Ages and abundances in large-scale stellar disks of nearby S0 galaxies

By undertaking deep long-slit spectroscopy with the focal reducer SCORPIO of the Russian 6m telescope, we studied stellar population properties and their variation with radius in 15 nearby S0 galaxies sampling a wide range of luminosities and environments. For the large-scale stellar disks of S0s, we have measured SSP-equivalent metallicities ranging from the solar one down to [Z/H]=-0.4 - -0.7, rather high magnesium-to-iron ratios, [Mg/Fe] > +0.2, and mostly old SSP-equivalent ages. Nine of 15 (60%) galaxies have large-scale stellar disks older than 10 Gyr, and among those we find all the galaxies which reside in denser environments. The isolated galaxies may have intermediate-age stellar disks which are 7-9 Gyr old. Only two galaxies of our sample, NGC 4111 and NGC 7332, reveal SSP-equivalent ages of their disks of 2-3 Gyrs. Just these two young disks appear to be thin, while the other, older disks have scale heights typical for thick stellar disks. The stellar populations in the bulges at radii of 0.5r_eff are on the contrary more metal-rich than the solar metallicity, with the ages homogeneously distributed between 2 and 15 Gyr, being almost always younger than the disks. We conclude that S0 galaxies could not form in groups at z=0.4 as is thought now; a new scenario of the general evolution of disk galaxies is proposed instead.Comment: Accepted to the MNRA

Star formation in outer rings of S0 galaxies. II. NGC 4513 -- a multi-spin ringed S0 galaxy

Though S0 galaxies are usually thought to be `red and dead', they demonstrate often star formation organized in ring structures. We try to clarify the nature of this phenomenon and its difference from star formation in spiral galaxies. The moderate-luminosity nearby S0 galaxy, NGC 4513, is studied here. By applying long-slit spectroscopy along the major axis of NGC 4513, we have measured gas and star kinematics, Lick indices for the main body of the galaxy, and strong emission-line flux ratios in the ring. After inspecting the gas excitation in the ring using the line ratios diagnostic diagrams and have assured that it is ionized by young stars, we have determined the gas oxygen abundance by using popular strong-line calibration methods. We have estimated star formation rate (SFR) in the outer ring by using the archival Galaxy Evolution Explorer (GALEX) ultraviolet images of the galaxy. The ionized gas counterrotates the stars over the whole extension of NGC 4513 so being accreted from outside. The gas metallicity in the ring is slightly subsolar, [O/H]=-0.2 dex, matching the metallicity of the stellar component of the main galactic disc. However the stellar component of the ring is much more massive than can be explained by the current star formation level in the ring. We conclude that probably the ring of NGC 4513 is a result of tidal disruption of a massive gas-rich satellite, or it may be a consequence of a long star-formation event provoked by a gas accretion from a cosmological filament having started some 3 Gyr ago.Comment: 8 paged, 7 figures, accepted for publication in A&

ACTUAL PROBLEMS OF PERSONNEL POLICY AT THE ENTERPRISES OF PASSENGER MOTOR TRANSPORT

In the article the urgency of formation and implementation of personnel policies at the sector enterprises. The role of the labor potential in securing and improving the competitiveness of the passenger motor transportation enterprises. Major issues of personnel policy of the passenger transport company by key categories of staff. The focus is on driving employment potential as the dominant factor of influence on the personnel policy of the public transport company. The generated model of a real personnel policy passenger transport company to date and it identifies the main "bottlenecks". In conclusion, the evaluation of the status of the personnel policy in the General structure of various areas of functioning of the passenger motor transport enterprise

Interface Phonons and Polaron States in Quantum Nanostructures

The interface optical phonons arise near the hetero-interface of a quantum nanostructure. Moreover, its spectrum and dispersion laws may differ from ones for excitations arising in the bulk materials. The study of such excitations can give fundamentally new information about the optical and transport properties of nanostructures. The interaction of charged particles with polar optical phonons can lead to the large radius polaron creation in the materials with high ionicity. This chapter deals with the results of our theoretical investigations of the polaron states in quantum wells, quantum wires, and quantum dots. The charged particle and exciton interaction with both bulk and interface optical phonons are taken into account. The original method has been developed taking into consideration an interface phonon influence. The enhancement conditions are found for both strong and weak interactions. It is established that the barrier material dielectric properties give a decisive contribution to the polaron binding energy value for strong electron-phonon interaction. The manifestation of strong polaron effects is a pronounced demonstration of the interface optical phonon influence on optical and transport properties of nanostructures

MILESTONES OF PERSONNEL MANAGEMENT SCIENCE IN RUSSIA

The article below reviews our country staff management art main development stages. Author in details describe pre-Soviet Russia staff management art key features. Soviet Russia positive HR management sides pointed. In addition, these value losses related with market economy transition. Staff management department’s workflow main issues considering for the moment. Author emphasize dedicated HR specialist’s educational programs poor level. Finally, there is modern HR service function list presented. Such a list secure successful enterprises functioning for today

MILESTONES OF PERSONNEL MANAGEMENT SCIENCE IN RUSSIA

The article below reviews our country staff management art main development stages. Author in details describe pre-Soviet Russia staff management art key features. Soviet Russia positive HR management sides pointed. In addition, these value losses related with market economy transition. Staff management department’s workflow main issues considering for the moment. Author emphasize dedicated HR specialist’s educational programs poor level. Finally, there is modern HR service function list presented. Such a list secure successful enterprises functioning for today

ACTUAL PROBLEMS OF PERSONNEL POLICY AT THE ENTERPRISES OF PASSENGER MOTOR TRANSPORT

In the article the urgency of formation and implementation of personnel policies at the sector enterprises. The role of the labor potential in securing and improving the competitiveness of the passenger motor transportation enterprises. Major issues of personnel policy of the passenger transport company by key categories of staff. The focus is on driving employment potential as the dominant factor of influence on the personnel policy of the public transport company. The generated model of a real personnel policy passenger transport company to date and it identifies the main "bottlenecks". In conclusion, the evaluation of the status of the personnel policy in the General structure of various areas of functioning of the passenger motor transport enterprise

The Formation of New Political Science in Modern Russia

The article is devoted to the necessity of clarifying basic definitions accepted in our modern political science, such as «politics», «culture», «political culture», «civil society», «civic culture»and others. The author argues that this clarification of concepts may be useful in the formation of a new Russian political science, which would take into account specific national features of the past and present development of the country. The present piece is meant to be the first of a series of articles by the same author in whom she intends to further develop the discussion on the object, concepts and methods of Russian political science

Unconquered by the Blockade

In the book of A.F. Izmailov, “Unconquered by the blockade”, the relevant topic is first considered through the history of human destinies, documentary memories of the participants in the events