Now showing items 291-310 of 842

  • Evaluation of transport relative to the tidal mixing front on southern Georges Bank 

    Katrein, Jody M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-09)
    As part of Phase III of the U.S. GLOBEC Georges Bank program, drogued drifters and dye tracer were released into the pycnocline on the southern flank of Georges Bank to measure advective and diffusive transport relative ...
  • Evaluation of vector sensors for adaptive equalization in underwater acoustic communication 

    Lewis, Matthew R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-09)
    Underwater acoustic communication is an extremely complex field that faces many challenges due to the time-varying nature of the ocean environment. Vector sensors are a proven technology that when utilizing their directional ...
  • Evidence for hydrogen oxidation and metabolic plasticity in widespread deep-sea sulfur-oxidizing bacteria 

    Anantharaman, Karthik; Breier, John A.; Sheik, Cody S.; Dick, Gregory J. (2012-11-08)
    Hydrothermal vents are a well-known source of energy that powers chemosynthesis in the deep sea. Recent work suggests that microbial chemosynthesis is also surprisingly pervasive throughout the dark oceans, serving as a ...
  • Exact reconstruction of ocean bottom velocity profiles from monochromatic scattering data 

    Merab, Andre A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-01)
    This thesis presents the theoretical and computational underpinnings of a novel approach to the determination of the acoustic parameters of the ocean bottom using a monochromatic source. The problem is shown to be ...
  • Exactly sparse delayed-state filters for view-based SLAM 

    Eustice, Ryan M.; Singh, Hanumant; Leonard, John J. (IEEE, 2006-12)
    This paper reports the novel insight that the simultaneous localization and mapping (SLAM) information matrix is exactly sparse in a delayed-state framework. Such a framework is used in view-based representations of the ...
  • Examining the effects of mid ocean ridge topography on 3D marine magnetometric resistivity model responses 

    Lassner, Lisa A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2004-06)
    Methods which measure seafloor resistivity are uniquely suited to studying hydrothermal circulation in the crust. The magnetometric resistivity (MMR) technique is a galvanic method which uses a bipole current source with ...
  • Expectation-maximization analysis of spatial time series 

    Smith, Keston W.; Aretxabaleta, Alfredo L. (Copernicus Publications on behalf of the European Geosciences Union and the American Geophysical Union, 2007-02-01)
    Expectation maximization (EM) is used to estimate the parameters of a Gaussian Mixture Model for spatial time series data. The method is presented as an alternative and complement to Empirical Orthogonal Function (EOF) ...
  • Expendable oceanographic mooring (XMOOR) 

    Frye, Daniel E.; Peters, Donald B.; Arthur, Richard (Woods Hole Oceanographic Institution, 1997-04)
    An expendable, self-deploying mooring (XMOOR) for shallow water applications has been developed to address Navy requirements for environmental monitoring. The project has been conducted jointly between the Woods Hole ...
  • An experimental analysis of the dynamics of a submerged tethered cradle in a seaway 

    Cohen, Jay Martin (Woods Hole Oceanographic Institution, 1972-06)
    Submerged recovery of small submersibles by means of surface tethered platforms offers the possibility of operations in sea states higher than is now possible using surface recovery means. The Woods Hole Oceanographic ...
  • Experimental and numerical studies of sound propagation over a submarine canyon northeast of Taiwan 

    Lin, Ying-Tsong; Duda, Timothy F.; Emerson, Chris; Gawarkiewicz, Glen G.; Newhall, Arthur E.; Calder, Brian; Lynch, James F.; Abbot, Philip A.; Yang, Yiing-Jang; Jan, Sen (IEEE, 2015-01-09)
    A study of sound propagation over a submarine canyon northeast of Taiwan was made using mobile acoustic sources during a joint ocean acoustic and physical oceanographic experiment in 2009. The acoustic signal levels ...
  • Experimental evaluation of CTD package hydrodynamic behavior and recommendations for improved lowering techniques 

    Berteaux, Henri O.; Walden, Robert G.; Clay, Peter R.; McDevitt, R. E. (Woods Hole Oceanographic Institution, 1983-07)
    This report is the last of a series of three reports on a comprehensive study of CTD instrument lowering mechanics. The first report, WHOI 79-81, "A Study of CTD Cables and Lowering Systems", examines the causes and ...
  • Experimental evidence of three-dimensional acoustic propagation caused by nonlinear internal waves 

    Frank, Scott D.; Badiey, Mohsen; Lynch, James F.; Siegmann, William L. (Acoustical Society of America, 2005-08)
    The 1995 SWARM experiment collected high quality environmental and acoustic data. One goal was to investigate nonlinear internal wave effects on acoustic signals. This study continues an investigation of broadband airgun ...
  • Experimental investigation of scattering from randomly rough elastic cylinders 

    Gurley, John V. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-09)
    Acoustical backscattering from randomly rough infinitely long elastic cylinders surrounded by a fluid medium is examined. The cylinder radius is allowed to vary along its lengthwise axis creating one-dimensional rotationally ...
  • Experimental stress analysis of model of emergency forebody release device used in deep diving research submarines Alvin, Sea Cliff and Turtle 

    Sharp, Arnold G.; Sullivan, James R. (Woods Hole Oceanographic Institution, 1969-08)
    Tests were conducted on a full-scale model of the emergency forebody release used in the deep-diving submarines ALVIN, SEA CLIFF and TURTLE. The model was machined from metal to the same dimensional tolerances as the ...
  • An experimental study of air entrainment by breaking waves 

    Lamarre, Eric (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-05)
    Breaking waves charge the surface layer of the ocean with small air bubbles which play an important role in air-sea gas transfer and in underwater acoustics near the ocean surface. This work reports on a series of ...
  • Experiments and numerical simulations of the dynamics of an R.O.V. thruster during maneuvering 

    Knowles, James H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-09)
    Propeller dynamics have typically been ignored in controller design, lumped into the category of 'unmodeled dynamics.' This is acceptable for propellers operating at constant speed in relatively uniform flows. Operational ...
  • Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean 

    Sohn, Robert A.; Willis, Claire; Humphris, Susan E.; Shank, Timothy M.; Singh, Hanumant; Edmonds, Henrietta N.; Kunz, Clayton G.; Hedman, Ulf; Helmke, Elisabeth; Jakuba, Michael V.; Liljebladh, Bengt; Linder, Julia; Murphy, Christopher A.; Nakamura, Ko-ichi; Sato, Taichi; Schlindwein, Vera; Stranne, Christian; Tausenfreund, Upchurch; Winsor, Peter; Jakobsson, Martin; Soule, Samuel A. (2007-11-26)
    Roughly 60% of the Earth’s outer surface is comprised of oceanic crust formed by volcanic processes at mid-ocean ridges (MORs). Although only a small fraction of this vast volcanic terrain has been visually surveyed ...
  • Extracting energy from unsteady flows through vortex control 

    Streitlien, Knut (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-09)
    Vortex control is a new paradigm in fluid mechanics, with applications to propulsion and wake reduction. A heaving and pitching hydrofoil placed in a flow with an array of oncoming vortices can achieve a very high ...
  • The feasibility of sodar wind profile measurements from an oceanographic buoy 

    Berg, Allison M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-09)
    This thesis explores the feasibility of making wind speed measurements from an oceanographic buoy using a Doppler sodar. In the fall of 2005, we deployed a Scintec SFAS sodar on an ASIS buoy. Roughly one week of buoy ...
  • Feasibility study of non-invasive telemetry techniques for use with submarine telephone cables 

    Brown, Neil L.; Frye, Daniel E.; Proakis, John (Woods Hole Oceanographic Institution, 1993-01)
    The feasibility of using inductive coupling with existing submarine telephone cables for telemetry of data from ocean sensors was investigated. The submarine telephone cable was simulated with a computer model and the ...