Now showing items 534-553 of 860

  • Morphometric analysis of ears in two families of pinnipeds 

    Marsh, Sarah Elizabeth (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-08)
    Pinniped (seal and sea lion) auditory systems operate in two acoustically distinct environments, air and water. Piniped species differ in how much time they typically spend in water. They therefore offer an exceptional ...
  • Motion sensitivity of flame ionization detectors 

    Gularte, Ronald Carl (Woods Hole Oceanographic Institution, 1972-05)
    A portable gas chromatograph, using a single flame ionization detector, was constructed. The unit was tested for response to surge, sway and heave accelerations up to 0.3g. Also the detector's response was studied for ...
  • A multi-dimensional spectral description of ocean variability with applications 

    Wortham, Cimarron J. L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-02)
    Efforts to monitor the ocean for signs of climate change are hampered by ever-present noise, in the form of stochastic ocean variability, and detailed knowledge of the character of this noise is necessary for estimating ...
  • Multichannel maximum entropy method of spectral analysis applied to offshore structures 

    Briggs, Michael Jeffrey (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1981-06)
    The multichannel Maximum Entropy Method (MEM) of spectral analysis is developed and applied in the dynamic analysis of offshore structures. Two different algorithms are implemented and compared with the conventional ...
  • Multiple equilibria and low-frequency variability of wind-driven ocean models 

    Primeau, Francois W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
    The steady states of two models of the double-gyre wind-driven ocean circulation are studied. The link between the steady state solutions of the models and their time-mean and low-frequency variability is explored to ...
  • 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: ...
  • Mutant analysis of luminescence and autoinduction in a marine bacterium 

    Kuo, Alan J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-12)
    The marine symbiotic bacterium Vibrio fischeri is striking for its ability both to emit light and to dramatically regulate light emission using a cell-to-cell signalling mechanism called autoinduction. The latter is ...
  • N2 fixation by subsurface populations of Trichodesmium : an important source of new nitrogen to the North Atlantic Ocean 

    Heithoff, Abigail (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-02)
    Trichodesmium, a genus of diazotrophic cyanobacteria, is an important contributor to the marine nitrogen (N) and carbon (C) cycles. The extent to which Trichodesmium dinitrogen (N2) fixation contributes to the marine N ...
  • Natural and synthetic estrogens in wastewater treatment plant effluent and the coastal ocean 

    Griffith, David R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-09)
    Steroidal estrogens are potent endocrine disrupting chemicals that are naturally excreted by vertebrates (e.g., humans and fish) and can enter natural waters through the discharge of treated and raw sewage. Because ...
  • The nature and origin of fine-scale sea-floor relief 

    Shih, John Shai-Fu (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979-12)
    Bathymetric profiles of mid-ocean ridges show that the morphology of ridge crests and the roughness of sea-floor relief created there is commonly related to the spreading rate. To study the creation of fine-scale sea-floor ...
  • 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 ...
  • Near-equatorial deep circulation in the Indian and Pacific oceans 

    Johnson, Gregory C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-09)
    Theory and observations of deep circulation in the near-equatorial Atlantic, Indian and Pacific Oceans are reviewed. Flow of deep and bottom water in the near-equatorial Indian and Pacific oceans, the two oceans with ...
  • Near-inertial and thermal upper ocean response to atmospheric forcing in the North Atlantic Ocean 

    Silverthorne, Katherine E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-06)
    Observational and modeling techniques are employed to investigate the thermal and inertial upper ocean response to wind and buoyancy forcing in the North Atlantic Ocean. First, the seasonal kinetic energy variability of ...
  • New insights on the ecology of free-living heterotrophic nanoflagellates based on the use of molecular biological approaches 

    Lim, Ee Lin (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-03)
    Nanoplanktonic protists comprise a diverse assemblage of flagellate species responsible for various trophic processes in marine and freshwater ecosystems. Current methods for identifying small protists do not readily ...
  • Nitrogen cycling in oxygen deficient zones : insights from δ15N and δ18O of nitrite and nitrate 

    Buchwald, Carolyn (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-02)
    The stable isotopes, δ15N and δ18O, of nitrite and nitrate can be powerful tools used to interpret nitrogen cycling in the ocean. In order to interpret isotope profiles, the isotope systematics of each process involved ...
  • Nitrogen isotopes in chlorophyll and the origin of Eastern Mediterranean sapropels 

    Sachs, Julian P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-02)
    The goals of this thesis were: (1) to establish methods for the determination of nitrogen and carbon isotope ratios in marine particulate and sedimentary chlorophyll derivatives; (2) to establish chlorophyll δ15N and ...
  • 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 interactions among standing surface and internal gravity waves 

    Joyce, Terrence M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1972-06)
    A laboratory study has been undertaken to measure the momentum transfer from surface to internal gravity waves in a nonlinear, resonant interaction. The interacting waves form triads for which σ1s - σ2s ± σI = 0 and κ1s - ...
  • 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, ...
  • A numerical model of mixing and convection driven by surface buoyancy flux 

    Wang, Xiaoming (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-09)
    This thesis studies mixing and convection in a rectangular basin driven by a specified heat flux at the surface. A numerical model is constructed for this purpose. The main focus of the study is on the density and ...