Now showing items 4878-4897 of 7061

  • Particle transport in horizontal convection : implications for the "Sandström theorem" 

    Marchal, Olivier (2006-04-25)
    The 'Sandström theorem' as interpreted by Jeffreys (1925) is that in a flow maintained by a temperature difference, the pathline from the cold region to the warm region must lie below the return path. A formal demonstration ...
  • Particulate matter sinking to the deep-sea floor at 2000 M in the Tongue of the Ocean, Bahamas, with a description of a new sedimentation trap 

    Wiebe, Peter H.; Boyd, Steven H.; Winget, Clifford L. (Woods Hole Oceanographic Institution, 1976-09)
    A sedimentation trap for use just above the deep-sea floor was free-fallen to a depth of 2050 m in the Tongue of the Ocean canyon on January 3, 1974. On March 6, it was successfully recovered with the assistance of ...
  • Partitioning of sediment on the shelf offshore of the Columbia River littoral cell 

    Twichell, David C.; Cross, VeeAnn A.; Peterson, Curt D. (Elsevier B.V., 2010-02-11)
    Sediment derived from the Columbia River has been deposited on the continental shelf, along the barriers and beaches, and in the bays of the Oregon and Washington coast during the Holocene. The barrier and beach deposits ...
  • Partitioning of strontium between calcite and fluid 

    Gabitov, R. I.; Watson, E. B. (American Geophysical Union, 2006-11-07)
    The Sr/Ca ratio of biogenic carbonate is widely used as a proxy for paleotemperature. This application is supported by empirical calibrations of Sr/Ca as a function of temperature, but it is also known that Sr uptake in ...
  • The passage of the bomb radiocarbon pulse into the Pacific Ocean 

    Jenkins, William J.; Elder, Kathryn L.; McNichol, Ann P.; von Reden, Karl F. (Dept. of Geosciences, University of Arizona, 2010-08)
    We report and compare radiocarbon observations made on 2 meridional oceanographic sections along 150°W in the South Pacific in 1991 and 2005. The distributions reflect the progressive penetration of nuclear weapons-produced ...
  • Passive acoustic detection of deep-diving beaked whales 

    Zimmer, Walter M. X.; Harwood, John; Tyack, Peter L.; Johnson, Mark P.; Madsen, Peter T. (Acoustical Society of America, 2008-11)
    Beaked whales can remain submerged for an hour or more and are difficult to sight when they come to the surface to breathe. Passive acoustic detection (PAD) not only complements traditional visual-based methods for detecting ...
  • A passive capture latch for ODYSSEY-class AUVs 

    Bowen, Martin F. (Woods Hole Oceanographic Institution, 1998-06-12)
    Under subcontract to the Massachusetts Institute of Techology's (MIT) Sea Grant Autonomous Ocean Sampling Network (AOSN) program, the Woods Hole Oceanographic Institution's Deep Submergence Laboratory (WHOI-DSL) produced ...
  • Passive energy recapture in jellyfish contributes to propulsive advantage over other metazoans 

    Gemmell, Brad J.; Costello, John H.; Colin, Sean P.; Stewart, Colin J.; Dabiri, John O.; Tafti, Danesh; Priya, Shashank (2013-08)
    Gelatinous zooplankton populations are well known for their ability to take over perturbed ecosystems. The ability of these animals to outcompete and functionally replace fish that exhibit an effective visual predatory ...
  • Passive localization of underwater acoustic beacons 

    Wojcik, Dennis M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-09)
    This thesis examines the use of a single, omnidirectional hydrophone as a receiving sensor to passively localize an acoustic beacon. The localization problem is presented as a constrained, nonlinear parameter estimation ...
  • Passive time reversal acoustic communications through shallow-water internal waves 

    Song, Aijun; Badiey, Mohsen; Newhall, Arthur E.; Lynch, James F.; DeFerrari, Harry A.; Katsnelson, Boris G. (IEEE, 2010-11-30)
    During a 12-h period in the 2006 Shallow Water Experiment (SW06), binary phase shift keying (BPSK) signals at the carrier frequencies of 813 and 1627 Hz were propagated over a 19.8-km source–receiver range when a packet ...
  • Passive wake detection using seal whisker-inspired sensing 

    Beem, Heather R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-02)
    This thesis is motivated by biological experiments, which display the harbor seal's ability to track the wake of an object several seconds after it swam by. In this work, I elucidate the basic fluid mechanisms that seals ...
  • Past, present, and future roles of long-term experiments in the LTER Network 

    Knapp, Alan K.; Smith, Melinda D.; Hobbie, Sarah E.; Collins, Scott L.; Fahey, Timothy J.; Hansen, Gretchen J. A.; Landis, Douglas A.; La Pierre, Kimberly J.; Melillo, Jerry M.; Seastedt, Timothy R.; Shaver, Gaius R.; Webster, Jackson R. (American Institute of Biological Sciences, 2012-04)
    The US National Science Foundation—funded Long Term Ecological Research (LTER) Network supports a large (around 240) and diverse portfolio of long-term ecological experiments. Collectively, these long-term experiments have ...
  • Pathogenic forms of tau inhibit kinesin-dependent axonal transport through a mechanism involving activation of axonal phosphotransferases 

    Kanaan, Nicholas M.; Morfini, Gerardo A.; LaPointe, Nichole E.; Pigino, Gustavo F.; Patterson, Kristina R.; Song, Yuyu; Andreadis, Athena; Fu, Yifan; Brady, Scott T.; Binder, Lester I. (Society for Neuroscience, 2011-07-06)
    Aggregated filamentous forms of hyperphosphorylated tau (a microtubule-associated protein) represent pathological hallmarks of Alzheimer's disease (AD) and other tauopathies. While axonal transport dysfunction is thought ...
  • Pathogenic huntingtin inhibits fast axonal transport by activating JNK3 and phosphorylating kinesin 

    Morfini, Gerardo A.; You, Yi-Mei; Pollema, Sarah L.; Kaminska, Agnieszka; Liu, Katherine; Yoshioka, Katsuji; Bjorkblom, Benny; Coffey, Eleanor T.; Bagnato, Carolina; Han, David; Huang, Chun-Fang; Banker, Gary; Pigino, Gustavo F.; Brady, Scott T. (2009-04-28)
    Selected vulnerability of neurons in Huntington’s disease (HD) suggests alterations in a cellular process particularly critical for neuronal function. Supporting this idea, pathogenic Htt (polyQ-Htt) inhibits fast axonal ...
  • The pathway of carbon in nature 

    Hayes, John M. (2006-05-03)
    A “Perspective” for Science, introducing the paper "Biomarker Evidence for a Major Preservation Pathway of Sedimentary Organic Carbon," by Y. Hebting, P. Schaeffer, A. Behrens, P. Adam, G. Schmitt, P. Schneckenburger, ...
  • Pathways of carbon and energy metabolism of the epibiotic community associated with the deep-sea hydrothermal vent shrimp Rimicaris exoculata 

    Hugler, Michael; Petersen, Jillian M.; Dubilier, Nicole; Imhoff, Johannes F.; Sievert, Stefan M. (Public Library of Science, 2011-01-07)
    The shrimp Rimicaris exoculata dominates the faunal biomass at many deep-sea hydrothermal vent sites at the Mid-Atlantic Ridge. In its enlarged gill chamber it harbors a specialized epibiotic bacterial community for which ...
  • Pathways of Pacific water across the Chukchi Sea : a numerical model study 

    Winsor, Peter; Chapman, David C. (American Geophysical Union, 2004-03-02)
    Pathways of Pacific Water flowing from the North Pacific Ocean through Bering Strait and across the Chukchi Sea are investigated using a two-dimensional barotropic model. In the no-wind case, the flow is driven only by a ...
  • Pathways of shelf water export from the Hatteras shelf and slope 

    Churchill, James H.; Gawarkiewicz, Glen G. (American Geophysical Union, 2012-08-21)
    It has long been recognized that a massive flow of Middle Atlantic Bight (MAB) shelf water is exported to the deep ocean in the region near Cape Hatteras, North Carolina. We examine the details of this export using data ...
  • Patron driven acquisitions: or I wish I knew then ... 

    Avery, Beth Fuseler; Harker, Karen (IAMSLIC, 2013)