Now showing items 923-942 of 980

    • U.S. GLOBEC Georges Bank long-term moored program : part 1 - mooring configuration 

      Irish, James D.; Kerry, S.; Fucile, Paul D.; Beardsley, Robert C.; Lord, Jeffrey; Brink, Kenneth H. (Woods Hole Oceanographic Institution, 2005-12)
      As part of the U.S. GLOBEC Northwest Atlantic/Georges Bank program, moorings were deployed on Georges Bank as part of the broad-scale survey component to help measure the temporal variability of both physical and biological ...
    • Ultimate ocean depth packaging for a digital ring laser gyroscope 

      Bowen, Martin F. (Woods Hole Oceanographic Institution, 1998-07-30)
      A Honeywell GG 1320AN Digital Ring Laser Gyroscope (RLG), typically an aviation sensor, has been adapted for use as part of a navigation package rated to ocean depths of 6,000 meters. Researchers and engineers at the Deep ...
    • Uncertainty quantification in ocean state estimation 

      Kalmikov, Alexander G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-02)
      Quantifying uncertainty and error bounds is a key outstanding challenge in ocean state estimation and climate research. It is particularly difficult due to the large dimensionality of this nonlinear estimation problem ...
    • Undersea acoustic research 

      Spindel, Robert C. (Woods Hole Oceanographic Institution, 1984-01)
      This is the final report of Contract N00014-77-C-0196 between the Woods Hole Oceanographic Institution and the Office of Naval Research for the contract period l January 1977 to 28 February 1983. This contract supported ...
    • Understanding and utilizing waveguide invariant range-frequency striations in ocean acoustic waveguides 

      Cockrell, Kevin L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-02)
      Much of the recent research in ocean acoustics has focused on developing methods to exploit the effects that the sea surface and seafloor have on acoustic propagation. Many of those methods require detailed knowledge of ...
    • Understanding interannual, decadal level variability in paralytic shellfish poisoning toxicity in the Gulf of Maine : the HAB Index 

      Anderson, Donald M.; Couture, Darcie A.; Kleindinst, Judith L.; Keafer, Bruce A.; McGillicuddy, Dennis J.; Martin, Jennifer L.; Richlen, Mindy L.; Hickey, J. Michael; Solow, Andrew R. (2013-09)
      A major goal in harmful algal bloom (HAB) research has been to identify mechanisms underlying interannual variability in bloom magnitude and impact. Here the focus is on variability in Alexandrium fundyense blooms and ...
    • Underwater acoustic communication over Doppler spread channels 

      Eggen, Trym H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-06)
      This work is concerned with coherent communication by means of acoustic signals over underwater communication channels. The estimated scattering functions of real data ranging from the Arctic environment to tropical ...
    • Underwater acoustics research at the Woods Hole Oceanographic Institution, 1930-1960 

      Lynch, James F.; Newhall, Arthur E.; Frosch, Robert A. (Acoustical Society of America, 2016-06-23)
      The Woods Hole Oceanographic Institution (WHOI) was founded in 1930, and throughout its history has had a strong involvement in research into the science and applications of sound in the ocean. In terms of a brief history, ...
    • Underwater imaging system performance characterization 

      Jaffe, Jules S. (Woods Hole Oceanographic Institution, 1988-08)
      The correct design of underwater camera systems for viewing underwater objects is vitally important if the performance of these underwater imaging systems is to be maximized. Towards this goal, the Woods Hole Oceanographic ...
    • Underwater optical measurement of position and orientation using a prepared, passive target 

      Nickolaisen, Niel R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-09)
      In order to provide an accurate and efficient method of docking, station keeping, and navigation for the JASON remotely operated vehicle, an optical tracking method is investigated. The method needs to be accurate enough ...
    • Underwater tunable organ-pipe sound source 

      Morozov, Andrey K.; Webb, Douglas C. (Acoustical Society of America, 2007-08)
      A highly efficient frequency-controlled sound source based on a tunable high-Q underwater acoustic resonator is described. The required spectrum width was achieved by transmitting a linear frequency-modulated signal and ...
    • Universal criteria for blind deconvolution 

      Shalvi, Ofir; Weinstein, Ehud (Woods Hole Oceanographic Institution, 1990-02)
      We present necessary and sufficient conditions for blind equalization/deconvolution (without observing the input) of an unknown, possible non-minimum phase linear time invariant system (channel). Based on that, we propose ...
    • The unpredictable nature of internal tides on continental shelves 

      Nash, Jonathan D.; Kelly, Samuel M.; Shroyer, Emily L.; Moum, James N.; Duda, Timothy F. (American Meteorological Society, 2012-11)
      Packets of nonlinear internal waves (NLIWs) in a small area of the Mid-Atlantic Bight were 10 times more energetic during a local neap tide than during the preceding spring tide. This counterintuitive result cannot be ...
    • Upper mantle electrical resistivity structure beneath the central Mariana subduction system 

      Matsuno, Tetsuo; Seama, Nobukazu; Evans, Rob L.; Chave, Alan D.; Baba, Kiyoshi; White, Antony; Goto, Tada-nori; Heinson, Graham; Boren, Goran; Yoneda, Asami; Utada, Hisashi (American Geophysical Union, 2010-09-02)
      This paper reports on a magnetotelluric (MT) survey across the central Mariana subduction system, providing a comprehensive electrical resistivity image of the upper mantle to address issues of mantle dynamics in the mantle ...
    • Upward nitrate transport by phytoplankton in oceanic waters : balancing nutrient budgets in oligotrophic seas 

      Villareal, Tracy A.; Pilskaln, Cynthia H.; Montoya, Joseph P.; Dennett, Mark R. (PeerJ, 2014-03-13)
      In oceanic subtropical gyres, primary producers are numerically dominated by small (1–5 µm diameter) pro- and eukaryotic cells that primarily utilize recycled nutrients produced by rapid grazing turnover in a highly efficient ...
    • Upward swimming of competent oyster larvae Crassostrea virginica persists in highly turbulent flow as detected by PIV flow subtraction 

      Wheeler, Jeanette D.; Helfrich, Karl R.; Anderson, Erik J.; McGann, B.; Staats, P.; Wargula, Anna E.; Wilt, K.; Mullineaux, Lauren S. (Inter-Research, 2013-08-15)
      Investigating settlement responses in the transitory period between planktonic and benthic stages of invertebrates helps shape our understanding of larval dispersal and supply, as well as early adult survival. Turbulence ...
    • Use of commercial off-the-shelf digital cameras for scientific data acquisition and scene-specific color calibration 

      Akkaynak, Derya; Treibitz, Tali; Xiao, Bei; Gurkan, Umut A.; Allen, Justine J.; Demirci, Utkan; Hanlon, Roger T. (Optical Society of America, 2014-01-20)
      Commercial off-the-shelf digital cameras are inexpensive and easy-to-use instruments that can be used for quantitative scientific data acquisition if images are captured in raw format and processed so that they maintain a ...
    • The use of mesoscale eddies by juvenile loggerhead sea turtles (Caretta caretta) in the southwestern Atlantic 

      Gaube, Peter; Barceló, Caren; McGillicuddy, Dennis J.; Domingo, Andrés; Miller, Philip; Giffoni, Bruno; Marcovaldi, Neca; Swimmer, Yonat (Public Library of Science, 2017-03-01)
      Marine animals, such as turtles, seabirds and pelagic fishes, are observed to travel and congregate around eddies in the open ocean. Mesoscale eddies, large swirling ocean vortices with radius scales of approximately 50–100 ...
    • Use of SF5CF3 for ocean tracer release experiments 

      Ho, David T.; Ledwell, James R.; Smethie, William M. (American Geophysical Union, 2008-02-19)
      SF6 tracer release experiments (TREs) have provided fundamental insights in many areas of Oceanography. Recently, SF6 has emerged as a powerful transient tracer, generating a need for an alternative tracer for large-scale ...
    • Use of spectroscopy for assessment of color discrimination in animal vision 

      Akkaynak, Derya (Optical Society, 2013-12-19)
      Animals use color vision for a number of tasks including food localization, object recognition, communication, and mate selection. For these and other specific behaviors involving the use of color cues, models that quantify ...