Browsing by Title

Now showing items 2482-2496 of 2496

    • X-ray bursts associated with leader steps in cloud-to-ground lightning 

      Dwyer, Joseph R.; Rassoul, Hamid K.; Dayeh, M. A.; Caraway, Lee; Chrest, A.; Wright, Brian F.; Kozak, E.; Jerauld, J.; Uman, Martin A.; Rakov, V. (2005-01-04)
      X-ray and electric field measurements were made during five nearby negative natural lightning strikes in north central Florida during the summer of 2004. The observed X-ray emission typically was detected ∼1 ms before the ...

    • X-ray bursts produced by laboratory sparks in air 

      Dwyer, Joseph R.; Rassoul, Hamid K.; Saleh, Ziad H.; Uman, Martin A.; Jerauld, J.; Plumer, J. Anderson (2005-10-22)
      X-ray observations were made during fourteen 1.5 to 2.0 m high-voltage discharges in air produced by a 1.5 MV Marx circuit. All 14 discharges generated x-rays in the ∼30 to 150 keV range. The x-rays, which arrived in ...

    • X-ray emission from magnetic massive stars 

      Nazé, Yaël; Petit, Véronique; Rinbrand, Melanie; Cohen, David H.; Owocki, Stanley P.; Ud-Doula, Asif; Wade, Gregg A. (2014-10-30)
      Magnetically confined winds of early-type stars are expected to be sources of bright and hard X-rays. To clarify the systematics of the observed X-ray properties, we have analyzed a large series of Chandra and XMM-Newton ...

    • An X-ray imaging survey of quasar jets: Testing the inverse Compton model 

      Marshall, Herman L.; Gelbord, Jonathan M.; Schwartz, Daniel A.; Murphey, David W.; Lovell, James E. J.; Worrall, Diana M.; Birkinshaw, Mark; Perlman, Eric S.; Godfrey, Leith E. H.; Jauncey, David L. (2011-03-01)
      We present results from continued Chandra X-ray imaging and spectroscopy of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like extended structure. X-rays are detected from 24 of the 39 jets observed ...

    • An X-Ray Imaging Survey of Quasar Jets: The Complete Survey 

      Marshall, Herman L.; Gelbord, Jonathan M.; Worrall, Diana M.; Birkinshaw, Mark; Schwartz, Daniel A.; Jauncey, David L.; Griffiths, G.; Murphy, David W.; Lovell, James E.J.; Perlman, Eric S. (2018-03-20)
      We present Chandra X-ray imaging of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like structure. X-rays are detected from 59% of 56 jets. No counter-jets were detected. The core spectra are fitted ...

    • X-ray nuclear activity in S4G barred galaxies: no link between bar strength and co-occurrent supermassive black hole fueling 

      Cisternas, Mauricio; Gadotti, Dimitri A.; Knapen, Johan H.; Kim, Taehyun; Díaz-García, Simón; Laurikainen, Eija; Salo, Heikki; González-Martín, Omaira; Ho, Luis C.; Mizusawa, Trisha (2013-10-10)
      Stellar bars can lead to gas inflow toward the center of a galaxy and stimulate nuclear star formation. However, there is no compelling evidence on whether they also feed a central supermassive black hole: by measuring the ...

    • X-rays from Magnetic B-type Stars 

      Fletcher, Corinne (2018-07)
      Recent surveys have found that ∼10% of massive stars host strong, mostly dipolar magnetic fields with strengths on the order of a kilogauss. The prominent idea describing the interaction between the stellar winds and the ...

    • Zero Emissions Sulphur Recovery Production 

      Alqattan, Ahmad; Alshatti, Naser; Alajmi, Qahsan; Alajmi, Fahad
      A designed process for the concurrent production of hydrogen and Sulphur from a H2S containing gas stream (acid gas) with zero emissions. The method uses catalytic oxidative cracking, COC, of H2S to form H2 and S2. In ...

    • Zero-knowledge proofs for mix-nets of secret shares 

      Silaghi, Marius Cӑlin (2005-03-07)
      Mix-nets can be used to shuffle vectors of shared secrets. This operation can be an important building block for solving combinatorial problems where constraints are secret to different participants. A main contribution ...

    • ZnO nanorod-smectic liquid crystal composites: Role of ZnO particle size, shape, and concentration on liquid crystal order and current-voltage properties 

      Branch, J.; Thompson, Raymond G.; Taylor, Jefferson W.; Salamanca-Riba, Lourdes G.; Martínez-Miranda, Luz J. (2014-04-30)
      This paper investigates how changing the ZnO nanorod size and concentration in a smectic liquid crystal affect the order of the liquid crystal and the current-voltage (I-V) curves in these ZnO nanorods - octylcyanobiphenyl ...

    • δ Sct-type pulsations in eclipsing binary systems: Y Cam 

      Wood, Matt A.; Rodríguez, Eloy; García, Juan Mario; Costa, Víctor M.; Lampens, Patricia; Van Cauteren, Paul; Mkrtichian, David E.; Olson, Edward C.; Amado, Pedro J.; Daszyńska-Daszkiewicz, Jadwiga (2010)
      We present the results of a three-continent multisite photometric campaign carried out on the Algol-type eclipsing binary system Y Cam, in which the primary component is a multiperiodic δ Sct-type pulsator. The observations ...

    • The δ Scuti star FG Virginis II. A search for high pulsation frequencies 

      Breger, Michel; Handler, Gerald; Serkowitsch, E.; Reegen, Piet; Provençal, Judith L.; Wood, Matt A.; Clemens, J. Christopher; O'Brien, Marlea Sean; Winget, Don Earl; Nather, R. Edward (1996-05)
      Although the δ Scuti and roAp variables occupy similar positions on and near the main sequence, δ Scuti variables pulsate with lower radial and nonradial overtones and lower frequencies. To test whether high frequencies ...

    • Υ(1S+2S+3S) production in d+Au and p+p collisions at √s NN=200 GeV and cold-nuclear-matter effects 

      Adare, Andrew Marshall; Afanasiev, Sergei V.; Aidala, C.; Ajitanand, N. N.; Akiba, Yasuyuki; Akimoto, R.; Baksay, Gyöngyi; Baksay, Laszlo; Hohlmann, Marcus; Rembeczki, S. (2013-04-25)
      The three Υ states, Υ(1S+2S+3S), are measured in d+Au and p+p collisions at √sNN=200 GeV and rapidities 1.2<|y|<2.2 by the PHENIX experiment at the Relativistic Heavy Ion Collider. Cross sections for the inclusive Υ(1S+2S+3S) ...

    • φ meson production in d + Au collisions at √sNN =200 GeV 

      Adare, Andrew Marshall; Aidala, Christine A.; Ajitanand, N. N.; Akiba, Yasuyuki; Al-Bataineh, H.; Alexander, John M.; Baksay, Gyöngyi; Baksay, László A.; Hohlmann, Marcus; Rembeczki, S. (2015-10-19)
      The PHENIX Collaboration has measured φ meson production in d+Au collisions at √sNN=200 GeV using the dimuon and dielectron decay channels. The φ meson is measured in the forward (backward) d-going (Au-going) direction, ...

    • ϒ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV 

      Khachatryan, V.; Tumasyan, A.; Sirunyan, A.M.; Baarmand, M.M.; Noonan, D.; Colafranceschi, Stefano; Bhopatkar, Vallary; Hohlmann, Marcus; Roy, Tuhin S.; Yumiceva, Francisco X. (2016-10-10)
      The polarizations of the ϒ(1S), ϒ(2S), and ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample ...