Results 31 to 40 of about 948,736 (243)
Atomic Lithium Excitation by Electron Impact
Journal of Kufa-Physics, 2019 Bethe approximation had been used to compute the excitation cross section in term of the diploe oscillator strength for some allowed transitions between energy levels of Li-atom collide with electrons with impact energy range (2-2000) eV. We also compute
Rabab M. Abdul Hassan, Alaa A. Khalaf
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, 1999 We calculate in the next-to-leading approximation the non-forward quark impact factors for both singlet and octet color representation in the $t$-channel.
A. Papa +53 more
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Visual nesting impacts approximate number system estimation [PDF]
Attention, Perception, & Psychophysics, 2012 The approximate number system (ANS) allows people to quickly but inaccurately enumerate large sets without counting. One popular account of the ANS is known as the accumulator model. This model posits that the ANS acts analogously to a graduated cylinder to which one "cup" is added for each item in the set, with set numerosity read from the "height" of
Dana L, Chesney, Rochel, Gelman
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The impact factor for the virtual photon to light vector meson transition
, 2004 We evaluate in the next-to-leading approximation the forward impact factor for the virtual photon to light vector meson transition in the case of longitudinal polarization. We find that in the hard kinematic domain, both in the leading and in the next-to-
A. Papa +28 more
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Ensemble-based approximation of observation impact using an observation-based verification metric
Tellus: Series A, Dynamic Meteorology and Oceanography, 2016 Knowledge on the contribution of observations to forecast accuracy is crucial for the refinement of observing and data assimilation systems. Several recent publications highlighted the benefits of efficiently approximating this observation impact using ...
Matthias Sommer, Martin Weissmann
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Photoassociation spectra and the validity of the dipole approximation for weakly bound dimers
, 2010 Photoassociation (PA) of ultracold metastable helium to the 2s2p manifold is theoretically investigated using a non-perturbative close-coupled treatment in which the laser coupling is evaluated without assuming the dipole approximation.
D. M. Brink +3 more
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Electron loss from medium-energy projectiles in collisions with heavy target atoms [PDF]
, 1979 . The energy and angular distribution of projectile electrons emitted in asymmetric collisions is calculated within the quantum mechanical electron impact approximation.
Jakubaßa-Amundsen, Doris H.
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Impact of the Peterlin approximation on polymer dynamics in turbulent flows [PDF]
Physical Review E, 2015 We study the impact of the Peterlin approximation on the statistics of the end-to-end separation of polymers in a turbulent flow. The finitely extensible nonlinear elastic (FENE) model and the FENE model with the Peterlin approximation (FENE-P) are numerically integrated along a large number of Lagrangian trajectories resulting from a direct numerical ...
Vincenzi, D +3 more
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AtomsIn the present paper, we revisit the determination of Feshbach resonances in the elastic and fine-structure cross-sections of the spectral lines of ionized atoms colliding with electrons.
Sylvie Sahal-Bréchot, Haykel Elabidi
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Modelling of tsunami-like wave run-up, breaking and impact on a vertical wall by SPH method [PDF]
Natural Hazards and Earth System Sciences, 2013 Accurate predictions of wave run-up and run-down are important for coastal impact assessment of relatively long waves such as tsunami or storm waves. Wave run-up is, however, a complex process involving nonlinear build-up of the wave front, intensive ...
M. H. Dao, H. Xu, E. S. Chan, P. Tkalich
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