Now showing items 5248-5267 of 8210

    • Obelin mutants as reporters in bioluminescent dual-analyte binding assay 

      Krasitskaya, Vasilisa V.; Kudryavtsev, Alexander N.; Shimomura, Osamu; Frank, Ludmila A. (RSC Publishing, 2012-11-29)
      Two obelin mutants distinctly different in the color of bioluminescence were successfully applied to simultaneous detection of two analytes in a single well. The flash-type signals were triggered by single injection of ...
    • The obese gut microbiome across the epidemiologic transition 

      Dugas, Lara R.; Fuller, Miles; Gilbert, Jack A.; Layden, Brian T. (BioMed Central, 2016-01-11)
      The obesity epidemic has emerged over the past few decades and is thought to be a result of both genetic and environmental factors. A newly identified factor, the gut microbiota, which is a bacterial ecosystem residing ...
    • Objective indicators of pasture degradation from spectral mixture analysis of Landsat imagery 

      Davidson, Eric A.; Asner, Gregory P.; Stone, Thomas A.; Neill, Christopher; Figueiredo, Ricardo O. (American Geophysical Union, 2008-07-23)
      Degradation of cattle pastures is a management concern that influences future land use in Amazonia. However, “degradation” is poorly defined and has different meanings for ranchers, ecologists, and policy makers. Here we ...
    • Objectively analyzed air-sea heat fluxes for the global ice-free oceans (1981-2005) 

      Yu, Lisan; Weller, Robert A. (American Meteorological Society, 2007-04)
      A 25-yr (1981–2005) time series of daily latent and sensible heat fluxes over the global ice-free oceans has been produced by synthesizing surface meteorology obtained from satellite remote sensing and atmospheric model ...
    • The oblique seismic experiment in oceanic crust 

      Stephen, Ralph A. (1978-05)
      The Oblique Seismic Experiment (OSE} is proposed to increase the usefulness of the IPOD crustal borehole as a means of investigating layer 2 of oceanic crust. Specific objectives are: to determine the lateral. extent ...
    • Obliquity pacing of the late Pleistocene glacial terminations 

      Huybers, Peter; Wunsch, Carl (2005-01-24)
      The timing of glacial/interglacial cycles at intervals of about 100,000 yr (100 kyr) is commonly attributed to control by Earth orbital configuration variations. This “pacemaker” hypothesis has inspired many models, variously ...
    • Obliquity-driven expansion of North Atlantic sea ice during the last glacial 

      Turney, Chris S. M.; Thomas, Zoe A.; Hutchinson, David K.; Bradshaw, Corey J. A.; Brook, Barry W.; England, Matthew H.; Fogwill, Christopher J.; Jones, Richard T.; Palmer, Jonathan; Hughen, Konrad A.; Cooper, Alan (John Wiley & Sons, 2015-12-10)
      North Atlantic late Pleistocene climate (60,000 to 11,650 years ago) was characterized by abrupt and extreme millennial duration oscillations known as Dansgaard-Oeschger (D-O) events. However, during the Last Glacial Maximum ...
    • OBSANP data acquisition system : operator's manual and system overview 

      McPeak, Sean P.; D'Spain, Gerald L.; Stephen, Ralph A.; von der Heydt, Keith; Worcester, Peter F. (Woods Hole Oceanographic Institution, 2013-10)
      On the Ocean Bottom Seismometer Augmentation in the North Pacific Experiment (OBSANP, June-July, 2013, R/V Melville), a VLA and twelve OBSs were deployed to listen to an active acoustic source, a J15-3. This report ...
    • OBSAPS data acquisition system : operator's manual and system overview 

      McPeak, Sean P.; D'Spain, Gerald L.; Stephen, Ralph A. (Woods Hole Oceanographic Institution, 2011-05)
      On the Ocean Bottom Seismometer Augmentation to the Philippine Sea Experiment (OBSAPS, April-May, 2011, R/V Revelle), a VLA and six OBSs were deployed to listen to an active acoustic source, a J15-3. This report describes ...
    • Observation and inversion of seismo-acoustic waves in a complex Artic ice environment 

      Miller, Bruce E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-09)
      The propagation of low frequency seismo-acoustic waves in the Arctic Ocean ice canopy is examined through the analysis of hydrophone and geophone data sets collected in 1987 at an ice camp designated PRUDEX in the Beaufort ...
    • Observation of near-inertial wave reflections within the thermostad layer of an anticyclonic mesoscale eddy 

      Byun, Sang-Shin; Park, Jong Jin; Chang, Kyung-Il; Schmitt, Raymond W. (American Geophysical Union, 2010-01-15)
      Moored current observations in the southwestern East/Japan Sea of 16.5 months duration clearly captured two episodes of downward phase propagation (upward energy propagation) of near-inertial waves (NIWs). Time series of ...
    • Observation of very large and steep internal waves of elevation near the Massachusetts coast 

      Scotti, Alberto; Pineda, Jesus (American Geophysical Union, 2004-11-25)
      We report on near-bottom waves of elevation with amplitude nearly half the 25 m water column, very steep, and propagating into a sheared turbulent wave-guide. The waves contained trapped cores transporting parcels of water ...
    • Observational and model studies of the circulation in the Gulf of Tonkin, South China Sea 

      Ding, Yang; Chen, Changsheng; Beardsley, Robert C.; Bao, Xianwen; Shi, Maochong; Zhang, Yu; Lai, Zhigang; Li, Ruixiang; Lin, Huichan; Viet, Nguyen Trung (John Wiley & Sons, 2013-12-03)
      Moored current measurements were made at one mooring site in the northern Gulf of Tonkin for about 1 year during 1988–1989. Analyses were performed to examine characteristics and variability of tidal and subtidal flows. ...
    • Observational and theoretical studies of the dynamics of mantle plume–mid-ocean ridge interaction 

      Ito, Garrett T.; Lin, Jian; Graham, David W. (American Geophysical Union, 2003-11-20)
      Hot spot–mid-ocean ridge interactions cause many of the largest structural and chemical anomalies in Earth's ocean basins. Correlated geophysical and geochemical anomalies are widely explained by mantle plumes that deliver ...
    • Observational studies of the air flow over Nantucket Island during the summer of 1950 

      Malkus, Joanne Starr; Bunker, Andrew F. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1952-10)
      The observations presented here were undertaken as a continuation of a broader program to investigate atmospheric convection. One phase of this study concerns the relation between convective motions, their energy ...
    • Observationally constrained modeling of sound in curved ocean internal waves: Examination of deep ducting and surface ducting at short range 

      Duda, Timothy F.; Lin, Ying-Tsong; Reeder, D. Benjamin (Acoustical Society of America, 2011-09)
      A study of 400 Hz sound focusing and ducting effects in a packet of curved nonlinear internal waves in shallow water is presented. Sound propagation roughly along the crests of the waves is simulated with a three-dimensional ...
    • Observations and a model of the mean circulation over the Middle Atlantic Bight continental shelf 

      Lentz, Steven J. (American Meteorological Society, 2008-06)
      Analyses of current time series longer than 200 days from 33 sites over the Middle Atlantic Bight continental shelf reveal a consistent mean circulation pattern. The mean depth-averaged flow is equatorward, alongshelf, and ...
    • Observations and a model of undertow over the inner continental shelf 

      Lentz, Steven J.; Fewings, Melanie R.; Howd, Peter A.; Fredericks, Janet J.; Hathaway, Kent (American Meteorological Society, 2008-11)
      Onshore volume transport (Stokes drift) due to surface gravity waves propagating toward the beach can result in a compensating Eulerian offshore flow in the surf zone referred to as undertow. Observed offshore flows indicate ...
    • Observations and model simulations of wave-current interaction on the inner shelf 

      Hopkins, Julia; Elgar, Steve; Raubenheimer, Britt (John Wiley & Sons, 2016-01-10)
      Wave directions and mean currents observed for two 1 month long periods in 7 and 2 m water depths along 11 km of the southern shoreline of Martha's Vineyard, MA, have strong tidal modulations. Wave directions are modulated ...
    • Observations and modeling of sand transport in a wave dominated environment 

      Traykovski, Peter A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-05)
      Observations of bedforms, suspended sediment and water velocities were used to examine sediment transport processes at the sandy LE0-15 site located off the New Jersey coast. The bedforms were observed during storms using ...