctic estuary changes in mudflats morphology, and 3. mapping previously unobserved mud- flat topographies in order

  14. Cross-shore sediment transport and the equilibrium morphology of mudflats under tidal currents

    E-Print Network [OSTI]

    Hogg, Andrew

    Cross-shore sediment transport and the equilibrium morphology of mudflats under tidal currents D of suspended sediment transport under cross-shore tidal currents on an intertidal mudflat. We employ; 4558 Oceanography: Physical: Sediment transport; KEYWORDS: estuaries, intertidal mudflats, intertidal

  15. ester Thurow says "what sounds sensible (export

    E-Print Network [OSTI]

    ester Thurow says "what sounds sensible (export more) when heard sepa- rately in each country becomes nonsense when aggregated around the world. No one can have more net exports unless someone else a strong relationship between exports and farm prosperity in the United States. From the early 1900s

  16. Demonstrations: sound source for Doppler shift

    E-Print Network [OSTI]

    Boal, David

    of the Universe Doppler effect The technique for measuring the velocities of very remote galaxies is based uponDemonstrations: ·sound source for Doppler shift ·big balloon and labels Text: Mod. Phys. 8.A, 8.B, 8.C Problems: 1, 3, 6, 7 from Ch. 8 What's important: ·Doppler shift ·Hubble's law ·age

  17. Dynamical resonance locking in tidally interacting binary systems

    E-Print Network [OSTI]

    Joshua Burkart; Eliot Quataert; Phil Arras

    2014-10-25T23:59:59.000Z

    We examine the dynamics of resonance locking in detached, tidally interacting binary systems. In a resonance lock, a given stellar or planetary mode is trapped in a highly resonant state for an extended period of time, during which the spin and orbital frequencies vary in concert to maintain the resonance. This phenomenon is qualitatively similar to resonance capture in planetary dynamics. We show that resonance locks can accelerate the course of tidal evolution in eccentric systems and also efficiently couple spin and orbital evolution in circular binaries. Previous analyses of resonance locking have not treated the mode amplitude as a fully dynamical variable, but rather assumed the adiabatic (i.e. Lorentzian) approximation valid only in the limit of relatively strong mode damping. We relax this approximation, analytically derive conditions under which the fixed point associated with resonance locking is stable, and further check these analytic results using numerical integrations of the coupled mode, spin, and orbital evolution equations. These show that resonance locking can sometimes take the form of complex limit cycles or even chaotic trajectories. We provide simple analytic formulae that define the binary and mode parameter regimes in which resonance locks of some kind occur (stable, limit cycle, or chaotic). We briefly discuss the astrophysical implications of our results for white dwarf and neutron star binaries as well as eccentric stellar binaries.

  18. Tidal deformation of a slowly rotating material body. I. External metric

    E-Print Network [OSTI]

    Landry, Philippe

    2015-01-01T23:59:59.000Z

    We construct the external metric of a slowly rotating, tidally deformed material body in general relativity. The tidal forces acting on the body are assumed to be weak and to vary slowly with time, and the metric is obtained as a perturbation of a background metric that describes the external geometry of an isolated, slowly rotating body. The tidal environment is generic and characterized by two symmetric-tracefree tidal moments E_{ab} and B_{ab}, and the body is characterized by its mass M, its radius R, and a dimensionless angular-momentum vector \\chi^a environment requires the introduction of four new quantities, which we designate as rotational-tidal Love numbers. All these Love numbers are gauge ...

  19. Pathogenicity island mobility and gene content.

    SciTech Connect (OSTI)

    Williams, Kelly Porter

    2013-10-01T23:59:59.000Z

    Key goals towards national biosecurity include methods for analyzing pathogens, predicting their emergence, and developing countermeasures. These goals are served by studying bacterial genes that promote pathogenicity and the pathogenicity islands that mobilize them. Cyberinfrastructure promoting an island database advances this field and enables deeper bioinformatic analysis that may identify novel pathogenicity genes. New automated methods and rich visualizations were developed for identifying pathogenicity islands, based on the principle that islands occur sporadically among closely related strains. The chromosomally-ordered pan-genome organizes all genes from a clade of strains; gaps in this visualization indicate islands, and decorations of the gene matrix facilitate exploration of island gene functions. A %E2%80%9Clearned phyloblocks%E2%80%9D method was developed for automated island identification, that trains on the phylogenetic patterns of islands identified by other methods. Learned phyloblocks better defined termini of previously identified islands in multidrug-resistant Klebsiella pneumoniae ATCC BAA-2146, and found its only antibiotic resistance island.

  20. Modeling Tidal Stream Energy Extraction and its Effects on Transport Processes in a Tidal Channel and Bay System Using a Three-dimensional Coastal Ocean Model

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea E.

    2013-02-28T23:59:59.000Z

    This paper presents a numerical modeling study for simulating in-stream tidal energy extraction and assessing its effects on the hydrodynamics and transport processes in a tidal channel and bay system connecting to coastal ocean. A marine and hydrokinetic (MHK) module was implemented in a three-dimensional (3-D) coastal ocean model using the momentum sink approach. The MHK model was validated with the analytical solutions for tidal channels under one-dimensional (1-D) conditions. Model simulations were further carried out to compare the momentum sink approach with the quadratic bottom friction approach. The effects of 3-D simulations on the vertical velocity profile, maximum extractable energy, and volume flux reduction across the channel were investigated through a series of numerical experiments. 3-D model results indicate that the volume flux reduction at the maximum extractable power predicted by the 1-D analytical model or two-dimensional (2-D) depth-averaged numerical model may be overestimated. Maximum extractable energy strongly depends on the turbine hub height in the water column, and which reaches a maximum when turbine hub height is located at mid-water depth. Far-field effects of tidal turbines on the flushing time of the tidal bay were also investigated. Model results demonstrate that tidal energy extraction has a greater effect on the flushing time than volume flux reduction, which could negatively affect the biogeochemical processes in estuarine and coastal waters that support primary productivity and higher forms of marine life.

  1. LEE-0152- In the Matter of Sound Oil Company

    Broader source: Energy.gov [DOE]

    On August 16, 1994, Sound Oil Company (Sound) of Seattle Washington, filed an Application for Exception with the Office of Hearings and Appeals of the Department of Energy. In its Application,...

  2. Floating Cities, Islands and States

    E-Print Network [OSTI]

    Bolonkin, Alexander

    2008-01-01T23:59:59.000Z

    Many small countries are in need of additional territory. They build landfills and expensive artificial islands. The ocean covers 71 per cent of the Earth surface. Those countries (or persons of wealth) starting the early colonization of the ocean may obtain advantages through additional territory or creating their own independent state. An old idea is building a big ship. The best solution to this problem, however, is the provision of floating cities, islands, and states. The author idea is to use for floating cities, islands, and states a cheap floating platform created from a natural ice field taken from the Arctic or Antarctic oceans. These cheap platforms protected by air-film (bottom and sides) and a conventional insulating cover (top) and having a cooling system can exist for an unlimited time. They can be increased in number or size at any time, float in warm oceans, travel to different continents and countries, serve as artificial airports, harbors and other marine improvements, as well as floating c...

  3. The Archeology of Relic Sound Waves J.R. Gladden

    E-Print Network [OSTI]

    Gladden, Josh

    The Archeology of Relic Sound Waves J.R. Gladden Assistant Professor of Physics University and results from this large body of work. I have found the recent article "Cosmic sound waves rule" by Daniel" in the movies aside). However, there was a time when sound waves filled the entire universe, and recent

  4. INFLUENCE OF SOUND WAVE STIMULATION ON THE GROWTH OF

    E-Print Network [OSTI]

    Boyer, Edmond

    INFLUENCE OF SOUND WAVE STIMULATION ON THE GROWTH OF STRAWBERRY IN SUNLIGHT GREENHOUSE Lirong Qi differences between the circumstances of the two sunlight greenhouses, the strawberry after the sound wave disease and insect pest were enhanced. The experiment results show that sound wave stimulation can

  5. ISIS, AN ALTERNATIVE APPROACH TO SOUND WAVES Clarence Barlow

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    ISIS, AN ALTERNATIVE APPROACH TO SOUND WAVES Clarence Barlow Royal Conservatoire Juliana van Sinusoids', is a means of mathematically interpolating sine wave segments between the samples of a sound wave recording (the word "sample" is here used as in "sample rate"). The sound wave is thus

  6. NOAA Support for Puget Sound Shellfish: Native Oysters, Abalone &

    E-Print Network [OSTI]

    NOAA Support for Puget Sound Shellfish: Native Oysters, Abalone & a Healthy Marine Habitatnoaa shellfish aquaculture and conservation in Puget Sound as part of NOAA's comprehensive strategy,000 to Rebuild Native Oysters in Puget Sound According to The Nature Conservancy, "shellfish reefs are the most

  7. UNCORRECTEDPROOF Profiles of Alexandrium catenella cysts in Puget Sound sediments

    E-Print Network [OSTI]

    Shull, David H.

    UNCORRECTEDPROOF Profiles of Alexandrium catenella cysts in Puget Sound sediments and the geographical scope of shellfish closures in Puget Sound have increased in recent decades. PSP, monitored by the Washington Department of Health, has spread from Sequim Bay in the 1950s into central Puget Sound in the 1970

  8. patible with the distribution and behavior of Puget Sound ratfish.

    E-Print Network [OSTI]

    patible with the distribution and behavior of Puget Sound ratfish. While no quantitative measurements were made of light intensity or wavelength, to the human eye, the water in Puget Sound is quite it is found closer to shore in Puget Sound than in other areas in its range. In summary, the data indicate

  9. Fish Foraging on an Artificial Reef in Puget Sound, Washington

    E-Print Network [OSTI]

    Fish Foraging on an Artificial Reef in Puget Sound, Washington GREGORY J. HUECKEL and R. LEE with an artificial reef in Puget Sound to increase our knowledge of the changes in the structure of the fish com with an artificial reef in Puget Sound, Wash. Stomachs ofthesefish species, dissectedfrom 609 fish speared on, around

  10. Ecology of Puget Sound Winter 2001: All Level Group Contract

    E-Print Network [OSTI]

    Thuesen, Erik V.

    - 1 - Ecology of Puget Sound Winter 2001: All Level Group Contract Faculty: Erik Thuesen (thuesene@evergreen.edu), Lab 1 3065 This program will investigate ecological interactions of the organisms in the Puget Sound in Puget Sound for hands-on observations and field work. There will be one multi-day field trip to Friday

  11. Structure-borne sound Flexural wave (bending wave)

    E-Print Network [OSTI]

    Berlin,Technische Universität

    1 Structure-borne sound · Flexural wave (bending wave) »One dimensional (beam) +(/x)dx +(/x)dx = (/x) (/x)dx=(2/x2)dx Mz +(Mz/x)dx Mz vy Fy Fy +(Fy/x)dx Structure-borne sound · Bending wave ­ flexural wave #12;2 Structure-borne sound · Two obliquely propagating waves + - + + - + - Structure

  12. Detection of aeroacoustic sound sources on aircraft and wind turbines

    E-Print Network [OSTI]

    Twente, Universiteit

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

  13. Computerised lung sound analysis to improve the specificity of paediatric

    E-Print Network [OSTI]

    Elhilali, Mounya

    Computerised lung sound analysis to improve the specificity of paediatric pneumonia diagnosis that pulmonary pathology can be differentiated from normal using computerised lung sound analysis (CLSA). The authors will record lung sounds from 600 children aged #5 years, 100 each with consolidative pneumonia

  14. A signature for turbulence driven magnetic islands

    SciTech Connect (OSTI)

    Agullo, O.; Muraglia, M.; Benkadda, S. [Aix-Marseille Université, CNRS, PIIM, UMR 7345 Marseille (France); France-Japan Magnetic Fusion Laboratory, LIA 336 CNRS, Marseille (France); Poyé, A. [Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence (France); Yagi, M. [Plasma Theory and Simulation Gr., JAEA, Rokkasho (Japan); Garbet, X. [IRFM, CEA, St-Paul-Lez-Durance 13108 (France); Sen, A. [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)

    2014-09-15T23:59:59.000Z

    We investigate the properties of magnetic islands arising from tearing instabilities that are driven by an interchange turbulence. We find that such islands possess a specific signature that permits an identification of their origin. We demonstrate that the persistence of a small scale turbulence maintains a mean pressure profile, whose characteristics makes it possible to discriminate between turbulence driven islands from those arising due to an unfavourable plasma current density gradient. We also find that the island poloidal turnover time, in the steady state, is independent of the levels of the interchange and tearing energy sources. Finally, we show that a mixing length approach is adequate to make theoretical predictions concerning island flattening in the island rotation frame.

  15. ANNUAL WIND DATA REPORT Thompson Island

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    ANNUAL WIND DATA REPORT Thompson Island March 1, 2002 ­ February 28, 2003 Prepared.................................................................................................................... 11 Wind Speed Time Series........................................................................................................... 11 Wind Speed Distributions

  16. WIND DATA REPORT Deer Island Outfall

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Deer Island Outfall August 18, 2003 ­ December 4, 2003 Prepared for Massachusetts...................................................................................................................... 7 Wind Speed Time Series............................................................................................................. 7 Wind Speed Distributions

  17. WIND DATA REPORT Deer Island Parking Lot

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    WIND DATA REPORT Deer Island Parking Lot May 1, 2003 ­ July 15, 2003 Prepared for Massachusetts...................................................................................................................... 7 Wind Speed Time Series............................................................................................................. 7 Wind Speed Distributions

  18. Nauru Island Effect Detection Data Set

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

    Long, Chuck

    During Nauru99 it was noted that the island was producing small clouds that advected over the ARM site. The Nauru Island Effect Study was run for 1.5 years and the methodology developed to detect the occurrence. Nauru ACRF downwelling SW, wind direction, and air temperature data are used, along with downwelling SW data from Licor radiometers located on the southern end of the island near the airport landing strip. A statistical analysis and comparison of data from the two locations is used to detect the likely occurrence of an island influence on the Nauru ACRF site data

  19. Pennsylvania Nuclear Profile - Three Mile Island

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

    Three Mile Island" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date"...

  20. Asian American Pacific Islander Heritage Month

    Broader source: Energy.gov [DOE]

    Generations of Asian Americans and Pacific Islanders (AAPIs) have helped make America what it is today. Their histories recall bitter hardships and proud accomplishments -- from the laborers who...

  1. Dendrochronology of Strain-Relaxed Islands

    SciTech Connect (OSTI)

    Merdzhanova, T.; Kiravittaya, S.; Rastelli, A.; Stoffel, M.; Denker, U.; Schmidt, O.G. [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)

    2006-06-09T23:59:59.000Z

    We report on the observation and study of tree-ring structures below dislocated SiGe islands (superdomes) grown on Si(001) substrates. Analogous to the study of tree rings (dendrochronology), these footprints enable us to gain unambiguous information on the growth and evolution of superdomes and their neighboring islands. The temperature dependence of the critical volume for dislocation introduction is measured and related to the composition of the islands. We show clearly that island coalescence is the dominant pathway towards dislocation nucleation at low temperatures, while at higher temperatures anomalous coarsening is effective and leads to the formation of a depletion region around superdomes.

  2. Simple method for calculating island widths

    SciTech Connect (OSTI)

    Cary, J.R.; Hanson, J.D.; Carreras, B.A.; Lynch, V.E.

    1989-01-01T23:59:59.000Z

    A simple method for calculating magnetic island widths has been developed. This method uses only information obtained from integrating along the closed field line at the island center. Thus, this method is computationally less intensive than the usual method of producing surfaces of section of sufficient detail to locate and resolve the island separatrix. This method has been implemented numerically and used to analyze the buss work islands of ATF. In this case the method proves to be accurate to at least within 30%. 7 refs.

  3. Northern Mariana Islands - Territory Energy Profile Overview...

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

    islands of Pagan and Saipan - unique in Micronesia in having abundant geothermal energy potential, and CNMI has excellent resources for both wind and solar power. CNMI enacted a...

  4. Aeromagnetic Survey And Interpretation, Ascention Island, South...

    Open Energy Info (EERE)

    Interpretation, Ascention Island, South Atlantic Ocean Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Aeromagnetic Survey And Interpretation,...

  5. Morphological barrier island changes and recovery of dunes after Hurricane Dennis, St. George Island, Florida

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    of the barrier island are analyzed, along with the short-term post-storm recovery of secondary dunes. ResultsMorphological barrier island changes and recovery of dunes after Hurricane Dennis, St. George September 2009 Keywords: Dune recovery LiDAR Overwash Hurricane Dennis Barrier island During the summer

  6. Sound Wave in Vortex with Sink

    E-Print Network [OSTI]

    Soumen Basak

    2003-11-17T23:59:59.000Z

    Using Komar's definition, we give expressions for the mass and angular momentum of a rotating acoustic black hole. We show that the mass and angular momentum so defined, obey the equilibrium version of the first law of Black Hole thermodynamics. We also show that when a phonon passes by a vortex with a sink, its trajectory is bent. The angle of bending of the sound wave to leading order is quadratic in $A/cb$ and $B/cb$, where $b$ is the impact parameter and $A$ and $B$ are the parameters in the velocity of the fluid flow. The time delay in the propagation of sound wave which to first order depends only on $B/c^2$ and is independent of $A$.

  7. Tidal Downsizing model. II. Planet-metallicity correlations

    E-Print Network [OSTI]

    Nayakshin, Sergei

    2015-01-01T23:59:59.000Z

    Core Accretion (CA), the de-facto accepted theory of planet formation, requires formation of massive solid cores as a prerequisite for assembly of gas giant planets. The observed metallicity correlations of exoplanets are puzzling in the context of CA. While gas giant planets are found preferentially around metal-rich host stars, planets smaller than Neptune orbit hosts with a wide range of metallicities. We propose an alternative interpretation of these observations in the framework of a recently developed planet formation hypothesis called Tidal Downsizing (TD). We perform population synthesis calculations based on TD, and find that the connection between the populations of the gas giant and the smaller solid-core dominated planets is non linear and not even monotonic. While gas giant planets formed in the simulations in the inner few AU region follow a strong positive correlation with the host star metallicity, the smaller planets do not. The simulated population of these smaller planets shows a shallow pe...

  8. Active Flow Control on Bidirectional Rotors for Tidal MHK Applications

    SciTech Connect (OSTI)

    Shiu, Henry [Research Engineer; van Dam, Cornelis P. [Professor

    2013-08-22T23:59:59.000Z

    A marine and hydrokinetic (MHK) tidal turbine extracts energy from tidal currents, providing clean, sustainable electricity generation. In general, all MHK conversion technologies are confronted with significant operational hurdles, resulting in both increased capital and operations and maintenance (O&M) costs. To counter these high costs while maintaining reliability, MHK turbine designs can be simplified. Prior study found that a tidal turbine could be cost-effectively simplified by removing blade pitch and rotor/nacelle yaw. Its rotor would run in one direction during ebb and then reverse direction when the current switched to flood. We dubbed such a turbine a bidirectional rotor tidal turbine (BRTT). The bidirectional hydrofoils of a BRTT are less efficient than conventional hydrofoils and capture less energy, but the elimination of the pitch and yaw systems were estimated to reduce levelized cost of energy by 7.8%-9.6%. In this study, we investigated two mechanisms for recapturing some of the performance shortfall of the BRTT. First, we developed a novel set of hydrofoils, designated the yy series, for BRTT application. Second, we investigated the use of active flow control via microtabs. Microtabs are small deployable/retractable tabs, typically located near the leading or trailing edge of an air/hydrofoil with height on the order of the boundary layer thickness (1% - 2% of chord). They deploy approximately perpendicularly to the foil surface and, like gurney flaps and plain flaps, globally affect the aerodynamics of the airfoil. By strategically placing microtabs and selectively deploying them based on the direction of the inflow, performance of a BRTT rotor can be improved while retaining bidirectional operation. The yy foils were computationally designed and analyzed. They exhibited better performance than the baseline bidirectional foil, the ellipse. For example, the yyb07cn-180 had 14.7% higher (l/d)max than an ellipse of equal thickness. The yyb07cn family also had higher c{sub p,min} than equivalently thick ellipses, indicating less susceptibility to cavitation. Microtabs applied on yy foils demonstrated improved energy capture. A series of variable speed and constant speed rotors were developed with the yyb07cn family of hydrofoils. The constant speed yyb07cn rotor (yy-B02-Rcs,opt) captured 0.45% more energy than the equivalent rotor with ellipses (e-B02-Rcs,opt). With microtabs deployed (yy?t-B02-Rcs,opt), the energy capture increase over the rotor with ellipses was 1.05%. Note, however, that microtabs must be applied judiciously to bidirectional foils. On the 18% thick ellipse, performance decreased with the addition of microtabs. Details of hydrofoil performance, microtab sizing and positioning, rotor configurations, and revenue impacts are presented herein.

  9. SPH simulations of tidally unstable accretion disks in cataclysmic variables

    E-Print Network [OSTI]

    James R. Murray

    1995-11-08T23:59:59.000Z

    We numerically study the precessing disk model for superhump in the SU~UMa subclass of cataclysmic variables, using a two dimensional SPH code specifically designed for thin disk problems. Two disk simulations for a binary with mass ratio $q=\\frac{3}{17}$ (similar to OY~Car) are performed, in order to investigate the Lubow (1991 a,b) tidal resonance instability mechanism. In the first calculation, a disk evolves under steady mass transfer from $L_1$. In the second simulation, mass is added in Keplerian orbit to the inner disk. The two disks follow similar evolutionary paths. However the $L_1$ stream-disk interaction is found to slow the disk's radial expansion and to circularise gas orbits. The initial eccentricity growth in our simulations is exponential at a rate slightly less than predicted by Lubow (1991a). We do not observe a clearing of material from the resonance region via the disk's tidal response to the $m=2$ component of the binary potential as was described in Lubow (1992). Instead the $m=2$ response weakens as the disk eccentricty increases. Both disks reach an eccentric equilibrium state, in which they undergo prograde precession. The rate of viscous energy dissipation in the disks has a periodic excess with a period matching the disk's rotation. The source is identified as a large region in the outer disk, and the mechanism by which it is produced is identified. The time taken for the periodic excess to develop is consistent with the first appearance of superhumps in a superoutburst.

  10. Tidal Energy System for On-Shore Power Generation

    SciTech Connect (OSTI)

    Bruce, Allan J

    2012-06-26T23:59:59.000Z

    Addressing the urgent need to develop LCOE competitive renewable energy solutions for US energy security and to replace fossil-fuel generation with the associated benefits to environment impacts including a reduction in CO2 emissions, this Project focused on the advantages of using hydraulic energy transfer (HET) in large-scale Marine Hydrokinetic (MHK) systems for harvesting off-shore tidal energy in US waters. A recent DOE resource assessment, identifies water power resources have a potential to meet 15% of the US electric supply by 2030, with MHK technologies being a major component. The work covered a TRL-4 laboratory proof-in-concept demonstration plus modeling of a 15MW full scale system based on an approach patented by NASA-JPL, in which submerged high-ratio gearboxes and electrical generators in conventional MHK turbine systems are replaced by a submerged hydraulic radial pump coupled to on-shore hydraulic motors driving a generator. The advantages are; first, the mean-time-between-failure (MTBF), or maintenance, can be extended from approximately 1 to 5 years and second, the range of tidal flow speeds which can be efficiently harvested can be extended beyond that of a conventional submerged generator. The approach uses scalable, commercial-off-the-shelf (COTS) components, facilitating scale-up and commercialization. All the objectives of the Project have been successfully met (1) A TRL4 system was designed, constructed and tested. It simulates a tidal energy turbine, with a 2-m diameter blade in up to a 2.9 m/sec flow. The system consists of a drive motor assembly providing appropriate torque and RPM, attached to a radial piston pump. The pump circulates pressurized, environmentally-friendly, HEES hydraulic fluid in a closed loop to an axial piston motor which drives an electrical generator, with a resistive load. The performance of the components, subsystems and system were evaluated during simulated tidal cycles. The pump is contained in a tank for immersion testing. The COTS pump and motor were selected to scale to MW size and were oversized for the TRL-4 demonstration, operating at only 1-6% of rated values. Nevertheless, in for 2-18 kW drive power, in agreement with manufacturer performance data, we measured efficiencies of 85-90% and 75-80% for the pump and motor, respectively. These efficiencies being 95-96% at higher operating powers. (2) Two follow-on paths were identified. In both cases conventional turbine systems can be modified, replacing existing gear box and generator with a hydraulic pump and on-shore components. On a conventional path, a TRL5/6 15kW turbine system can be engineered and tested on a barge at an existing site in Maine. Alternatively, on an accelerated path, a TRL-8 100kW system can be engineered and tested by modifying a team member's existing MHK turbines, with barge and grid-connected test sites in-place. On both paths the work can be expedited and cost effective by reusing TRL-4 components, modifying existing turbines and using established test sites. (3) Sizing, performance modeling and costing of a scaled 15MW system, suitable for operation in Maine's Western Passage, was performed. COTS components are identified and the performance projections are favorable. The estimated LCOE is comparable to wind generation with peak production at high demand times. (4) We determined that a similar HET approach can be extended to on-shore and off-shore wind turbine systems. These are very large energy resources which can be addressed in parallel for even great National benefit. (5) Preliminary results on this project were presented at two International Conferences on renewable energy in 2012, providing a timely dissemination of information. We have thus demonstrated a proof-in-concept of a novel, tidal HET system that eliminates all submerged gears and electronics to improve reliability. Hydraulic pump efficiencies of 90% have been confirmed in simulated tidal flows between 1 and 3 m/s, and at only 1-6% of rated power. Total system efficiencies have also been modeled, up to MW-scale, for ti

  11. Origin of Tidal Dissipation in Jupiter: II. the Value of Q

    E-Print Network [OSTI]

    Yanqin Wu

    2005-11-28T23:59:59.000Z

    The process of tidal dissipation inside Jupiter is not yet understood. Its tidal quality factor ($Q$) is inferred to lie between $10^5$ and $10^6$. We examine effects of inertial-modes on tidal dissipation in a neutrally bouyant, core-less, uniformly rotating planet. The rate of dissipation caused by resonantly excited inertial-modes depends on the following three parameters: how well they are coupled to the tidal potential, how strongly they are dissipated (by the turbulent viscosity), and how densely distributed they are in frequency. We find that as a function of tidal frequency, the $Q$ value exhibits large fluctuations, with its maximum value set by the group of inertial-modes that have a typical offset from an exact resonance of order their turbulent damping rates. In our model, inertial-modes shed their tidally acquired energy very close to the surface within a narrow latitudinal zone (the 'singularity belt'), and the tidal luminosity escapes freely out of the planet. Strength of coupling between the tidal potential and inertial-modes is sensitive to the presence of density discontinuities inside Jupiter. In the case of a discreet density jump (as may be caused by the transition between metallic and molecular hydrogen), we find a time-averaged $Q \\sim 10^7$. Even though it remains unclear whether tidal dissipation due to resonant inertial-modes is the correct answer to the problem, it is impressive that our simple treatment here already leads to three to five orders of magnitude stronger damping than that from the equilibrium tide. Moreover, our conclusions are not affected by the presence of a small solid core, a different prescription for the turbulent viscosity, or nonlinear mode coupling, but they depend critically on the static stability in the upper atmosphere of Jupiter.

  12. Tidal channel deposits in Upper Cretaceous of northern Kaiparowits Plateau, Utah

    SciTech Connect (OSTI)

    Sanchez, J.D.; McCabe, P.J.

    1988-02-01T23:59:59.000Z

    Seven coarsening-upward sequences have been recognized in the 300 to 400-m thick John Henry Member of the Straight Cliffs Formation. These sequences have abundant hummocky cross-stratification and are interpreted as having formed by the progradation of wave-dominated shorelines. A detailed study of these sequences showed that in many cases channel deposits are incised into upper shoreface deposits. These channels are up t 15 m deep. Mudclasts, Ostrea and Inoceramus fragments, and pebbles are present at the base of many channels. Some channel lag deposits also contain logs with Teredolites borings. Thin units of flaser, wavy and lenticular bedding may be present at any position within the channel deposits but are most common higher in the sequences. The channels are, however, infilled predominantly with trough cross-bedded, fine to medium-grained sandstones. Some cross-beds show multiple reactivation surfaces and the bimodal nature of the paleocurrents suggests that the cross-beds were deposited by tidal currents. The presence of tidal bundles with double mud drapes in a few cross-beds confirms the interpretation of the sandstones as tidal channel deposits. At least 22 tidal bundles are present in one tidal bundle sequence, suggesting a semi-diurnal tidal cycle. Although, there is convincing evidence of tides within the channel deposits, the shoreface deposits show little evidence of reworking by tidal currents. Possible beach or intertidal mudflat deposits have a maximum thickness of 1.5 m. The Kaiparowits region during the Upper Cretaceous probably experienced, therefore, a microtidal regime with significant tidal currents being restricted to tidal inlets or estuaries.

  13. Tidal channel deposits in Upper Cretaceous of northern Kaiparowits Plateau, Utah

    SciTech Connect (OSTI)

    Sanchez, J.D.; McCabe, P.J.

    1988-01-01T23:59:59.000Z

    Seven coarsening-upward sequences have been recognized in the 300 to 400-m thick John Henry Member of the Straight Cliffs Formation. These sequences have abundant hummocky cross-stratification and are interpreted as having formed by the progradation of wave-dominated shorelines. A detailed study of these sequences showed that in many cases channel deposits are incised into upper shoreface deposits. These channels are up to 15 m deep. Mudclasts, Ostrea and Inoceramus fragments, and pebbles are present at the base of many channels. Some channel lag deposits also contain logs with Teredolites borings. Thin units of flaser, wavy and lenticular bedding may be present at any position within the channel deposits but are most common higher in the sequences. The channels are, however, infilled predominantly with trough cross-bedded, fine to medium-grained sandstones. Some crossbeds show multiple reactivation surfaces and the bimodal nature of the paleocurrents suggests that the cross-beds were deposited by tidal currents. The presence of tidal bundles with double mud drapes in a few cross-beds confirms the interpretation of the sandstones as tidal channel deposits. At least 22 tidal bundles are present in one tidal bundle sequence, suggesting a semi-diurnal tidal cycle. Although there is convincing evidence of tides within the channel deposits, the shoreface deposits show little evidence of reworking by tidal currents. Possible beach or intertidal mudflat deposits have a maximum thickness of 1.5 m. The Kaiparowits region during the Upper Cretaceous probably experience, therefore, a microtidal regime with significant tidal currents being restricted to tidal inlets or estuaries.

  14. Modeling the Energy Output from an In-Stream Tidal Turbine Farm

    E-Print Network [OSTI]

    Ye Li; Barbara J. Lence; Sander M. Calisal

    Abstract—This paper is based on a recent paper presented in the 2007 IEEE SMC conference by the same authors [1], discussing an approach to predicting energy output from an instream tidal turbine farm. An in-stream tidal turbine is a device for harnessing energy from tidal currents in channels, and functions in a manner similar to a wind turbine. A group of such turbines distributed in a site is called an in-stream tidal turbine farm which is similar to a wind farm. Approaches to estimating energy output from wind farms cannot be fully transferred to study tidal farms, however, because of the complexities involved in modeling turbines underwater. In this paper, we intend to develop an approach for predicting energy output of an in-stream tidal turbine farm. The mathematical formulation and basic procedure for predicting power output of a stand-alone turbine 1 is presented, which includes several highly nonlinear terms. In order to facilitate the computation and utilize the formulation for predicting power output from a turbine farm, a simplified relationship between turbine distribution and turbine farm energy output is derived. A case study is then conducted by applying the numerical procedure to predict the energy output of the farms. Various scenarios are implemented according to the environmental conditions in Seymour Narrows, British Columbia, Canada. Additionally, energy cost results are presented as an extension. Index Terms—renewable energy, in-stream turbine, tidal current, tidal power, vertical axis turbine, farm system modeling, in-stream tidal turbine farm 1 A stand-alone turbine refers to a turbine around which there is no other turbine that might potentially affect the performance of this turbine.

  15. TIDAL DISSIPATION COMPARED TO SEISMIC DISSIPATION: IN SMALL BODIES, EARTHS, AND SUPER-EARTHS

    SciTech Connect (OSTI)

    Efroimsky, Michael, E-mail: michael.efroimsky@usno.navy.mil [U.S. Naval Observatory, Washington, DC 20392 (United States)

    2012-02-20T23:59:59.000Z

    While the seismic quality factor and phase lag are defined solely by the bulk properties of the mantle, their tidal counterparts are determined by both the bulk properties and the size effect (self-gravitation of a body as a whole). For a qualitative estimate, we model the body with a homogeneous sphere, and express the tidal phase lag through the lag in a sample of material. Although simplistic, our model is sufficient to understand that the lags are not identical. The difference emerges because self-gravitation pulls the tidal bulge down. At low frequencies, this reduces strain and the damping rate, making tidal damping less efficient in larger objects. At higher frequencies, competition between self-gravitation and rheology becomes more complex, though for sufficiently large super-Earths the same rule applies: the larger the planet, the weaker the tidal dissipation in it. Being negligible for small terrestrial planets and moons, the difference between the seismic and tidal lagging (and likewise between the seismic and tidal damping) becomes very considerable for large exoplanets (super-Earths). In those, it is much lower than what one might expect from using a seismic quality factor. The tidal damping rate deviates from the seismic damping rate, especially in the zero-frequency limit, and this difference takes place for bodies of any size. So the equal in magnitude but opposite in sign tidal torques, exerted on one another by the primary and the secondary, have their orbital averages going smoothly through zero as the secondary crosses the synchronous orbit. We describe the mantle rheology with the Andrade model, allowing it to lean toward the Maxwell model at the lowest frequencies. To implement this additional flexibility, we reformulate the Andrade model by endowing it with a free parameter {zeta} which is the ratio of the anelastic timescale to the viscoelastic Maxwell time of the mantle. Some uncertainty in this parameter's frequency dependence does not influence our principal conclusions.

  16. HEALTH EFFECTS OF THE NUCLEAR ACCIDENT AT THREE MILE ISLAND

    E-Print Network [OSTI]

    Fabrikant, J.I.

    2010-01-01T23:59:59.000Z

    Commission on the Accident at Three Mile Island (Fabrikant,Commission on the Accident at Three Mile Island. (Fahrikant,Commission on the Accident at Three Mile Island. (Fabrikant,

  17. The dynamics of genetic and morphological variation on volcanic islands

    E-Print Network [OSTI]

    Thorpe, Roger Stephen

    : volcanism; phylogeography; geographical variation; natural selection; Canary islands; Tarentola 1 and Canary islands). It has been argued that population extinctions, recolonizations and associ- ated a role in shaping geographical variation. The islands of the Canary Archipelago provide an excellent

  18. Rhode Island to Build First Offshore Wind Farm

    Broader source: Energy.gov [DOE]

    Block Island, a small town with only 1,000 full-time, residents, is the site for a big project, when it will become home to Rhode Island’s first offshore wind farm.

  19. Monhegan Island | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose BendMiasole IncMinuteman WindMoana(Tempel,MoeMonhegan Island Jump

  20. Island Gas | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup | OpenHunanInformation sourceInvensysIsland Gas Jump to: navigation,

  1. Multiscale heterogeneity characterization of tidal channel, tidal delta and foreshore facies, Almond Formation outcrops, Rock Springs uplift, Wyoming

    SciTech Connect (OSTI)

    Schatzinger, R.A.; Tomutsa, L. [BDM Petroleum Technologies, Bartlesville, OK (United States)

    1997-08-01T23:59:59.000Z

    In order to accurately predict fluid flow within a reservoir, variability in the rock properties at all scales relevant to the specific depositional environment needs to be taken into account. The present work describes rock variability at scales from hundreds of meters (facies level) to millimeters (laminae) based on outcrop studies of the Almond Formation. Tidal channel, tidal delta and foreshore facies were sampled on the eastern flank of the Rock Springs uplift, southeast of Rock Springs, Wyoming. The Almond Fm. was deposited as part of a mesotidal Upper Cretaceous transgressive systems tract within the greater Green River Basin. Bedding style, lithology, lateral extent of beds of bedsets, bed thickness, amount and distribution of depositional clay matrix, bioturbation and grain sorting provide controls on sandstone properties that may vary more than an order of magnitude within and between depositional facies in outcrops of the Almond Formation. These features can be mapped on the scale of an outcrop. The products of diagenesis such as the relative timing of carbonate cement, scale of cemented zones, continuity of cemented zones, selectively leached framework grains, lateral variability of compaction of sedimentary rock fragments, and the resultant pore structure play an equally important, although less predictable role in determining rock property heterogeneity. A knowledge of the spatial distribution of the products of diagenesis such as calcite cement or compaction is critical to modeling variation even within a single facies in the Almond Fin. because diagenesis can enhance or reduce primary (depositional) rock property heterogeneity. Application of outcrop heterogeneity models to the subsurface is greatly hindered by differences in diagenesis between the two settings. The measurements upon which this study is based were performed both on drilled outcrop plugs and on blocks.

  2. news: Bern Convention group of experts on European island biological diversity: an international network to preserve island biodiversity

    E-Print Network [OSTI]

    Borges, Paulo A. V.

    2009-01-01T23:59:59.000Z

    by the Government of Canary Islands at Tenerife (1-3 Octoberthe Gov- ernments of Canary Islands, Azores and Madeira inAzores, Madeira and Canary Islands (Macaronesia), Balearic

  3. The Long Island Solar Farm | Department of Energy

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

    of Energy The Long Island Solar Farm More Documents & Publications The Long Island Solar Farm EA-1663: Final Environmental Assessment EA-1928: Final Environmental Assessment...

  4. The Long Island Solar Farm | Department of Energy

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

    in the East. The Long Island Solar Farm More Documents & Publications The Long Island Solar Farm EA-1663: Final Environmental Assessment EA-1928: Final Environmental Assessment...

  5. asian pacific islanders: Topics by E-print Network

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

    Department of Mangroves of the Pacific Islands:Agriculture Environmental Sciences and Ecology Websites Summary: . The perception of mangroves by people in the Pacific islands...

  6. Commercial-Scale Renewable-Energy Grants (Rhode Island)

    Broader source: Energy.gov [DOE]

    The Rhode Island Economic Development Corporation (RIEDC) provides incentives for renewable-energy projects. Incentive programs are funded by the Rhode Island Renewable Energy Fund (RIREF) and...

  7. Energy Transformation in the U.S. Virgin Islands | Department...

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

    About Us Initiatives & Projects Energy Transition Initiative Energy Transformation in the U.S. Virgin Islands Energy Transformation in the U.S. Virgin Islands Click on the...

  8. amchitka island alaska: Topics by E-print Network

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

    MA August 2005 Prepared for Massachusetts for August 2005 This update summarizes the monthly data results for the Thompson Island monitoring site Island for the month of August...

  9. adak island alaska: Topics by E-print Network

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

    MA August 2005 Prepared for Massachusetts for August 2005 This update summarizes the monthly data results for the Thompson Island monitoring site Island for the month of August...

  10. akutan island alaska: Topics by E-print Network

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

    MA August 2005 Prepared for Massachusetts for August 2005 This update summarizes the monthly data results for the Thompson Island monitoring site Island for the month of August...

  11. The Biogeography of Globally Threatened Seabirds and Island Conservation Opportunities

    E-Print Network [OSTI]

    Spatz, Dena R.

    2013-01-01T23:59:59.000Z

    and North Islands, Hispaniola, etc. ). The conservation ofand North Islands, Hispaniola, etc. ). The conservation ofGreater Antilles (Hispaniola) Lesser Antilles Galapagos

  12. Observation of energetic electrons within magnetic islands

    E-Print Network [OSTI]

    Loss, Daniel

    that energetic electron fluxes peak at sites of compressed density within islands, which imposes a new constraintLETTERS Observation of energetic electrons within magnetic islands L.-J. CHEN1 *, A. BHATTACHARJEE1, University of New Hampshire, Durham, New Hampshire 03824, USA 2 National Astronomical Observatory of Japan, 2

  13. Restoration potential of diked estuarine wetlands in Washington and Oregon. Phase 2: Identification of candidate sites in puget sound

    SciTech Connect (OSTI)

    Not Available

    1990-07-01T23:59:59.000Z

    Under the auspices of the Clean Water Act, Section 404, one of the missions of the U.S. Environmental Protection Agency (EPA) is to enhance and protect wetland resources. In EPA Region 10, specifically in the Puget Sound area, there is opportunity to enhance aquatic resources by restoring some of the thousands of acres of wetlands that have been historically diked. The objectives of Work Assignment 24 is to field identify and prioritize areas in Puget Sound and the Straits of Juan de Fuca that were tidally influenced wetlands which are now either not functioning as wetlands or are providing limited wetland functions due to dike construction. This report is the field confirmation of the non-field data compiled in Phase I. The objective of the Phase I study was to identify areas in Washington and Oregon that: (1) once were estuarine wetlands but are not currently functioning as such due to dike construction; (2) were greater than five acres in size; and (3) may be suitable for restoration.

  14. Division of Water, Parts 660-661: Tidal Wetlands (New York)

    Broader source: Energy.gov [DOE]

    These regulations require permits for any activity which directly or indirectly may have a significant adverse effect on the existing condition of any tidal wetland, including but not limited to...

  15. Tidal and Wind Mixing versus Thermal Stratification in the South Atlantic Bight.

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    overcome the tendency for tidal power to produce a well-mixed system". Additionally, they expressed some are explored using a potential energy formulation for the South Atlantic Bight (SAB). The efficiency of wind

  16. Analytical Model of Tidal Distortion and Dissipation for a Giant Planet with a Viscoelastic Core

    E-Print Network [OSTI]

    Storch, Natalia I

    2015-01-01T23:59:59.000Z

    We present analytical expressions for the tidal Love numbers of a giant planet with a solid core and a fluid envelope. We model the core as a uniform, incompressible, elastic solid, and the envelope as a non-viscous fluid satisfying the $n=1$ polytropic equation of state. We discuss how the Love numbers depend on the size, density, and shear modulus of the core. We then model the core as a viscoelastic Maxwell solid and compute the tidal dissipation rate in the planet as characterized by the imaginary part of the Love number $k_2$. Our results improve upon existing calculations based on planetary models with a solid core and a uniform ($n=0$) envelope. Our analytical expressions for the Love numbers can be applied to study tidal distortion and viscoelastic dissipation of giant planets with solid cores of various rheological properties, and our general method can be extended to study tidal distortion/dissipation of super-earths.

  17. The Distribution of Submersed Aquatic Vegetation in the Fresh and Oligohaline Tidal Potomac River, 2004

    E-Print Network [OSTI]

    Washington, DC to Broad Creek, MD, 2004...............................................................................6 2. Percent cover of hydrilla in SAV beds located in the tidal Potomac River from Broad Creek, MD to Chicamuxen Creek, MD, 2004.......................................................................7 3. Percent

  18. Sudden increase in tidal response linked to calving and acceleration at a large Greenland outlet glacier

    E-Print Network [OSTI]

    de Juan, J.; Elosegui, P.; Nettles, M.; Larsen, T.B.; Davis, J.L.; Hamilton, Gordon S.; Stearns, Leigh; Anderson, M.L.; Ekstrom, G.; Ahlstrom, A.P.; Stenseng, L.; Khan, S.A.; Forsberg, R.

    2010-06-23T23:59:59.000Z

    [1] Large calving events at Greenland's largest outlet glaciers are associated with glacial earthquakes and near-instantaneous increases in glacier flow speed. At some glaciers and ice streams, flow is also modulated in a regular way by ocean tidal...

  19. A numerical study of horizontal dispersion in a macro tidal basin

    E-Print Network [OSTI]

    Maine, University of

    boundary layer near the tidal mixing front on Georges Bank (Houghton and Ho 2001) and in Hudson River that significant horizon- tal dispersion and mixing can be induced in oscillatory flows (Aref 1984; Ottino 1989

  20. Maine Project Takes Historic Step Forward in U.S. Tidal Energy...

    Energy Savers [EERE]

    contracts will be in place for 20 years -- making them the first long-term tidal energy power purchase agreements in the United States. The implications of these agreements are...

  1. Integration of Wave and Tidal Power into the Haida Gwaii Electrical Grid

    E-Print Network [OSTI]

    Victoria, University of

    , Canada that relies heavily on diesel fuel for energy generation. An investigation is done into the potential for electricity generation using both tidal stream and wave energy in Haida Gwaii. A mixed integer

  2. MHK Projects/Penobscot Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformationCygnet <|Galway Bay IEVerona Island, ME Project

  3. Underestimation of the UK Tidal David J.C. MacKay

    E-Print Network [OSTI]

    MacKay, David J.C.

    there and would deliver up to 40 GW (peak). In this note, I present back­of­envelope models of tidal power physical model of the flow of energy in a tidal wave. In a shallow­water­wave model of tide, the true flow­page comment on the DTI Energy Review, Salter [2005] suggests that this standard figure may well be an under

  4. Under-estimation of the UK Tidal David J.C. MacKay

    E-Print Network [OSTI]

    MacKay, David J.C.

    there and would deliver up to 40 GW (peak). In this note, I present back-of-envelope models of tidal power of the flow of energy in a tidal wave. In a shallow-water-wave model of tide, the true flow of en- ergy on the DTI Energy Review, Salter [2005] suggests that this standard figure may well be an under-estimate (see

  5. Hydraulic properties of an artificial tidal inlet through a Texas barrier beach

    E-Print Network [OSTI]

    Prather, Stanley Harold

    1972-01-01T23:59:59.000Z

    HYDRAULIC PROPERTIES OF AN ARTIFICIAL TIDAL INLET THROUGH A TEXAS BARRIER BEACH A Thesis by STANLEY HAROLD PRATHER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE August 1972 Major Sub]ect: Civil Engineering HYDRAULIC PROPERTIES OF AN ARTIFICIAL TIDAL INLET THROUGH A TEXAS BARRIER BEACH A Thesis by STANLEY HAROLD PRATHER Approved as to style and content by: (Chairman of Committee) (( (Head...

  6. Testing Cosmology with Cosmic Sound Waves

    E-Print Network [OSTI]

    Pier Stefano Corasaniti; Alessandro Melchiorri

    2008-03-25T23:59:59.000Z

    WMAP observations have accurately determined the position of the first two peaks and dips in the CMB temperature power spectrum. These encode information on the ratio of the distance to the last scattering surface to the sound horizon at decoupling. However pre-recombination processes can contaminate this distance information. In order to assess the amplitude of these effects we use the WMAP data and evaluate the relative differences of the CMB peaks and dips multipoles. We find that the position of the first peak is largely displaced with the respect to the expected position of the sound horizon scale at decoupling. In contrast the relative spacings of the higher extrema are statistically consistent with those expected from perfect harmonic oscillations. This provides evidence for a scale dependent phase shift of the CMB oscillations which is caused by gravitational driving forces affecting the propagation of sound waves before recombination. By accounting for these effects we have performed a MCMC likelihood analysis to constrain in combination with recent BAO data a constant dark energy equation w. For a flat universe we find at 95% upper limit w<-1.10, and including the HST prior w<-1.14, which are only marginally consistent with limits derived from the supernova SNLS sample. Larger limits are obtained for non-flat cosmologies. From the full CMB likelihood analysis we also estimate the values of the shift parameter R and the multipole l_a of the acoustic horizon at decoupling for several cosmologies to test their dependence on model assumptions. Although the analysis of the full CMB spectra should be always preferred, using the position of the CMB peaks and dips provide a simple and consistent method for combining CMB constraints with other datasets.

  7. Testing cosmology with cosmic sound waves

    SciTech Connect (OSTI)

    Corasaniti, Pier Stefano [LUTH, Observatoire de Paris, CNRS UMR 8102, Universite Paris Diderot, 5 Place Jules Janssen, 92195 Meudon Cedex (France); Melchiorri, Alessandro [Dipartimento di Fisica e Sezione INFN, Universita degli Studi di Roma 'La Sapienza', Ple Aldo Moro 5, 00185, Rome (Italy); CERN, Theory Division, CH-1211 Geneva 23 (Switzerland)

    2008-05-15T23:59:59.000Z

    Wilkinson Microwave Anisotropy Probe (WMAP) observations have accurately determined the position of the first two peaks and dips in the cosmic microwave background (CMB) temperature power spectrum. These encode information on the ratio of the distance to the last scattering surface to the sound horizon at decoupling. However prerecombination processes can contaminate this distance information. In order to assess the amplitude of these effects, we use the WMAP data and evaluate the relative differences of the CMB peak and dip multipoles. We find that the position of the first peak is largely displaced with respect to the expected position of the sound horizon scale at decoupling. In contrast, the relative spacings of the higher extrema are statistically consistent with those expected from perfect harmonic oscillations. This provides evidence for a scale dependent phase shift of the CMB oscillations which is caused by gravitational driving forces affecting the propagation of sound waves before recombination. By accounting for these effects we have performed a Markov Chain Monte Carlo likelihood analysis of the location of WMAP extrema to constrain, in combination with recent BAO data, a constant dark energy equation of state parameter w. For a flat universe we find a strong 2{sigma} upper limit w<-1.10, and including the Hubble Space Telescope prior, we obtain w<-1.14, which is only marginally consistent with limits derived from the Supernova Legacy Survey sample. On the other hand, we infer larger limits for nonflat cosmologies. From the full CMB likelihood analysis, we also estimate the values of the shift parameter R and the multipole l{sub a} of the acoustic horizon at decoupling for several cosmologies, to test their dependence on model assumptions. Although the analysis of the full CMB spectra should always be preferred, using the position of the CMB peaks and dips provides a simple and consistent method for combining CMB constraints with other data sets.

  8. Sound Coiled-Tubing Drilling Practices

    SciTech Connect (OSTI)

    Williams, Thomas; Deskins, Greg (Maurer Technology Inc.); Ward, Stephen L. (Advantage Energy Services Ltd); Hightower, Mel

    2001-09-30T23:59:59.000Z

    This Coiled-Tubing Drilling (CTD) Sound Practices Manual provides tools needed by CTD engineers and supervisors to plan, design and perform safe, successful CTD operations. As emphasized throughout, both careful planning and attention to detail are mandatory for success. A bibliography of many useful CTD references is presented in Chapter 6. This manual is organized according to three processes: 1) Pre-Job Planning Process, 2) Operations Execution Process, and 3) Post-Job Review Process. Each is discussed in a logical and sequential format.

  9. Gravitational self-force corrections to two-body tidal interactions and the effective one-body formalism

    E-Print Network [OSTI]

    Donato Bini; Thibault Damour

    2014-09-24T23:59:59.000Z

    Tidal interactions have a significant influence on the late dynamics of compact binary systems, which constitute the prime targets of the upcoming network of gravitational-wave detectors. We refine the theoretical description of tidal interactions (hitherto known only to the second post-Newtonian level) by extending our recently developed analytic self-force formalism, for extreme mass-ratio binary systems, to the computation of several tidal invariants. Specifically, we compute, to linear order in the mass ratio and to the 7.5$^{\\rm th}$ post-Newtonian order, the following tidal invariants: the square and the cube of the gravitoelectric quadrupolar tidal tensor, the square of the gravitomagnetic quadrupolar tidal tensor, and the square of the gravitoelectric octupolar tidal tensor. Our high-accuracy analytic results are compared to recent numerical self-force tidal data by Dolan et al. \\cite{Dolan:2014pja}, and, notably, provide an analytic understanding of the light ring asymptotic behavior found by them. We transcribe our kinematical tidal-invariant results in the more dynamically significant effective one-body description of the tidal interaction energy. By combining, in a synergetic manner, analytical and numerical results, we provide simple, accurate analytic representations of the global, strong-field behavior of the gravitoelectric quadrupolar tidal factor. A striking finding is that the linear-in-mass-ratio piece in the latter tidal factor changes sign in the strong-field domain, to become negative (while its previously known second post-Newtonian approximant was always positive). We, however, argue that this will be more than compensated by a probable fast growth, in the strong-field domain, of the nonlinear-in-mass-ratio contributions in the tidal factor.

  10. A Modeling Study of the Potential Water Quality Impacts from In-Stream Tidal Energy Extraction

    SciTech Connect (OSTI)

    Wang, Taiping; Yang, Zhaoqing; Copping, Andrea E.

    2013-11-09T23:59:59.000Z

    To assess the effects of tidal energy extraction on water quality in a simplified estuarine system, which consists of a tidal bay connected to the coastal ocean through a narrow channel where energy is extracted using in-stream tidal turbines, a three-dimensional coastal ocean model with built-in tidal turbine and water quality modules was applied. The effects of tidal energy extraction on water quality were examined for two energy extraction scenarios as compared with the baseline condition. It was found, in general, that the environmental impacts associated with energy extraction depend highly on the amount of power extracted from the system. Model results indicate that, as a result of energy extraction from the channel, the competition between decreased flushing rates in the bay and increased vertical mixing in the channel directly affects water quality responses in the bay. The decreased flushing rates tend to cause a stronger but negative impact on water quality. On the other hand, the increase of vertical mixing could lead to higher bottom dissolved oxygen at times. As the first modeling effort directly aimed at examining the impacts of tidal energy extraction on estuarine water quality, this study demonstrates that numerical models can serve as a very useful tool for this purpose. However, more careful efforts are warranted to address system-specific environmental issues in real-world, complex estuarine systems.

  11. Gravity waves generated by sounds from Big Bang phase transitions

    E-Print Network [OSTI]

    Tigran Kalaydzhyan; Edward Shuryak

    2015-01-14T23:59:59.000Z

    Inhomogeneities associated with the cosmological QCD and electroweak phase transitions produce hydrodynamical perturbations, longitudinal sounds and rotations. It has been demonstrated by Hindmarsh et al. that the sounds produce gravity waves (GW) well after the phase transition is over. We further argue, that, under certain conditions, an inverse acoustic cascade may occur and move sound perturbations from the (UV) momentum scale at which the sound is originally produced to much smaller (IR) momenta. Weak turbulence regime of this cascade is studied via Boltzmann equation, possessing stationary power and time-dependent self-similar solutions. We suggest certain indices for strong turbulence regime as well, into which the cascade eventually proceeds. Finally, we point out that two on shell sound waves can produce one on-shell gravity wave, and evaluate the rate of the process using standard sound loop diagram.

  12. "Circularization" vs. Accretion -- What Powers Tidal Disruption Events?

    E-Print Network [OSTI]

    Piran, Tsvi; Krolik, Julian; Cheng, Roseanne M; Shiokawa, Hotaka

    2015-01-01T23:59:59.000Z

    A tidal disruption event (TDE) takes place when a star passes near enough to a massive black hole to be disrupted. About half the star's matter is given elliptical trajectories with large apocenter distances, the other half is unbound. To "circularize", i.e., to form an accretion flow, the bound matter must lose a significant amount of energy, with the actual amount depending on the characteristic scale of the flow measured in units of the black hole's gravitational radius (~ 10^{51} (R/1000R_g)^{-1} erg). Recent numerical simulations (Shiokawa et al., 2015) have revealed that the circularization scale is close to the scale of the most-bound initial orbits, ~ 10^3 M_{BH,6.5}^{-2/3} R_g ~ 10^{15} M_{BH,6.5}^{1/3} cm from the black hole, and the corresponding circularization energy dissipation rate is $\\sim 10^{44} M_{BH,6.5}^{-1/6}$~erg/s. We suggest that the energy liberated during circularization, rather then energy liberated by accretion onto the black hole, powers the observed optical TDE candidates (e.g.A...

  13. On tidal capture of primordial black holes by neutron stars

    E-Print Network [OSTI]

    Guillaume Defillon; Etienne Granet; Petr Tinyakov; Michel H. G. Tytgat

    2014-09-01T23:59:59.000Z

    The fraction of primordial black holes (PBHs) of masses $10^{17} - 10^{26}$ g in the total amount of dark matter may be constrained by considering their capture by neutron stars (NSs), which leads to the rapid destruction of the latter. The constraints depend crucially on the capture rate which, in turn, is determined by the energy loss by a PBH passing through a NS. Two alternative approaches to estimate the energy loss have been used in the literature: the one based on the dynamical friction mechanism, and another on tidal deformations of the NS by the PBH. The second mechanism was claimed to be more efficient by several orders of magnitude due to the excitation of particular oscillation modes reminiscent of the surface waves. We address this disagreement by considering a simple analytically solvable model that consists of a flat incompressible fluid in an external gravitational field. In this model, we calculate the energy loss by a PBH traversing the fluid surface. We find that the excitation of modes with the propagation velocity smaller than that of PBH is suppressed, which implies that in a realistic situation of a supersonic PBH the large contributions from the surface waves are absent and the above two approaches lead to consistent expressions for the energy loss.

  14. Tidal Streams and Low Mass Companions of M31

    E-Print Network [OSTI]

    Robert Braun; David Thilker

    2003-12-04T23:59:59.000Z

    We have imaged the extended HI environment of M31 with an unprecedented combination of high resolution and sensitivity. We detect a number of distinct High Velocity Cloud components associated with M31. A sub-set of the features within 30 kpc appear to be tidal in origin. A filamentary ``halo'' component is concentrated at the M31 systemic velocity and appears to extend into a ``bridge'' connecting M31 and M33. This may represent condensation in coronal gas. A population of discrete clouds is detected out to radii of about 150 kpc. Discrete cloud line-widths are correlated with HI mass and are consistent with a 100:1 ratio of dark to HI mass. These may be the gaseous counterparts of low-mass dark-matter satellites. The combined distribution of M31's HVC components can be characterized by a spatial Gaussian of 55 kpc dispersion and yields an N_HI distribution function which agrees well with that of low red-shift QSOs.

  15. Tidal Accelerometry: Exploring the Cosmos Via Gravitational Correlations

    E-Print Network [OSTI]

    Datta, Timir; Wescott, Mike; Jeong, Yeuncheol; Morawiec, Pawel; Gambrell, James; Overcash, Dan; Zhang, Huaizhou; Voulgaris, George

    2010-01-01T23:59:59.000Z

    Newtonian gravitation is non-radiative but is extremely pervasive and penetrates equally into every media because it cannot be shielded. The extra terrestrial fgravity is responsible for earth's trajectory. However its correlation or geodesic deviation is manifested as semi-diurnal and diurnal tides. Tidal signals, A(t) are temporal modulations in the field differential which can be observed in a wide variety of natural and laboratory situations. A(t) is a quasi-static, low frequency signal which arises from the relative changes in positions of the detector and source and is not part of the electromagnetic spectrum. Isaac Newton was the first to recognize the importance of tides in astrometry and attempetd to estimate lunar mass from ocean tides. By a case study we show, how the systematics of the gravitational correlation can be used for calibration and de-trending which can significantly increase the confidence level of high precision experiments. A(t) can also be used to determine the distribution of celes...

  16. The Speed of Sound in Hadronic Matter

    E-Print Network [OSTI]

    Castorina, P; Miller, D E; Satz, H

    2009-01-01T23:59:59.000Z

    We calculate the speed of sound $c_s$ in an ideal gas of resonances whose mass spectrum is assumed to have the Hagedorn form $\\rho(m) \\sim m^{-a}\\exp{bm}$, which leads to singular behavior at the critical temperature $T_c = 1/b$. With $a = 4$ the pressure and the energy density remain finite at $T_c$, while the specific heat diverges there. As a function of the temperature the corresponding speed of sound initially increases similarly to that of an ideal pion gas until near $T_c$ where the resonance effects dominate causing $c_s$ to vanish as $(T_c - T)^{1/4}$. In order to compare this result to the physical resonance gas models, we introduce an upper cut-off M in the resonance mass integration. Although the truncated form still decreases somewhat in the region around $T_c$, the actual critical behavior in these models is no longer present.

  17. Electromagnetic Soundings At Dixie Valley Geothermal Area (Mallan...

    Open Energy Info (EERE)

    Mallan, Et Al., 2001) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Electromagnetic Soundings At Dixie Valley Geothermal Area (Mallan, Et Al.,...

  18. UBC 50th Anniversary Sound Collection / UBC Archives (collector)

    E-Print Network [OSTI]

    Handy, Todd C.

    UBC 50th Anniversary Sound Collection / UBC Archives (collector) Compiled by Erwin Wodarczak (2006 Archives (collector). ­ September- October 1965. 20 audio recordings. Administrative Sketch The University

  19. atmospheric sound: Topics by E-print Network

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

    and Applications of Atmospheric Soundings from Geostationary Environmental Sciences and Ecology Websites Summary: products can help nowcasting, an improved clear-sky physical...

  20. Puget Sound Energy- Portable Classroom Energy Efficient Controls Rebate Program

    Broader source: Energy.gov [DOE]

    Puget Sound Energy's (PSE) Portable Classroom Controls Rebate program offers rebates to school customers who upgrade portable classroom controls from seven-day programmable thermostats to 365-day...

  1. Electromagnetic Soundings At Kilauea East Rift Geothermal Area...

    Open Energy Info (EERE)

    of this study was to obtain a more complete model of the geologic structure and hydrology of Kilauea's east rift zone Notes Electromagnetic transient soundings were conducted...

  2. Puget Sound Energy- Residential Energy Efficiency Rebate Programs

    Broader source: Energy.gov [DOE]

    Puget Sound Energy's (PSE) Residential Energy Efficiency Rebate Programs offer a variety of incentives for customers who purchase energy efficient appliances and equipment. Rebates include furnaces...

  3. Puget Sound Energy- Multi-Family Efficiency Programs

    Broader source: Energy.gov [DOE]

    Puget Sound Energy (PSE) offers two different programs for multifamily energy efficiency rebates: the Multifamily Retrofit Program and the Multifamily New Construction Program. In order to...

  4. accurate sound localization: Topics by E-print Network

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

    Profile Layers Engineering Websites Summary: Accurate Ranging in a Stratified Underwater Medium with Multiple Iso-gradient Sound Speed Profile between sensor nodes in an...

  5. Puget Sound Energy- Commercial Energy Efficient Equipment Rebate Programs

    Broader source: Energy.gov [DOE]

    Puget Sound Energy's (PSE) Energy Efficient Equipment Rebate Programs offer a variety of incentives to non-residential customers. Eligible technologies include lighting measures, air conditioners,...

  6. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA June 2005 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA at Thompson Island for the month of June 2005, at the highest anemometer height of 40 m. Thompson Island Wind

  7. U.S. Virgin Islands- Net Metering

    Broader source: Energy.gov [DOE]

    In February 2007, the U.S. Virgin Islands Public Services Commission approved a limited net-metering program for residential and commercial photovoltaic (PV), wind-energy or other renewable energ...

  8. Qualifying RPS State Export Markets (Rhode Island)

    Broader source: Energy.gov [DOE]

    This entry lists the states with Renewable Portfolio Standard (RPS) policies that accept generation located in Rhode Island as eligible sources towards their RPS targets or goals. For specific...

  9. 11 Life on Herbert Island (part 2)

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 11 Length of track 45 minutes Title of track Life on Herbert Island (part 2) Translation...

  10. 13 Life on Herbert Island (part 3)

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 13 Length of track 30 minutes Title of track Life on Herbert Island (part 3) Translation...

  11. 12 Life on Herbert Island (part 1)

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 12 Length of track 1 hour 35 minutes Title of track Life on Herbert Island (part 1...

  12. Community Redevelopment Case Study: Jekyll Island

    Broader source: Energy.gov [DOE]

    Presentation—given at the April 2012 Federal Utility Partnership Working Group (FUPWG) meeting—features photos from a case study about Jekyll Island's community redevelopment project in Georgia.

  13. Alternative Fuels Data Center: Rhode Island Information

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

    facilities in Rhode Island, use the TransAtlas interactive mapping tool or use BioFuels Atlas to show the use and potential production of biofuels throughout the U.S. and...

  14. Solar School Program in Reunion Island

    E-Print Network [OSTI]

    David, M.; Adelard, L.

    2004-01-01T23:59:59.000Z

    system efficiency. In Réunion Island, the industrial engineering laboratory is involved in the regional solar school program. Its aim is to gather some local construction actors (city technical offices, architects, civil engineers, specialized university...

  15. The Jobs Development Act (Rhode Island)

    Broader source: Energy.gov [DOE]

    The Jobs Development Act provides an incremental reduction in the corporate income tax rate (9%) to companies creating jobs in Rhode Island. For every ten new jobs created for companies with fewer...

  16. Job Creation Guaranty Program (Rhode Island)

    Broader source: Energy.gov [DOE]

    RIEDC’s Job Creation Guaranty Program provides businesses looking to expand or relocate in Rhode Island with access to capital and credit. RIEDC guarantees loans by private lenders or guarantees...

  17. CAYMAN ISLANDS National Biodiversity Action Plan

    E-Print Network [OSTI]

    Exeter, University of

    down to us by those who went before, the natural wealth and beauty which is ours. John F. Kennedy environment for the Cayman Islands. CH2M Hill "Study on the Provision of Construction Aggregate and Fill

  18. Bainbridge Island Data Dashboard | Department of Energy

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

    The data dashboard for Bainbridge Island, a partner in the U.S. Department of Energy's Better Buildings Neighborhood Program. bban0003805pmcdashboardy13-q3.xls More Documents...

  19. Macroalgal distribution at Lee Stocking Island, Bahamas

    E-Print Network [OSTI]

    Roberts, Jill Christie

    1997-01-01T23:59:59.000Z

    from the reef community, macroalgae have been increasing in abundance on the reefs surrounding Lee Stocking Island (LSI), Bahamas. Macroalgal patches prevent coral recruitment and growth, thereby restructuring the reef. In such cases, coral and algal...

  20. DYER ISLAND CONSERVATION TRUST LETTER OF CONCERN

    E-Print Network [OSTI]

    de Villiers, Marienne

    ..........................................................................................................................8 4 GENERAL POTENTIAL IMPACTS OF THE NPS ON THE MARINE ENVIRONMENTDYER ISLAND CONSERVATION TRUST LETTER OF CONCERN ASSOCIATED WITH THE ESTABLISHMENT OF A NUCLEAR....................................................................................................................................6 3 THE MARINE ENVIRONMENT SURROUNDING BANTAMSKLIP

  1. US Virgin Islands renewable energy future

    E-Print Network [OSTI]

    Oldfield, Brian (Brian K.)

    2013-01-01T23:59:59.000Z

    The US Virgin Islands must face drastic changes to its electrical system. There are two problems with electricity production in the USVI-it's dirty and it's expensive. Nearly one hundred percent of the electricity in these ...

  2. Solar School Program in Reunion Island 

    E-Print Network [OSTI]

    David, M.; Adelard, L.

    2004-01-01T23:59:59.000Z

    Because of its particular geographic situation and relatively high altitude (3069 meters), Reunion Island is composed of a very large amount of micro-climates which have a direct impact on buildings' comfort, energy consumptions and renewable energy...

  3. N. Mariana Islands- Renewables Portfolio Standard

    Broader source: Energy.gov [DOE]

    The Commonwealth of the Northern Mariana Islands enacted its Renewables Portfolio Standard in September 2007, in which a certain percentage of its net electricity sales must come from renewable e...

  4. Long Island Power Authority- Renewable Electricity Goal

    Broader source: Energy.gov [DOE]

    As a municipal utility, the Long Island Power Authority (LIPA) is not obligated to comply with the [http://www.dsireusa.org/library/includes/incentive2.cfm?Incentive_Code=N... New York Renewable...

  5. Metromorphosis : evolution on the urban island

    E-Print Network [OSTI]

    Vezina, Kenrick (Kenrick Freitas)

    2011-01-01T23:59:59.000Z

    Cities are very much alive. Like islands, they provide a natural testing ground for evolution. With more than half of the world's population living in urban areas now, the influence cities have on the planet's life is ...

  6. PSEG Long Island- Renewable Electricity Goal

    Broader source: Energy.gov [DOE]

    As a municipal utility, the Long Island Power Authority (LIPA) is not obligated to comply with the New York Renewable Portfolio Standard (RPS). The LIPA Board of Trustees has nevertheless decided...

  7. Online Submission ID: 0594 Sound Propagation in Large Complex Environments Using Wave-Ray Coupling

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    Online Submission ID: 0594 Sound Propagation in Large Complex Environments Using Wave-Ray Coupling-3 cal acoustic techniques for sound propagation that computes how4 sound waves travel in space reducing the overall computation.19 1 Introduction20 Sound propagation techniques determine how sound waves

  8. Online Submission ID: 0301 Wave-Ray Coupling for Interactive Sound Propagation in Large Complex Scenes

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    Online Submission ID: 0301 Wave-Ray Coupling for Interactive Sound Propagation in Large Complex numerical techniques.18 1 Introduction19 Sound propagation techniques are used to model how sound waves20 applications use geometric sound propagation40 techniques, which assume that sound waves travels like rays

  9. The Automation of Sound Reasoning and Successful Proof Finding

    E-Print Network [OSTI]

    Fitelson, Branden

    709 44 The Automation of Sound Reasoning and Successful Proof Finding LARRY WOS AND BRANDEN scientist naturally envisioned the automation of sound rea- soning ­ reasoning in which conclusions, and find proofs. But can such logical reasoning be fully automated? Can a single computer program

  10. Gravity waves generated by sounds from Big Bang phase transitions

    E-Print Network [OSTI]

    Kalaydzhyan, Tigran

    2014-01-01T23:59:59.000Z

    Inhomogeneities associated with the cosmological QCD and electroweak phase transitions produce hydrodynamical perturbations, longitudinal sounds and rotations. It has been demonstrated numerically by Hindmarsh et al. that the sounds produce gravity waves (GW), and that this process does continue well after the phase transition is over. We further introduce a long period of the so-called inverse acoustic cascade, between the UV momentum scale at which the sound is originally produced and the IR scale at which GW is generated. It can be described by the Boltzmann equation, possessing stationary power and self-similar time-dependent solutions. If the sound dispersion law allows one-to-two sound decays, the exponent of the power solution is large and a strong amplification of the sound amplitude (limited only by the total energy) takes place. Alternative scenario dominated by sound scattering leads to smaller indices and much smaller IR sound amplitude. We also point out that two on shell phonons can produce a gr...

  11. Dust-Acoustic Waves: Visible Sound Waves Robert L. Merlino

    E-Print Network [OSTI]

    Merlino, Robert L.

    Dust-Acoustic Waves: Visible Sound Waves Robert L. Merlino Department of Physics and Astronomy with their announcement that: "We find that a new type of sound wave, namely, the dust-acoustic waves, can appear" [1 and experimental work on dust acoustic waves is given. The basic physics of the dust acoustic wave and some

  12. Wave-Based Sound Propagation for VR Applications Ravish Mehra

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    Wave-Based Sound Propagation for VR Applications Ravish Mehra University of North Carolina to state-of-the-art wave solvers, enabling real-time, wave-based sound propagation in scenes spanning propagation accurately, it is important to develop interactive wave-based propagation techniques. We present

  13. TIME-PERIODIC SOUND WAVE PROPAGATION COMPRESSIBLE EULER EQUATIONS

    E-Print Network [OSTI]

    A PARADIGM FOR TIME-PERIODIC SOUND WAVE PROPAGATION IN THE COMPRESSIBLE EULER EQUATIONS BLAKE consistent with time-periodic sound wave propagation in the 3 Ã? 3 nonlinear compressible Euler equations description of shock-free waves that propagate through an oscillating entropy field without breaking or dis

  14. South Puget Sound Community College Portland State University Transfer Worksheet

    E-Print Network [OSTI]

    Caughman, John

    South Puget Sound Community College Portland State University Transfer Worksheet Transferring to Portland State University (PSU) with a Direct Transfer Agreement (DTA) Associates degree from South Puget) #12;South Puget Sound Community College Portland State University 2. DEGREE REQUIREMENTS The majority

  15. SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE

    E-Print Network [OSTI]

    Firestone, Jeremy

    SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE UD - LEWES, DELAWARE January 2011 ` #12;SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE AT THE UNIVERSITY OF DELAWARE LEWES, DELAWARE A Gamesa G90 2.0-MW wind turbine operates at the University of Delaware (UD), Lewes campus on a parcel

  16. Description Sound Devices USBPre is a complete, portable hardware

    E-Print Network [OSTI]

    Description Sound Devices USBPre is a complete, portable hardware interface for PC and Mac audio electronics, and S/PDIF digital sources with personal computers. Its high-performance, 24-bit 9.x and Windows. SOUND DEVICES #12;Specifications Frequency Response: (reference 1 kHz) 10 Hz - 20 k

  17. Impacts of Center-Based Telecommuting on Travel and Emissions: Analysis of the Puget Sound Demonstration Project

    E-Print Network [OSTI]

    Henderson, Dennis K.; Mokhtarian, Patricia L.

    1996-01-01T23:59:59.000Z

    of telecommuting D. , for the Puget Sound Demonstrationof transportation strategies: The Puget Sound TelecommutingLagerberg B. (1992) Puget sound telecommutingdemonstration:

  18. Using Travel Diary Data to Estimate the Emissions Impacts of Transportation Strategies: The Puget Sound Telecommuting Demonstration Project

    E-Print Network [OSTI]

    Henderson, Dennis K.; Koenig, Brett E.; Mokhtarian, Patricia L.

    1996-01-01T23:59:59.000Z

    1996. Davis), M. ; B. ~Puget telecommuting Sound demons~’a-of Transportation Strategies: The Puget Sound Telecomrnutingof Transportation Strategies: The Puget Sound Telecommuting

  19. Impacts of Center-Based Telecommuting on Travel and Emissions: Analysis of the Puget Sound Demonstration Project

    E-Print Network [OSTI]

    Henderson, Dennis; Mohktarian, Patricia

    1996-01-01T23:59:59.000Z

    Lagerberg B. (1992) Puget sound telecommuting demonstration:EMISSIONS: ANALYSIS OF THE PUGET SOUND DEMONSTRATION PROJECTthe travel diaries of the Puget Sound Project participants.

  20. Spatial Sound Rendering Using Measured Room Impulse Responses Yan Li, Peter F. Driessen

    E-Print Network [OSTI]

    Driessen, Peter F.

    Spatial Sound Rendering Using Measured Room Impulse Responses Yan Li, Peter F. Driessen Dept, Banff Centre Banff, Alberta, Canada Abstract-- Spatial sound rendering has many applications different quality and complexity requirements. This paper presents a new spatial sound rendering framework

  1. Acoustic Analysis of R.E.E.L. Semi-Reveberant Sound Chamber

    E-Print Network [OSTI]

    Elliston, Sean David

    2012-07-16T23:59:59.000Z

    The Riverside Energy Efficiency Laboratory at Texas A&M University conducts sound quality testing for the Home Ventilating Institute. When the Home Ventilating Institute initially established their sound quality test, the semi-reverberant sound...

  2. A Survey of Biological Underwater Noises Off the Coast of California and in Upper Puget Sound

    E-Print Network [OSTI]

    Johnson, Martin W

    1943-01-01T23:59:59.000Z

    OF CALIFORNIA AND IN UPPER PUGET SOUND by Martin W Johnson iin noise conditions in the Puget Sound area. ii CONFIDENTIALin background noises in the Puget Sound area which had been

  3. Travel Trends Using the Puget Sound Panel Survey: A Generalized Estimating Equations Approach

    E-Print Network [OSTI]

    Yee, Julie; Niemeier, Debbie

    1998-01-01T23:59:59.000Z

    panel survey for the Puget Sound Region. Trans­ portationTravel trends using the Puget Sound Panel Table 18. Wave 1longitudinal data from the Puget Sound Transportation Panel.

  4. Controls of Magnetic Islands by Pellet Injection in Tokamaks

    SciTech Connect (OSTI)

    Shaing, K. C. [University of Wisconsin; Houlberg, Wayne A [ORNL; Peng, Yueng Kay Martin [ORNL

    2007-01-01T23:59:59.000Z

    The appearance of magnetic islands in tokamaks degrades plasma confinement. It is therefore important to control or eliminate the growth of the islands to improve the performance of a tokamak. A theory is developed to control magnetic islands using the localized pressure gradient driven bootstrap current by injecting pellets at the O-point of the island to create a peaked plasma pressure profile inside the island. This localized bootstrap current replenishes the missing equilibrium bootstrap current density that causes the island to grow in the first place. It is shown that the effect of the localized bootstrap current tends to reduce or eliminate the original drive for the growth of the island in the island evolution equation. The theory is also valid for the localized bootstrap current created by localized heating, but with much less effectiveness. A possibility of eliminating the island by controlling the equilibrium profiles is also discussed.

  5. Control of magnetic islands by pellet injection in tokamaks

    SciTech Connect (OSTI)

    Shaing, K. C. [University of Wisconsin; Rome, James A [ORNL; Peng, Yueng Kay Martin [ORNL

    2007-01-01T23:59:59.000Z

    The appearance of magnetic islands in tokamaks degrades plasma confinement. It is therefore important to control or eliminate the growth of the islands to improve the performance of a tokamak. A theory is developed to control magnetic islands using the localized pressure gradient driven bootstrap current by injecting pellets at the O-point of the island to create a peaked plasma pressure profile inside the island. This localized bootstrap current replenishes the missing equilibrium bootstrap current density that causes the island to grow in the first place. It is shown that the effect of the localized bootstrap current tends to reduce or eliminate the original drive for the growth of the island in the island evolution equation. The theory is also valid for the localized bootstrap current created by localized heating, but with much less effectiveness. A possibility of eliminating the island by controlling the equilibrium profiles is also discussed. (c) 2007 American Institute of Physics.

  6. Control of magnetic islands by pellet injection in tokamaks

    SciTech Connect (OSTI)

    Shaing, K. C.; Houlberg, W. A.; Peng, M. [Engineering Physics Department, University of Wisconsin, Madison, Wisconsin 53706 (United States); Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

    2007-07-15T23:59:59.000Z

    The appearance of magnetic islands in tokamaks degrades plasma confinement. It is therefore important to control or eliminate the growth of the islands to improve the performance of a tokamak. A theory is developed to control magnetic islands using the localized pressure gradient driven bootstrap current by injecting pellets at the O-point of the island to create a peaked plasma pressure profile inside the island. This localized bootstrap current replenishes the missing equilibrium bootstrap current density that causes the island to grow in the first place. It is shown that the effect of the localized bootstrap current tends to reduce or eliminate the original drive for the growth of the island in the island evolution equation. The theory is also valid for the localized bootstrap current created by localized heating, but with much less effectiveness. A possibility of eliminating the island by controlling the equilibrium profiles is also discussed.

  7. Laboratory studies of eddy structures and exchange processes through tidal inlets

    E-Print Network [OSTI]

    Nicolau del Roure, Francisco

    2009-06-02T23:59:59.000Z

    of the inlet. b) Longitudinal position of the center of the main vortex starting from the edge of the barrier island. c) Lateral position of the center of the main vortex starting from the edge of the barrier island. d) Circulation around the main vortex... island. d) Circulation around the main vortex. e) Maximum vorticity in the main vortex. f) Equivalent diameter of the main vortex. g) Upwelling flowing from the main vortex. ...........................................34 Figure 11 Life-history Type I...

  8. Modeling Tidal Marsh Distribution with Sea-Level Rise: Evaluating the Role of Vegetation, Sediment, and Upland

    E-Print Network [OSTI]

    Kelly, Maggi

    and lowest sediment concentrations, the island marshes became dominated by mudflat elevations. Under the same

  9. Tidal hydraulics of San Luis Pass, Texas: a field and numerical investigation

    E-Print Network [OSTI]

    Morton, Scott Jerome

    1980-01-01T23:59:59.000Z

    TIDAL HYDPAULICS OF SAN LUIS PASS, TEXAS: A FIELD AND VBKRICAL INSTIGATION A Thesis by SCOTT JEROME MORTON Submitted to the Graduate College of Texas A(II University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE August 1980 i&Iajor Subject: Ocean Engineering TIDAL HyDRAULICS OF SAN LUIS PASS, TEXAS: A FIELD AND M&IERICAL INVESTIGATION A Thesis by SCOTI' JEROIIE MORTON Approved as to style and content by: (C?airman of Committee) (Member) /member...

  10. Macroscopic traversable wormholes with zero tidal forces inspired by noncommutative geometry

    E-Print Network [OSTI]

    Peter K. F. Kuhfittig

    2015-01-08T23:59:59.000Z

    This paper addresses the following issues: (1) the possible existence of macroscopic traversable wormholes, given a noncommutative-geometry background, and (2) the possibility of allowing zero tidal forces, given a known density. It is shown that whenever the energy density describes a classical wormhole, the resulting solution is incompatible with quantum field theory. If the energy density originates from noncommutative geometry, then zero tidal forces are allowed. Also attributable to the noncommutative geometry is the violation of the null energy condition. The wormhole geometry satisfies the usual requirements, including asymptotic flatness.

  11. China Camp's race against the tides: Predicting tidal marsh survival through comparison of project sea level rise elevations and sediment accretion rates

    E-Print Network [OSTI]

    Hannah, Whitney; Kuhn, Marlene

    2012-01-01T23:59:59.000Z

    2). The lowest zone, the mudflat, is primarily unvegetatedre-suspension of existing tidal mudflat sediment (Williams

  12. Slow sound in lined flow ducts

    E-Print Network [OSTI]

    Auregan, Yves

    2015-01-01T23:59:59.000Z

    We consider the acoustic propagation in lined flow duct with a purely reactive impedance at the wall. This reacting liner has the capability to reduce the speed of sound, and thus to enhance the interaction between the acoustic propagation and the low Mach number flow ($M\\simeq0.3$). At the lower frequencies, there are typically 4 acoustic or hydrodynamic propagating modes, with 3 of them propagating in the direction of the flow. Above a critical frequency, there are only 2 propagating modes that all propagate in the direction of the flow. From the exact 2D formulation an approximate 1D model is developed to study the scattering of acoustic waves in a straight duct with varying wall impedance. This simple system, with a uniform flow and with a non-uniform liner impedance at the wall, permits to study the scattering between regions with different waves characteristics. Several situations are characterized to show the importance of negative energy waves, strong interactions between acoustic and hydrodynamic mod...

  13. U.S. Navy - San Clemente Island, California | Department of Energy

    Energy Savers [EERE]

    San Clemente Island, California U.S. Navy - San Clemente Island, California Photo of Wind Turbine on San Clemente Island, California San Clemente Island is one of the Channel...

  14. Geographic and Temporal Variability of Middle Holocene Red Abalone Middens on San Miguel Island, California

    E-Print Network [OSTI]

    Braje, Todd J

    2007-01-01T23:59:59.000Z

    survey of the south coast of San Miguel Island as part of Chaimel Islands National Park's cultural resource management plan (

  15. A Distributed Generation Control Architecture for Islanded AC Microgrids

    E-Print Network [OSTI]

    Dominguez-Garcia, Alejandro

    1 A Distributed Generation Control Architecture for Islanded AC Microgrids Stanton T. Cady, Student architecture for generation control in islanded microgrids, and illustrate the performance Member, IEEE Abstract In this paper, we propose a distributed architecture for generation control

  16. The UNIVERSITY OF DELAWARE The Canary Islands Health Care Systems

    E-Print Network [OSTI]

    Firestone, Jeremy

    The UNIVERSITY OF DELAWARE and the Present The Canary Islands Health Care Systems 3 week internship to the local community in the Canary Islands by teaching English to the local residents or volunteering

  17. Global isotopic signatures of oceanic island basalts / by

    E-Print Network [OSTI]

    Oschmann, Lynn A

    1991-01-01T23:59:59.000Z

    Sr, Nd and Pb isotopic analyses of 477 samples representing 30 islands or island groups, 3 seamounts or seamount chains, 2 oceanic ridges and 1 oceanic plateau [for a total of 36 geographic features] are compiled to form ...

  18. andres island school: Topics by E-print Network

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

    2 Solar School Program in Reunion Island Texas A&M University - TxSpace Summary: system efficiency. In Runion Island, the industrial engineering laboratory is involved in the...

  19. Community Economic Development Business Program (Prince Edward Island, Canada)

    Broader source: Energy.gov [DOE]

    The Community Economic Development Business (CEDB) program has been created as part of the Prince Edward Island Rural Action Plan to support local investment in innovative Prince Edward Island...

  20. Perceptions of nature in the Caribbean island of Dominica 

    E-Print Network [OSTI]

    Yarde, Therese Natalie

    2012-11-29T23:59:59.000Z

    The Commonwealth of Dominica has acquired a reputation as the nature island of the Caribbean. This thesis sets out to explore how Dominicans perceive and relate to nature in their nature island. It considers these perceptions ...

  1. Hearing Material 1 Perception of Material from Contact Sounds

    E-Print Network [OSTI]

    Pai, Dinesh

    of simulated enviroments. This circumstance is unfortunate, when one considers that sounds provide important, the force of impact, and the location of contact relative to object geometry. In this paper we concentrate

  2. Design and implementation of an underwater sound recording device

    SciTech Connect (OSTI)

    Martinez, Jayson J.; Myers, Joshua R.; Carlson, Thomas J.; Deng, Zhiqun; Rohrer, John S.; Caviggia, Kurt A.

    2011-09-19T23:59:59.000Z

    The purpose of this study was to design and build two versions of an underwater sound recording device. The device designed is referred to as the Underwater Sound Recorder (USR), which can be connected to one or two hydrophones or other underwater sound sensors. The URS contains a 26 dB preamplifier and a user selectable gain that permits additional amplification of input to the system from 26 dB to 46 dB. Signals within the frequency range up to 15 kHz may be recorded using the USR. Examples of USR applications are monitoring underwater processes that have the potential to create large pressure waves that could potentially harm fish or other aquatic life, such as underwater explosions or pile driving. Additional applications are recording sound generated by vessels or the vocalizations of some marine mammals, such as the calls from many species of whales.

  3. Non-Gaussianities of primordial perturbations and tensor sound speed

    E-Print Network [OSTI]

    Toshifumi Noumi; Masahide Yamaguchi

    2014-03-24T23:59:59.000Z

    We investigate the relation between the non-Gaussianities of the primordial perturbations and the sound speed of the tensor perturbations, that is, the propagation speed of the gravitational waves. We find that the sound speed of the tensor perturbations is directly related not to the auto-bispectrum of the tensor perturbations but to the cross-bispectrum of the primordial perturbations, especially, the scalar-tensor-tensor bispectrum. This result is in sharp contrast with the case of the scalar (curvature) perturbations, where their reduced sound speed enhances their auto-bispectrum. Our findings indicate that the scalar-tensor-tensor bispectrum can be a powerful tool to probe the sound speed of the tensor perturbations.

  4. Sound Waves in (2+1) Dimensional Holographic Magnetic Fluids

    E-Print Network [OSTI]

    Evgeny I. Buchbinder; Alex Buchel; Samuel E. Vazquez

    2008-12-22T23:59:59.000Z

    We use the AdS/CFT correspondence to study propagation of sound waves in strongly coupled (2+1) dimensional conformal magnetic fluids. Our computation provides a nontrivial consistency check of the viscous magneto-hydrodynamics of Hartnoll-Kovtun-Muller-Sachdev to leading order in the external field. Depending on the behavior of the magnetic field in the hydrodynamic limit, we show that it can lead to further attenuation of sound waves in the (2+1) dimensional conformal plasma, or reduce the speed of sound. We present both field theory and dual supergravity descriptions of these phenomena. While to the leading order in momenta the dispersion of the sound waves obtained from the dual supergravity description agrees with the one predicted from field theory, we find a discrepancy at higher order. This suggests that further corrections to HKMS magneto-hydrodynamics are necessary.

  5. Guessing Attacks and the Computational Soundness of Static Equivalence

    E-Print Network [OSTI]

    Warinschi, Bogdan

    Guessing Attacks and the Computational Soundness of Static Equivalence Martin Abadi1 , Mathieu static equivalence. Static equivalence depends on an underlying equa- tional theory. The choice, fundamental cryp- tographic operations. This equational theory yields a notion of static equivalence

  6. NEURAL PROCESSING OF EMOTIONAL MUSIC AND SOUNDS IN DEPRESSION

    E-Print Network [OSTI]

    Lepping, Rebecca Jo Chambers

    2013-05-31T23:59:59.000Z

    The present study uses functional MRI and an emotional sound and music paradigm to examine how neural processing of emotionally provocative auditory stimuli is altered in depression. Functional MRI was used to localize the ...

  7. afro celt sound: Topics by E-print Network

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

    the IEA R&D Wind's Topical expert meeting on Material recycling and life cycle analysis (LCA) of wind turbines 445 and the Brain Sound may seem a straightforward physical phenom-...

  8. Sound localization and interaural time sensitivity with bilateral cochlear implants

    E-Print Network [OSTI]

    Poon, Becky Bikkei

    2006-01-01T23:59:59.000Z

    Bilateral cochlear implantation is becoming more common as clinicians attempt to provide better sound-source localization and speech reception in noise for cochlear implant (CI) users. While some improvement over the ...

  9. Sound-induced micromechanical motions in an isolated cochlea preparation

    E-Print Network [OSTI]

    Page, Scott Lawrence

    2006-01-01T23:59:59.000Z

    The mechanical processes at work within the organ of Corti can be greatly elucidated by measuring both radial motions and traveling-wave behavior of structures within this organ in response to sound stimuli. To enable such ...

  10. EIS-0160: Puget Sound Area Electric Reliability Plan

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy’s Bonneville Power Administration prepared this statement to assess the environmental and socioeconomic implications of potential solutions to address a power system problem in the Puget Sound area of Washington State.

  11. HST.723 Neural Coding and Perception of Sound, Spring 2003

    E-Print Network [OSTI]

    Delgutte, Bertrand

    Neural structures and mechanisms mediating the detection, localization, and recognition of sounds. Discussion of how acoustic signals are coded by auditory neurons, the impact of these codes on behavorial performance, and ...

  12. PUGET SOUND ENERGY, INC- 14-123-LNG

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy gives notice of receipt of an application filed on September 4,  2014, by Puget Sound Energy, Inc. requesting authorization to import and export a combined total of up...

  13. Update on the Micro-X Sounding Rocket payload

    E-Print Network [OSTI]

    Figueroa-Feliciano, Enectalí

    The Micro-X High Resolution Microcalorimeter X-ray Imaging Rocket is a sounding rocket experiment that will combine a transition-edge-sensor X-ray-microcalorimeter array with a conical imaging mirror to obtain high- ...

  14. Estimates of New and Total Productivity in Central Long Island Sound from In Situ Measurements of Nitrate and Dissolved Oxygen

    E-Print Network [OSTI]

    Raymond, Peter A.

    Biogeochemical cycles in estuaries are regulated by a diverse set of physical and biological variables that operate over a variety of time scales. Using in situ optical sensors, we conducted a high-frequency time-series ...

  15. Genomic islands predict functional adaptation in marine actinobacteria

    E-Print Network [OSTI]

    Penn, Kevin

    2010-01-01T23:59:59.000Z

    Ecological adaptations among bacterial populations have been linked to genomic islands, strain-specific regions of DNA that house

  16. United States Virgin Islands: St. Thomas (Bovoni) & St. Croix (Longford)

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

    Roberts, O.; Andreas, A.

    Two measurement stations to collect wind data to support future wind power generation in the U.S. Virgin Islands.

  17. Wave Equation for Sound in Fluids with Vorticity

    E-Print Network [OSTI]

    Santiago Esteban Perez Bergliaffa; Katrina Hibberd; Michael Stone; Matt Visser

    2001-06-13T23:59:59.000Z

    We use Clebsch potentials and an action principle to derive a closed system of gauge invariant equations for sound superposed on a general background flow. Our system reduces to the Unruh (1981) and Pierce (1990) wave equations when the flow is irrotational, or slowly varying. We illustrate our formalism by applying it to waves propagating in a uniformly rotating fluid where the sound modes hybridize with inertial waves.

  18. The geometry of sound rays in a wind

    E-Print Network [OSTI]

    G. W. Gibbons; C. M. Warnick

    2011-02-11T23:59:59.000Z

    We survey the close relationship between sound and light rays and geometry. In the case where the medium is at rest, the geometry is the classical geometry of Riemann. In the case where the medium is moving, the more general geometry known as Finsler geometry is needed. We develop these geometries ab initio, with examples, and in particular show how sound rays in a stratified atmosphere with a wind can be mapped to a problem of circles and straight lines.

  19. Temporal trends of contaminants recorded in sediments of Puget Sound

    SciTech Connect (OSTI)

    Crecelius, E.A.; Curl, H.C. Jr.

    1988-03-01T23:59:59.000Z

    This paper discusses the temporal trends of contamination that can be inferred from the chemical composition of age-dated sediment cores from central Puget Sound. The fine-grain sediment (less than 10% sand) of the deep region (>150m) of central Puget Sound, which accumulates relatively undisturbed sediment at a rate of approximately 1 cm per year, provides a useful record of the history of contamination. 21 refs., 4 figs.

  20. Determination of wind from Nimbus-6 satellite sounding data 

    E-Print Network [OSTI]

    Carle, William Everett

    1979-01-01T23:59:59.000Z

    DETERMINATION OF WIND FROM NIMBUS-6 SATELLITE SOUNDING DATA A Thesis by WILLIAM EVERETT CARLE Submitted to the Graduate College of Texas A&M University in partial fulfil!. ment of the requirement for the deg. . ec of MASTER OF SCIENCE... December 1979 Major Subject: Meteorology DETEIQ&INATION OE WIND PROS1 NINEDS-6 SATELLITE SOUNDING DATA A Thesis WILLIA11 EVERETT CARLE Aporoved as to style and content by: (Chairman of Commi tee) Nember) (Head of Department) December 1979...

  1. Puget Sound area electric reliability plan. Draft environmental impact statement

    SciTech Connect (OSTI)

    Not Available

    1991-09-01T23:59:59.000Z

    The Puget Sound Area Electric Reliability Plan Draft Environmental Impact Statement (DEIS) identifies the alternatives for solving a power system problem in the Puget Sound area. This Plan is undertaken by Bonneville Power Administration (BPA), Puget Sound Power & Light, Seattle City Light, Snohomish Public Utility District No. 1 (PUD), and Tacoma Public Utilities. The Plan consists of potential actions in Puget Sound and other areas in the State of Washington. A specific need exists in the Puget Sound area for balance between east-west transmission capacity and the increasing demand to import power generated east of the Cascades. At certain times of the year, there is more demand for power than the electric system can supply in the Puget Sound area. This high demand, called peak demand, occurs during the winter months when unusually cold weather increases electricity use for heating. The existing power system can supply enough power if no emergencies occur. However, during emergencies, the system will not operate properly. As demand grows, the system becomes more strained. To meet demand, the rate of growth of demand must be reduced or the ability to serve the demand must be increased, or both. The plan to balance Puget Sound`s power demand and supply has these purposes: The plan should define a set of actions that would accommodate ten years of load growth (1994--2003). Federal and State environmental quality requirements should be met. The plan should be consistent with the plans of the Northwest Power Planning Council. The plan should serve as a consensus guideline for coordinated utility action. The plan should be flexible to accommodate uncertainties and differing utility needs. The plan should balance environmental impacts and economic costs. The plan should provide electric system reliability consistent with customer expectations. 29 figs., 24 tabs.

  2. A CLASS OF ECCENTRIC BINARIES WITH DYNAMIC TIDAL DISTORTIONS DISCOVERED WITH KEPLER

    SciTech Connect (OSTI)

    Thompson, Susan E.; Barclay, Thomas; Howell, Steve B.; Still, Martin; Ibrahim, Khadeejah A. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Everett, Mark [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States); Mullally, Fergal; Rowe, Jason; Christiansen, Jessie L.; Twicken, Joseph D.; Clarke, Bruce D. [SETI Institute, 189 Bernardo Avenue, Suite 100, Mountain View, CA 94043 (United States); Kurtz, Donald W.; Hambleton, Kelly, E-mail: susan.e.thompson@nasa.gov [Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE (United Kingdom)

    2012-07-01T23:59:59.000Z

    We have discovered a class of eccentric binary systems within the Kepler data archive that have dynamic tidal distortions and tidally induced pulsations. Each has a uniquely shaped light curve that is characterized by periodic brightening or variability at timescales of 4-20 days, frequently accompanied by shorter period oscillations. We can explain the dominant features of the entire class with orbitally varying tidal forces that occur in close, eccentric binary systems. The large variety of light curve shapes arises from viewing systems at different angles. This hypothesis is supported by spectroscopic radial velocity measurements for five systems, each showing evidence of being in an eccentric binary system. Prior to the discovery of these 17 new systems, only four stars, where KOI-54 is the best example, were known to have evidence of these dynamic tides and tidally induced oscillations. We perform preliminary fits to the light curves and radial velocity data, present the overall properties of this class, and discuss the work required to accurately model these systems.

  3. Modeling the dynamics of tidally-interacting binary neutron stars up to merger

    E-Print Network [OSTI]

    Sebastiano Bernuzzi; Alessandro Nagar; Tim Dietrich; Thibault Damour

    2015-02-18T23:59:59.000Z

    The data analysis of the gravitational wave signals emitted by coalescing neutron star binaries requires the availability of an accurate analytical representation of the dynamics and waveforms of these systems. We propose an effective-one-body (EOB) model that describes the general relativistic dynamics of neutron star binaries from the early inspiral up to merger. Our EOB model incorporates an enhanced attractive tidal potential motivated by recent analytical advances in the post-Newtonian and gravitational self-force description of relativistic tidal interactions. No fitting parameters are introduced for the description of tidal interaction in the late, strong-field dynamics. We compare the model energetics and the gravitational wave phasing with new high-resolution multi-orbit numerical relativity simulations of equal-mass configurations with different equations of state. We find agreement within the uncertainty of the numerical data for all configurations. Our model is the first semi-analytical model which captures the tidal amplification effects close to merger. It thereby provides the most accurate analytical representation of binary neutron star dynamics and waveforms currently available.

  4. innovati nNREL Uses Computing Power to Investigate Tidal Power

    E-Print Network [OSTI]

    innovati nNREL Uses Computing Power to Investigate Tidal Power Researchers at the National Renewable Energy Laboratory (NREL) have applied their knowledge of wind flow and turbulence to simulations water currents that carry a significant amount of kinetic energy. To capture this energy, several

  5. Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and Strong Sea the generator power at rated value. In this paper, two power limitation strategies with flux-weakening control by the power limitation and the rotor speed; this method enables to control the generator power at the limited

  6. Tidal Interactions and Disruptions of Giant Planets on Highly Eccentric Orbits

    E-Print Network [OSTI]

    Joshua A. Faber; Frederic A. Rasio; Bart Willems

    2004-11-15T23:59:59.000Z

    We calculate the evolution of planets undergoing a strong tidal encounter using smoothed particle hydrodynamics (SPH), for a range of periastron separations. We find that outside the Roche limit, the evolution of the planet is well-described by the standard model of linear, non-radial, adiabatic oscillations. If the planet passes within the Roche limit at periastron, however, mass can be stripped from it, but in no case do we find enough energy transferred to the planet to lead to complete disruption. In light of the three new extrasolar planets discovered with periods shorter than two days, we argue that the shortest-period cases observed in the period-mass relation may be explained by a model whereby planets undergo strong tidal encounters with stars, after either being scattered by dynamical interactions into highly eccentric orbits, or tidally captured from nearly parabolic orbits. Although this scenario does provide a natural explanation for the edge found for planets at twice the Roche limit, it does not explain how such planets will survive the inevitable expansion that results from energy injection during tidal circularization.

  7. The Distribution of Submersed Aquatic Vegetation in the Fresh and Oligohaline Tidal

    E-Print Network [OSTI]

    . Cover: Summer 2005 aerial photo of Dogue Creek and the Potomac River showing extensive dark areas to Dogue Creek, VA, 2005 ....................................................... 9 3. Percent cover of hydrilla in SAV beds located in the tidal Potomac River from Dogue Creek, VA to Quantico Creek, VA, 2005

  8. Covariation of coastal water temperature and microbial pollution at interannual to tidal periods

    E-Print Network [OSTI]

    Winant, Clinton D.

    Covariation of coastal water temperature and microbial pollution at interannual to tidal periods, California, USA Daniel B. Lluch-Cota Centro de Investigaciones Biologicas del Noroeste, La Paz, Mexico-period cooling are coincident with elevated levels of microbial pollution in the surf zone. This relationship can

  9. Multi-point tidal prediction using artificial neural network with tide-generating forces

    E-Print Network [OSTI]

    Multi-point tidal prediction using artificial neural network with tide-generating forces Hsien Available online 23 June 2006 Abstract This paper presents a neural network model of simulating tides Elsevier B.V. All rights reserved. Keywords: Neural networks; Tides; Tide-generating forces; Harmonic

  10. PHYSIOLOGICAL PERFORMANCE OF INTERTIDAL CORALLINE ALGAE DURING A SIMULATED TIDAL CYCLE1

    E-Print Network [OSTI]

    Martone, Patrick T.

    PHYSIOLOGICAL PERFORMANCE OF INTERTIDAL CORALLINE ALGAE DURING A SIMULATED TIDAL CYCLE1 Rebecca J, Lobban and Harrison 1997, Helmuth and Hofmann 2001). During high tide, intertidal algae are underwater algae may be emerged and exposed to increased light stress, elevated air tem- peratures, and increased

  11. Numerical study of the diapycnal flow through a tidal front with passive tracers

    E-Print Network [OSTI]

    Dong, Changming "Charles"

    . This qualitatively agrees with a recent field experiment using a dye tracer on Georges Bank. Additional experiments are performed to investigate the sensitivity of the tracer dispersion to the tidal phase and the location, the previous studies indicated Eulerian cross-front mean circu- lation maybe is in a multiple-cell structure

  12. Dissolved oxygen stratification in two micro-tidal partially-mixed estuaries

    E-Print Network [OSTI]

    Mallin, Michael

    Dissolved oxygen stratification in two micro-tidal partially-mixed estuaries Jing Lin a,*, Lian Xie online 21 August 2006 Abstract The controlling physical factors for vertical oxygen stratification that vertical stratification of dissolved oxygen (DO) concentration can be explained by the extended Hansen

  13. Asymmetric mixing transport: a horizontal transport mechanism for sinking plankton and sediment in tidal flows

    E-Print Network [OSTI]

    Pringle, James "Jamie"

    on the flood tide creates enhanced vertical mixing, and resuspension of sinking particles higher into the water retards the tidal flow near the bottom, this leads to a net horizontal transport toward the less]. To a large extent these larvae are at the mercy of the prevailing currents, often leading to a strong

  14. Nitrogen Cycling and Ecosystem Exchanges in a Virginia Tidal Freshwater Marsh

    E-Print Network [OSTI]

    Neubauer, Scott C.

    loading due to watershed development and urbanization. We present a process-based mass balance model of N habitats for juvenile fishes, and buffering storm and flood waters (Odum et al. 1984; Mitsch and Gosselink dominated tidal freshwater marsh in the York River estuary, Virginia. The model, which was based

  15. Final Report for Sea-level Rise Response Modeling for San Francisco Bay Estuary Tidal

    E-Print Network [OSTI]

    Fleskes, Joe

    i Final Report for Sea-level Rise Response Modeling for San Francisco Bay Estuary Tidal Marshes Refuge in northern San Francisco Bay, California. #12;iii Final Report for Sea-level Rise Response)................................................................... 7 Sea-level rise scenario model inputs

  16. An analytical solution of groundwater response to tidal fluctuation in a leaky confined aquifer

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    of China. 1. Introduction In most coastal areas, groundwater and seawater are in con- stant communicationAn analytical solution of groundwater response to tidal fluctuation in a leaky confined aquifer Jiu of the solution presented in this paper. This solution is based on a conceptual model under the assumption

  17. Tidal mixing around the Maritime continent: implications for1 paleoclimate simulations2

    E-Print Network [OSTI]

    of mechanical energy for the ocean circulation and as such is 6 being incorporated changes in the ocean thermal structure, including 12 a ~1o C warming into state-of-the-art climate models. Calculation of the tidal energy flux depends on 7

  18. Hydrodynamic Modeling, Optimization and Performance Assessment for Ducted and Non-ducted Tidal Turbines

    E-Print Network [OSTI]

    Pedersen, Tom

    Turbines by Michael Robert Shives B.Eng., Carleton University, 2008 A Dissertation Submitted in Partial Hydrodynamic Modeling, Optimization and Performance Assessment for Ducted and Non-ducted Tidal Turbines) #12;iii ABSTRACT This thesis examines methods for designing and analyzing kinetic turbines based

  19. Hydrodynamic Modeling, Optimization and Performance Assessment for Ducted and Non-ducted Tidal Turbines

    E-Print Network [OSTI]

    Victoria, University of

    Turbines by Michael Robert Shives B.Eng., Carleton University, 2008 A Thesis Submitted in Partial Hydrodynamic Modeling, Optimization and Performance Assessment for Ducted and Non-ducted Tidal Turbines examines methods for designing and analyzing kinetic turbines based on blade element momentum (BEM) theory

  20. Marine Tidal Current Electric Power Generation Technology: State of the Art and Current Status

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    resurgence in development of renewable ocean energy technology. Therefore, several demonstration projects appreciated as a vast renewable energy source. The energy is stored in oceans partly as thermal energy, partly categories: wave energy, marine and tidal current energy, ocean thermal energy, energy from salinity

  1. New constraints on the Slate Islands impact structure, Ontario, Canada

    E-Print Network [OSTI]

    Herrick, Robert R.

    New constraints on the Slate Islands impact structure, Ontario, Canada Virgil L. Sharpton Lunar, Canada John Scott ABSTRACT The Slate Islands in northern Lake Superior represent the eroded remains constrained. INTRODUCTION The Slate Islands are an 7-km-wide archipelago located in northern Lake Superior 10

  2. Stomach contents of cetaceans stranded in the Canary Islands 19962006

    E-Print Network [OSTI]

    Pierce, Graham

    Stomach contents of cetaceans stranded in the Canary Islands 1996­2006 r. fernandez1 , m.b. santos2, Kogiidae and Ziphiidae, stranded between 1996 and 2006 in the Canary Islands. Cephalopod mandibles (beaks teuthophagous whales. Keywords: feeding, Canary Islands, cetaceans, cephalopods, plastic Submitted 5 August 2008

  3. ORIGINAL PAPER Bird pollination of Canary Island endemic plants

    E-Print Network [OSTI]

    Northampton, University of

    ORIGINAL PAPER Bird pollination of Canary Island endemic plants Jeff Ollerton & Louise Cranmer /Accepted: 29 September 2008 # Springer-Verlag 2008 Abstract The Canary Islands are home to a guild Bird vision . Canary Islands . Mutualism . Pollinator. Tenerife Introduction The endemic flora

  4. ORIGINAL PAPER Bird pollination of Canary Island endemic plants

    E-Print Network [OSTI]

    Chittka, Lars

    ORIGINAL PAPER Bird pollination of Canary Island endemic plants Jeff Ollerton & Louise Cranmer) was an effective pollinator of these species. Keywords Bird vision . Canary Islands . Mutualism . Pollinator. Tenerife Introduction The endemic flora of the Canary Islands, situated off the west coast of North Africa

  5. SysBioMed Canary Islands Cancer Research

    E-Print Network [OSTI]

    Timmer, Jens

    SysBioMed Canary Islands Cancer Research Institute Winter School on Systems Biology for Medical Applications 27th February ­ 2nd March 2007 Puerto de la Cruz, Tenerife (Canary Islands) Supported by the European Commission (FP6 projects COSBICS and SysBioMed) and the Canary Islands Institute for Cancer

  6. The Urban Heat Island: Linking Science, Society, and Technology

    E-Print Network [OSTI]

    Hall, Sharon J.

    The Urban Heat Island: Linking Science, Society, and Technology Living in the desert has always much heat. As Phoenix has grown, the natural environment has been transformed from native desert: · Investigate the Urban Heat Island phenomenon · Explore the impact of the Urban Heat Island on people and other

  7. Data Update for Thompson Island, Boston Harbor, MA August 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA August 2008 Prepared for Massachusetts 2008 This update summarizes the monthly data results for the Thompson Island monitoring site in Boston this maintenance. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island for the month

  8. Data Update for Thompson Island, Boston Harbor, MA January 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA January 2008 Prepared for Massachusetts for January 2008 This update summarizes the monthly data results for the Thompson Island monitoring site is a graph of wind speed at Thompson Island for the month of January 2008, at the highest anemometer height

  9. Data Update for Thompson Island, Boston Harbor, MA February 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA February 2007 Prepared for Massachusetts for February 2007 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of February 2007, at the highest anemometer height of 40 m. #12;

  10. Data Update for Thompson Island, Boston Harbor, MA October 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA October 2007 Prepared for Massachusetts for October 2007 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of October 2007, at the highest anemometer height of 40 m. #12;

  11. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA July 2006 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA the next service visit. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  12. Data Update for Thompson Island, Boston Harbor, MA November 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA November 2008 Prepared for Massachusetts for November 2008 This update summarizes the monthly data results for the Thompson Island monitoring site is a graph of wind speed at Thompson Island for the month of November 2008, at the highest anemometer height

  13. Data Update for Thompson Island, Boston Harbor, MA November 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA November 2006 Prepared for Massachusetts for November 2006 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of November 2006, at the highest anemometer height of 40 m

  14. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA March 2007 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA speed at Thompson Island for the month of March 2007, at the highest anemometer height of 40 m. #12;

  15. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA May 2008 Prepared for Massachusetts Technology summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA, at 42° 18 below is a graph of wind speed at Thompson Island for the month of May 2008, at the highest anemometer

  16. Data Update for Thompson Island, Boston Harbor, MA November 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA November 2007 Prepared for Massachusetts for November 2007 This update summarizes the monthly data results for the Thompson Island monitoring site Data Time Series Seen below is a graph of wind speed at Thompson Island for the month of November 2007

  17. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA May 2006 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA the next site visit. · Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  18. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA March 2006 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA the spring of 2006. · Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  19. Data Update for Thompson Island, Boston Harbor, MA December 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA December 2007 Prepared for Massachusetts for December 2007 This update summarizes the monthly data results for the Thompson Island monitoring site. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island for the month of December

  20. Data Update for Thompson Island, Boston Harbor, MA January 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA January 2007 Prepared for Massachusetts for January 2007 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of January 2007, at the highest anemometer height of 40 m. #12;

  1. Data Update for Thompson Island, Boston Harbor, MA December 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA December 2008 Prepared for Massachusetts for December 2008 This update summarizes the monthly data results for the Thompson Island monitoring site is a graph of wind speed at Thompson Island for the month of December 2008, at the highest anemometer height

  2. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA July 2007 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA speed at Thompson Island for the month of July 2007, at the highest anemometer height of 40 m. #12;

  3. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA June 2008 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA to the sensor cables. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  4. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA April 2007 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA speed at Thompson Island for the month of April 2007, at the highest anemometer height of 40 m. #12;

  5. Data Update for Thompson Island, Boston Harbor, MA October 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA October 2006 Prepared for Massachusetts for October 2006 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of October 2006, at the highest anemometer height of 40 m

  6. Data Update for Thompson Island, Boston Harbor, MA September 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA September 2006 Prepared for Massachusetts for September 2006 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of September 2006, at the highest anemometer height of 40 m

  7. Data Update for Thompson Island, Boston Harbor, MA August 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA August 2006 Prepared for Massachusetts for August 2006 This update summarizes the monthly data results for the Thompson Island monitoring site Seen below is a graph of wind speed at Thompson Island for the month of August 2006, at the highest

  8. Data Update for Thompson Island, Boston Harbor, MA September 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA September 2007 Prepared for Massachusetts for September 2007 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of September 2007, at the highest anemometer height of 40 m. #12;

  9. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA June 2006 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA the next service visit. · Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  10. Data Update for Thompson Island, Boston Harbor, MA February 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA February 2006 Prepared for Massachusetts for February 2006 This update summarizes the monthly data results for the Thompson Island monitoring site of 2006. · Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island for the month

  11. Data Update for Thompson Island, Boston Harbor, MA October 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA October 2008 Prepared for Massachusetts for October 2008 This update summarizes the monthly data results for the Thompson Island monitoring site issues arose this month. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  12. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA April 2006 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA the next service visit. · Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  13. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA June 2007 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA speed at Thompson Island for the month of June 2007, at the highest anemometer height of 40 m. #12;

  14. Data Update for Thompson Island, Boston Harbor, MA August 2007

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA August 2007 Prepared for Massachusetts 2007 This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Time Series Seen below is a graph of wind speed at Thompson Island for the month of August 2007

  15. Data Update for Thompson Island, Boston Harbor, MA September 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA September 2008 Prepared for Massachusetts for September 2008 This update summarizes the monthly data results for the Thompson Island monitoring site issues arose this month. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  16. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA March 2008 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA is a graph of wind speed at Thompson Island for the month of March 2008, at the highest anemometer height

  17. Data Update for Thompson Island, Boston Harbor, MA December 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA December 2006 Prepared for Massachusetts for December 2006 This update summarizes the monthly data results for the Thompson Island monitoring site speed at Thompson Island for the month of December 2006, at the highest anemometer height of 40 m

  18. Data Update for Thompson Island, Boston Harbor, MA January 2006

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA January 2006 Prepared for Massachusetts for January 2006 This update summarizes the monthly data results for the Thompson Island monitoring site. · Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island for the month of January

  19. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA July 2008 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA to the sensor cables. Monthly Data Time Series Seen below is a graph of wind speed at Thompson Island

  20. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA May 2007 Prepared for Massachusetts Technology summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA, at 42° 18 speed at Thompson Island for the month of May 2007, at the highest anemometer height of 40 m. #12;

  1. Data Update for Thompson Island, Boston Harbor, MA February 2008

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA February 2008 Prepared for Massachusetts for February 2008 This update summarizes the monthly data results for the Thompson Island monitoring site is a graph of wind speed at Thompson Island for the month of February 2008, at the highest anemometer height

  2. Data Update for Thompson Island, Boston Harbor, MA Prepared for

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Data Update for Thompson Island, Boston Harbor, MA July 2005 Prepared for Massachusetts Technology This update summarizes the monthly data results for the Thompson Island monitoring site in Boston Harbor, MA Series #12;Seen below is a graph of wind speed at Thompson Island for the month of July 2005

  3. Virgin Islands Water Resources Research Institute Annual Technical Report

    E-Print Network [OSTI]

    and the islands' geology. Rain water harvesting is required by law and serves as the principal water sourceVirgin Islands Water Resources Research Institute Annual Technical Report FY 2009 Virgin Islands Water Resources Research Institute Annual Technical Report FY 2009 1 #12;Introduction The U. S. Virgin

  4. Virgin Islands Water Resources Research Institute Annual Technical Report

    E-Print Network [OSTI]

    always been a major concern in these small volcanic islands where rain water harvesting, ground waterVirgin Islands Water Resources Research Institute Annual Technical Report FY 2007 Virgin Islands Water Resources Research Institute Annual Technical Report FY 2007 1 #12;Introduction The United States

  5. Virgin Islands Water Resources Research Institute Annual Technical Report

    E-Print Network [OSTI]

    areas. In the U. S. Virgin Islands rain water harvesting and seawater desalination are the principalVirgin Islands Water Resources Research Institute Annual Technical Report FY 2005 Introduction The Virgin Islands Water Resources Research Institute (VI-WRRI) is located at the University of the Virgin

  6. Virgin Islands Water Resources Research Institute Annual Technical Report

    E-Print Network [OSTI]

    water harvesting are the principal sources of fresh water. Ground water supplies are very limited. WaterVirgin Islands Water Resources Research Institute Annual Technical Report FY 2008 Virgin Islands Water Resources Research Institute Annual Technical Report FY 2008 1 #12;Introduction The Virgin Islands

  7. Marine Iguanas Older Than Their Islands Jeff Mitton

    E-Print Network [OSTI]

    Mitton, Jeffry B.

    Marine Iguanas Older Than Their Islands Jeff Mitton Natural Selections (Appeared in the Boulder Camera, December 11, 2009) The Galapagos Islands ride on the Nazca plate, a tectonic plate drifting toward Ecuador at the rate of one and a half inches per year. But the Galapagos Islands will never reach

  8. Analysis of Offshore Wind Energy Leasing Areas for the Rhode Island/Massachusetts Wind Energy Area

    SciTech Connect (OSTI)

    Musial, W.; Elliott, D.; Fields, J.; Parker, Z.; Scott, G.

    2013-04-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL), under an interagency agreement with the Bureau of Ocean Energy Management (BOEM), is providing technical assistance to BOEM on the identification and delineation of offshore leasing areas for offshore wind energy development within the Atlantic Coast Wind Energy Areas (WEAs) established by BOEM in 2012. This report focuses on NREL's evaluation of BOEM's Rhode Island/Massachusetts (RIMA) WEA leasing areas. The objective of the NREL evaluation was to assess the proposed delineation of the two leasing areas and determine if the division is reasonable and technically sound. Additionally, the evaluation aimed to identify any deficiencies in the delineation. As part of the review, NREL performed the following tasks: 1. Performed a limited review of relevant literature and RIMA call nominations. 2. Executed a quantitative analysis and comparison of the two proposed leasing areas 3. Conducted interviews with University of Rhode Island (URI) staff involved with the URI Special Area Management Plan (SAMP) 4. Prepared this draft report summarizing the key findings.

  9. Contaminant loading to Puget Sound from two marinas. Puget Sound estuary program. Final report, June 1988-October 1988

    SciTech Connect (OSTI)

    Crecelius, E.A.; Fortman, T.J.; Kiesser, S.L.; Apts, C.W.; Cotter, O.A.

    1989-07-01T23:59:59.000Z

    Concentrations of Cu, Pb, Zn, PAH's, TBT and FC bacteria were measured in surface sediment, sediment-trap, and water-column samples at two marinas in Puget Sound during summer of 1988. Levels of contaminants inside the marinas were compared with levels outside. TBT had greatest elevation in marina sediments compared to reference sediments. Few of sediments exceeded Puget Sound AET sediment quality values but most did exceed PSDDA screening levels for in-water disposal of dredged sediment. All marinas estimated to contribute less than one percent of total mass loading of Cu, Pb and Zn to main basin of Puget Sound. Contribution of TBT may be much more significant if antifouling paints are the major source for Puget Sound.

  10. Evaluation of a MUSIC-based real-time sound localization of multiple sound sources in real noisy environments

    E-Print Network [OSTI]

    Chatot, Olivier

    With the goal of improving human-robot speech communication, the localization of multiple sound sources in the 3D-space based on the MUSIC algorithm was implemented and evaluated in a humanoid robot embedded in real noisy ...

  11. Sound attenuation and dispersion near the nematic-smectic A phase transition of a liquid crystal (*)

    E-Print Network [OSTI]

    Boyer, Edmond

    L-287 Sound attenuation and dispersion near the nematic- smectic A phase transition of a liquid anomalous attenuation of sound. The coupling also gives a contri- bution to the speed of sound near on the pro- pagation of longitudinal sound waves near the nema- tic-smectic A transition of liquid crystals

  12. A Robust Heart Sounds Segmentation Module Based on S-Transform

    E-Print Network [OSTI]

    Boyer, Edmond

    1 A Robust Heart Sounds Segmentation Module Based on S-Transform Ali Moukadem1, 3 , Alain Dieterlen presents a new module for heart sounds segmentation based on S-Transform. The heart sounds segmentation process segments the PhonoCardioGram (PCG) signal into four parts: S1 (first heart sound), systole, S2

  13. Energy Transition Initiative: Islands Playbook (Book)

    SciTech Connect (OSTI)

    Not Available

    2015-01-01T23:59:59.000Z

    The Island Energy Playbook (the Playbook) provides an action-oriented guide to successfully initiating, planning, and completing a transition to an energy system that primarily relies on local resources to eliminate a dependence on one or two imported fuels. It is intended to serve as a readily available framework that any community can adapt to organize its own energy transition effort.

  14. Storage conditions and eruptive dynamics of central versus flank eruptions in volcanic islands: the case of Tenerife (Canary Islands,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    : the case of Tenerife (Canary Islands, Spain) Joan Andújara,* , Fidel Costab , Bruno Scailleta a. Université1 Storage conditions and eruptive dynamics of central versus flank eruptions in volcanic islands eruptions (ca. 1 km3 ) of the Teide-Pico Viejo complex (Tenerife Island). Combined with previous

  15. Within-island differentiation and between-island homogeneity: non-equilibrium population structure in the seaweed

    E-Print Network [OSTI]

    in the seaweed Cladophoropsis membranacea (Chlorophyta) in the Canary Islands HAN J. VAN DER STRATE1, 2 , LOUIS stone model at larger spatial scales. In the present survey, 23 sites were sampled in the Canary Islands among the Canary Islands regardless of how geographic distances were computed. Only when the Canary

  16. US Army Corps of Engineers Caribbean Islands Region Version 2.0 WETLAND DETERMINATION DATA FORM Caribbean Islands Region

    E-Print Network [OSTI]

    US Army Corps of Engineers

    US Army Corps of Engineers Caribbean Islands Region ­ Version 2.0 WETLAND DETERMINATION DATA FORM ­ Caribbean Islands Region Project/Site: Municipality/Town: Sampling Date: Applicant/Owner: PR or USVI or problematic. Hydrophytic Vegetation Present? Yes No Remarks: #12;US Army Corps of Engineers Caribbean Islands

  17. On the propagation of sound waves in a stellar wind traversed by periodic strong shocks

    E-Print Network [OSTI]

    F. P. Pijpers

    1994-09-19T23:59:59.000Z

    It has been claimed that in stellar winds traversed by strong shocks the mechanism for driving the wind by sound wave pressure cannot operate because sound waves cannot propagate past the shocks. It is shown here that sound waves can propagate through shocks in one direction and that this is a sufficient condition for the sound wave pressure mechanism to work. A strong shock amplifies a sound wave passing through it and can drag the sound wave away from the star. It is immaterial for the sound wave pressure gradient that the sound wave vector points towards the star. Since the strong shocks drag the sound waves away, the star itself is the source for the sound waves propagating towards it.

  18. Pool spacing, channel morphology, and the restoration of tidal forested wetlands of the Columbia River, U.S.A.

    SciTech Connect (OSTI)

    Diefenderfer, Heida L.; Montgomery, David R.

    2008-10-09T23:59:59.000Z

    Tidal forested wetlands have sustained substantial areal losses, and restoration practitioners lack a description of many ecosystem structures associated with these late-successional systems in which surface water is a significant controlling factor on the flora and fauna. The roles of large woody debris in terrestrial and riverine ecosystems have been well described compared to functions in tidal areas. This study documents the role of large wood in forcing channel morphology in Picea-sitchensis (Sitka spruce) dominated freshwater tidal wetlands in the floodplain of the Columbia River, U.S.A. near the Pacific coast. The average pool spacing documented in channel surveys of three freshwater tidal forested wetlands near Grays Bay were 2.2 ± 1.3, 2.3 ± 1.2, and 2.5 ± 1.5. There were significantly greater numbers of pools on tidal forested wetland channels than on a nearby restoration site. On the basis of pool spacing and the observed sequences of log jams and pools, the tidal forested wetland channels were classified consistent with a forced step-pool class. Tidal systems, with bidirectional flow, have not previously been classified in this way. The classification provides a useful basis for restoration project design and planning in historically forested tidal freshwater areas, particularly in regard to the use of large wood in restoration actions and the development of pool habitats for aquatic species. Significant modifications by beaver on these sites warrant further investigation to explore the interactions between these animals and restoration actions affecting hydraulics and channel structure in tidal areas.

  19. Puget Sound Area Electric Reliability Plan : Draft Environmental Impact State.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1991-09-01T23:59:59.000Z

    The Puget Sound Area Electric Reliability Plan Draft Environmental Impact Statement (DEIS) identifies the alternatives for solving a power system problem in the Puget Sound area. This Plan is undertaken by Bonneville Power Administration (BPA), Puget Sound Power Light, Seattle City Light, Snohomish Public Utility District No. 1 (PUD), and Tacoma Public Utilities. The Plan consists of potential actions in Puget Sound and other areas in the State of Washington. A specific need exists in the Puget Sound area for balance between east-west transmission capacity and the increasing demand to import power generated east of the Cascades. At certain times of the year, there is more demand for power than the electric system can supply in the Puget Sound area. This high demand, called peak demand, occurs during the winter months when unusually cold weather increases electricity use for heating. The existing power system can supply enough power if no emergencies occur. However, during emergencies, the system will not operate properly. As demand grows, the system becomes more strained. To meet demand, the rate of growth of demand must be reduced or the ability to serve the demand must be increased, or both. The plan to balance Puget Sound's power demand and supply has these purposes: The plan should define a set of actions that would accommodate ten years of load growth (1994--2003). Federal and State environmental quality requirements should be met. The plan should be consistent with the plans of the Northwest Power Planning Council. The plan should serve as a consensus guideline for coordinated utility action. The plan should be flexible to accommodate uncertainties and differing utility needs. The plan should balance environmental impacts and economic costs. The plan should provide electric system reliability consistent with customer expectations. 29 figs., 24 tabs.

  20. Dioxin and furan concentrations in Puget Sound crabs. Puget Sound Estuary Program

    SciTech Connect (OSTI)

    Not Available

    1991-09-01T23:59:59.000Z

    Dioxin and furan concentrations were measured in crabs collected from eleven areas of potential chemical contamination and one reference area in Puget Sound in the spring of 1991. While recreationally harvestable Dungeness crabs were the target species, red rock and graceful crabs were also analyzed because they were the only species which could be collected in some areas. Both crab muscle and hepatopancreatic tissues were analyzed for the presence of dioxins and furans. The results of these analyses were evaluated using EPA's human health risk assessment guidance. While dioxins and furans were present in low concentrations in all samples, it appears that only the very heavy consumer of crab muscle and hepatopancreas would see a very sizeable increase in the risk of developing cancer from these chemicals.

  1. Local non-Gaussianity from rapidly varying sound speeds

    SciTech Connect (OSTI)

    Emery, Jon; Tasinato, Gianmassimo; Wands, David, E-mail: jon.emery@port.ac.uk, E-mail: gianmassimo.tasinato@port.ac.uk, E-mail: david.wands@port.ac.uk [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX (United Kingdom)

    2012-08-01T23:59:59.000Z

    We study the effect of non-trivial sound speeds on local-type non-Gaussianity during multiple-field inflation. To this end, we consider a multiple-DBI model and use the ?N formalism to track the super-horizon evolution of perturbations. By adopting a sum separable Hubble parameter we derive analytic expressions for the relevant quantities in the two-field case, valid beyond slow variation. We find that non-trivial sound speeds can, in principle, curve the trajectory in such a way that significant local-type non-Gaussianity is produced. Deviations from slow variation, such as rapidly varying sound speeds, enhance this effect. To illustrate our results we consider two-field inflation in the tip regions of two warped throats and find large local-type non-Gaussianity produced towards the end of the inflationary process.

  2. Sound emission from the gas of molecular superrotors

    E-Print Network [OSTI]

    Milner, A A; Milner, V

    2015-01-01T23:59:59.000Z

    We use an optical centrifuge to deposit a controllable amount of rotational energy into dense molecular ensembles. Subsequent rotation-translation energy transfer, mediated by thermal collisions, results in the localized heating of the gas and generates strong sound wave, clearly audible to the unaided ear. For the first time, the amplitude of the sound signal is analyzed as a function of the experimentally measured rotational energy. The proportionality between the two experimental observables confirms that rotational excitation is the main source of the detected sound wave. As virtually all molecules, including the main constituents of the atmosphere, are amenable to laser spinning by the centrifuge, we anticipate this work to stimulate further development in the area of photo-acoustic control and spectroscopy.

  3. Speed of sound in liquids at high pressure

    E-Print Network [OSTI]

    P., Kielczynski; S, Piekarski

    2013-01-01T23:59:59.000Z

    In this paper, a new general formula for the sound speed in adiabatic conditions ( S = const ) has been established. The sound speed depends on the mass density {\\rho} (p,T ) and the internal energy per unit mass E(p,T ), both expressed as functions of the pressure p and the temperature T . This formula has been compared with experimental data on the example of triolein over the pressure range up to 450 MPa. For experimental data, phenomenological approximate formulas have been proposed. Those formulas have two versions, depending on the 2 and 3 parameters. Both versions have been developed with the help of the new expression (Eq.8) for the sound speed. The explicit form of both approximate curves can be regarded as the result of purely phenomenological modeling. However, in this paper, these new analytical expressions have been obtained by applying the heuristic procedure described in Appendix.

  4. Sound damping constant for generalized theories of gravity

    SciTech Connect (OSTI)

    Brustein, Ram [Department of Physics, Ben-Gurion University, Beer-Sheva, 84105 (Israel); Medved, A. J. M. [Physics Department, University of Seoul, Seoul 130-743 (Korea, Republic of)

    2009-06-15T23:59:59.000Z

    The near-horizon metric for a black brane in anti-de Sitter space and the metric near the AdS boundary both exhibit hydrodynamic behavior. We demonstrate the equivalence of this pair of hydrodynamic systems for the sound mode of a conformal theory. This is first established for Einstein's gravity, but we then show how the sound damping constant will be modified from its Einstein form for a generalized theory. The modified damping constant is expressible as the ratio of a pair of gravitational couplings that are indicative of the sound-channel class of gravitons. This ratio of couplings differs from both that of the shear diffusion coefficient and the shear viscosity to entropy ratio. Our analysis is mostly limited to conformal theories, but suggestions are made as to how this restriction might eventually be lifted.

  5. Characterizing, synthesizing, and/or canceling out acoustic signals from sound sources

    DOE Patents [OSTI]

    Holzrichter, John F. (Berkeley, CA); Ng, Lawrence C. (Danville, CA)

    2007-03-13T23:59:59.000Z

    A system for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate and animate sound sources. Electromagnetic sensors monitor excitation sources in sound producing systems, such as animate sound sources such as the human voice, or from machines, musical instruments, and various other structures. Acoustical output from these sound producing systems is also monitored. From such information, a transfer function characterizing the sound producing system is generated. From the transfer function, acoustical output from the sound producing system may be synthesized or canceled. The systems disclosed enable accurate calculation of transfer functions relating specific excitations to specific acoustical outputs. Knowledge of such signals and functions can be used to effect various sound replication, sound source identification, and sound cancellation applications.

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

    SciTech Connect (OSTI)

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

    2014-04-30T23:59:59.000Z

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

  7. Non-linear evolution of the angular momentum of protostructures from tidal torques

    E-Print Network [OSTI]

    Paolo Catelan; Tom Theuns

    1996-04-15T23:59:59.000Z

    We discuss the non-linear evolution of the angular momentum L acquired by protostructures, like protogalaxies and protoclusters, due to tidal interactions with the surrounding matter inhomogeneities. The primordial density distribution is assumed to be Gaussian and the non-linear dynamics of the collisionless mass fluid is followed using Lagrangian perturbation theory. For a Cold Dark Matter spectrum, the inclusion of the leading-order Lagrangian correction terms results in a value of the rms ensemble average ^{1/2} which is only a factor of 1.3 higher than the corresponding linear estimate, irrespective of the scale. Consequently, the predictions of linear theory are rather accurate in quantifying the evolution of the angular momentum of protostructures before collapse sets in. In the Einstein-de Sitter universe, the initial torque is a good estimate for the tidal torque over the whole period during which the object is spun up.

  8. Spin alignments within the cosmic web: a theory of constrained tidal torques near filaments

    E-Print Network [OSTI]

    Codis, Sandrine; Pogosyan, Dmitry

    2015-01-01T23:59:59.000Z

    The geometry of the cosmic web drives in part the spin acquisition of galaxies. This can be explained in a Lagrangian framework, by identifying the specific long-wavelength correlations within the primordial Gaussian random field which are relevant to spin acquisition. Tidal Torque Theory is revisited in the context of such anisotropic environments, biased by the presence of a filament within a wall. The point process of filament-type saddles represents it most efficiently. The constrained misalignment between the tidal and the inertia tensors in the vicinity of filament-type saddles simply explains the distribution of spin directions. This misalignment implies in particular an azimuthal orientation for the spins of more massive galaxies and a spin alignment with the filament for less massive galaxies. This prediction is found to be in qualitative agreement with measurements in Gaussian random fields and N-body simulations. It relates the transition mass to the geometry of the saddle, and accordingly predicts...

  9. Suggested guidelines for anti-islanding screening.

    SciTech Connect (OSTI)

    Ellis, Abraham; Ropp, Michael

    2012-02-01T23:59:59.000Z

    As increasing numbers of photovoltaic (PV) systems are connected to utility systems, distribution engineers are becoming increasingly concerned about the risk of formation of unintentional islands. Utilities desire to keep their systems secure, while not imposing unreasonable burdens on users wishing to connect PV. However, utility experience with these systems is still relatively sparse, so distribution engineers often are uncertain as to when additional protective measures, such as direct transfer trip, are needed to avoid unintentional island formation. In the absence of such certainty, utilities must err on the side of caution, which in some cases may lead to the unnecessary requirement of additional protection. The purpose of this document is to provide distribution engineers and decision makers with guidance on when additional measures or additional study may be prudent, and also on certain cases in which utilities may allow PV installations to proceed without additional study because the risk of an unintentional island is extremely low. The goal is to reduce the number of cases of unnecessary application of additional protection, while giving utilities a basis on which to request additional study in cases where it is warranted.

  10. Resuspension studies in the Marshall Islands

    SciTech Connect (OSTI)

    Shinn, J.H.; Homan, D.N.; Robison, W.L. [Lawrence Livermore National Lab., CA (United States)

    1997-07-01T23:59:59.000Z

    The contribution of inhalation exposure to the total dose for residents of the Marshall Islands was monitored at occasions of opportunity on several islands in the Bikini and Enewetak Atolls. To determine the long-term potential for inhalation exposure, and to understand the mechanisms of redistribution and personal exposure, additional investigations were undertaken on Bikini Island under modified and controlled conditions. Experiments were conducted to provide key parameters for the assessment of inhalation exposure from plutonium-contaminated dust aerosols: characterization of the contribution of plutonium in soil-borne aerosols as compared to sea spray and organic aerosols, determination of plutonium resuspension rates as measured by the meteorological flux-gradient method during extreme conditions of a bare-soil vs. a stabilized surface, determination of the approximate individual exposures to resuspended plutonium by traffic, and studies of exposures to individuals in different occupational environments simulated by personal air sampling of workers assigned to a variety of tasks. Enhancement factors (defined as ratios of the plutonium-activity), of suspended aerosols relative to the plutonium-activity of the soil were determined to be less than 1 (typically 0.4 to 0.7) in the undisturbed, vegetated areas, but greater than 1 (as high as 3) for the case studies of disturbed bare soil, roadside travel, and for occupational duties in fields and in and around houses. 12 refs., 5 figs., 8 tabs.

  11. On viscosity, conduction and sound waves in the intracluster medium

    E-Print Network [OSTI]

    A. C. Fabian; C. S. Reynolds; G. B. Taylor; R. J. H. Dunn

    2005-08-04T23:59:59.000Z

    Recent X-ray and optical observations of the Perseus cluster indicate that the viscous and conductive dissipation of sound waves is the mechanism responsible for heating the intracluster medium and thus balancing radiative cooling of cluster cores. We discuss this mechanism more generally and show how the specific heating and cooling rates vary with temperature and radius. It appears that the heating mechanism is most effective above 10^7K, which allows for radiative cooling to proceed within normal galaxy formation but will stifle the growth of very massive galaxies. The scaling of the wavelength of sound waves with cluster temperature and feedback in the system are investigated.

  12. Sound waves and the absence of Galilean invariance in flocks

    E-Print Network [OSTI]

    Yuhai Tu; John Toner; Markus Ulm

    1997-10-21T23:59:59.000Z

    We study a model of flocking for a very large system (N=320,000) numerically. We find that in the long wavelength, long time limit, the fluctuations of the velocity and density fields are carried by propagating sound modes, whose dispersion and damping agree quantitatively with the predictions of our previous work using a continuum equation. We find that the sound velocity is anisotropic and characterized by its speed $c$ for propagation perpendicular to the mean velocity $$, $$ itself, and a third velocity $\\lambda $, arising explicitly from the lack of Galilean invariance in flocks.

  13. Puget Sound acidity levels drop after ASARCO shutdown

    SciTech Connect (OSTI)

    Not Available

    1987-07-01T23:59:59.000Z

    The levels of acidity in Puget Sound region rainfall have decreased significantly since the shutdown of the ASARCO copper smelter in Tacoma, Washington, according to a study funded by the US Environmental Protection Agency. Results indicate that sulfate and hydrogen ion concentrations obtained from samples taken before the closure were significantly different than those collected after the shutdown. Rainwater samples collected downwind during smelter operation were also significantly different from those collected upwind. Sulfur dioxide is considered to be one of the principal contributors to acid rain. The smelter was a major source of sulfur dioxide emissions in the Puget Sound region before it shut down in March 1985.

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

    SciTech Connect (OSTI)

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

    2011-10-01T23:59:59.000Z

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

  15. EVOLUTION OF PLANETARY ORBITS WITH STELLAR MASS LOSS AND TIDAL DISSIPATION

    SciTech Connect (OSTI)

    Adams, Fred C. [Physics Department, University of Michigan, Ann Arbor, MI 48109 (United States)] [Physics Department, University of Michigan, Ann Arbor, MI 48109 (United States); Bloch, Anthony M. [Math Department, University of Michigan, Ann Arbor, MI 48109 (United States)] [Math Department, University of Michigan, Ann Arbor, MI 48109 (United States)

    2013-11-10T23:59:59.000Z

    Intermediate mass stars and stellar remnants often host planets, and these dynamical systems evolve because of mass loss and tides. This paper considers the combined action of stellar mass loss and tidal dissipation on planetary orbits in order to determine the conditions required for planetary survival. Stellar mass loss is included using a so-called Jeans model, described by a dimensionless mass loss rate ? and an index ?. We use an analogous prescription to model tidal effects, described here by a dimensionless dissipation rate ? and two indices (q, p). The initial conditions are determined by the starting value of angular momentum parameter ?{sub 0} (equivalently, the initial eccentricity) and the phase ? of the orbit. Within the context of this model, we derive an analytic formula for the critical dissipation rate ?, which marks the boundary between orbits that spiral outward due to stellar mass loss and those that spiral inward due to tidal dissipation. This analytic result ? = ?(?, ?, q, p, ?{sub 0}, ?) is essentially exact for initially circular orbits and holds to within an accuracy of ?50% over the entire multi-dimensional parameter space, where the individual parameters vary by several orders of magnitude. For stars that experience mass loss, the stellar radius often displays quasi-periodic variations, which produce corresponding variations in tidal forcing; we generalize the calculation to include such pulsations using a semi-analytic treatment that holds to the same accuracy as the non-pulsating case. These results can be used in many applications, e.g., to predict/constrain properties of planetary systems orbiting white dwarfs.

  16. Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism

    E-Print Network [OSTI]

    M. Nagasawa; S. Ida; T. Bessho

    2008-01-09T23:59:59.000Z

    We have investigated the formation of close-in extrasolar giant planets through a coupling effect of mutual scattering, Kozai mechanism, and tidal circularization, by orbital integrations. We have carried out orbital integrations of three planets with Jupiter-mass, directly including the effect of tidal circularization. We have found that in about 30% runs close-in planets are formed, which is much higher than suggested by previous studies. We have found that Kozai mechanism by outer planets is responsible for the formation of close-in planets. During the three-planet orbital crossing, the Kozai excitation is repeated and the eccentricity is often increased secularly to values close enough to unity for tidal circularization to transform the inner planet to a close-in planet. Since a moderate eccentricity can remain for the close-in planet, this mechanism may account for the observed close-in planets with moderate eccentricities and without nearby secondary planets. Since these planets also remain a broad range of orbital inclinations (even retrograde ones), the contribution of this process would be clarified by more observations of Rossiter-McLaughlin effects for transiting planets.

  17. Lagoon and tidal flat sedimentation of the Upper Devonian Nisku Formation in southern Alberta

    SciTech Connect (OSTI)

    Slingsby, A. (Norcen Energy Resources Ltd., Calgary, Alberta (Canada)); Kissling, D.L. (Jackalope Geological Ltd., Lafayette, CO (United States))

    1991-06-01T23:59:59.000Z

    Since 1985, 26 oil pools containing 64 million bbl of oil in place have been discovered in the Nisku Formation in southern Alberta. The thoroughly dolomitized Nisku Formation varies from 20 to 30 m thick in southern Alberta and northern Montana. It overlies anhydrites and shaly carbonates of the Southesk or Duperow formations and underlies anhydrites of the Stettler or Potlatch formation. Burrowed, nodular-bedded skeletal wackestone, deposited over a shallow marine shelf, forms the basal Nisku Formation. These strata are succedded diachronously and unconformably by several tidal-flat and lagoon facies that include (1) southeast-thinning washover fans of cross-bedded peloidal grainstone; (2) laminated mudstone to current-bedded peloidal and intraclastic grainstone sourced within the lagoon; (3) stromatolitic mudstones; (4) laminated anhydrite beds precipitated during salina episodes; (5) Amphipora and brachiopod wackestones and thrombolites containing Renalcis, serpulids, and ostracoes, marking a brief marine invasion; and (6) brackish or freshwater shale and mudstone containing fragmented lycopod leaves and antiarch fish remains. These sediments are overlain by cross-bedded, peloidal, and calcisiltite grainstone and stromatolitic mudstone deposited in tidal channels and over shoals. All facies have been subjected to periodic subareal exposure which has produced leaching, solution collapse brecciation, teepee structures, and nodular-mosaic and void-filling anhydrite. Permeable reservoirs exist where leached, dolomitized tidal flat and lagoon sediments contain intercrystalline and pelmoldic porosity and little anhydrite cement.

  18. Origin of Tidal Dissipation in Jupiter: I. Properties of Inertial-Mode

    E-Print Network [OSTI]

    Yanqin Wu

    2005-11-28T23:59:59.000Z

    We study global inertial-modes with the purpose of unraveling the role they play in the tidal dissipation process of Jupiter. For spheres of uniformly rotating, neutrally buoyant fluid, we show that the partial differential equation governing inertial-modes can be separated into two ordinary differential equations when the density is constant, or when the density has a power-law dependence on radius. For more general density dependencies, we show that one can obtain an approximate solution to the inertial-modes that is accurate to the second order in wave-vector. Frequencies of inertial-modes are limited to $\\omega < 2 \\Omega$ ($\\Omega$ is the rotation rate), with modes propagating closer to the rotation axis having higher frequencies. An inertial-mode propagates throughout much of the sphere with a relatively constant wavelength, and a wave amplitude that scales with density as $1/\\sqrt{\\rho}$. It is reflected near the surface at a depth that depends on latitude, with the depth being much shallower near the special latitudes $\\theta = \\cos^{-1} \\pm \\omega/2\\Omega$. Around this region, this mode has the highest wave amplitude as well as the sharpest spatial gradient (the ``singularity belt''), thereby incurring the strongest turbulent dissipation. Inertial-modes naturally cause small Eulerian density perturbations, so they are only weakly coupled to the tidal potential. In a companion paper, we attempt to apply these results to the problem of tidal dissipation in Jupiter.

  19. Tidal salt marshes of the southeast Atlantic Coast: A community profile

    SciTech Connect (OSTI)

    Wiegert, R.G.; Freeman, B.J.

    1990-09-01T23:59:59.000Z

    This report is part of a series of community profiles on the ecology of wetland and marine communities. This particular profile considers tidal marshes of the southeastern Atlantic coast, from North Carolina south to northern Florida. Alone among the earth's ecosystems, coastal communities are subjected to a bidirectional flooding sometimes occurring twice each day; this flooding affects successional development, species composition, stability, and productivity. In the tidally influenced salt marsh, salinity ranges from less than 1 ppt to that of seawater. Dominant plant species include cordgrasses (Spartina alterniflora and S. cynosuroides), black needlerush (Juncus romerianus), and salt marsh bulrush (Scirpus robustus). Both terrestrail and aquatic animals occur in salt marshes and include herons, egrets ospreys (Pandion haliaetus), bald eagles (Haliaeetus leucocephalus), alligators (Alligator Mississippiensis), manatees (Trichecus manatus), oysters, mussels, and fiddler crabs. Currently, the only significant direct commercial use of the tidal salt marshes is by crabbers seeking the blue crab Callinectes sapidus, but the marshes are quite important recreationally, aesthetically, and educationally. 151 refs., 45 figs., 6 tabs.

  20. Tidally dominated depositional environment for the Mt. Simon Sandstone in central Illinois

    SciTech Connect (OSTI)

    Sargent, M.L.; Lasemi, Z. (Illinois State Geological Survey, Champaign, IL (United States))

    1993-03-01T23:59:59.000Z

    Several hundred feet of core from the upper part of the Mt. Simon in central Illinois have been examined macroscopically. Grain sizes and their systematics, bedding characteristics, sedimentary structures, and relationships among beds show that the upper Mt. Simon Sandstone is composed of a series of fining-upward cycles up to 10 m (30 feet) thick. A typical cycle consists, in ascending order, of a sandy subtidal facies, a mixed sand and mud intertidal-flat facies, and a muddy upper tidal-flat facies upward through the succession, the maximum and average grain size becomes progressively finer and the cycles thinner. The lower sandstone of each cycle contains beds that are massive to cross bedded and cross laminated; some beds show scoured reactivation surfaces. A few cycles contain a middle unit characterized by flaser and lenticular bedding and abundant mudcracks. Mudcracks also are common in the shale beds at the top of each cycle. Sedimentary structures such as reactivation surfaces, flaser and lenticular bedding, and mudcracks suggest that these cycles were deposited in peritidal environments. The presence of Skolithos in some cycles suggests very shallow marine conditions. The within-cycle upward fining is caused by regression or progradation that reflects a progressive decrease in current velocity from subtidal to intertidal parts of the tidal flat. Frequent flooding of the tidal flat resulted in repeated fining-upward cycles within the upper part of the Mt. Simon Sandstone.