Evolution of dwarf galaxies in the Centaurus A group

We consider star formation properties of dwarf galaxies in Cen A group observed within our HST/ACS projects number 9771 and 10235. We model color-magnitude diagrams of the galaxies under consideration and measure star formation rate and metallicity dependence on time. We study environmental dependence of the galaxy evolution and probable origin of the dwarf galaxies in the group.Comment: To appear in proceedings IAU Symp 244, 'Dark Galaxies and Lost Baryons', June 200

Magnetic properties of polymerized C60_{60} with Fe

We provide evidence that high-pressure high-temperature (2.5 GPa and 1040 K) treatment of mixtures of iron with fullerene powders leads to the complete transformation of iron into iron carbide Fe$_3$C. The comparison of the magnetic properties (Curie temperature and magnetic moment) of the here studied samples and those for the ferromagnetic polymer Rh-C$_{60}$ indicates that the main ferromagnetic signal reported in those samples is due to Fe$_3$C and not related to the ferromagnetism of carbon as originally interpreted. Taking into account the results obtained in this study the original paper on ``Magnetic carbon" (Nature {\bf 413}, 716 (2001)) was recently retracted.Comment: 5 Figures, 4 page

B,V,I - photometry of 20 dwarf irregular galaxies within 10 Mpc

CCD - photometry is presented for 20 dIrr galaxies situated in the nearby complexes CenA/M83, and CVnI as well as in the general field of the Local Volume. We present integrated magnitudes of the galaxies in B,V,I - bands and also surface brightness profiles to a median isophote mu_B ~ 28 mag /sq.arcsec. The popular Sersic parameterization of surface brightness profiles generally does a poor job of simultaneously fitting the inner cores and outer exponential surface brightness fall-offs observed in many of our targets. The observed sample is a part of a general project to image about 500 nearby (D < 10 Mpc) dwarf galaxies in multiple bands.Comment: 3 figures, accepted to the MNRA

BLENDING PEDAGOGY AND DIGITAL TECHNOLOGY TO TRANSFORM EDUCATIONAL ENVIRONMENT

This article shows efficacy of competences-oriented education model, representing effectiveness of pedagogy technology and digital tools blending in transforming education while using tutor’s support. In correspondence to contemporary requirements and education system special features, connection between digital education tools and tutor technology contributing to students’ key competences development is determined. The paper contributes to the field by summarizing some theoretical issues and offering implementation suggestions for effectively integrating digital technologies into teaching and learning. The use of digital technologies in educational activities opens up new opportunities, adequate methods for dissemination and management of digital information, development of necessary competencies on the basis of digital literacy, ensuring equitable access for all who wish to obtain necessary knowledge and decision-making skills, ensuring demand for school graduates in the world labor market in situation of digital economy. Innovative technologies become a problem adding difficulties to students’ burden. Tutor becomes an intermediary between students and digital technologies to promote students’ active learning practices; there are not so many students who can appreciate digital learning practices and get the most of it. The role of tutoring in digital literacy promotion is hard to overestimate. Tutor support is a pedagogical activity in individualization of education aimed at identifying and developing students’ educational motives and interests. To form students’ key competencies in education system, it is necessary to supplement traditional education with tools of digital educational technologies, new trends in pedagogies such as tutoring, which is becoming an integral part of modern learning process

Spin-transfer mechanism of ferromagnetism in polymerized fullerenes: AbinitioAb initio calculations

A mechanism of the high temperature ferromagnetism in polymerized fullerenes is suggested. It is assumed that some of the C$_{60}$ molecules in the crystal become magnetically active due to spin and charge transfer from the paramagnetic impurities (atoms or groups), such as hydrogen, fluorine, hydroxyl group OH, amino group NH$_2$, or methyl group CH$_3$, dispersed in the fullerene matrix. The exchange interaction between the spins localized on the magnetically active fullerenes is evaluated using \textit{ab initio} calculations. The nearest neighbour and next nearest neighbour exchange interaction is found to be in the range $0.1\div 0.3$ eV, that is, high enough to account for the room temperature ferromagnetism.Comment: typos corrected, 8 pages, 3 figures, LaTe

Transformation of normative personality in Russian society

The aim of the study is to identify the characteristics of normative personality in the different periods of the history of Russian society. The author's methods are comparative analysis and in-depth interview method. The result of the study are normative personality constructs on the conceptual and practical levels.Целью исследования является выявление характеристик нормативной личности в различные периоды истории российского общества. Автор применял метод сравнительного анализа и метод глубинного интервью. Результатом исследования являются конструкты нормативной личности на концептуальном и социально-практическом уровнях