Self-concept: features at different stages of university studies

A study of the features of the Self-concept in students of the initial and final stages of study at the university is presented. It is shown that the self-esteem of students at the initial stage of training is higher than that of students at the final stage of training.Представлено исследование особенностей «Я-концепции» у студентов начального и конечного этапа обучения в вузе. Показано, что самооценка у студентов начального этапа обучения выше, чем у студентов конечного этапа обучения

TRANSFORMATION OF PUBLIC PROCUREMENT OF INDUSTRIAL PRODUCTS TAKING INTO ACCOUNT THE ENVIRONMENTAL FACTOR

Actual problems of industry and environmental aspects of their manifestation have been designated. To reduce the negative impact of industry on the environment, the authors suggest using public procurement tools. The main measures carried out by the state in the interests of ensuring environmental-oriented purchases of industrial products have been given. It has been proposed to expand the practice of using life-cycle contracts as the main way of state support for environmental-oriented procurement, which will subsequently allow you to use effectively available resources, taking into account the environmental factor. There is a large number of different methods for determining the stages of the product life cycle. An attempt was made in this article to describe the application of the environmental factor at each stage of the product life cycle using the example of industry

Theory of differential inclusions and its application in mechanics

The following chapter deals with systems of differential equations with discontinuous right-hand sides. The key question is how to define the solutions of such systems. The most adequate approach is to treat discontinuous systems as systems with multivalued right-hand sides (differential inclusions). In this work three well-known definitions of solution of discontinuous system are considered. We will demonstrate the difference between these definitions and their application to different mechanical problems. Mathematical models of drilling systems with discontinuous friction torque characteristics are considered. Here, opposite to classical Coulomb symmetric friction law, the friction torque characteristic is asymmetrical. Problem of sudden load change is studied. Analytical methods of investigation of systems with such asymmetrical friction based on the use of Lyapunov functions are demonstrated. The Watt governor and Chua system are considered to show different aspects of computer modeling of discontinuous systems

Phoebe 2.0 – Triple and multiple systems

Some close binary formation theories require the presence of a third body so that the binary orbit can shrink over time. Tidal friction and Kozai cycles transfer energy from the binary to its companion, resulting in a close inner binary and a wide third body orbit. Spectroscopy and imaging studies have found 40% of binaries with periods less than 10 days, and 96% with periods less than 3 days, have a wide tertiary companion. With recent advancements in large photometric surveys, we are now beginning to detect many of these triple systems by observing tertiary eclipses or through the effect they have on the eclipse timing variations (ETVs) of the inner-binary. In the sample of 2600 Kepler EBs, we have detected the possible presence of a third body in ∼20%, including several circumbinary planets. Some multiple systems are quite dynamical and feature disappearing and reappearing eclipses, apsidal motion, and large disruptions to the inner-binary. phoebe is a freely available binary modeling code which can dynamically model all of these systems, allowing us to better test formation theories and probe the physics of eclipsing binaries

Fungi, source of biologically active substances with important application in agricultural fields

The work was partly support by RFBR, Russia (Project № 19-516-45006) and DST, India (INT/RUS/RFBR/363) and the Ministry of Science and Higher Education of the Russian Federation (Agreement № 02.A03.21.0006)

Impact of Fungal Biologically Active Substances on Plant Growth

In this study, effects of Inonotus obliquus, Fomes fomentarius, Fomitopsis pinicola and Trichaptum pergamenum extracts on plant functions have been investigated. Barley, cucumber and tomato seeds were grown in Petri dishes containing filter paper, petri dishes have been moistened with the solutions of biologically active substances from the fungal extracts from the above-mentioned fungi species; the control petri dishes were moistened with distilled water. The impact of extracts on seeds germination seedling growth, photosynthetic pigments contents, biomass formation of shoots and roots have been determined. © 2019 Author(s).The research was supported by The Ministry of Education and Science of the Russian Federation Agreement no. 02.A03.21.0006

Fungi, Source of Biologically Active Substances with Important Application in Agricultural Fields

Eleven species (dried fruiting bodies) Fomitopsis pinicola, Cerrena unicolor, Piptoporus betulinus, Daedaleopsis tricolor, Stereum subtomentosum, Funalia trogii, Phellinus cinereus, Trametes versicolor, T. pubescens, T. gibbosa and Ganoderma applanatum were used to extract biologically active compounds (BACs) as crude fungal extracts (CFEs) in distilled water (diH2O) which was further studied to evaluate their impact on the rate of seeds germination, biosynthesis of photosynthetic pigments, biomass formation and in tomato seedlings length (Solanum lycopersicum, cv. Dubrava). The results showed that xylotrophic mushrooms are a source of potential biologically active compounds useful for agriculture. © 2022 Author(s).The work was partly supported by RFBR, Russia (Project No. 19-516-45006) and DST, India (INT/RUS/RFBR/363) and the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 02.A03.21.0006)

Formalization of hydrocarbon conversion scheme of catalytic cracking for mathematical model development

The issue of improving the energy and resource efficiency of advanced petroleum processing can be solved by the development of adequate mathematical model based on physical and chemical regularities of process reactions with a high predictive potential in the advanced petroleum refining. In this work, the development of formalized hydrocarbon conversion scheme of catalytic cracking was performed using thermodynamic parameters of reaction defined by the Density Functional Theory. The list of reaction was compiled according to the results of feedstock structural-group composition definition, which was done by the n-d-m-method, the Hazelvuda method, qualitative composition of feedstock defined by gas chromatography-mass spectrometry and individual composition of catalytic cracking gasoline fraction. Formalized hydrocarbon conversion scheme of catalytic cracking will become the basis for the development of the catalytic cracking kinetic model

Complex support of technological development of environmentally friendly toilet systems in passenger trains

Ensuring environmental-oriented turnover of fecal waste in passenger transport is necessary for the preservation of ecosystems, public health and sustainable development of transport complexes. The history of Russian railway toilet complexes begins with the launch of the first railway “Petersburg – Tsarskoe Selo” in 1837. In the USSR since 1985 The Ministry of Railways of the USSR thought about the need for experimental design work on the creation of closed systems for collecting sewage for passenger rolling stock. A set of scientific works on the creation of systems and equipment that protect the environment from chemical and  biological pollution was presented in the Railway transport program for 1990-2000.The article considers the negative impact of fecal waste on the environment and public health, as well as problems related to the maintenance of environmentally friendly toilet complexes of passenger cars. The main results of technological development of toilet complexes of transport systems have been outlined. The authors note the importance of timely comprehensive support (infrastructure, technical, organizational and economic, regulatory and methodological, personnel, and other) for the technological development of toilet complexes in the transport industry. In particular, the article reviewes some of the current problems of infrastructure, regulatory and methodological, organizational and economic support for the operation and maintenance of environmentally friendly toilet complexes. For the effective functioning of the environmentally friendly toilet complexes system of transport systems, the authors propose to use organizational and methodological tools that will allow you to systematically determine the actual level of technological development of the fecal waste disposal system of the environmentally friendly toilet complexes of passenger trains, to develop directions and measures to improve its  environmental and economic efficiency