Now showing items 123-142 of 841

  • Calculation of 3-dimensional synthetic seismograms on the connection machine 

    Allen, Julie M.; Burns, D. R. (Woods Hole Oceanographic Institution, 1989-10)
    A three dimensional, second order finite difference method was used to create synthetic seismograms for elastic wave propagation in heterogeneous media. These synthetic seismograms are used to model rough seafloor, the ...
  • Calibration of broadband active acoustic systems using a single standard spherical target 

    Stanton, Timothy K.; Chu, Dezhang (Acoustical Society of America, 2008-07)
    When calibrating a broadband active acoustic system with a single standard target such as a sphere, the inherent resonances associated with the scattering by the sphere pose a significant challenge. In this paper, a method ...
  • Calibration sphere for low-frequency parametric sonars 

    Foote, Kenneth G.; Francis, David T. I.; Atkins, Philip R. (Acoustical Society of America, 2007-03)
    The problem of calibrating parametric sonar systems at low difference frequencies used in backscattering applications is addressed. A particular parametric sonar is considered: the Simrad TOPAS PS18 Parametric Sub-bottom ...
  • Categorizing the severity of paralytic shellfish poisoning outbreaks in the Gulf of Maine for forecasting and management 

    Kleindinst, Judith L.; Anderson, Donald M.; McGillicuddy, Dennis J.; Stumpf, Richard P.; Fisher, Kathleen M.; Couture, Darcie A.; Hickey, J. Michael; Nash, Christopher (2013-03)
    Development of forecasting systems for harmful algal blooms (HABs) has been a long-standing research and management goal. Significant progress has been made in the Gulf of Maine, where seasonal bloom forecasts are now being ...
  • CFD study of hydrodynamic signal perception by fish using the lateral line system 

    Rapo, Mark A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-02)
    The lateral line system on fish has been found to aid in schooling behavior, courtship communication, active and passive hydrodynamic imaging, and prey detection. The most widely used artificial prey stimulus has been ...
  • A channel subspace post-filtering approach to adaptive equalization 

    Nadakuditi, Rajesh Rao (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2002-02)
    One of the major problems in wireless communications is compensating for the time-varying intersymbol interference (ISI) due to multipath. Underwater acoustic communications is one such type of wireless communications ...
  • Characterization of underwater target geometry from Autonomous Underwater Vehicle sampling of bistatic acoustic scattered fields 

    Fischell, Erin M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-06)
    One of the long term goals of Autonomous Underwater Vehicle (AUV) minehunting is to have multiple inexpensive AUVs in a harbor autonomously classify hazards. Existing acoustic methods for target classification using ...
  • Characterizing the deep insular shelf coral reef habitat of the Hind Bank marine conservation district (US Virgin Islands) using the Seabed autonomous underwater vehicle 

    Armstrong, Roy A.; Singh, Hanumant; Torres, Juan; Nemeth, Richard S.; Can, Ali; Roman, Christopher N.; Eustice, Ryan M.; Riggs, Lauren; Garcia-Moliner, Graciela (2005-10-26)
    The benthic communities of the deep insular shelf at the Hind Bank Marine Conservation District (MCD), an important spawning grouper aggregation site, were studied with the Seabed autonomous underwater vehicle (AUV) at ...
  • Chemical data quantify Deepwater Horizon hydrocarbon flow rate and environmental distribution 

    Ryerson, Thomas B.; Camilli, Richard; Kessler, John D.; Kujawinski, Elizabeth B.; Reddy, Christopher M.; Valentine, David L.; Atlas, Elliot; Blake, Donald R.; de Gouw, Joost; Meinardi, Simone; Parrish, David D.; Peischl, Jeff; Seewald, Jeffrey S.; Warneke, Carsten (2011-11-11)
    Detailed airborne, surface, and subsurface chemical measurements, primarily obtained in May and June 2010, are used to quantify initial hydrocarbon compositions along different transport pathways – in deep subsurface plumes, ...
  • Circulation and intrusions northeast of Taiwan : chasing and predicting uncertainty in the cold dome 

    Gawarkiewicz, Glen G.; Jan, Sen; Lermusiaux, Pierre F.J.; McClean, Julie L.; Centurioni, Luca R.; Taylor, Kevin; Cornuelle, Bruce D.; Duda, Timothy F.; Wang, Joe; Yang, Yiing Jiang; Sanford, Thomas B.; Lien, Ren-Chieh; Lee, Craig M.; Lee, Ming-An; Leslie, Wayne; Haley, Patrick J.; Niiler, Pearn P.; Gopalakrishnan, Ganesh; Velez-Belchi, Pedro; Lee, Dong-Kyu; Kim, Yoo Yin (The Oceanography Society, 2011-12)
    An important element of present oceanographic research is the assessment and quantification of uncertainty. These studies are challenging in the coastal ocean due to the wide variety of physical processes occurring on a ...
  • Classification of broadband echoes from prey of a foraging Blainville's beaked whale 

    Jones, Benjamin A.; Stanton, Timothy K.; Lavery, Andone C.; Johnson, Mark P.; Madsen, Peter T.; Tyack, Peter L. (Acoustical Society of America, 2008-03)
    Blainville's beaked whales (Mesoplodon densirostris) use broadband, ultrasonic echolocation signals with a −10 dB bandwidth from 26 to 51 kHz to search for, localize, and approach prey that generally consist of mid-water ...
  • Clicking for calamari : toothed whales can echolocate squid Loligo pealeii 

    Madsen, Peter T.; Wilson, M.; Johnson, Mark P.; Hanlon, Roger T.; Bocconcelli, Alessandro; Aguilar De Soto, Natacha; Tyack, Peter L. (Inter-Research, 2007-11-27)
    Squid play an important role in biomass turnover in marine ecosystems and constitute a food source for ~90% of all echolocating toothed whale species. Nonetheless, it has been hypothesized that the soft bodies of squid ...
  • Climate change, precipitation and impacts on an estuarine refuge from disease 

    Levinton, Jeffrey; Doall, Michael; Ralston, David K.; Starke, Adam; Allam, Bassem (Public Library of Science, 2011-04-28)
    Oysters play important roles in estuarine ecosystems but have suffered recently due to overfishing, pollution, and habitat loss. A tradeoff between growth rate and disease prevalence as a function of salinity makes the ...
  • Climatological mean circulation at the New England shelf break 

    Zhang, Weifeng G.; Gawarkiewicz, Glen G.; McGillicuddy, Dennis J. (American Meteorological Society, 2011-10)
    A two-dimensional cross-shelf model of the New England continental shelf and slope is used to investigate the mean cross-shelf and vertical circulation at the shelf break and their seasonal variation. The model temperature ...
  • A climatology of the Middle Atlantic Bight shelfbreak front 

    Linder, Christopher A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-09)
    Description of the shelfbreak front in the Middle Atlantic Bight is hampered by the extreme variability of the front. In order to gain more insight into the mean frontal structure and associated baroclinic jet, historical ...
  • Coastal ocean circulation influences on remotely sensed optical properties : a West Florida Shelf case study 

    Weisberg, Robert H.; He, Ruoying; Kirkpatrick, Gary; Muller-Karger, Frank E.; Walsh, John J. (Oceanography Society, 2004-06)
    Satellite-sensed ocean optical features are derived from a combination of factors, including the concentration of water properties by the ocean circulation and the modifications of these properties by biological and ...
  • Coastal ocean processes symposium : a tribute to William D. Grant, September 27 - September 30, 1998 

    Grant, William D. (Woods Hole Oceanographic Institution, 1999-05)
    This report is a compilation of abstracts distrbuted at the Coastal Ocean Processes Symposium: A Tribute to Willam D. Grant at the Woods Hole Oceanographic Institution from September 27 - September 30, 1998.
  • Coastal ocean variability off the coast of Taiwan in response to Typhoon Morakot : river forcing, atmospheric forcing, and cold dome dynamics 

    Landry, Jennifer J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-09)
    The ocean is a complex, constantly changing, highly dynamical system. Prediction capabilities are constantly being improved in order to better understand and forecast ocean properties for applications in science, industry, ...
  • Coastal ocean wind fields gauged against the performance of an ocean circulation model 

    He, Ruoying; Liu, Yonggang; Weisberg, Robert H. (American Geophysical Union, 2004-07-17)
    Atmosphere model-derived flux fields are used to force coastal ocean models. Coarse resolution and incomplete boundary layer dynamics limit the accuracy of these forcing fields and hence the performance of the ocean models. ...
  • A code-division, multiple beam sonar imaging system 

    Richardson, John M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-08)
    In this thesis, a new active sonar imaging concept is explored using the principle of code-division and the simultaneous transmission of multiple coded signals. The signals are sixteen symbol, four-bit, non-linear, block ...