The 50 most-cited articles in The Scientific Issues of Ternopil Volodymyr Hnatiuk National Pedagogical University Series pedagogy, 2022

The organization of the educational process with the use of digital tools is a priority of a modern higher education institution. Such tools significantly increase the effectiveness of distance learning. Teachers must use a variety of digital tools to choose the most effective means, style and format of communication with students. Google Apps enables educators to integrate digital communication and collaboration technologies into their educational activities. Padlet is one of such innovative tools, which can be used for sharing information, images, audio or video files on virtual walls. The study outlines the use of an interactive Padlet board to support learning. The main advantages of this interactive resource are accessibility, multimedia, easiness, mobility, interactivity and creativity. Examples of possible options for using the interactive Padlet board in the organization of the educational process during the teaching of the discipline “MIT in the educational process” have been considered and given. These boards can be used to gather information, communicate, work together,…

The paper reveals the problem of integration of education for sustainable development (hereinafter – ESD) in the process of professional training of future primary school teachers. The questionnaire explores the key competencies of sustainable development in future primary school teachers, including systematic thinking, prognostic, law competence, competence of teamwork, critical thinking, self-awareness, integrated problem solving. The indicators of the competencies for future primary education specialists have been determined by the authors of the research. The experimental survey included the empirical study of the level of development of competencies in the field of ESD according to the established indicators and evaluation of the overall level of their formation. The comparative analysis of the levels of the key competencies in students of the first and the fourth year of study in the specialty of “Primary Education” in order to establish the role of university education in the investigated process. The study analyses the changes achieved in teaching of sustainable development…

The article considers didactic and methodological possibilities of using PhET Interactive Simulations in the educational process. The application of electronic resources in the organization of educational and cognitive activities of students in the study of physics is proposed. Features and conditions of using computer models during the organization of the educational process are analyzed. The aim of the article is to consider the methodological possibilities and analyze the effectiveness of the use of PhET-Simulations in the study of physics. The following methods were used in the research process: theoretical – analysis, comparison, systematization and generalization of educational and methodological, popular science and applied sources on the research problem. It is argued that computer models are an effective tool for testing homework, explaining new and consolidating the previously learned material as homework or for independent work, and they play a special role during a demonstration experiment or laboratory workshop. Models become especially relevant when a real physical…

The article considers the question of boosting motivation of language specialty students during distance learning. The problem of increasing students’ motivation during distance learning is complex, completely unresolved and relevant. It is closely related to the questions of lesson organization and conducting, ways of intensifying students’ cognitive activities in the study group, the ability to provide constructive support and exchange views on different topics. The purpose of the given article is to check on the basis of the obtained practical results what means and methods can increase students’ motivation in the process of studying practical course of the German language. It is established that the crucial prerequisite for successful online learning is a conscious consideration of the motivational factor and the ability to manage it throughout the learning process. The effective factors of online lessons are indicated in the paper: well-selected and prepared material, teaching methods tested by experience and based on technical tools on various educational platforms, selected,…

Modern society requires highly qualified professionals who can quickly adapt to the development and implementation of innovative technologies, as well as to the changes that are taking place in various spheres in Ukraine and abroad. The course “Foreign Languages for Specific Purposes” (FLSP) aims at developing undergraduates’ ability to communicate in a foreign language to fulfil certain professional needs in the future. The aim of the article is to study the effective methods for developing foreign language competence in undergraduates of non-linguistic specialties in the context of distance learning. The authors have analysed the latest works of the Ukrainian and foreign scholars relevant to the topic. The concepts of “communicative competence”, “professional competence”, and “professional communicative competence” have been clarified. The authors consider foreign-language communicative competence as the undergraduates’ ability and readiness for foreign language communication with native speakers, their perception and understanding of partners, and the adequate and timely…

The importance of introducing innovative educational techniques in higher education institutions has been outlined. The essence of notions “mobile learning” and “BYOD technique” has been investigated: mobile learning is considered as a type of electronic learning when mobile devices are used with didactic purpose; the particular feature of BYOD technology is the use of personal smartphones, tablets, laptops, etc. by the participants of educational process as means of mobile learning. It has been outlined, that creation of mobile educational environment refers to competency-oriented techniques. The advantages of mobile learning over other innovative techniques have been characterized. The essence and structure of the notion of “lexicographical competency” in scientific and pedagogical literature have been analysed, author’s own interpretation of this term has been suggested, which stands for natural unity of lexicographical knowledge, abilities and skills of reproductive and creative information search activity while working with dictionaries and reference sources. The following…

The importance of the present research arises from the value that has been given – at the national, European, and international level – to the work of the teacher and the necessity of his or her professional development but also in the research gap that exists in this field. The aim of the research was to clarify the views of school principals on factors influencing their professional development. A questionnaire was administered through the Google form. The data were analyzed using the SPSS v.25. To reply to the research questions, the non-parametric Kruskal-Wallis and the Pearson coefficient were used to assess the statistical significance of the data. The sample consisted of 100 primary school principals in Greece. The results of the study showed differences in attitudes towards professional development between heads of primary education institutions with different specializations. Participants with a specialization in math and computer sciences more often supported the idea that their professional development depends on their basic studies. Those who specialized in humanities,…

The growing number of children with psychophysical development disorders and special educational needs makes it necessary to develop, implement and evaluate the effectiveness of interventions aimed at social skills development. The deficit of such skills manifests itself in violations of varying degrees of severity of communication, social interaction and social cognition and leads to disruption of social functioning in school, home and social environments, causing difficulties in learning, interpersonal relationships, behavior, and mental health. Empirical inaccuracy and a vague understanding of the social skills concept make it difficult to plan and implement interventions for their development in children with special educational needs. The purpose of the article was to reveal the essence of the concept of “social skills” and their impact on the formation of social competence of children with SEN. To achieve the goals and objectives of the study, the format of desk research was chosen. The search for information was carried out in the scientific databases Web of Science, Scopus,…

The educational process in a modern primary school involves a change in the position of the student: from the object of study they become active subjects of educational activities, which requires the activation of their self-organization. At the same time, the essence and purpose of education is not in the scholastic increase of information, but in the information support of the constant development of an individual. This problem is especially relevant in the context of distance learning in the New Ukrainian School (NUS), so increasingly popular are learning technologies aimed at enhancing the educational and cognitive activities of students and forming their readiness for independent work. Life in modern society requires that an individual develops the qualities of autonomy and organization: independence, initiative, ability to think creatively, etc. These qualities are considered as components of a single process of self-organization of an individual. Synergetic can be interpreted as a methodological basis for educational, prognostic, organizational and didactic-managerial…

The article is devoted to the problem of training a teacher of Philology by means of elective cognitive linguistic courses. On the one hand, the penetration of cognitivism in various fields of humanities, the urgent need to create a new understanding of the role of languages in the processes of cognition and comprehension of the world, the essence and functioning of the mental lexicon, including proper names, and deep relationships between history and culture, on the other hand, not less critical need for specialists ready to work in the new Ukrainian school, able to understand languages in cognitive processes, to implement a socio-cultural approach to language and speech material, determine the relevance of the proposed topic. Except for this, we also considered that nowadays, the students’ training includes the curriculum with at least 25 % of credits for elective courses, which ensures the implementation of a student-centred approach to learning. The article aimed to find out the peculiarities of the training of a teacher-philologist in the study of such elective disciplines of…

The article dwells on the results of the experimental verification of the effectiveness of the suggested methodology of developing productive grammatical competence of prospective teachers learning English after German in the process of independent work. The process of organization and the stages of the experimental teaching have been described, the obtained results have been analyzed, interpreted, and verified with the help of mathematical methods of statistics. We formulated the hypothesis, which was verified through the experimental study. The hypothesis states that the process of developing productive grammatical competence of students learning English after German will improve under the conditions of using the suggested methodology, which implies: 1) gradual development of grammatical competence in speaking and writing (preparatory, stereotypical, variational stages); 2) the possibilities for positive transfer of knowledge, skills, linguistic and learning experience from the first foreign language and the prevention of interference from the first foreign language; 3) the…

The conditions of formation of content-language integrated learning (CLIL) have been characterized with a number of theoretical and methodological factors, that have influenced the process of development from different perspectives. The origin of CLIL is connected with the prior methodological approach to second language acquisition – content based language instruction. It has been established with aim to reduce the gap in knowledge of English learners between spoken everyday English and Academic language. The reflection of the psycholinguistic views in CBI led to adoption of concepts of comprehensive output, input hypothesis and proximal zone of development in its subsidiary method (CLIL). Besides this, another methodology affecting formation of content-language integrated learning, known as “English for special purposes”, is also contextualized by specialty content, and they share common goals of learning. However, ESP keeps its focus on language, not content. The comparative analysis of CBI and ESP key features reveals the theoretical and methodological conditions of CLIL…

The article is focused is on the features of the concept of modern education and the formation of competencies in students of higher education institutions. The specifics of training a future specialist in accordance with the challenges of society are analyzed. The necessity of developing critical thinking and media literacy in general is substantiated. The relevance of the functioning of Ukrainian media literacy projects is outlined. Emphasis is placed on the positive experience of implementation of the selective discipline “Information Media Literacy” for students of pedagogical specialties at Ternopil Volodymyr Hnatiuk National Pedagogical University. We highlighted the competencies that are formed in the process of learning the elective course “Infomedia Literacy” for higher education students in the specialties of “Primary Education”, “Psychology”, “Geography”. A detailed description of the lesson on the topic “Verification of online content” is presented. The purpose of the lesson is to carry out a reasoned critical review of multimedia content, verify the authenticity of…

An important component of foreign language communicative competence of teachers who implement subject-language integrated learning (CLIL) is their professionally oriented competence in speaking, which, as evidenced by experience in teaching foreign languages in Ukraine and the world, needs improvement.The relevant research analysis also indicates the actuality of developing CLIL teachers’ linguistic competence. The research aims at substantiating a sequence of activities for the development of professionally oriented speaking skills of CLIL teachers. It has been established that the requirements for the level of language proficiency of teachers are not the same in different educational contexts and are determined in the range from level B1 to C2 according to the Common European Framework of Reference. The sequence of activities has been developed within the electronic refresher course for teachers. The necessity to ensure the development of professionally oriented speaking competence of subject teachers through formal education and self-education, in particular, via an electronic…

The article considers the issue of the organization of the educational material on Rhetoric at the final stage of learning the Ukrainian language subject in grades 10–11 of secondary schools. The present paper is focused on analyzing program requirements, implementation of program requirements in the Ukrainian language textbooks and guidelines based on changing the content of lessons on the development of coherent speech at secondary school as the basis of the final stage of learning Ukrainian – improving public speaking (monologue, dialogue, polylogue) at the lessons of Rhetoric. The definition of the concept «public speaking» has been offered as a special genre variety of speech activity indicates the ability to influence listeners in monologues, dialogues or polylogues in order to learn, persuade, encourage, enjoy aesthetic pleasure, etc. by means of speech. Planning and implementation of the study of the section «Rhetoric» is demonstrated in the Ukrainian language programs for grades 10–11 and in textbooks at the theoretical and practical levels. The programs pay attention to…

The article deals with the problem of teaching people with special needs in an inclusive educational environment of vocational schools. It becomes especially relevant in the context of Ukrainian education integrational process into the European educational context. Reforms and modernization of education, which are currently taking place as a part of social transformations, require ensuring full access to high quality education for young people with special educational needs. Reforming of the Ukrainian educational system provides establishment of an inclusive paradigm with an emphasis on educational support and adaptation of educational factors. This has led to public demand for transformation and modernization of vocational education. The lack of funding from the state is emphasized as the reason for the insufficient material and technical base of vocational schools: the inability to provide with educational facilities in accordance with the norms and standards set by public authorities, in particular for people with hearing impairments. The authors describe the effective means of…

The article deals with the methods and techniques for the development of critical thinking of primary schoolchildren, which are fundamentally different from the reproductive style of learning. The development of critical thinking of students can largely meet the requirements of modernity, namely: the content of education is considered not as a material for learning, but as a material for research; the student in this system is one of the main subjects of cooperation; the teacher, acting as an assistant, encourages students to maximum cognitive activity, maintains a creative psychological climate through co-creativity with students. It is noted that for the quality organization of the educational process and achievement of the set goals it is important to correctly apply the tools and methods of development of critical thinking. The article suggests a detailed description of the basic methods and techniques for the development of critical thinking and features of their application at primary school lessons. It is noted that the technologically correct application of methods and…

The problem of self-development of a student related to the transformation of the educational process in the post- neoclassical science is highlighted. This problem is considered in the context of a synergetic approach with the actualization of the needs and opportunities for self-organization of the applicant’s personality as a holistic characteristic of a human. It is noted that the pedagogical process of an educational institution of innovative type should be aimed at developing the abilities of the applicant, their ability to meet the challenges of the information society and self-realization in the changing conditions of the modern world. It is stated that self-development of an applicant within the synergetic paradigm of education requires a reorientation of the educational process from traditional conservative to innovative creative, in which the acquisition of vital competencies is carried out in interaction (communication) with other subjects and taking into account external (physical) and internal (mental) human activity. It is substantiated that the key aspects of the…

The object of the study is the Japan's economy, which has an upward trend after the COVID-19 pandemic. However, there are still several challenges to ensure sustainable growth and economic development. Gross Regional Domestic Product (GRDP) as an economic indicator measures the value of a country's total goods and services. There is controversy and different beliefs in economics as to whether or not a country's GRDP is positively affected. The objective of this research is to find out the most important variable which is responsible for economic progress (GRDP). The main problem which this paper will analyze is that sometimes it is difficult to understand about which factor is more important for economic growth in national and regional basis, gross domestic product, and gross regional domestic product, such as investment, government expenditure, employment, and wages. This paper analyzes investment; government expenditure and wage influence on gross regional domestic product (GRDP) for Japan in 2005 and find out the possible outcomes that are more responsible for the GRDP in the…

The object of research is the mechanization of the process of eliminating emission funnels on the earth's surface, formed as a result of explosions of shells and rockets. The problem being solved in the work is related to the military operations on the territory of Ukraine, because of which thousands of hectares of land appeared, disturbed as a result of explosions of shells and missiles, excluding their further effective use without restoration. The first step in the restoration of such lands is backfilling by means of mechanization, however, due to the different sizes of the formed emission funnels, there is no universal equipment for achieving the set goals. In the course of the work, the main types of disturbances of the earth's surface, formed as a result of the explosion of shells, represented by emission funnels in open areas, were determined. It has been established that the number of disturbed soil layers as a result of the formation of a funnel depends on its depth. Efficient methods of mechanization of backfilling of emission funnels in accordance with their parameters…

The object of research is management system of the country's economic security and the consequences of the influence of the shadow economy on it. Research is carried out on the example of Ukraine, as a country with a fairly high level of shadow processes in business. Shadow incomes and agreements are currently one of the main problems of the management system of income distribution and redistribution. The global scale of the economy and the deregulation of international mergers and acquisitions take shadow capital beyond individual countries, giving them global importance for the economic security of different countries. An analysis of the influence of the shadow economy on all stages of merger and acquisition agreements in Ukraine was carried out. The negative effects of shadowing on attracting foreign and national investments, which reduces the effectiveness of the country’s economic security management system, were analyzed. The article presents a comparative analysis of the dynamics of economic development indices of the country and the level of the shadow economy. In the…

The object of the study is samples of food powders obtained by grinding the products of the collection and processing of a number of grain crops, using air-grinding technology in an improved jet mill. One of the most important problems of the modern food industry is that for the production of flour from cereals endosperm is used while the most important nutrients are found in shells and the germ of the grain. As a result of its grinding in conventional mills, common at existing mills, large pieces of bran and a large variation in the particle size of the grinding products are obtained, and this method is energy-intensive. According to the authors, the best solution to ensure truly whole grain grinding – that is, grinding grains with shells – is air grinding in jet mills. An improved jet mill makes it possible to grind both endosperm and grain shells into flour of the same consistency. From the same amount of raw material, therefore, it is possible to produce approximately 30 % more final grinding products. It is also important that the improved jet mill, under proven conditions,…

The object of current research is efficient usage of solar energy via optimal panel orientation. Using the mathematical methods of finding extremal value of function, the software was developed to calculate the daily optimal direction of PV panel. The knowledge of daily optimal direction of PV panels enables to determine the optimal panel direction for any time of use which allows maximizing the amount of harvested solar energy. The proper functioning of this software has been confirmed by field measurements. It was found that panel optimal direction can be determined by considering only the direct solar radiation, since taking into account diffuse solar radiation of sky practically doesn’t affect optimal PV panel direction. The essential factors affecting the optimal direction of PV panel are the topography of the considered site and the significant changes of optical thickness, for example, before and after noon. The calculations also show that the partial cloudiness doesn’t remarkably affect the optimal PV panel direction, but the regular presence of clouds in same part of the…

The study examines the current state of Kazakhstan public pension system in terms of its performance and asset structure as compared to that of the OECD countries as well as structural and regulatory issues confronting the national pension market as an impediment to ensuring adequate retirement savings of the population. The underlying issue to be addressed is current low real rate of return by the national pension fund, which translates into its future inability to provide for pension payouts that would meet retirement needs of the nation accounting for recent elevated inflation rates. As a likely solution, the paper investigates the Canadian pension system as a successful case of pension market ecosystem embodying a three-layer pension market structure that fuels diversified sources of pension payouts thus ensuring a sustainable flow of pension income to Canadian retirees. In particular, it advocates for introducing group (employer-based) and private (individual) registered pension programs of investments that have for long been adopted in developed countries demonstrating their…

The paper presents the results of the influence on shrinkage deformations of the adopted composition during the drying and firing of ceramic bricks made using rice husk and ash of the combined heat and power plant of the city of Kyzylorda of the Republic of Kazakhstan. The optimal values of the husk additives content and ash from thermal power plants in the studied compositions were determined. Ash dumps from thermal power plants (TPP) create environmental tension and pose a great threat to both the environment and human health. It was found that the hydro-removal ash from the thermal power plant mainly consists of oxides of silica (45.45…46.37 %) and alumina (16.62…17.70 %), there are oxides of calcium (1.66…2.20 %), magnesium (0.86…1.12 %), iron (2.98…3.41 %) and alkali metals (0.80…1.04 %). The composition of ceramic bricks based on loess-like loam, rice husks, and ash from thermal power plants was studied. The charge composition of the raw components of the “clay, TPP ash, and rice husk” brick: clay is 71…75 %, TPP ash is 18…22 %, and rice husk is 2…6 % of the total mass of the…

Increasing demands on the quality of drilling tools are forcing us to revise the traditional methods of their production and develop new alternative technologies. Some issues related to the possibility of increasing the efficiency of a drilling tool using diamond single crystals are considered. It has been suggested that a further reserve for improving the quality of drill bits lies in the use of large, high-strength, non-magnetic diamonds. Scientific research in this area has shown that the efficiency of the drilling process largely depends on the mechanical properties of single crystals, such as tensile strength and hardness. The grains operate under a load close to critical, which can lead to the complete destruction of single crystals instead of gradual chipping with the formation of new cutting edges. The results of an experimental study of the influence of individual stages of the drilling tool manufacturing process, namely, chemical-thermal treatment and annealing at 1150°C, on the static strength of large type Ib synthetic diamond crystals with an octahedral habit are…

In today’s technological environment, it is essential to make technological advancements. This requires both men and women to have equal information, communication, and technology opportunities. Various efforts have been made to address the issue of gender equality in the workplace. It can be noted that even though equal opportunities between men and women may exist, discrimination against women is still immanent in the workplace, for example, gender bias, inequalities, and underrepresentation. Thus, the object of research is the role of information and communication technologies (ICTs) on gender equality in the workplace in today’s digital age. An empirical investigation was carried out at a selected higher education institution in South Africa. Purposive sampling was used, and 19 participants were interviewed. Mixed methods were used for this study, with the qualitative findings used in the preliminary discussions. The collected data were transcribed, coded, and analyzed using Microsoft Excel and NVIVO. The study’s findings show that ICTs play an important role in promoting gender…

The object of research is the process of chemical transesterification of palm olein with increased oxidation indicators in the presence of potassium glyceroxide catalyst. Transesterification is an important method of fat modification. The use of fats with increased oxidation indicators leads to the deactivation of common catalysts and a decrease in the efficiency of the process. There is a need to increase the dosage of catalysts, increase the process temperature, which negatively affects the product quality. An alternative transesterification catalyst (potassium glyceroxide) was used for the transesterification of palm olein with increased oxidation indicators. Palm olein (CAS Number 93334-39-5) with standard indicators was used: melting point 22.4 °C, peroxide value 0.8 ½ O mmol/kg, anisidine value 0.3 c. u. Olein was subjected to heating at a temperature of 90 °C in order to increase oxidation indicators, after which it underwent transesterification. The difference in melting points of the initial and transesterified palm olein was used as a parameter of process efficiency. The…

the quasi-static problem is discussed. The equations of the incremental theory of plasticity are used to describe fast deformation. The numerical simulation method is implemented based on the use of the Arbitrary Lagrange-Euler (ALE) approach, in which the sequence of boundary value problems in the current configuration of the solid is solved using the Finite Element Method. An axisymmetric finite element of a triangular cross-section was used for modeling. The main system of equations is presented, which, when using the Finite Element Method, describes the deformation of axisymmetric bodies in the current configuration. At each stage of the calculation in the current configuration, the initial problem is solved numerically using the finite difference method. When the limiting value of the strain tensor components is reached, according to the ALE algorithm, the finite element model is rebuilt with the implementation of new boundary conditions. To build a computational model, the RD program was used, in which a two-dimensional model of a section of an axisymmetric body is surrounded…

Among modern unmanned aerial vehicles, a special place is occupied by hybrid multicopters, in which internalcombustion engines are used along with electric motors to create lift. They can carry a larger load for a longertime. But the combination of a more powerful engine with less powerful ones, the variability of the inertialcharacteristics during the flight, significantly complicate the dynamics of such an object and its control. Therefore,there is almost no practical experience in operating such devices, which is the motivation for research anddevelopment in this area. The article deals with a helicopter-type multicopter with five electric motors (4+1 on thetail) and a central internal combustion engine. A mathematical description of the dynamics and kinematics of the apparatus has been created for the purpose of computer simulation of a controlled flight. The description takes intoaccount all internal dynamic factors and is given simultaneously with respect to the inertial and associatedcoordinate systems, which simplifies the solution of the flight control problem as much as…

The work describes the process of assessing the static and dynamic strength of the rotor of an axial smoke exhauster with twin blades which allow significantly increasing its efficiency. To build a calculation model for the strength analysis, the geometric model was simplified by removing bolted connections, slicing small surfaces, as well as modeling welds in the form of roundings and chamfers. Such simplifications made it possible to build a high-quality finite-element mesh with the sufficient accuracy for performing engineering calculations. Calculation models include a finite-element model of one sector of cyclic symmetry of the impeller of the smoke exhauster, which is used to more accurately determine its stress-strain state and local maximum stresses in the places of their concentration in the root sections of the blades and in the places where they are connected by jumpers due to the action of centrifugal forces, aerodynamic loads on the blade and thermal loads due to wheel heating, as well as a finite-element model of the entire rotor with a less detailed meshing of the…

A methodological and software tool was developed for the effective assessment of the properties of three-dimensional composites of the matrix type and periodically structured composite materials using modern methods of boundary and finite elements. Continuum mechanics models have been modified to adequately describe the behavior of composites, numerical simulation models and software have been adapted to these models for solving static problems and problems in the frequency domain. The novelty, advantages and efficiency of the developed computer technology are provided by theoretically grounded models for the analysis of composites of three-dimensional configuration with non-canonical particle shapes, improvement of modern boundary and finite element methods and coupled algorithmic schemes to achieve high accuracy of calculation analysis; suitability for the analysis of both static and dynamic elastic fields in the considered structures. Calculation models and software tools have been developed that allow to take into account special forms of individual and interacting…

The mechanism of propagation of longitudinal dynamic stresses in a conveyor belt, the material of which corresponds to the Maxwell model of an elastic element, is considered. The features of the occurrence of longitudinal vibrations in the material of the conveyor belt for the section of the transport system equipped with asynchronous motors are considered. It is shown that the acceleration of the conveyor belt occurs as a result of an abrupt change in the traction moment of the asynchronous electric motor when the power consumption of the conveyor section changes. The process of acceleration/deceleration of the conveyor belt is periodic and is determined by the uneven distribution of material along the transport route. This imposes additional restrictions on the synthesis of algorithms for optimal control of the conveyor belt speed. Accounting for uneven distribution of material along the transport route is based on an analytical PiKh-model of the conveyor section. To analyze the longitudinal vibrations in the conveyor belt section of the transport system, the wave equation is…

Woven composite materials are increasingly being used in various fields of modern technology. Unlike composites reinforced with straight fibers, they have a higher shear stress loading strength and improved impact strength characteristics. Woven composites have good technological properties. Blanks with carbon or glass fabrics are well laid out on tooling in the manufacture of thin-walled structural elements of complex shapes. The technological advantages of woven composite materials have determined the economic feasibility of their widespread use in the aviation industry and the automotive industry. The paper presents a numerical method for identifying the elastic and strength characteristics of woven carbon fiber based on the results of a micromechanical analysis of a representative volume based on the known properties of the matrix and fibers. Numerical experiments on uniaxial tension in the x, y, and z axes directions have been carried out. Modeled shift in three coordinate planes. The strength characteristics of the representative volume of the composite under conditions of…

There have been considered solving direct problem of deforming of isotropic, elastic and hingedly supported beam of finite length. A roller moving at a constant speed along the axis of the beam acts on the beam. The roller has a cylindrical shape of a certain radius and a length that is greater than or equal to the width of the beam. The differential equations of beam motion are analyzed from the point of view of the influence of their components and especially the right-hand parts of the equations on the dynamic behavior of the beam in the case of using certain common materials of the beam and roller, and an option to reduce the equations to a more simplified form is proposed. The unknown functions included in the equations are sought in the form of Fourier series. This allows us to reduce the original equations to ordinary differential equations, which are solved using the Laplace transform. Expressions for coefficients in Fourier series are found using operational calculus and the residue theory. The results of the first numerical experiment on the study of the influence of the…

The article presents the results of determination of the loading of a removable module for transportation of long freight in a combined train by the train ferry. The article describes the results of the mathematical modelling of the dynamic loading on a removable module placed on the flat car during rolling motion of the train ferry. It suggested that the flat car was rigidly fastened and displaced together with the deck. The displacements of the removable module relative to the flat car frame and the freight relative to the removable module were neglected. The mathematical model was solved with the method of variation of constants and confirmed by means of calculation in Mathcad. It was found that the maximum value of acceleration to the flat car with the removable module was about 2.35 m/s2 (0.24g). The value of acceleration obtained was included in the strength calculation for the removable module. The calculation was based on the finite element method and realized in SolidWorks Simulation with the Mises criterion. The finite element model was formed with spatial isoparametric…

The object of this study is an effective approach to designing automatic control systems with a model of complex technological processes, which include interrelated and complementary stages from the formulation of the task to the implementation of the control system at the facility. It includes a set of measures, starting with the analysis of the process in its hardware design with the construction of an information and logical scheme to the development of all types of security and commissioning. The main problem in the implementation of a control system with a technological process model is the limited ranges of adequacy of mathematical models. Therefore, when changing the load on the unit, changing external and internal perturbations, it is necessary to constantly ensure the necessary level of adequacy of the models. It is proposed to use a combined model as a mathematical model of the control object, combining the advantages of analytical and experimental-statistical models. This makes it possible to significantly expand the information base of the resulting model. A simple and…

The object of this study was the concrete structures of a chemical enterprise for the production of titanium dioxide. In this case, the ore is decomposed with sulfate acid according to the sulfate production technology. In an aggressive environment, chemical corrosion of concrete occurs, prolonged over time. Using X-ray diffraction and X-ray fluorescence analysis methods, the mineral composition of two prototypes of concrete was determined. It was found that the sample obtained from the workshop for processing ore with sulfate acid showed an increased content of sulfur oxide (SO2) on the surface, by 33 %, with a reduced content of carbonates (CaCO3) on the surface, by 52.9 %, at a depth of 2 cm – by 53.65, compared to another (control) sample. At the same time, iron oxide (Fe2O3) was found on the surface in a sample of concrete from the ore storage room (control), the content of which decreased by 10.4 % at a depth of 2 cm, and by 12.4 % at a depth of 4 cm. The results of electron microscopy show sulfur crystals on the surface of a concrete sample. It was also found that the…

The search for effective modifiers of the structure of densely baked cordierite ceramics to reduce the firing temperature is a relevant task but typically requires a large amount of experimental research. The object of this study is the reaction of the formation of the cordierite phase with the participation of glass components of the eutectic compositions of the MgO– Al2O3–SiO2 system under low-temperature firing conditions. In this case, thermodynamic analysis was used as a tool to assess the probability of chemical reactions. Thermodynamic analysis can significantly reduce the volume of the experimental sample. This paper reports the results of theoretical and experimental studies into the features of the course of chemical reactions with the participation of glass components of eutectic compositions of the MgO–Al2O3–SiO2 system. It was revealed that once the stoichiometric ratio is maintained, the resulting product of the interaction between the components of eutectic glasses of the MgO–Al2O3–SiO2 system with charging components is cordierite. Changes in the mineralogical…

Corrosion in API 5L steel under 1M HCl is a common issue; hence, creating a more effective and naturally-based inhibitor is critical. In this research, Syzygium Cumini leaf extract (SCLE) was used as a new green corrosion inhibitor under acidic conditions. The inhibition properties of the novel cumini extract were thoroughly characterized using potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), Fourier-transform infrared spectroscopy (FTIR), and atomic force microscope (AFM). The results show that the cumini inhibitor has excellent corrosion inhibition with 93 % inhibition efficiency. The adsorption behavior of the inhibitor follows the Langmuir Adsorption Isotherm due to the nearness of R2 to unity. The potentiodynamic and electrochemical measurements demonstrate the mixed type of corrosion inhibitor. Thermodynamic calculation of ΔGads is – 18.41 kJ mol-1 showing the physical adsorption process between the inhibitor and metals. Further inspection of ΔHads at ‒58.93 kJ mol-1 considers releasing energy during adsorption. The FTIR results agree with the…

To investigate nonlinear bending of the functionally graded (FGM) plates with complex shape and resting on elastic foundation a variational-structural method (RFM) is proposed. Mathematical statement of nonlinear boundary value problems of plate bending is carried out in the framework of the classical geometrically nonlinear plate theory. To solve a sequence of linear boundary value problems obtained as a result of the linearization of the original nonlinear system of equations by the method of successive loadings and the Newton method, the method of R-functions was applied. Testing, as well as comparison of the obtained results with the results of other authors, made it possible to establish the reliability and effectiveness of the developed approach and apply it to study the stress-strain state (SSS) of thin plates with complex shape. A computational experiment was carried out for thin hexagonal plates with mixed boundary conditions for various types of external load and elastic foundation characteristics. The relationship between the greatest deflection of the plate and the load…

This work research object was fat systems interesterification biotechnology using the Lipozyme TL IM immobilized enzyme preparation. The problem of enzyme preparation activation by moistening with sodium bicarbonate aqueous solution with 7.4 ... 7.7 (3 % wt.) pH was solved in the work. The obtained results made it possible to minimize the interesterification process duration with high-quality product obtaining. The proposed enzyme preparation processing made it possible to reduce the duration of the biointeresterification process in a model fat mixture (palm stearin, coconut and soybean oils in a ratio of 1:1:1, respectively) to 3.5...3.7 hours. The product with high quality indicators, namely up to 0.26 mg KOH/g acid number, up to 0.60 mmol ½ O/kg peroxide number and 1.70 c.u. anisidine number, was obtained as a result. The obtained data can be explained by a fact that effective biocatalysis with lipolytic enzymes as the protein molecules requires the existence of two phases – lipid and water. This fact was provided by the activation parameters justified in the study. The obtained…

The object of research is the processes of interaction of components of the strategic portfolio of development of telecommunications enterprises, which are subject to the principles of economic security and highlight risk management measures, in terms of overcoming the negative consequences of any changes, conflicts, crises, management problems, and stresses from external influences on the development of telecommunications enterprises. One of the most problematic areas is to determine the actual risks of strategic development of telecommunications enterprises caused by threats and challenges due to the war in Ukraine, which resulted in the destruction of infrastructure, reconstruction works, demining, migration of personnel, reduced solvency of the population, investment risks. This requires an adequate response to preserve positions or minimize destruction. At the same time, an important task is the formation of strategic imperatives for the economic security of telecommunications enterprises. In addition, it is important not only to establish a list of such components, but also to…

The object of this study is wastewater from chloride and sulfate etching operations. This paper reports results of research on ways to reduce the consumption of chemical reagents in wastewater treatment systems from etching operations. Spent etching solutions are subject to regeneration with return to the production process and partial dosing to the main stream of wastewater. It was found that at a ferrum concentration of 30 g/l in etching solutions, the solution must be treated with an alkaline reagent (10–20 % NaOH) to pH=3.5–4.0 in order to return to the technological process. In this case, the final concentration of ferrum is 11 g/l. The use of hydrogen peroxide (20–40 % H2O2) together with the alkaline reagent makes it possible to increase the degree of extraction by 30 %, that is, the final concentration of ferrum is 8 g/l. When discharging 1 m3 of etching solutions, 0.5 m3 is subject to regeneration and, after mixing with 0.5 m3 of the commercial reagent (HCl) it returns to the technological process. Commercial acid consumption is reduced by 50 %. It was shown that the use of…

This paper reports medical and biological studies of semi­finished meat product and meat­containing semi­smoked sausage on laboratory rats. The purpose of the study was to investigate the effect of the developed products on the dynamics of live weight, the state of internal organs and tissues, general and biochemical parameters of the blood of animals when they are introduced into the standard diet in the amount of 30 %. The studies were conducted on 30 white nonlinear rats weighing 145–150 g, of which one control and two experimental groups were formed, according to the principle of the method of analog groups.It is proved that the introduction of meat­containing multicomponent products with a high protein content into the diet of rats in the amount of 30 % of the standard diet contributes to the intensification of animal growth processes. It was confirmed that the increase in live body weight of rats after 21 days of the experiment amounted to 33–38 %, which is larger than that in control by 69–90 %. No negative impact on the state of the internal organs of rats from the…

An issue related to using wood and timber for building structures is to ensure the stability and durability during operation within wide limits. Therefore, the object of research was the inhibition of the process of water absorption of pine and hornbeam wood during a thermal change in its structure. It is proved that in the process of thermal modification of wood, its structure changes, and, accordingly, water absorption. Namely, the maximum increase in mass under the action of water on an untreated sample of wood was more than 40 %, after thermal modification – less than 35 %. The increase in the mass of wood samples thermally modified and treated with a hydrophobic agent was less than 25 %. On the basis of the obtained results of physicochemical studies, discrepancies were found in the IR spectra of wood, both during thermal modification and with additional treatment with a hydrophobic agent, indicating structural changes in the components. In particular, the decrease or absence of the intensities of the absorption bands of some functional groups and the appearance or…

The numerous cases of deformation of technogenic objects in the transport industry under increasing axial loads and speeds of motion aggravate the need to solve the problems of early recognition of the nature and causes of deformations of structural elements. The need for this is due to the fact that destructions and accidents, resulting from deformation processes, cause enormous economic, social and environmental damage, incomparable with the funds spent on protective measures. The object of the study in the article is a railway trestle, consisting of two spans of a ribbed reinforced concrete beam. Determination of the residual resource in terms of bearing capacity and load-carrying capacity of the railway trestle is the main task. The authors have obtained bending deformations (stresses), frequencies of natural vibrations and operating modes of structures of railway trestle spans. The damage degree of the railway overpass spans structures may also be judged by the deviation of the calculated values of the amplitude-phase-frequency characteristics (AFFR) from the standard values.…

This paper considers the construction of a mathematical model of the movement of an autonomous mobile robot (AMR) in variable configuration, taking into account the relationship of the dynamic parameters of a mechanical system. As an example, the design of AMR with a manipulator is considered. The object of this study is the dynamics of AMR with a manipulator. The peculiarities of the dynamics of AMR with the manipulator are due to the change in the position of the center of mass of the system with the relative movement of the manipulator and the commensurate non-diagonal and diagonal elements of the inertia tensor calculated relative to the axes of the base coordinate system. The construction of the mathematical model was carried out according to the Nyton-Euler method. The resulting mathematical model contains: – an equation of motion of the center of mass of the AMR system of variable configuration along the trajectory in the inertial coordinate system; – an equation of angular motion of AMR in variable configuration in the inertial coordinate system; – an equation of motion of…

The object of this study is snack technologies for various types of gluten-free breading for "Fast food" ERI format. It has been determined that snacks are gaining more and more demand in restaurants of the "Fast food" format. From the point of view of a balanced diet, snack products for fast food are rich in cholesterol with increased amounts of sugar, salt, and gluten protein. In the course of technological testing, components for dry breading were selected: rice flour, extruded oatmeal and corn flakes, sesame seeds. For the manufacture of snacks, the main raw material was chosen – shrimp meat, poultry, soft cheese "Brie". To give the snacks more refined and rich tastes, spices were used: turmeric and ground paprika. For the most part, the technologies are designed for freezing and subsequent heat treatment (deep-frying). According to this, the specificity of the development of two-layer breading was investigated, namely the development of the "Klyar" semi-finished product and dry breading. The composition of the "Klyar" semi-finished product includes cold-swollen starch "Cold…

The object of research is the internal structure of management in universities. The research problem is to confirm the causal relationship between management and rating. Higher education is one of the most important indicators of the level of development of the state. That is why many countries of the world attach great importance to the issue of the quality of higher education. Different international and national university ranking systems of universities were created to reflect the quality of education in the corresponding higher educational institutions. Currently, university ranking includes such criteria as quality of education, indicators of employment of university graduates, the demand for the graduates in the labor market, the symbiosis of science, education and business, and mobility of students. These indicators are a direct result of effective management in universities. Based on this hypothesis, the paper makes an assumption about the possibility of clustering universities in the Republic of Kazakhstan in order to determine the effectiveness of management. The authors…