Now showing items 1044-1063 of 1674

    • A pixel to pixel hyperspectral synthetic image model inter-comparison study 

      Bostater, Charles R.; Bassetti, Luce (2006-10-06)
      The purpose of this paper is to present simulation results comparing e a Monte Carlo Hyperspectral Simulation Model (MCHSIM) which generates synthetic images with realistic water wave surface to an iterative layered radiative ...
    • Pixel-registered image fusion 

      Cofer, Rufus H.; Kozaitis, S.P. (1995-07-05)
      One of the highest potential uses of image fusion is that of recognition of critical targets. The continuing image fusion question then is how to make optimal use of the often disparate forms of encountered image detail ...
    • PKS 0736+017: A striking optical flare and intriguing microvariability 

      Clements, Sandra D.; Jenks, A.; Torres, Y. (2003-07)
      The compact, flat-spectrum radio quasar PKS 0736+017 was monitored for microvariability on 10 nights in early 2002 using the 0.9 m SARA telescope on Kitt Peak in Arizona. On January 14, PKS 0736+017 flared dramatically, ...
    • Planet hunters: A transiting circumbinary planet in a quadruple star system 

      Schwamb, Megan E.; Orosz, Jerome A.; Carter, Joshua A.; Welsh, William F.; Fischer, Debra A.; Torres, Guillermo; Howard, Andrew W.; Crepp, Justin R.; Keel, William C.; Lintott, Chris J. (2013-05-10)
      We report the discovery and confirmation of a transiting circumbinary planet (PH1b) around KIC 4862625, an eclipsing binary in the Kepler field. The planet was discovered by volunteers searching the first six Quarters ...
    • Planetary candidates observed by Kepler iv: Planet sample from Q1-Q8 (22 months) 

      Ragozzine, Darin A.; Burke, Christopher J.; Bryson, Stephen T.; Mullally, Fergal R.; Rowe, Jason F.; Christiansen, Jessie L.; Thompson, Susan E.; Coughlin, Jeffrey L.; Haas, Michael R.; Batalha, Natalie M. (2014-01-10)
      We provide updates to the Kepler planet candidate sample based upon nearly two years of high-precision photometry (i.e., Q1-Q8). From an initial list of nearly 13,400 threshold crossing events, 480 new host stars are ...
    • PLANKTONIC FORAMINIFERA COLLECTED BY THE R/V MELVILLE (1972) IN THE SOUTHWEST ATLANTIC 

      Lena, Haydee; Watanabe, Silvia; Souto, Sara (1981)
      The planktonic foraminiferal fauna was studied from 186 samples collected by the R/V Melville in the Southwest Atlantic Ocean during 1972. The samples were collected in the surface layer (horizontal tows) and throughout ...
    • Plant pigment types, distributions, and influences on shallow water submerged aquatic vegetation mapping 

      Hall, Carlton R.; Bostater, Charles R.; Virnstein, Robert W. (2004-11)
      Development of robust protocols for use in mapping shallow water habitats using hyperspectral imagery requires knowledge of absorbing and scattering features present in the environment. These include, but are not limited ...
    • Platforms for hyperspectral imaging, in-situ optical and acoustical imaging in urbanized regions 

      Bostater, Charles R.; Oney, Taylor (2016-09-26)
      Hyperspectral measurements of the water surface of urban coastal waters are presented. Oblique bidirectional reflectance factor imagery was acquired made in a turbid coastal sub estuary of the Indian River Lagoon, Florida ...
    • Polarimetry and the high-energy emission mechanisms in quasar jets: the case of PKS 1136-135 

      Cara, Mihai; Perlman, Eric S.; Uchiyama, Yasunobu; Cheung, Chi C.; Coppi, Paolo S.; Georganopoulos, Markos; Worrall, Diana M.; Birkinshaw, Mark; Sparks, William B.; Marshall, Herman L. (2013-08-20)
      Since the discovery of kiloparsec-scale X-ray emission from quasar jets, the physical processes responsible for their high-energy emission have been poorly defined. A number of mechanisms are under active debate, including ...
    • Polarized mid-infrared synchrotron emission in the core of Cygnus A 

      López Rodríguez, Enrique; Packham, Christopher C.; Tadhunter, Clive N.; Mason, Rachel E.; Perlman, Eric S.; Alonso-Herrero, Almudena; Ramos Almeida, Cristina; Ichikawa, Kohei; Levenson, Nancy A.; Rodríguez-Espinosa, José Miguel (2014-10-01)
      We present high-angular (∼0". 4) resolution mid-infrared (MIR) polarimetric observations in the 8.7μm and 11.6μm filters of Cygnus A using CanariCam on the 10.4 m Gran Telescopio CANARIAS. A highly polarized nucleus ...
    • Pollen-based biome reconstructions for Latin America at 0, 6000 and 18 000 radiocarbon years ago 

      Marchant, Rob A.; Bush, Mark B.; Gosling, William D.; Cleef, Antoine M.; Harrison, Sandy P.; Hooghíemstra, Henry; Markgraf, Vera; Van Boxel, John H.; Ager, Thomas A.; Almeida, Lucia (2009-02-10)
      The biomisation method is used to reconstruct Latin American vegetation at 6000±500 and 18 000±1000 radiocarbon years before present (14C yr BP) from pollen data. Tests using modern pollen data from 381 samples derived ...
    • Poly[aqua(μ-vinylphosphonato)cadmium] 

      Knight, Douglas Andrew; Congiardo, Laura K Byington; Mague, Joel T.; Funk, Aaron R.; Yngard, Ria A. (2011-04)
      The title compound, [Cd(C 2H 3O 3P)(H 2O)] n, was obtained from vinyl-phospho-nic acid and cadmium nitrate. The vinyl groups project into the inter-lamellar space and the structure is held together via van der Waals forces. ...
    • Porous silicon surface feature size estimation using the reflectance spectrum 

      Lowrie, Christopher G.; Earles, S. K.; Pozo de Fernandez, Maria E. (2008-02-13)
      In this paper we excite the surface of porous silicon with incoherent, broad band white light and observe the spectrum of colors reflected from the surface. Using an atomic force microscope images from red and green porous ...
    • A positive solution for singular discrete boundary value problems with sign-changing nonlinearities 

      Lü, Haishen; O’regan, Donal; Agarwal, Ravi P. (2005-03-02)
      This paper presents new existence results for the singular discrete boundary value problem - Δ²u(k - 1) = g(k, u(k)) + λh(k,u(k)), k ∈ [1,T], u(0) = 0 = u(T + 1). In particular, our nonlinearity may be singular in its ...
    • Positive solutions for singular three-point boundary-value problems 

      Agarwal, Ravi P.; O'Regan, Donal; Yan, Baoqiang (2008)
      Using the theory of fixed point index, this paper discusses the existence of at least one positive solution and the existence of multiple positive solutions for the singular three-point boundary value problem: y″(t) + ...
    • Positive solutions of singular complementary Lidstone boundary value problems 

      Agarwal, Ravi P.; O'Regan, Donal; Staněk, Svatoslav (2010-12-02)
      We investigate the existence of positive solutions of singular problem (-1)mx(2m+1) = f(t, x,⋯, x(2m)), x (0) = 0, x(2i-1) (0) = x(2i-1) (T) = 0, 1 ≤ i ≤ m. Here, m ≥ 1 and the Carathéodory function f (t, x0,⋯, x2m) may ...
    • Possible pair-instability supernovae at solar metallicity from magnetic stellar progenitors 

      Georgy, Cyril; Meynet, Georges; Ekström, Sylvia; Wade, Gregg A.; Petit, Véronique; Keszthelyi, Zsolt; Hirschi, Raphael (2017-03-01)
      Near-solar metallicity (and low-redshift) pair-instability supernova (PISN) candidates challenge stellar evolution models. Indeed, at such a metallicity, even an initially very massive star generally loses so much mass by ...
    • Potential impacts of the Deepwater Horizon oil spill on large pelagic fishes 

      Frias-Torres, Sarah; Bostater, Charles R. (2011-10-07)
      Biogeographical analyses provide insights on how the Deepwater Horizon oil spill impacted large pelagic fishes. We georeferenced historical ichthyoplankton surveys and published literature to map the spawning and larval ...
    • Power estimates associated with internal tides from the Monterey Bay Area 

      Jachec, Steven M. (2012)
      Numerical modeling has proven to be a useful method for simulating internal tides within the coastal ocean. Monterey Bay is a location that experiences energetic semidiurnal internal tides, and they are pronounced within ...
    • POWERFUL ACTIVITY in the BRIGHT AGES. I. A VISIBLE/IR SURVEY of HIGH REDSHIFT 3C RADIO GALAXIES and QUASARS 

      Hilbert, Bryan; Chiaberge, Marco; Kotyla, J. P.; Tremblay, Grant R.; Stanghellini, Carlo; Sparks, William B.; Baum, Stefi A.; Capetti, Alessandro; MacChetto, Ferdinando Duccio; Perlman, Eric S. (2016-07)
      We present new rest-frame UV and visible observations of 22 high-z (1 < z < 2.5) 3C radio galaxies and QSOs obtained with the Hubble Space Telescope's Wide Field Camera 3 instrument. Using a custom data reduction strategy ...