Results 71 to 80 of about 226,197 (268)
British Journal of Educational Technology, EarlyView.Cognitive load is a critical internal state associated with learners' learning process and significantly influences learning outcomes. With the worldwide popularity of video‐based learning (VBL), tracking real‐time cognitive load variations becomes more and more important for the timely provision of adaptive learning support during the learning process.
Leisi Pei +3 more
wiley +1 more source
Isospin breaking in the pion-nucleon coupling constant and the nucleon-nucleon scattering length
Âderna Fìzika ta Energetika, 2016 Charge independence breaking (CIB) in the pion-nucleon coupling constant and the nucleon-nucleon scattering length is considered on the basis of the Yukawa meson theory.
V. A. Babenko, N. M. Petrov
doaj
Annals of Indian Academy of Neurology, 2016 Postoperative visual loss (POVL) is an unpredictable complication of nonocular surgeries. Posterior ischemic optic neuropathy (PION) is particularly feared in spinal surgeries in the prone position.
Boby Varkey Maramattom +3 more
doaj +1 more source
Effects of pion potential and nuclear symmetry energy on the $π^{-}/π^{+}$ ratio in heavy-ion collisions at beam energies around the pion production threshold [PDF]
Phys. Rev. C 91, 054616 (2015), 2014 Within the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck(IBUU) transport model, we studied the effects of the pion potential and the symmetry energy on the pion production in the central $^{197}Au+^{197}Au$ collisions around the pion production threshold.
arxiv +1 more source
Pion nucleus Drell–Yan process and parton transverse momentum in the pion
European Physical Journal C: Particles and Fields, 2018 We present a thorough analysis of unpolarized Drell–Yan (DY) pair production in pion–nucleus scattering. On the nucleus side, we use nuclear parton distributions along with parametrisations of the nucleon partonic transverse distribution available in the
Federico Alberto Ceccopieri +3 more
doaj +1 more source
Effects of multi-pion correlations on the source distribution in ultra-relativustic heavy-ion collisions [PDF]
Phys.Rev.C57:877-881,1998, 1998 Multi-pion correlation effect on the source distribution is studied. It is shown that multi-pion Bose-Einstein correlation make the average radius of the pion source become smaller. The isospin effect on the pion multiplicity distribution and the source distribution is also discussed.
arxiv +1 more source
Pion Form Factor in Chiral Limit of Hard-Wall AdS/QCD Model
, 2007 We develop a formalism to calculate form factor and charge density distribution of pion in the chiral limit using the holographic dual model of QCD with hard-wall cutoff. We introduce two conjugate pion wave functions and present analytic expressions for
A. V. Radyushkin +7 more
core +1 more source
Pion-Nucleon Scattering and Pion-Pion Interaction [PDF]
Progress of Theoretical Physics, 1962 Applying Cini-Fubini approximation to the Mandelstam representation for pion-nucleon scattering amplitude, we treat explicitly the effect of pion-pion interaction to be added to the dispersion relation given by Chew, Goldberger, Low and Nambu. On account of scanty information on the contribution to tl:e dispersion .integral from high-mass states, we ...
openaire +2 more sources
The European Physical Journal A, 2020 Both gravitons and pions are described by non-linear and non-renormalizable actions at low energies. These are most usefully treated by effective field theory, which is a full quantum field theoretic approach that relies only on the low energy degrees of freedom and their interactions.
openaire +3 more sources
Âderna Fìzika ta Energetika, 2017 Charge dependence of the pion-nucleon coupling constants and the 1S0-state low-energy nucleon-nucleon scattering parameters are studied on the basis of the Yukawa meson theory.
V. A. Babenko, N. M. Petrov
doaj