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Now showing items 3018-3033 of 3033
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X-ray bursts associated with leader steps in cloud-to-ground lightning
(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
(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
(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
(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
(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
(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
(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 ... -
Ya Gotta Wanna: Shifting Motivational Priorities in the Self-Control Process
(2018-10)Self-control has been linked to a range of important academic, social, and achievement-related outcomes (Tangney et al., 2004). However, there are a variety of differing perspectives on the process by which individuals ... -
Zero Emissions Sulphur Recovery Production
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
(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
(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
(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
(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
(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
(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
(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 ...