Leading research directions are defined on the basis of self-analysis of the study results on the use of cloud technologies in training by employees of joint research laboratory “Сloud technologies in education” of Kryvyi Rih National University and Institute of Information Technology and Learning Aids of the NAES of Ukraine in 2009-2018: cloud learning technologies, cloud technologies of blended learning, cloud-oriented learning environments, cloud-oriented methodological systems of training, the provision of cloud-based educational services. The ways of implementation SaaS, PaaS, IaaS cloud services models which are appropriate to use in the process of studying the academic disciplines of the cycles of mathematical, natural science and professional and practical training of future specialists in information technology are shown, based on the example of software engineering, computer science and computer engineering. The most significant advantages of using cloud technologies in training of future information technology specialists are definite, namely, the possibility of using modern parallel programming tools as the basis of cloud technologies. Conclusions are drawn; the direction of further research is indicated: designing a cloud-oriented learning environment for future specialists in computer engineering, identifying trends in the development of cloud technologies in the professional training and retraining of information technology specialists, developing a methodology for building the research competencies of future software engineering specialists by using cloud technologies.

The coefficient of ultrasound attenuation is noted for sufficient sensitivity to provide high-quality characteristics of rocks. Efficiency of transforming electromagnetic signals into elastic oscillations of the ferromagnetic rock and backward depends on magnetic permeability of the rock, i.e. the content of the ferromagnetic component. The suggested method enables receiving additional data on concentration and structure of the ferromagnetic component distributed in the rock. To use the method one does not need either borehole liquid or any specific devices to introduce elastic oscillations into the rock, this fact facilitating its extensive application.

Погіршення якості концентратів в основному відбувається внаслідок утворення мікронних техногенних зростків. Запропоновано використання високоенергетичного ультразвуку в кавітаційному режимі для очищення поверхонь мінералів. Доведено, що ефективність ультразвукової обробки пов'язана з оновленням поверхонь часток, що призводить до збільшення контрастності магнітних і флотаційних властивостей мінералів. Виконано розрахунок пристрою формування високоенергетичного ультразвуку Ключові слова: ультразвуковий вплив, очищення мінералів, залізна руда, кавітаційний режим, техногенні зростки Ухудшение качества концентратов в основном происходит в результате образования микронных техногенных сростков. Предложено использование высокоэнергетического ультразвука в кавитационном режиме для очистки поверхностей минералов. Доказано, что эффективность ультразвуковой обработки связана с обновлением поверхностей частиц, что приводит к увеличению контрастности магнитных и флотационных свойств минералов. Выполнен расчет устройства формирования высокоэнергетического ультразвука Ключевые слова: ультразвуковое воздействие, очистка минералов, железная руда, кавитационный режим, техногенные сростки

The modern development of science and technology has provided high quantity of information. This information must be systemized and classified. For taxonomization of educational materials, it was proposed to use existing graph-generators and graph-visualizers of the TODOS IT platform. A separate aspect of the TODOS IT platform is the possibility of using a centralized web-oriented learning environment. Creation of the system and transdisciplinary knowledge is a problem of modern education, which can be solved by creating a centralized web-oriented educational environment. Using this approach is an important part of the learning process. Such a centralized web-oriented environment based on the ontological approach involves filling, adaptive educational services with information resources that reflect the conceptual system of a particular discipline.One of the systems providing not only collection of information but include its systemizing is centralized web-oriented educational environment based on Ontology4 system. Ontology 4 use elements of the TODOS.The paper presents specific developments of one centralized web-oriented educational environment can be used to teach different subjects such as biology, chemistry, Ukrainian language and literature, using the STEM approach.

Using of new learning and IC technologies is necessary for effective learning of modern students. Their specific educational needs are: using of mobile ICTs, collaboration, challenging tasks and entertainment. Appropriate learning environment should be created to satisfy all these demands. It ought to deal with cloud-based technologies (for 24/7 access, individual and group work according to a personal schedule), augmented reality (for creating of firm links between real and virtual objects), content and language integrated learning (for immersion in an additional language and creation challenging groups and personal tasks in language and non-language subjects). Using these technologies in complex provides social and ICT mobility and creates positive conditions for developing 9 of 10 key competencies. The paper deals with the features, problems and benefits of technologies’ implementation in secondary schools. To sum up, in spite of all difficulties, this environment helps students to get some practical experience in using foreign languages and understanding abstract nature concepts; to develop language and research competencies and to remain motivated (and self-motivated) in learning Science and English.

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The research deals with metal extraction from off-grade ores and concentration tailings. There are provided results of simulating parameters of reagent leaching of metals in the disintegrator according to the metal recovery ratio. The research substantiates the method of waste-free processing of chemically recovered ores. Recovery of metals into solution is the same both under multiple leaching of tailings or ore in the disintegrator and agitation leaching of tailings or ore previously activated in the disintegrator with leaching solutions. The time of agitation leaching is more by two orders of magnitude than that of the disintegrator processing. Recovery of metals into solution is most affected by the content of sodium chloride in the solution. Then, in decreasing order, go the content of sulfuric acid in the solution, the disintegrator rotor rpm and L:S ratio.

The research is intended to investigate and synthesize adaptive control over drilling by identifying parameters of an object model under non-stationarity conditions. Methods. Under conditions of rapidly changing borehole drilling indices, a two-level adaptive control strategy is applied, combining investigation of drilling and its control. The structure of the control system includes an additional block of forming the model on the basis of data on indirect features. Findings. The research develops a method for seeking the extremum developed for the object whose dynamics is described by a first-order linear differential equation. The method allows to determine the value of the output signal by evaluating the initial phase of the transient process caused by the changed input signal for a set step. Originality. The suggested algorithm of noise-free identification makes it possible to assess the factor of the control object transfer under the action of random disturbances. The data obtained is used to adjust the gain factor of the controller in the closed loop automatic control system of drilling. Practical implications. The suggested structure and algorithm of drilling control allow enhancing drilling efficiency by ensuring relevant mechanical drilling rates through defining corresponding rotation speeds and axial loads of a drilling tool.