134 research outputs found

    Interfacial Coatings on Carbon Fibers

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    Multiple hafnium germanate interphase for SiC / SiCf composites

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    REASONS OF STUDENT SOCIAL APATHY

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    The purpose of the article: The purpose of this study is to identify the social representations of students about the manifestations of social apathy and its causes. The leading methods for the study of this problem are the method of questioning, which allows conducting a qualitative analysis of students’ social representations about the manifestations of social apathy and its causes; to identify the opinion of students about the manifestations of social apathy in the behavior of young people. Materials and methods: As the main method of research in this work, the method of questioning is chosen. Results of the research: Positions of overcoming of social apathy are allocated: social apathy is a personal problem with which the person has to cope independently, nobody can help him with it; the help of collective in the solution of this problem is necessary; participation of professional psychologists is necessary. The point of view of students is revealed that the solution to this problem has to be complex: the person, collective, psychologists, other social institutions. A number of features of social behavior attributed to people subject to social apathy are shown: unsociability, isolation, irresponsibility, passivity, immersion in their own problems, exposure to someone else's influence, and an understated level of claims. Applications: This research can be used for universities, teachers, and students. Novelty/Originality: In this research, the model of reasons for student social apathy is presented in a comprehensive and complete manner

    Myth as a Means of Ordering and Organizing Social Reality

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    This study investigates the phenomenon of social myth as a factor of forming and transforming the consciousness of social actors. It is defined that one of the factors of appealing to mythological representation of reality is the crisis of scientific orientations of modernism. In this plane, the article studies phenomenological receptions of myth as well as the process of mythologization of modern social reality. Moreover, attention is drawn to the fact that mythologization fixes an idea of social reality and its axiological (value) dimension in the consciousness of separate individuals and their groups. Myths are axiological indicators; the more controversial society values are the greater number of myths is produced by social consciousness to eliminate these contradictions. The difference between modern and archaic myth has both qualitative and quantitative aspects. Modern society generates a great number of myths with much more narrow content. This is a consequence of "specialization" of myths, their orientation towards solving particular local tasks: political, economic, etc. Functional and structural changes of social myths can be accounted for by critical, permanently transitional condition of society in which myth compensates the unformed elements of new social practices. However, the content side of myth is not a crisis but social request and values of particular culture. The question about the necessity to fight against myths probably should be answered negatively if we don’t mean the most dangerous myths posing a serious threat for society. Myths are in harmony with social consciousness and arise in places where there is a fault between current and desirable normativity. Thus, when social practices become stable social consciousness itself displaces and nullifies myths that are responsible for harmonization of new order and they become demanded

    Crystal and Electronic Structures of Alluaudite-Type Double Molybdates of Scandium and Indium

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    Double molybdates of indium and scandium with alluaudite structure are prepared by the solid-phase synthesis method. The crystal structure of the indium containing compound is refined and optical characteristics of Na5R(Mo04)4(R = Sc, In) are determined. Electronic structures of Na5R(Mo04)4(R = Sc, In) molybdates are studied within the ab initio method taking account of Na/Sc(In) positional disordering. Calculations of the imaginary part of dielectric function predict the optical gap of ~3.8 eV, in accordance with absorption spectroscopy data. It is established that formation energy of sodium vacancies strongly depends on sodium position and Sc(In) concentration. As a result, various diffusion mechanisms may be activated in alluaudite-type compounds with high and low contents of metal R. © 2019, Pleiades Publishing, Ltd

    Spectroscopic observations of the exoplanet WASP-32b transit

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    © 2017, Pleiades Publishing, Ltd.We present first results of spectroscopic observations of transiting exoplanets in the Special Astrophysical Observatory of the Russian Academy of Sciences with the Main Stellar Spectrograph of the 6-m BTA telescope. For the exoplanetWASP-32b, we detected a significant variation of intensity and equivalent width in the Hα spectral line of the parent star at the time of a transit. The equivalent width of the line during transit is by 8–10% larger than outside the planet passage. Residual intensity in the core of the line reveals the following tendency: the line is by 10–15% deeper inside transit than outside it. Observations with the long-slit spectrograph of the Crimean Astrophysical Observatory at the 2.6-m ZTSh telescope also showed a transit event in the Hα line, although, with a smaller amplitude and shape inverted in relation to the data from the 6-m telescope. While in the observations with the BTA the Hα line becomes deeper during the transit, in the ZTSh observations, the residual intensity of the Hα line decreases during the transit. Reducing and analysis of the archive data of WASP-32b observations with the HARPS spectrograph also confirm the Hα line modulation at the time of the transit. The observed data give evidence of the envelope in WASP-32b filling the Roche lobe and a comet-like tail of changing geometry and orientation relative to the observer. These changes determine different depths and shapes of the Hα spectral line at the time of transits

    The Effect of Mechanical Activation on the Physico-Chemical Properties of Carbon Black and Rubber Mixtures Filled with It

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    Исследовано влияние механической активации на пористость, структурность по абсорбции дибутилфталата (ДБФ), размеры агломератов и функциональный покров поверхности технического углерода (ТУ) марки N375. Установлено, что в процессе механической активации возрастает количество кислородсодержащих групп на поверхности ТУ от 0,12 до 0,34 мэкв/г и снижается размер агрегатов от 300 до 3-5 мкм. Одновременно снижается величина абсорбции ДБФ. Резина, получаемая на основе смеси каучука марки СКМС-30 АРК и механоактивированного ТУ, отличается повышенными значениями относительного удлинения при растяжении и более низким модулем упругостиThe influence of mechanical activation on porosity, structure (by absorption of dibutyl phthalate (DBP), the size of the agglomerates and the functional surface of the carbon black (CB) N375 was investigated. It was established that in the process of mechanical activation, the number of oxygencontaining groups on the surface CB increases to 0.34 meq/g and the size of the aggregates decreases from 300 to 3-5 microns. At the same time, the amount of absorption of DBP decreases. The rubber obtained on the basis of a mixture of SKMS-30 ARK rubber and mechanically activated CB is characterized by increased values of relative elongation under tension and a lower modulus of elasticit

    SYNTHESIS OF NEW PHOSPHORS BASED ON Tm3+, Nd3+ OR Ho3+ DOPED GERMANATES BY “WET” CHEMICAL ROUTES

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    Various “wet” synthetic chemical techniques are widely used for the production of multifunctional inorganic materials. In contrast to the standard high-temperature solid state route, methods based on the dissolution of starting reagents allow one to obtain phases with given particle morphology and particle size distribution. Besides, with this approach, the defect structure can be efficiently controlled by varying the synthesis conditions and solution preparation. These advantages are important for producing luminescent materials.This work was supported by the Russian Science Foundation, project № 16-13-10111
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