Now showing items 537-556 of 888

  • Multipurpose acoustic networks in the integrated Arctic Ocean observing system 

    Mikhalevsky, Peter N.; Sagen, Hanne; Worcester, Peter F.; Baggeroer, Arthur B.; Orcutt, John A.; Moore, Sue E.; Lee, Craig M.; Vigness-Raposa, Kathleen J.; Freitag, Lee E.; Arrott, Matthew; Atakan, Kuvvet; Beszczynska-Moller, Agnieszka; Duda, Timothy F.; Dushaw, Brian D.; Gascard, Jean-Claude; Gavrilov, Alexander N.; Keers, Henk; Morozov, Andrey K.; Munk, Walter H.; Rixen, Michel; Sandven, Stein; Skarsoulis, Emmanuel; Stafford, Kathleen M.; Vernon, Frank L.; Yuen, Mo Yan (Arctic Institute of North America, 2015)
    The dramatic reduction of sea ice in the Arctic Ocean will increase human activities in the coming years. This activity will be driven by increased demand for energy and the marine resources of an Arctic Ocean accessible ...
  • Multisensor modeling underwater with uncertain information 

    Stewart, W. Kenneth (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-07-05)
    This thesis develops an approach to the construction of multidimensional stochastic models for intelligent systems exploring an underwater environment. The important characteristics shared by such applications are: ...
  • The N456 Navigator system 

    Abrams, Lane J. (Woods Hole Oceanographic Institution, 2009-01)
    The N456 Navigator has been developed to assist in Long Baseline (LBL) acoustic navigation. Its two basic functions are generation of acoustic signals, and receipt and timing of returns. When combined with the new dsnav ...
  • Navigation and manipulation for autonomous underwater dismantling of offshore structures 

    Welch, Christian L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-09)
    The dismantling of offshore structures, known as decommissioning, is a complex task in the oil and gas industry, driven by strict environmental standards. As the environments in which decommissioning is necessary become ...
  • Navigation for the Derbyshire Phase2 Survey 

    Lerner, Steven A.; Yoerger, Dana R.; Crook, T. (Woods Hole Oceanographic Institution, 1999-04)
    In 1997, the Deep Submergence Operations Group of the Woods Hole Oceanographic Institution conducted an underwater forensic survey of the UK bulk-carrier MV Derbyshire with a suite of underwater vehicles. This report ...
  • Navigational infrastructure at the East Pacific Rise 9°50′N area following the 2005–2006 eruption : seafloor benchmarks and near-bottom multibeam surveys 

    Soule, Samuel A.; Ferrini, Vicki L.; Kinsey, James C.; Fornari, Daniel J.; Sellers, Cynthia J.; White, Scott M.; Von Damm, Karen L.; Carbotte, Suzanne M. (American Geophysical Union, 2008-11-06)
    Four seafloor benchmarks were deployed with ROV Jason2 at frequently visited areas along the northern East Pacific Rise (NEPR) ridge crest near 9°50′N, within the Ridge2000 EPR integrated study site (ISS) bull's eye. When ...
  • Near-bottom circulation and dispersion of sediment containing Alexandrium fundyense cysts in the Gulf of Maine during 2010–2011 

    Aretxabaleta, Alfredo L.; Butman, Bradford; Signell, Richard P.; Dalyander, P. Soupy; Sherwood, Christopher R.; Sheremet, Vitalii A.; McGillicuddy, Dennis J. (Elsevier, 2013-12-13)
    The life cycle of Alexandrium fundyense in the Gulf of Maine includes a dormant cyst stage that spends the winter predominantly in the bottom sediment. Wave-current bottom stress caused by storms and tides induces resuspension ...
  • Near-surface ocean temperature 

    Ward, Brian (American Geophysical Union, 2006-02-11)
    The first open ocean deployment of the Skin Depth Experimental Profiler (SkinDeEP) was from the R/V Melville in the Gulf of California during the Marine Optical Characterization Experiment (MOCE–5). SkinDeEP is an ...
  • Net community production of oxygen derived from in vitro and in situ 1-D modeling techniques in a cyclonic mesoscale eddy in the Sargasso Sea 

    Mourino-Carballido, Beatriz; Anderson, Laurence A. (Copernicus Publications on behalf of the European Geosciences Union, 2009-08-26)
    It has been proposed that the disagreement traditionally reported between in vitro incubation and in situ estimates of oxygen net community production (NCP) could be explained, at least partially, by undersampling episodic ...
  • A new approach to estimation of global air-sea gas transfer velocity fields using dual-frequency altimeter backscatter 

    Frew, Nelson M.; Glover, David M.; Bock, Erik J.; McCue, Scott J. (American Geophysical Union, 2007-11-03)
    A new approach to estimating air-sea gas transfer velocities based on normalized backscatter from the dual-frequency TOPEX and Jason-1 altimeters is described. The differential scattering of Ku-band (13.6 GHz) and C-band ...
  • New broadband methods for resonance classification and high-resolution imagery of fish with swimbladders using a modified commercial broadband echosounder 

    Stanton, Timothy K.; Chu, Dezhang; Jech, J. Michael; Irish, James D. (Oxford University Press, 2010-01-05)
    A commercial acoustic system, originally designed for seafloor applications, has been adapted for studying fish with swimbladders. The towed system contains broadband acoustic channels collectively spanning the frequency ...
  • Non-linear dynamic intertwining of rods with self-contact 

    Goyal, Sachin; Perkins, N. C.; Lee, Christopher L. (2007-10)
    Twisted marine cables on the sea floor can form highly contorted three-dimensional loops that resemble tangles. Such tangles or ‘hockles’ are topologically equivalent to the plectomenes that form in supercoiled DNA ...
  • Non-Rayleigh acoustic scattering characteristics of individual fish and zooplankton 

    Stanton, Timothy K.; Chu, Dezhang; Reeder, D. Benjamin (IEEE, 2004-04)
    It has long been known that the statistical properties of acoustic echoes from individual fish can have non-Rayleigh characteristics. The statistical properties of echoes from zooplankton are generally less understood. In ...
  • Non-Rayleigh scattering by a randomly oriented elongated scatterer 

    Bhatia, Saurav (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-08)
    The echo statistics of a randomly rough, randomly oriented prolate spheroid that is randomly located in a beampattern are investigated from physics-based principles both analytically and by Monte Carlo methods. This is ...
  • Nonlinear generation and loss of infragravity wave energy 

    Henderson, Stephen M.; Guza, R. T.; Elgar, Steve; Herbers, T. H. C.; Bowen, A. J. (American Geophysical Union, 2006-12-08)
    Nonlinear energy transfers with sea and swell (frequencies 0.05–0.40 Hz) were responsible for much of the generation and loss of infragravity wave energy (frequencies 0.005–0.050 Hz) observed under moderate- and low-energy ...
  • North Atlantic right whales (Eubalaena glacialis) ignore ships but respond to alerting stimuli 

    Nowacek, Douglas P.; Johnson, Mark P.; Tyack, Peter L. (Royal Society, 2003-12-03)
    North Atlantic right whales were extensively hunted during the whaling era and have not recovered. One of the primary factors inhibiting their recovery is anthropogenic mortality caused by ship strikes. To assess risk ...
  • The North Pacific Acoustic Laboratory deep-water acoustic propagation experiments in the Philippine Sea 

    Worcester, Peter F.; Dzieciuch, Matthew A.; Mercer, James A.; Andrew, Rex K.; Dushaw, Brian D.; Baggeroer, Arthur B.; Heaney, Kevin D.; D'Spain, Gerald L.; Colosi, John A.; Stephen, Ralph A.; Kemp, John N.; Howe, Bruce M.; Van Uffelen, Lora J.; Wage, Kathleen E. (Acoustical Society of America, 2013-10)
    A series of experiments conducted in the Philippine Sea during 2009–2011 investigated deep-water acoustic propagation and ambient noise in this oceanographically and geologically complex region: (i) the 2009 North Pacific ...
  • A note about Gaussian statistics on a sphere 

    Chave, Alan D. (Oxford University Press, 2015-07)
    The statistics of directional data on a sphere can be modelled either using the Fisher distribution that is conditioned on the magnitude being unity, in which case the sample space is confined to the unit sphere, or using ...
  • A novel trigger-based method for hydrothermal vents prospecting using an autonomous underwater robot 

    Ferri, Gabriele; Jakuba, Michael V.; Yoerger, Dana R. (2010-04)
    In this paper we address the problem of localizing active hydrothermal vents on the seafloor using an Autonomous Underwater Vehicle (AUV). The plumes emitted by hydrothermal vents are the result of thermal and chemical ...
  • Numerical and experimental analysis of initial water impact of an air-dropped REMUS AUV 

    Roe, Stephen Michael (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-02)
    The initial water impact of a free-falling object is primarily related to the fluid forces on the wetted surface of the object. The shape-dependent added-mass coefficients express the fluid forces integrated over the body, ...