Now showing items 285-304 of 845

  • 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 ...
  • Experiments in a rotating source-sink annulus 

    Ingram, Richard Grant (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1971-08)
    An experimental investigation of the different flow regimes in a rotating source-sink annulus is described. Both the steady and transient velocities are measured over a large range of Ekman Reynolds number and Rossby number. ...
  • Exploring the climate change refugia potential of equatorial Pacific coral reefs 

    Drenkard, Elizabeth J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-02)
    Global climate models project a 21st century strengthening of the Pacific Equatorial Undercurrent (EUC). The consequent increase in topographic upwelling of cool waters onto equatorial coral reef islands would mitigate ...
  • Exploring the distribution and physiological roles of bacterial membrane lipids in the marine environment 

    Saenz, James P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-06)
    Lipids have a legacy in the geologic record extending back to the Archaean. Since the phylogenetic diversity of life is reflected in the structural diversity of biomolecules, lipid biomarkers that are shown to be diagnostic ...
  • 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 ...
  • Faunal biogeography, community structure, and genetic connectivity of North Atlantic seamounts 

    Cho, Walter W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-09)
    The mechanisms of faunal dispersal across ocean basins are key unknowns toward understanding of the modern biogeography and biodiversity of deep-sea fauna. Seamounts are considered to play a defining role in faunal ...
  • 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 ...
  • Feeding habits of the yellowtail flounder and production of its invertebrate prey on Georges Bank 

    Collie, Jeremy S. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1985-09)
    As part of the Georges Bank Benthic Infauna Monitoring Program, size-frequency analysis was used to study the life history and production of three benthic amphipod species: Ampelisca agassizi, Unciola inermis and Ericthonius ...
  • Feminization in common terns (Sterna hirunda) : relationship to persistent organic contaminants 

    Hart, Constance A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-01)
    Concern about skewed sex ratios and female-female pairings among endangered roseate terns (Sterna dougallii) on Bird Island in Buzzards Bay, Massachusetts prompted studies with common terns from the same site as a surrogate ...
  • Field deployable dynamic lighting system for turbid water imaging 

    Gorman, Geoffrey A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-09)
    The ocean depths provide an ever changing and complex imaging environment. As scientists and researches strive to document and study more remote and optically challenging areas, specifically scatter-limited environments. ...
  • A field investigation of diffusion within a submerged plant canopy 

    Tarrell, Alvin E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-09)
    Saltwater marshes and wetlands are important buffers at the land-sea interface. Among the most biologically active ecosystems on Earth, natural and man-made wetlands are important interceptors of pollutants and nutrients ...
  • Field measurements of a swell band, shore normal, flux divergence reversal 

    Link, Shmuel G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-06)
    Throughout this thesis we will discuss the theoretical background and empirical observation of a swell band shore normal flux divergence reversal. Specifically, we will demonstrate the existence and persistence of the ...
  • Fine-grained sedimentation on the Chenier Plain Coast and inner continental shelf, northern Gulf of Mexico 

    Draut, Amy E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-06)
    This thesis examines the evolution of a mud-dominated coastal sedimentary system on multiple time scales. Fine-grained systems exhibit different properties and behavior from sandy coasts, and have received relatively ...
  • Finestructure and turbulence in the deep ocean 

    Hendricks, Peter J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1977-01)
    Millimeter scale fluctuations in refractive index recorded with a freely sinking shadowgraph system are correlated with finestructure profiles of temperature, salinity and density and compared to models of ocean turbulence. ...
  • Flow and sediment properties influencing erosion of fine-grained marine sediments : sea floor and laboratory experiments 

    Young, Robert Alexander (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1975-09)
    Erosion processes involving fine-grained marine sediments were studied by using an in situ flume to erode undisturbed bottom sediments on the sea floor in Buzzards Bay, a shallow marine embayment off the Massachusetts coast. ...
  • Flow and skin friction over natural rough beds 

    Paola, Christopher (Woods Hole Oceanographic Institution, 1983-06)
    The first of two sets of data reported here, measured over two-dimensional immobile current ripples, comprises skin-friction time series at four streamwise positions and velocity profiles measured to within a few mm of ...
  • Flow over finite isolated topography 

    Thompson, LuAnne (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-11)
    One and two layer models are used to study flow over axisymmetric isolated topography. Inviscid or nearly inviscid flow in which non-linear effects have order one importance is considered, and both the effects of β and ...
  • Fluid flow and sound generation at hydrothermal vent fields 

    Little, Sarah A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-04-08)
    Several experiments are presented in this thesis which examine methods to measure and monitor fluid flow from hydrothermal vent fields. Simultaneous velocity, temperature, and conductivity data were collected in the ...
  • Fluxes, dynamics and chemistry of particulates in the ocean 

    Gardner, Wilford D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1977-10)
    Sediment traps designed to yield quantitative data of particulate fluxes have been deployed and successfully recovered on four moorings in the deep sea. The traps were designed after extensive calibration of different ...
  • The Flying Fish, an untethered oceanographic sensor platform with acoustic homing capability 

    Hoyt, Joshua King (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1986-05)
    The Flying Fish is an autonomous, streamlined, gravity driven underwater vehicle of high speed (15 knots) vertical excursions to depths of 6000 meters. This prototype uses short baseline acoustic interferometry to guide ...