23 research outputs found
Relativistic Description of Exclusive Deuteron Breakup Reactions
The exclusive deuteron break-up reaction is analyzed within a covariant
approach based on the Bethe-Salpeter equation with realistic meson-exchange
interaction. Relativistic effects in the cross section, tensor analyzing power
and polarization transfer are investigated in explicit form. Results of
numerical calculations are presented for kinematical conditions in forthcoming
p + D reactions at COSY.Comment: 10 LaTeX pages, 4 eps-figure
Estimation of the Dihedral Angle Between Metal Nanoparticles During Their Coalescence
The process of coalescence of various metal nanoparticles has been studied by the Monte Carlo method.
The interaction of nanoparticles is described by a multiparticle Gupta type potential. An algorithm of recognizing
and estimating a dihedral angle at the neck is developed. The dihedral angle between metal nanoparticles
during their sintering is estimated
Measurement of prompt hadron production ratios in collisions at 0.9 and 7 TeV
The charged-particle production ratios , , ,
, and are measured with the LHCb detector using of collisions delivered by the LHC at TeV and
at TeV. The measurements are performed as a
function of transverse momentum and pseudorapidity . The
production ratios are compared to the predictions of several Monte Carlo
generator settings, none of which are able to describe adequately all
observables. The ratio is also considered as a function of rapidity
loss, , and is used to constrain models of
baryon transport.Comment: Incorrect entries in Table 2 corrected. No consequences for rest of
pape
Perturbative transport experiments on TJ-II Flexible Heliac
Transport properties of TJ-II are explored performing perturbative experiments and taking advantage of TJ-II flexibility. Rotational transform can be varied in a wide range, which allows one to introduce low order rationals and to study their effect on transport. On the other hand, confinement properties can be studied at very different rotational transform values and for different values of magnetic shear: Experiments on influence of the magnetic shear on confinement are reported. In these cases a Ohmic current has been induced in TJ-II plasma to modify magnetic shear and to evaluate itsd effect on confinement, showing that negative shear improves the confinement. Heat transport is also reduced by locating a low order rational near the power deposition profile. Plasma potential profiles have been recently measured in some configurations up to the plasma core with the Heavy Ion Beam Probe (HIBP) diagnostic and the electric field values measured in low-density plasmas are consistent with neoclassical calculations near the plasma core. Plasma edge turbulent transport has been studied in configurations that are marginally stable due to decreased magnetic well. Results show a dynamical coupling between gradients and turbulent transport. Finally, cold pulse propagation has been studied showing ballistic non diffusive propagation
Passive Q-switching and mode-locking for the generation of nanosecond to femtosecond pulses
The intensifying effect of carbon nanoparticles on formation of microarc coatings on aluminum alloys
Intensification of microplasma discharges in the formation of ceramic coatings on aluminum alloys exposed to carbon nanoparticles
Anxiety: Phenomenology, epidemiology, and risk factors during the novel coronavirus SARS-CoV-2 (COVID-19) pandemic [Тревожность: феноменология, эпидемиология и факторы риска на фоне пандемии, вызванной новым коронавирусом SARS-CoV-2 (COVID-19)]
The novel coronavirus disease 2019 (COVID-19) pandemic has caused significant negative clinical and social impact on peoples' life worldwide. Anxiety, one of the most prevalent mental conditions, tends to spread during periods of social upheaval. The present paper examines the problem of anxiety and reviews epidemiology of anxiety, its risk factors and underlying mechanisms. It discloses associations between anxiety and addictions, lifestyle factors and traumatic childhood experience, and discusses increased anxiety in the context of the novel coronavirus disease (COVID-19) pandemic in Russia. © 2021 Ima-Press Publishing House. All rights reserved