Now showing items 625-644 of 899

    • Postprocessing system for echo sounder data 

      Foote, Kenneth G.; Knudsen, Hans Petter; Korneliussen, Rolf J.; Nordbø, Per Erik; Røang, Kjell (Acoustical Society of America, 1991-07)
      Echo sounding is a powerful and widely used technique for remote sensing of the marine environment. In order to enhance the power of the echo sounder, a postprocessing system has been designed and realized in standard ...
    • Predicted scattering of sound by diffuse hydrothermal vent plumes at mid-ocean ridges 

      Duda, Timothy F.; Trivett, D. Andrew (Acoustical Society of America, 1998-01)
      Amplitude and phase fluctuations of monochromatic acoustic signals traveling through diffuse mid-ocean ridge hydrothermal vent plumes are modeled using existing theory in an attempt to find suitable frequencies and path ...
    • Predicting seabed burial of cylinders by wave-induced scour : application to the sandy inner shelf off Florida and Massachusetts 

      Trembanis, Arthur C.; Friedrichs, Carl T.; Richardson, Michael D.; Traykovski, Peter A.; Howd, Peter A.; Elmore, Paul A.; Wever, Thomas F. (IEEE, 2007-01)
      A simple parameterized model for wave-induced burial of mine-like cylinders as a function of grain-size, time-varying, wave orbital velocity and mine diameter was implemented and assessed against results from inert ...
    • Predicting wave-induced ripple equilibrium geometry 

      Nelson, Timothy R.; Voulgaris, George; Traykovski, Peter A. (John Wiley & Sons, 2013-06-28)
      A comprehensive database of existing (since 1954) field and laboratory measurements of ripple geometry is compiled and combined with newly collected field data to examine the performance of ripple equilibrium predictors. ...
    • The prediction, verification, and significance of flank jets at mid-ocean ridges 

      Lavelle, J. William; Thurnherr, Andreas M.; Mullineaux, Lauren S.; McGillicuddy, Dennis J.; Ledwell, James R. (The Oceanography Society, 2012-03)
      One aspect of ocean flow over mid-ocean ridges that has escaped much attention is the capacity of a ridge to convert oscillatory flows into unidirectional flows. Those unidirectional flows take the form of relatively narrow ...
    • Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion 

      Lindstrom, Timothy E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-09)
      A model is developed for the prediction of the seismo-acoustic noise spectrum in the microseism peak region (0.1 to 0.7 Hz). The model uses a theory developed by Cato [J. Acoust. Soc. Am., 89 , 1096-1112 (1991)] for an ...
    • Preface 

      Anderson, Donald M.; McGillicuddy, Dennis J.; DeGrasse, Stacey L.; Sellner, Kevin G.; Bricelj, V. Monica; Turner, Jefferson T.; Townsend, David W.; Kleindinst, Judith L. (2014-02)
      The Gulf of Maine (GOM) is a continental shelf sea in the northwest Atlantic, USA that supports highly-productive shellfisheries that are frequently contaminated by toxigenic Alexandrium fundyense blooms and outbreaks of ...
    • Preliminary acoustic and oceanographic observations from the ASIAEX 2001 South China Sea Experiment 

      Newhall, Arthur E.; Costello, Lawrence; Duda, Timothy F.; Dunn, James M.; Gawarkiewicz, Glen G.; Irish, James D.; Kemp, John N.; McPhee, Neil M.; Liberatore, Stephen P.; Lynch, James F.; Ostrom, William M.; Schroeder, Ted; Trask, Richard P.; von der Heydt, Keith (Woods Hole Oceanographic Institution, 2001-09)
      The Asian Seas International Experiment (ASIAEX) was a very successful scientific collaboration between the United States of America (USA), the People’s Republic of China (PRC), Taiwan (ROC), the Republic of Korea (ROK), ...
    • Preliminary acoustic and oceanographic observations from the winter Primer experiment 

      Newhall, Arthur E.; von der Heydt, Keith; Sperry, Brian J.; Gawarkiewicz, Glen G.; Lynch, James F. (Woods Hole Oceanographic Institution, 1998-10)
      A joint acoustics and physical oceanography experiment was conducted in the winter of 1997 on the shell break and continental slope south of New England in the Middle Atlantic Bight (figure 1). This experiment, Primer4, ...
    • Preliminary examination of the low-frequency ambient noise field in the South China Sea during the 2001 ASIAEX experiment 

      Wei, Ruey-Chang; Chen, Chi-Fang; Newhall, Arthur E.; Lynch, James F.; Duda, Timothy F.; Liu, Chih-Sheng; Lin, Po-Chang (IEEE, 2004-10)
      This correspondence presents a preliminary examination of the low frequency ambient noise field measured in the South China Sea component of the Asian Seas International Acoustics Experiment (ASIAEX), concentrating on the ...
    • A preliminary investigation into the ecology and behavior of blue whales (Balaenoptera musculus) in the Gulf of Corcovado, Chile 

      Bocconcelli, Alessandro; Hickmott, Leigh; Landea Briones, Rafaela; Howes, Gloria; Sayigh, Laela S. (Woods Hole Oceanographic Institution, 2014-09)
      A joint effort between WHOI and the Melimoyu Ecosystem Research Institute (MERI) sought to gain a better understanding of a population of blue whales (Balaenoptera musculus) in the Gulf of Corcovado, Chile. A cruise in ...
    • A preliminary study of shallow-water sonar issues : signal motion loss and reverberation noise 

      Stewart, W. Kenneth; Chu, Dezhang; Tang, Xiaoou (Woods Hole Oceanographic Institution, 1993-09)
      This preliminary investigation addresses key program elements for sonar sensing in a shallow-water environment to establish bounds on possible solutions and to reduce program uncertainty. The modeling and experimental ...
    • A probabilistic evaluation of tank ship damage in grounding events 

      Rawson, Charles E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
      Recent international and domestic regulatory actions have resulted in significant changes to oil tanker designs and intensified attention on predicting tanker environmental performance following groundings or collisions. ...
    • Probabilistic evaluation of tankship damage in collision events 

      Crake, Kurtis W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
      An analytical method for precidicting the extent of damage in ship collisions is developed. The method calculates both the longitudinal and transverse extents of damage for the struck ship as a function of collision ...
    • Process modeling studies of physical mechanisms of the formation of an anticyclonic eddy in the central Red Sea 

      Chen, Changsheng; Li, Ruixiang; Pratt, Lawrence J.; Limeburner, Richard; Beardsley, Robert C.; Bower, Amy S.; Jiang, Houshuo; Abualnaja, Yasser; Xu, Qichun; Lin, Huichan; Liu, Xuehai; Lan, Jian; Kim, Taewan (John Wiley & Sons, 2014-02-25)
      Surface drifters released in the central Red Sea during April 2010 detected a well-defined anticyclonic eddy around 23°N. This eddy was ∼45–60 km in radius, with a swirl speed up to ∼0.5 m/s. The eddy feature was also ...
    • Progress and challenges in coupled hydrodynamic-ecological estuarine modeling 

      Ganju, Neil K.; Brush, Mark J.; Rashleigh, Brenda; Aretxabaleta, Alfredo L.; del Barrio, Pilar; Grear, Jason S.; Harris, Lora A.; Lake, Samuel J.; McCardell, Grant; O’Donnell, James; Ralston, David K.; Signell, Richard P.; Testa, Jeremy M.; Vaudrey, Jamie M. P. (Springer, 2015-07-07)
      Numerical modeling has emerged over the last several decades as a widely accepted tool for investigations in environmental sciences. In estuarine research, hydrodynamic and ecological models have moved along parallel tracks ...
    • Progressively communicating rich telemetry from autonomous underwater vehicles via relays 

      Murphy, Christopher A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-06)
      As analysis of imagery and environmental data plays a greater role in mission construction and execution, there is an increasing need for autonomous marine vehicles to transmit this data to the surface. Without access ...
    • A prony algorithm for shallow water waveguide analysis 

      Diemer, Ferdinand J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-08)
      Low frequency acoustic propagation in shallow water is examined from a normal mode context. By modelling the far field pressure field as a modal sum, propagating mode characteristics of wavenumber, initial phase, attennation ...
    • Propapation and attenuation characteristics of multilayered media 

      Koch, Stephen Patrick (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979)
      An algorithm is proposed to numerically integrate the inhomogeneous depth-separated wave equation using a state variable technique. The solution obtained for two simple shallow water models is shown to agree well with ...
    • Propulsion in cubomedusae : mechanisms and utility 

      Colin, Sean P.; Costello, John H.; Katija, Kakani; Seymour, Jamie; Kiefer, Kristen (Public Library of Science, 2013-02-20)
      Evolutionary constraints which limit the forces produced during bell contractions of medusae affect the overall medusan morphospace such that jet propulsion is limited to only small medusae. Cubomedusae, which often possess ...