Is KPD 1930+2752 a good SN Ia progenitor?

We investigate the evolution of a binary system which initially has an orbital period of 2^h 17^m and contains a 0.5 M_sun helium star with a white dwarf companion of 0.97 M_sun, similarly to suggested SN Ia candidate progenitor KPD 1930+2752. We show that the helium star completes core helium burning and becomes a white dwarf before components merge. The most probable outcome of the merger of components is formation of a massive white dwarf, despite initially the total mass of the system is above the Chandrasekhar mass

The mathematical model of the law on the correlation of unique competencies with the emergence of new consumer markets

The article deals with the applied aspects of assessing the influence degree of unique competencies on the process of creating innovative technologies and forming new consumer markets. It also builds the economic model, which demonstrates the presence of this correlation. Paper formulates the law on spiral dependence of the competences level on the emergence of new markets. The authors proposed mathematical instruments based on simulation modeling, which confirms the objectivity of the derived law.peer-reviewe

Non-conservative Evolution of Cataclysmic Variables

We suggest a new mechanism to account for the loss of angular momentum in binaries with non-conservative mass exchange. It is shown that in some cases the loss of matter can result in increase of the orbital angular momentum of a binary. If included into consideration in evolutionary calculations, this mechanism appreciably extends the range of mass ratios of components for which mass exchange in binaries is stable. It becomes possible to explain the existence of some observed cataclysmic binaries with high donor/accretor mass ratio, which was prohibited in conservative evolution models.Comment: LaTeX, 32 pages, to be published in Astron. Z

Imagination of the North in Context of Development of Natural Environment: Mammoth in Mythological Representations of Yakuts

A number of negative characters in Yakut mythology, as well as individual images of folklore, are considered. The point of view, according to which the basis for the emergence of certain mythological ideas among the Yakuts was the real world, the features of the landscape and climate, to the extent that they influenced a person, is proved. It is noted that the culture of the Sakha people is based on rich mythological concepts that have developed during the development of the vast expanses of the Arctic space. The authors analyze ethnographic notes of the XIX—XX centuries and modern scientific publications, which examine the mythology and folklore of the Sakha people (Yakuts). An attempt has been made to clarify the question of the influence of knowledge about the fossil remains of the mammoth fauna on the formation of mythological ideas related to the peculiarities of the climate of the region being developed. The image of a mammoth is analyzed in the broad context of the mythological views of the Yakuts. It is concluded that secondary esoteric ideas about mammoths, caused by the discovery of their remains, could form the basis of a prototypical image for a number of characters in Yakut mythology, for example, a water bull and a cold bull. It is proved that the idea of mammoths could be reflected in the external appearance of the abaasy heroes in the epic folklore of the Sakha

Axiological survey of the modern cultural-educational practices of personality

The monograph is devoted to the hardly explored topic that reveals methodological, theoretical and praxeological potential of modern cultural- educational practices of personality as a unity of diversity and continuum of methods of human’s existence, synthesis of its life practices, in particular economic, religious, political and etc. The authors updated the role of education, science, cultural-educational practices in common to mankind sense in modernization of cultural-spiritual life. The monograph can be used by scholars, postgraduate students and students. The majority of the problems that are highlighted in the monograph have discursive and discussion character and incite to competent dialogue between all people that are interested in these questions

IMPORTANCE OF IMPLEMENTATION OF THE PRODUCTION SYSTEM AT THE RUSSIAN ENTERPRISES

This article examines the study of production systems in Russia and the features of their implementation at the Russian enterprise Rosatom

The Atmospheric Chemistry Suite (ACS) of Three Spectrometers for the ExoMars 2016 Trace Gas Orbiter

The Atmospheric Chemistry Suite (ACS) package is an element of the Russian contribution to the ESA-Roscosmos ExoMars 2016 Trace Gas Orbiter (TGO) mission. ACS consists of three separate infrared spectrometers, sharing common mechanical, electrical, and thermal interfaces. This ensemble of spectrometers has been designed and developed in response to the Trace Gas Orbiter mission objectives that specifically address the requirement of high sensitivity instruments to enable the unambiguous detection of trace gases of potential geophysical or biological interest. For this reason, ACS embarks a set of instruments achieving simultaneously very high accuracy (ppt level), very high resolving power (>10,000) and large spectral coverage (0.7 to 17 μm—the visible to thermal infrared range). The near-infrared (NIR) channel is a versatile spectrometer covering the 0.7–1.6 μm spectral range with a resolving power of ∼20,000. NIR employs the combination of an echelle grating with an AOTF (Acousto-Optical Tunable Filter) as diffraction order selector. This channel will be mainly operated in solar occultation and nadir, and can also perform limb observations. The scientific goals of NIR are the measurements of water vapor, aerosols, and dayside or night side airglows. The mid-infrared (MIR) channel is a cross-dispersion echelle instrument dedicated to solar occultation measurements in the 2.2–4.4 μm range. MIR achieves a resolving power of >50,000. It has been designed to accomplish the most sensitive measurements ever of the trace gases present in the Martian atmosphere. The thermal-infrared channel (TIRVIM) is a 2-inch double pendulum Fourier-transform spectrometer encompassing the spectral range of 1.7–17 μm with apodized resolution varying from 0.2 to 1.3 cm−1. TIRVIM is primarily dedicated to profiling temperature from the surface up to ∼60 km and to monitor aerosol abundance in nadir. TIRVIM also has a limb and solar occultation capability. The technical concept of the instrument, its accommodation on the spacecraft, the optical designs as well as some of the calibrations, and the expected performances for its three channels are described

Evolution of the number of accreting white dwarfs with shell nuclear burning and of occurrence rate of SN Ia

We analyze temporal evolution of the number of accreting white dwarfs with shell hydrogen burning in semidetached and detached binaries. We consider a stellar system in which star formation lasts for 10 Gyr with a constant rate, as well as a system in which the same amount of stars is formed in a single burst lasting for 1 Gyr. Evolution of the number of white dwarfs is confronted to the evolution of occurrence rate of events that usually are identified with SN Ia or accretion-induced collapses, i.e. with accumulation of Chandrasekhar mass by a white dwarf or a merger of a pair of CO white dwarfs with total mass not lower than the Chandrasekhar one. In the systems with a burst of star formation, at $t=$10 Gyr observed supersoft X-ray sources, most probably, are not precursors of SN Ia. The same is true for an overwhelming majority of the sources in the systems with constant star formation rate. In the systems of both kinds mergers of white dwarfs is the dominant SN Ia scenario. In symbiotic binaries, accreting CO-dwarfs do not accumulate enough mass for SN Ia explosion, while ONeMg-dwarfs finish their evolution by an accretion-induced collapse with formation of a neutron star.Comment: 11 pages, 2 figures, accepted by Astronomy Letter

New method for determination of vaporization and sublimation enthalpy of aromatic compounds at 298.15 K using solution calorimetry technique and group-additivity scheme

© 2015 Elsevier B.V. All rights reserved. In this work a new method for determination of vaporization/sublimation enthalpies of aromatic compounds directly at T = 298.15 K was developed. This method is based on the general relationship between vaporization/sublimation enthalpy and enthalpies of solution and solvation of the studied compound in any solvent. According to this method the procedure for determination of vaporization (liquids) or sublimation (solids) enthalpy includes measurement of the solution enthalpy of the compound in a selected solvent and calculation of the solvation enthalpy for this system. A group-additivity scheme for calculation of solvation enthalpies is proposed. The solvation enthalpy of compound is estimated from the solvation enthalpy of parent aromatic or heteroaromatic compound and contributions of the substituent groups. Limiting solution enthalpies of 34 aromatic compounds (substituted benzenes, naphthalenes, biphenyls, pyrene, anthracene and pyridines) in carbon tetrachloride, benzene, acetonitrile and N,N-dimethylformamide were measured in the present work at 298.15 K. Vaporization/sublimation enthalpies of 78 aromatic and heteroaromatic compounds were determined directly at 298.15 K using experimentally measured solution enthalpies and predicted values of solvation enthalpies. The results are in good agreement with available literature data