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With the active development of the Russian stock market, new types of unfair practices and forms of illegal behavior of its participants appear. One of the latest problems that attracted the attention of the Central Bank of Russia was the influence of Telegram channels on the dynamics of shares in the Russian stock market. In order to comprehensively study the problem, based on the analysis of the publications of Telegram channels devoted to investment topics, the author identified 3 channels that most often publish investment ideas in order to influence the dynamics of the shares of a particular company. Next, 73 publications of trading ideas were selected and, using the Thomson Reuters Eikon database, the daily and weekly data on the dynamics of the stocks of the companies in the sample were downloaded. Based on the analysis of the data obtained, the mechanism and the degree of influence of the publications of Telegram channels on the dynamics of shares of individual companies of the Russian stock market, as well as the potential excessive profitability that could be obtained by administrators of Telegram channels, were determined.

Most of the authors single out megacities as a special form of settlement, and speak of exceeding the level and pace of socio-economic development. Megacities attract enterprises of various business areas, as it is believed that this will have a positive impact on their development. In this paper, we assess the industry structure of the largest cities, analyze its differences from smaller territories, and conduct a discriminant analysis in order to identify the subjects of the Russian Federation that are predisposed to the appearance of a metropolis in them.

The article presents the models used in the planning of production with unstable technology. This issue is becoming increasingly important for universities in connection with the transition of the Ministry of Science and Higher Education to the new principle of planning a state order for specialists, when the admission figures in the state assignment turn into release figures. For successful work in these conditions, universities are forced to change their system of planning for the training of specialists. The considered models are a proven tool for determining the size of the contingent and the necessary resources, which must be launched into the educational process in order to fulfill the state order by a given deadline.

Modern crop production in the conditions of total reduction of tilled area is one of the priorities in effective farming. The adaptive intensification of crop production, which provides sustainable growth of yield, resource conservation and ecological safety, requires increase of financing and involvement of plant protection measures in the mechanism of state support, the use of genetic selection potential of plants, the use of agrotechnical measures, technical and technological upgrade, for the purpose of adjustment of arable crops growth conditions, improvement of grain quality, as well as soil conservation and enrichment. Scientifically proven measures regarding plant protection against hazardous organisms play a special role in the mechanism of state support and stimulation of agricultural goods producers. This approach will make it possible to abandon abusive application of chemical agents and replace them with biological ones against the same variety of pathogens; it will facilitate increase in arable crops yield, improve of quality of goods produced, cost saving and growth of net profit, in comparison with traditional technologies, as well as mitigate risks related to the influence of chemical agents on the environment. It will increase the field competitiveness both at internal and external market. The offered measures were developed with provision for the WTO requirements which make it binding to implement the methods of state support without distorting influence of activities of companies, i.e. implement the support within the «green box». The «green box» includes the costs of plant protection measures and productive infrastructure formation.

Currently, several studies have been conducted about overspending of funds in large-scale projects, including transport. International studies show that overspending by 20-100 % is not an exception, but an established fact. The article presents the results of comparing the estimated cost with the actual costs for several large-scale transport projects that were implemented on the territory of Russia. The conclusion is made about the need for a systematic analysis when evaluating the effectiveness of projects of this class.

This article is devoted to the study of the consequences of social isolation of elderly Muscovites during the spread of coronavirus infection. The author draws attention to the fact that the informal isolation of the older generation has existed for a long time, but only in the new conditions associated with the pandemic, the «home mode» of life in old age was fixed by law. Social isolation is considered as a risk to the life and health of the older generation. It is shown how unprecedented restrictive measures of the Government affected the psycho-emotional and physical health of elderly people, and the tasks of the state to reduce the vulnerability, ensure the safety and resilience of the elderly were not solved.

The article presents the results of two sociological studies carried out for the purpose of research of motivation of obtaining a higher education and factors of selection of a higher educational institution by foreign students, revelation of problems and elaboration of recommendations for their solution. It was revealed that foreign students in general praise obtaining a higher education, and that motivational postulates of obtaining education include not only commercial goals but cultural as well. It was established that Russian education is praised by foreign students in terms of quality, and that foreign students seek Russian education purposefully. It was found that Russia is a financially attractive country for foreign students, including employment. The study demonstrated a great significance of the website and social media of a higher educational institute for making decision on obtaining education in this higher educational institute. The results of the study showed that the level of competence in higher educational institutes of the city conforms to the requirements of foreign students and satisfies their demands maximally. At the same time several problems were revealed relating to training of foreign students: language problems; problems in training; communicational problems; social and cultural problems and social and everyday problems. Several recommendations were made to solve those problems.

The article compares the changes in the demographic situation in the Republic of Khakassia with the regional demographic development of the neighboring republics of Altai and Tyva, as well as Krasnoyarsk Krai against the background of Siberian and all-Russian trends for the period 1990-2020. A comparative analysis of the main indicators of population reproduction of these territories was carried out using the method of multi-regional demographic analysis of dynamic series based on Rosstat data. The conclusion is made about the decrease in the level of demographic security in recent years in the Republic of Khakassia, as well as the country as a whole, due first to a decrease in fertility, and then an increase in mortality against the background of the population ageing.

A modular multi-channel seismic acquisition system for exploration in mines is developed. A brief description of the seismic station is given. Circuit design solutions providing a special explosion-proof level of protection PO (Ma) are proposed.

The results of monitoring man-induced seismic activity using Ermak-5 seismic control station in the mining area of the Kalinovskaya-Vostochnaya mine are considered. Places, intensity, and causes of seismic events recorded at the depth of coal seam mining and affecting the nearby residential areas are determined.