Light elements in massive single and binary stars

We highlight the role of the light elements (Li, Be, B) in the evolution of massive single and binary stars, which is largely restricted to a diagnostic value, and foremost so for the element boron. However, we show that the boron surface abundance in massive early type stars contains key information about their foregoing evolution which is not obtainable otherwise. In particular, it allows to constrain internal mixing processes and potential previous mass transfer event for binary stars (even if the companion has disappeared). It may also help solving the mystery of the slowly rotating nitrogen-rich massive main sequence stars.Comment: 10 pages, 8 figures, to appear in proc. IAU-Symp. 268. C. Charbonnel et al., eds

Energy nonequipartition in a sheared granular mixture

The kinetic granular temperatures of a binary granular mixture in simple shear flow are determined from the Boltzmann kinetic theory by using a Sonine polynomial expansion. The results show that the temperature ratio is clearly different from unity (as may be expected since the system is out of equilibrium) and strongly depends on the restitution coefficients as well as on the parameters of the mixture. The approximate analytical calculations are compared with those obtained from Monte Carlo simulations of the Boltzmann equation showing an excellent agreement over the range of parameters investigated. Finally, the influence of the temperature differences on the rheological properties is also discussed.Comment: 3 figure

Partially Quenched QCD with Non-Degenerate Dynamical Quarks

We discuss the importance of using partially quenched theories with three degenerate quarks for extrapolating to QCD, and present some relevant results from chiral perturbation theory.Comment: LATTICE99 talk. 3 pages, 2 figures. Uses epsf and espcrc2.st

Revealing frame dynamics through comparing associative fields in diachrony

The article shows that the changes of an associative field in diachrony can somewhat schematically, but quite accurately reflect the dynamics of the corresponding frame over time. The undertaken comparative analysis of associative fields of stimuli ‘napitok’ (drink) and ‘pit’yo’ (drink(ing)) - as of 1988-1997 (the data of “Russian associative dictionary”) and 2013-2014 (the results of the author experiment) - helps to develop the model of the frame “drink” - to the extent of slots actualized through associative reactions - and reveals some changes in its structure. Ascertained dynamics implies variation in the relevancy of almost all slots. The revealed trends also reflect some harmonization of this frame with its Western analoguesye

Application of Hartree-Fock theory of fluctuations to opacity calculation

The Hartree-Fock theory of fluctuations leading to simple formulae for configuration probabilities is used in a Detailed Configuration Accounting calculation of opacity in the case of an iron plasma. A direct Detailed Term Accounting method is also applied. The correlations of subshell occupation numbers, which are accounted for in the HF theory, show small effect on the theoretical spectrum corresponding to conditions of a recent measuremen