Now showing items 2549-2568 of 2948

    • Species composition, habitat, and water quality influence coral bleaching in southern Florida 

      Wagner, Daniel E.; Kramer, Philip A.; van Woesik, Robert (2010-06-03)
      The present study examines coral bleaching along the Florida Keys reef tract (USA) during a major thermal-stress event in the summer of 2005, and during the summers of 2006 and 2007, which were mild thermal stress years. ...
    • Specific absorption and backscatter coefficient signatures in southeastern Atlantic coastal waters 

      Bostater, Charles R. (1998-12-11)
      Measurements of natural water samples in the field and laboratory of hyperspectral signatures of total absorption and reflectance were obtained using long pathlength absorption systems (50 cm pathlength). Water was sampled ...
    • Speckle denoising using wavelet transforms and higher-order statistics 

      Kozaitis, Samuel P.; Ingun, Anurat (2004)
      We reduced speckle noise in SAR imagery by retaining only those wavelet coefficients with significant third-order correlation coefficients. These coefficients were generated from the cross-correlation functions of the image ...
    • Spectra and ratios of identified particles in Au+Au and d+Au collisions at √sNN=200 GeV 

      Adare, Andrew Marshall; Afanasiev, Sergei V.; Aidala, Christine A.; Ajitanand, N. N.; Akiba, Yasuyuki; Al-Bataineh, H.; Alexander, J.; Baksay, Gyöngyi; Baksay, László A.; Hohlmann, Marcus (2013-08-22)
      The transverse momentum (pT) spectra and ratios of identified charged hadrons (π±, K±, p, p̄) produced in √sNN=200 GeV Au+Au and d+Au collisions are reported in five different centrality classes for each collision species. ...
    • Spectral dependence of terrestrial gamma-ray flashes on source distance 

      Hazelton, Bryna J.; Grefenstette, Brian W.; Smith, David M.; Dwyer, Joseph R.; Shao, Xuanmin; Cummer, Steven A.; Chronis, Themis G.; Lay, Erin H.; Holzworth, Robert H. (2009-01-13)
      We use lightning sferics from the World Wide Lightning Location Network to identify storms near 362 Terrestrial Gamma-ray Flashes (TGFs). The combined spectrum of TGFs with storms within 300 km of the sub-satellite point ...
    • Spectral properties of He and heavy ions in ³He-rich solar flares 

      Mason, Glenn M.; Wiedenbeck, Mark E.; Miller, James Anne; Mazur, Joseph E.; Christian, Eric R.; Cohen, Christina M S; Cummings, Alan C.; Dwyer, Joseph R.; Gold, Robert E.; Krimigis, Stamatios M. (2002-08-01)
      Using advanced instrumentation on the ACE spacecraft, we have conducted a survey of solar energetic particle spectra in ³He-rich events over a broad energy range ∼80 keV nucleon-1 to 15 MeV nucleonˉ¹ during the period 1997 ...
    • Spectral properties of heavy ions associated with the passage of interplanetary shocks at 1 AU 

      Desai, Mihir I.; Mason, Glenn M.; Wiedenbeck, Mark E.; Cohen, Christina M S; Mazur, Joseph E.; Dwyer, Joseph R.; Gold, Robert E.; Krimigis, Stamatios M.; Hu, Qiang; Smith, Charles W.; Skoug, Ruth M. (2004-08-20)
      We have surveyed the energy spectra of ∼0.1-100 MeV nucleonˉ¹ C, O, and Fe nuclei associated with the passage of 72 interplanetary (IP) shocks observed on board the ACE spacecraft during the period 1997 October-2002 October. ...
    • Spectral Properties of Lunar Impact Melt Flows 

      Eaton, Charlotte
      The Moon is in synchronous rotation with the Earth. This means that the side we observe is always facing us. That side has a darker region called the mare. The mare is more enriched in iron and is believed to be solidified ...
    • Spectral properties of Titan’s impact craters imply chemical weathering of its surface 

      Neish, Catherine D.; Barnes, Jason W.; Mackenzie, Shannon M.; Soderblom, Jason M.; Le Mouélic, Stéphane P.; Kirk, R.L; Stiles, Bryan Waitsel; Malaska, Michael J.; Le Gall, Alice; Sotin, Christophe (2015-05-28)
      We examined the spectral properties of a selection of Titan's impact craters that represent a range of degradation states. The most degraded craters have rims and ejecta blankets with spectral characteristics that suggest ...
    • SPECTRAL SENSITIVITY OF THE INVASIVE LIONFISH (PTEROIS SPECIES) RETINA AND ITS CAPACITY FOR CHANGE IN RESPONSE TO LIGHTING CONDITION 

      Carroll, Miranda Roseland (2018-05)
      Since their first confirmed sighting in 1985 in the tropical western Atlantic, invasive lionfish of the genus Pterois have had a detrimental impact on marine systems in this region, including significant declines in ...
    • Spectrally sensitive wavelet analysis of multispectral imagery for object detection 

      Kozaitis, S.P.; Olmstead, Ty (1997-08-04)
      We used a 3D wavelet denoising method to reduce noise from multispectral imagery so that small objects may be more readily detected. Our approach exploits the correlation between bands typically present in multispectral ...
    • Spectropolarimetric survey of hydrogen-rich white dwarf stars 

      Kawka, Adéla; Vennes, Stéphane; Schmidt, Gary D.; Wickramasinghe, Dayal T.; Koch, Rolf (2007-01-01)
      We have conducted a survey of 61 southern white dwarfs searching for magnetic fields using Zeeman spectropolarimetry. Our objective is to obtain a magnetic field distribution for these objects and, in particular, to find ...
    • Spectroscopic and photometric analysis of HS 1136+6646: A hot young DAO+K7 V post-common-envelope, pre-cataclysmic variable binary 

      Sing, David; Holberg, Jay B.; Burleigh, Matt R.; Good, Simon A.; Barstow, Martin A.; Oswalt, T.D.; Howell, Steve B.; Brinkworth, Carolyn S.; Rudkin, Mark J.; Johnston, K.; Rafferty, S. (2004-05)
      Extensive photometric and spectroscopic observations have been obtained for HS 1136+6646. The observations reveal a newly formed post–common-envelope binary system containing a hot ~DAO.5 primary and a highly irradiated ...
    • Spectroscopic identification of cool white dwarfs in the solar neighborhood 

      Kawka, Adéla; Vennes, Stéphane (2006-05-20)
      The New Luyten Two-Tenths catalog contains a large number of high proper motion white dwarf candidates that remain to be spectroscopically confirmed. We present new spectroscopic observations, as well as SDSS archival ...
    • Speech Emotion Recognition using Connectionist Models in a Tandem System 

      Najafi, Mary (2018-05)
      This article presents a tandem Speech Emotion Recognition (SER) system by which 8 archetypal emotions can be differentiated based upon two different types of acoustic features as inputs to Artificial Neural Network (ANN) ...
    • Speed Meter 

      Aldhaheri, Ali; Aldhaher, Abdulla; AlSuwaidi, Buti
      The Speed Meter finds out the velocity and acceleration of a moving vehicle using the GPS coordinates. The location coordinates are used to calculate the velocity and acceleration using predefined formulae. The results ...
    • SPH Simulations of Direct Impact Accretion in the Ultracompact AM CVn Binaries 

      Dolence, Joshua; Wood, Matt A.; Silver, Isaac M. (2008-08-10)
      The ultracompact binary systems V407 Vul (RX J1914.4+2456) and HM Cnc (RX J0806.3+1527), a two-member subclass of the AM CVn stars, continue to generate interest because they defy unambiguous classification. Three proposed ...
    • SPIRITUALITY AS A HUMAN RESOURCE ATTRIBUTE TO FACILITATE EMPLOYEE ENGAGEMENT AND RETENTION 

      Sumner, Wesley Dale (2018-05)
      Spirituality as an important component of American workplace success is a phenomenon only better understood during the past two decades. Until now, little research has been done to understand workplace spirituality in ...
    • Spitzer mid-infrared spectroscopy of compact symmetric objects: What powers radio-loud active galactic nuclei? 

      Willett, Kyle W.; Stocke, John T.; Darling, Jeremy K.; Perlman, Eric S. (2010-04-05)
      We present low- and high-resolution mid-infrared (mid-IR) spectra and photometry for eight compact symmetric objects (CSOs) taken with the Infrared Spectrograph on the Spitzer Space Telescope. The hosts of these young, ...
    • Spitzer space telescope measurements of dust reverberation lags in the Seyfert 1 galaxy NGC 6418 

      Vazquez, Billy; Galianni, Pasquale; Richmond, Michael W.; Robinson, Andrew Edward; Axon, David J.; Hörne, Keith D.; Almeyda, Triana; Fausnaugh, Michael M.; Peterson, Bradley M.; Batcheldor, Dan (2015-03-10)
      We present results from a 15 month campaign of high-cadence (∼3 days) mid-infrared Spitzer and optical (B and V) monitoring of the Seyfert 1 galaxy NGC 6418, with the objective of determining the characteristic size of the ...