Now showing items 2587-2606 of 4248

    • Obliquely propagating electromagnetic waves in magnetized kappa plasmas 

      Gaelzer, Rudi; Ziebell, Luiz Fernando (2016) [Journal article]
      Velocity distribution functions (VDFs) that exhibit a power-law dependence on the high-energy tail have been the subject of intense research by the plasma physics community. Such functions, known as kappa or superthermal ...
    • Observational limits on companions to g29-38 

      Kleinman, Scot James; Nather, R. Edward; Winget, Donald Earl; Clemens, J. Christopher; Bradley, Paul A.; Kanaan Neto, Antonio Nemer; Provencal, Judith L.; Claver, C.F.; Watson, Todd K.; Yanagida, K.; Dixson, James S.; Wood, Matthew A.; Sullivan, Denis J.; Meistas, Edmundas G.; Leibowitz, Elia M.; Moskalik, Pawel; Zola, Staszek; Pajdosz, Y.; Krzesinski, Jerzy; Solheim, Jan-Eric; Bruvold, A.; O'Donoghue, Darragh; Katz, M.; Vauclair, Gérard; Dolez, Noël; Chevreton, Michel; Barstow, Martin A.; Kepler, Souza Oliveira; Giovannini Junior, Odilon; Hansen, Carl J.; Kawaler, Steven D. (1994) [Journal article]
      Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has ...
    • Observation of collective inner-shell effects for protons backscattered from the Al(110) surface 

      Grande, Pedro Luis; Silva Junior, Agenor Hentz da; Schiwietz, Gregor; Starodub, D.; Garfunkel, E.; Gustafsson, T. (2005) [Journal article]
      The surface peak of 98-keV protons backscattered from a clean Al (110) surface has been studied in detail for three different scattering geometries. The corresponding energy-loss distributions are asymmetric due to the ...
    • Observation of deterministic chaos in electrical discharges in gases 

      Braun, Thomas; Lisboa, Jorge Amoretti; Francke Sandoval, Ricardo Eugenio; Gallas, Jason Alfredo Carlson (1987) [Journal article]
      We report that dc-excited discharges in gases display current oscillations which develop into deterministically chaotic behavior. A period-doubling route to chaos characteristic of 1D maps is established for sealed discharges ...
    • Observation of Higgs boson decay to bottom quarks 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2018) [Journal article]
      The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z ...
    • Observation of medium-induced modifications of jet fragmentation in Pb-Pb collisions at √sNN=5.02 TeV using isolated photon-tagged jets 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2018) [Journal article]
      Measurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and Pb-Pb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a ...
    • Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2020) [Journal article]
      The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √snn = 8.16 TeV. Measurements are performed in the W± → μ±vμ channel using a data sample corresponding ...
    • Observation of prompt J/ψ meson elliptic flow in high-multiplicity pPb collisions at √sNN = 8.16 TeV 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2019) [Journal article]
      A measurement of the elliptic flow (v2) of prompt J/ ψmesons in high-multiplicity pPbcollisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy √sNN=8.16 TeV. Prompt J/ ...
    • Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration; TOTEM Collaboration (2018) [Journal article]
      The process pp ! p`+`􀀀p( ), with `+`􀀀 a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the rst time at the LHC in pp collisions at ps = 13TeV. One of the two scattered ...
    • Observation of sngle tp quark production in association with a Z boson in proton-proton collisions at √s=13 TeV 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2019) [Journal article]
      Resumo não disponível
    • Observation of the transparency of a resonant medium to zero-degree optical pulses 

      Grieneisen, Hans Peter Henrik; Goldhar, J.; Kurnit, N.A.; Javan, A.; Schlossberg, H.R. (1972) [Journal article]
      Experiments are described in which low-intensity laser pulses of zero area [f:'m8(z, t) dt=O) are propagated through a degenerate resonantly absorbing medium with greatly reduced absorption. These pulses are constructed ...
    • Observation of the Z → ψl+l− decay in pp collisions at √s=13 TeV 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2018) [Journal article]
    • Observation of the χb1(3P) and χb2(3P) and measurement of their masses 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2018) [Journal article]
    • Observation of t¯tH production 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2018) [Journal article]
      The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of ffiffiffi s p ¼ 7, 8, and 13 ...
    • Observation of two excited B+c states and measurement of the B+c(2S) mass in pp collisions at √s=13 TeV 

      Sirunyan, A. M.; Silveira, Gustavo Gil da; CMS Collaboration (2019) [Journal article]
      Resumo não disponível
    • Observation of two new L4 Neptune Trojans in the Dark Energy Survey supernova fields 

      Gerdes, David W.; Jennings, R. J.; Bernstein, Gary M.; Sako, Masao; Adams, Fred; Goldstein, Daniel Abraham; Kessler, Richard S.; Hamilton, S.; Abbott, Timothy M. C.; Abdalla, Filipe B.; Allam, Sahar S.; Benoit-Lévy, Aurélien; Bertin, Emmanuel; Brooks, D.; Buckley-Geer, Elizabeth; Burke, David Lyle; Capozzi, Diego; Carnero Rosell, Aurelio; Carrasco Kind, Matías; Carretero Palacios, Jorge; Cunha, Carlos Eduardo; D'Andrea, Christopher B.; Costa, Luiz N. da; DePoy, Darren L.; Desai, S.; Dietrich, Jörg P.; Doel, Peter; Eifler, Tim; Fausti Neto, Angelo; Flaugher, Brenna; Frieman, Joshua A.; Gaztañaga, Enrique; Gruen, Daniel; Gruendl, Robert A.; Gutierrez, Gaston R.; Honscheid, K.; James, David J.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Lahav, Ofer; Li, T. S.; Maia, Marcio Antonio Geimba; March, Marisa Cristina; Martini, Paul; Miller, Christopher J.; Miquel, Ramon; Nichol, Robert C.; Nord, Brian Dennis; Ogando, Ricardo L.C.; Plazas Malagón, Andrés Alejandro; Romer, Anita K.; Roodman, Aaron; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Schubnell, Michael; Sevilla Noarbe, Ignacio; Smith, Robert Christopher; Soares-Santos, Marcelle; Sobreira, Flávia; Suchyta, Eric; Swanson, Molly E. C.; Tarle, Gregory; Thaler, Jon J.; Walker, Alistair; Wester, William Carl; Zhang, Yuanyuan; DES Collaboration (2016) [Journal article]
      We report the discovery of the eighth and ninth known Trojans in stable orbits around Neptune’s leading Lagrange point, L4. The objects 2014QO441 and 2014QP441 were detected in data obtained during the 2013–14 and 2014–15 ...
    • Observations of the pulsating white dwarf G 185-32 

      Castanheira, Bárbara Garcia; Kepler, Souza Oliveira; Moskalik, Pawel; Zola, Staszek; Pajdosz, Gabriel; Krzesinski, Jerzy; O'Donoghue, Darragh; Katz, M.; Buckley, David A.H.; Vauclair, Gérard; Dolez, Noël; Chevreton, Michel; Barstow, Martin A.; Kanaan Neto, Antonio Nemer; Giovannini Junior, Odilon; Provencal, Judith L.; Kawaler, Steven D.; Clemens, J. Christopher; Nather, R. Edward; Winget, Donald Earl; Watson, Todd K.; Yanagida, K.; Dixson, James S.; Hansen, Carl J.; Bradley, Paul A.; Wood, Matthew A.; Sullivan, Denis J.; Kleinman, Scot James; Meistas, Edmundas G.; Solheim, Jan-Eric; Bruvold, A.; Leibowitz, Elia M.; Mazeh, Tsevi; Koester, D.; Montgomery, Michael Houston (2004) [Journal article]
      We observed the pulsating hydrogen atmosphere white dwarf G 185–32 with the Whole Earth Telescope in 1992. We report on a weighted Fourier transform of the data detecting 18 periodicities in its light curve. Using the ...
    • Observatório Central da UFRGS : o mais antigo do Brasil? 

      Livi, Silvia Helena Becker (1996) [Journal article]
    • Obtenção de biodiesel por transesterificação em dois estágios e sua caracterização por cromatografia gasosa : óleos e gorduras em laboratório de química orgânica 

      Oliveira, Diogo Müller de; Ongaratto, Diego Paulo; Fontoura, Luiz Antonio Mazzini; Naciuk, Fabricio Fredo; Santos, Vinícius Oliveira Batista dos; Kunz, Jéssica Danieli; Marques, Marcelo Volpatto; Souza, Alexander Ossanes de; Pereira, Claudio Martin Pereira de; Samios, Dimitrios (2013) [Journal article]
      Methanolic transesterification of oils and fats was carried out in a two steps procedure, under basic and acidic catalysis. Palm, soybean, canola, corn, rice, grapeseed, sunflower, peanut, pequi and olive oils, besides ...
    • Obtencao de polietileno linear de baixa densidade utilizando catalisadores ziegler-natta homogeneos e 1-hexeno como comonomero 

      Scipioni, Rosangela Breda; Mauler, Raquel Santos; Galland, Griselda Ligia Barrera; Quijada, Raul (1994) [Journal article]
      A homopolimerização de etileno e sua copolimerização com 1-hexeno foram investigadas utilizando-se os catalisadores liegler-Natta homogêneos Et[Ind]2ZrCl2 [Ind]2ZrCl2, Cp2ZrCl2 e Me2SiCpZrCl2. Os catalisadores Me2SiCpZrCl2 ...