Now showing items 483-502 of 1673

    • H.264 scalable video over finite-state Markov chain wireless channels 

      Hua, Guogang; Song, Daewon; Hench, David L.; Chen, Chang Wen (2007-09-10)
      In this paper, a wireless channel is viewed as a heterogeneous network in the time domain, and an adaptive video transmission scheme for H.264 scalable video over wireless channels modeled as a finite-state Markov chain ...
    • A half Dl MPEG-4 encoder on the BSP-15 DSP 

      Chen, Lulin; He, Zhihai; Chen, Chang Wen; Isnardi, Michael A. (2004-01-18)
      In this paper, we present the work on implementation of a half-Dl interlaced MPEG-4 encoder with Equator Technology DSP chip, BSP-15. The BSP-15 DSP consists mainly of a VLIW core, Co-processors, and media I/O interfaces. ...
    • Hamiltonian formulation of induced gravity in two dimensions 

      Torre, Charles G. (1989-10-15)
      A Hamiltonian formulation of the theory of induced gravity in two dimensions is constructed. This formulation differs from previous efforts in that the formalism is covariant under all relevant transformation groups. In ...
    • HD 164492C: A rapidly rotating, Hα-bright, magnetic early B star associated with a 12.5 d spectroscopic binary 

      Wade, Gregg A.; Shultz, Matthew E.; Sikora, J.; Bernier, M.E.; Rivinius, Th H.; Alécian, Evelyne; Petit, Véronique; Grunhut, Jason H.; The BinaMIcS Collaboration (2016-10-21)
      We employ high-resolution spectroscopy and spectropolarimetry to derive the physical properties and magnetic characteristics of the multiple systemHD164492C, located in the young open cluster M20. The spectrum reveals ...
    • The heavily polluted atmosphere of the DAZ white dwarf GALEX J193156.8+011745 

      Vennes, Stephane; Kawka, Adéla; Németh, Péter (2010-05-01)
      We report on the discovery of a new heavily polluted white dwarf. The DAZ white dwarf GALEX J193156.8+011745 was identified in a joint Galaxy Evolution Explorer (GALEX)/GSC survey of ultraviolet-excess objects. Optical ...
    • Heavy-flavor electron-muon correlations in p+p and d+Au collisions at sNN =200 GeV 

      Hohlmann, Marcus; Rembeczki, S.; Baksay, Gyöngyi; Baksay, László A; Adare, Andrew Marshall; Afanasiev, Sergei V.; Aidala, Christine A.; Ajitanand, N. N.; Akiba, Yasuyuki; Al-Bataineh, H. (2014-03-31)
      Background: Heavy-flavor modification in relativistic p(d)+A collisions are sensitive to different kinds of strong-interaction physics ranging from modifications of the nuclear wave function to initial- and final-state ...
    • Heavy-ion elemental abundances in large solar energetic particle events and their implications for the seed population 

      Desai, Mihir I.; Mason, Glenn M.; Gold, Robert E.; Krimigis, Stamatios M.; Cohen, Christina M S; Mewaldt, Richard A.; Mazur, Joseph E.; Dwyer, Joseph R. (2006-09-20)
      We have surveyed the ∼0.1-10 MeV nucleonˉ¹ abundances of heavy ions from ³He through Fe in 64 large solar energetic particle (LSEP) events observed on board the Advanced Composition Explorer from 1997 November through 2005 ...
    • Heavy-quark production in p + p and energy loss and flow of heavy quarks in Au + Au collisions at √sNN=200 GeV 

      Baksay, László A; Baksay, Gyöngyi; Dehmelt, Klaus; Hohlmann, Marcus; Rembeczki, Szabolcs; Adare, Andrew Marshall; Afanasiev, Sergei V.; Aidala, Christine A.; Ajitanand, N. N.; Akiba, Yasuyuki (2011-10-10)
      Transverse momentum spectra of electrons (pTe) from semileptonic weak decays of heavy-flavor mesons in the range of 0.3<pTe<9.0 GeV/c have been measured at midrapidity (|y|<0.35) by the PHENIX experiment at the Relativistic ...
    • The Heliosphere as Seen in TeV Cosmic Rays 

      Zhang, Ming; Pogorelov, Nikolai V. (2016)
      Measurements from several cosmic-ray air shower experiments reveal that the anisotropy of TeV cosmic-ray flux does not agree with a dipole pattern commonly expected from the Compton-Getting effect or from the diffusion of ...
    • Heliospheric influence on the anisotropy of TeV cosmic rays 

      Zhang, Ming; Zuo, Pingbing; Pogorelov, Nikolai V. (2014-06-26)
      This paper provides a theory of using Liouville's theorem to map the anisotropy of TeV cosmic rays seen at Earth using the particle distribution function in the local interstellar medium (LISM). The ultimate source of ...
    • THE HELIOTAIL 

      Pogorelov, Nikolai V.; Borovikov, Sergey N.; Heerikhuisen, Jacob; Zhang, Ming (2015-10-06)
      The heliotail is formed when the solar wind (SW) interacts with the local interstellar medium (LISM) and is shaped by the interstellar magnetic field (ISMF). While there are no spacecraft available to perform in situ ...
    • Heterogeneous photocatalytic reduction of ferrate(VI) in UV-irradiated titania suspensions: Role in enhancing destruction of nitrogen-containing pollutants. 

      Sharma, V.K.; Winkelmann, K.; Krasnova, Y.; Lee, C.; Sohn, M. (2003)
      The results of the heterogeneous photocatalytic reduction of Fe(VI) in UV-irradiated TiO2 suspensions are presented and suggest indirect observation of the formation of Fe(V) by the photoreduction of Fe(VI) with ecb- at ...
    • HgCdTe focal plane array cost modeling 

      Sanders, Thomas J.; Hess, Glenn T. (2003-10-10)
      Focal plane arrays (FPAs) are used in many applications for detecting infrared (IR) radiation where normal sight with light in the visible spectrum is not possible. To effectively detect this IR radiation, complex semiconductor ...
    • High order derivative spectroscopy for selecting spectral regions and channels for remote sensing algorithm development 

      Bostater, Charles R. (1999-12-17)
      A remote sensing reflectance model, which describes the transfer of irradiant light within a plant canopy or water column has previously been used to simulate the nadir viewing reflectance of vegetation canopies and leaves ...
    • High pT direct photon and π0 triggered azimuthal jet correlations and measurement of kT for isolated direct photons in p+p collisions at √s=200GeV 

      Adare, Andrew Marshall; Afanasiev, Sergei V.; Aidala, Christine A.; Ajitanand, N. N.; Akiba, Yasuyuki; Baksay, Gyöngyi; Baksay, László A; Dehmelt, Klaus; Hohlmann, Marcus; Rembeczki, Szabolcs (2010-10-04)
      Correlations of charged hadrons of 1<pT<10Gev/c with high pT direct photons and π0 mesons in the range 5<p T<15Gev/c are used to study jet fragmentation in the γ+jet and dijet channels, respectively. The magnitude of the ...
    • High-altitude electrical discharges associated with thunderstorms and lightning 

      Liu, Ningyu; McHarg, Matthew G.; Stenbaek-Nielsen, Hans C. (2015-12-01)
      The purpose of this paper is to introduce electrical discharge phenomena known as transient luminous events above thunderstorms to the lightning protection community. Transient luminous events include the upward electrical ...
    • High-energy electron beams launched into space by thunderstorms 

      Dwyer, Joseph R.; Grefenstette, Brian W.; Smith, David M. (2008-01-31)
      Using CGRO/BATSE data, a possible new source of high-energy electrons and positrons in the earth's inner magnetosphere is presented. These particles are generated within the upper atmosphere by Compton scattering and ...
    • High-speed X-ray images of triggered lightning dart leaders 

      Dwyer, Joseph R.; Schaal, M. M.; Rassoul, Hamid K.; Uman, Martin A.; Jordan, Douglas M.; Hill, Dustin (2011-10-26)
      We present the first high-time resolution two-dimensional images of X-ray emissions from lightning. The images were recorded at a rate of 10 million per second using a new pinhole-type camera, located 44 m from rocket-and-wire- ...
    • HOLOCENE EVOLUTION OF INDIAN RIVER LAGOON IN CENTRAL BREVARD COUNTY, FLORIDA 

      Bader, Sharon F.; Parkinson, Randall W. (1990)
      This study examined the coastal response of central Brevard County to rising Holocene sea level as it has been recorded in sediments of Indian River lagoon. The typical Holocene sediment sequence, in ascending order, ...
    • The horizontal electric field induced by a lightning return stroke 

      Meredith, Scott L.; Earles, Susan K.; Turner, Niescja E. (2010)
      Problem statement: Develop a new formula which describes the horizontal electric field induced by a lightning return stroke in contact with an imperfect conductive surface. Approach: A new method for describing the horizontal ...