Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.4.74-79
T. Man'ko, K. Siedachova, Khrystyna Kozis
Purpose To improve the physical and mechanical characteristics of the epoxy composition, reduce energy consump-tion, cost, reduce production areas, as well as protect the environment, for the hardening thin-walled structures made of polymer composite materials, it is necessary to choose the most rational method for curing polymer composite materials. Methodology The prepared samples of the epoxy binder ЭДТ-10+УП606/2(1%) with a size of 10х10х10 mm, were hardened by convective, IR heating, and selective IR heating according to specified modes. IR heating is provided by unit with three halogen incandescent lamps type КГТ-220-1000-1 inside and using a salt filter. The mode of composition hardening according to three technologies has been developed. Findings The results of measurements of the cured samples showed that the highest microhardness was achieved using selective IR heating. Metallographic studies has shown that polymer obtained a compact structure with a high degree of hardening, approximately 97%. Hardened samples of ЭДТ-10 epoxy binder were subjected to mechanical tests. Having determined the microhardness, it was found that during the selective hardening of the ЭДТ-10 binder, the microhardness was 34,57 kgf/mm2, IR heating - 30,85 kgf/mm2, convective heating – 29,61 kgf/mm2. Originality To obtain the maximum specific power from the IR emitter, salt filters were used, in which the main part of the emitted energy fell on the wavelength (2,8 – 3,2)•10-6 м. This technique allows you to select the necessary frequency bands. Practicalvalue The results of epoxy composition samples hardening experiment showed that the hardening process by the IR heating selective method takes 1 hour and 15 minutes, in contrast to convective heating which requires at least 7 hours and IR heating with 2 hours and 30 minutes. The selective method provides a uniform temperature distribution over the entire surface to be treated, which ensures high physical and mechanical characteristics. Conclusions On the basis of experimental researches with help selective method IR of hardening samples from PCM have been received on the basis of epoxy binding which possess high mechanical durability and compact structure in comparison with a composition which hardening a traditional convection heating.
{"title":"SELECTIVE METHOD OF CURING EPOXY BINDERS FOR THE CREATION OF THIN-WALLED HIGH- STRENGTH STRUCTURES","authors":"T. Man'ko, K. Siedachova, Khrystyna Kozis","doi":"10.30929/1995-0519.2021.4.74-79","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.74-79","url":null,"abstract":"Purpose To improve the physical and mechanical characteristics of the epoxy composition, reduce energy consump-tion, cost, reduce production areas, as well as protect the environment, for the hardening thin-walled structures made of polymer composite materials, it is necessary to choose the most rational method for curing polymer composite materials. Methodology The prepared samples of the epoxy binder ЭДТ-10+УП606/2(1%) with a size of 10х10х10 mm, were hardened by convective, IR heating, and selective IR heating according to specified modes. IR heating is provided by unit with three halogen incandescent lamps type КГТ-220-1000-1 inside and using a salt filter. The mode of composition hardening according to three technologies has been developed. Findings The results of measurements of the cured samples showed that the highest microhardness was achieved using selective IR heating. Metallographic studies has shown that polymer obtained a compact structure with a high degree of hardening, approximately 97%. Hardened samples of ЭДТ-10 epoxy binder were subjected to mechanical tests. Having determined the microhardness, it was found that during the selective hardening of the ЭДТ-10 binder, the microhardness was 34,57 kgf/mm2, IR heating - 30,85 kgf/mm2, convective heating – 29,61 kgf/mm2. Originality To obtain the maximum specific power from the IR emitter, salt filters were used, in which the main part of the emitted energy fell on the wavelength (2,8 – 3,2)•10-6 м. This technique allows you to select the necessary frequency bands. Practicalvalue The results of epoxy composition samples hardening experiment showed that the hardening process by the IR heating selective method takes 1 hour and 15 minutes, in contrast to convective heating which requires at least 7 hours and IR heating with 2 hours and 30 minutes. The selective method provides a uniform temperature distribution over the entire surface to be treated, which ensures high physical and mechanical characteristics. Conclusions On the basis of experimental researches with help selective method IR of hardening samples from PCM have been received on the basis of epoxy binding which possess high mechanical durability and compact structure in comparison with a composition which hardening a traditional convection heating.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133761127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.11-17
Kateryna Shevelko, O. Bespartochna, T. Haikova
Purpose. To consider the concept of independent work of students in terms of distance learning and to reveal the specifics of the organization of different typologies of independent work of students of philology by means of information technology training. Methodology. The influence of modern information technologies on the process of independent work of students of philological specialties is analyzed. The types of future specialists’ independent work are singled out. Findings. It is established that the independent work of students in learning a foreign language with the use of information technology can be organized as a system. The effectiveness of higher education depends on the extent and nature of the use of information technology, student involvement in independent work in distance learning, the ability to work and collaborate with teachers and classmates in a virtual learning environment, choosing the appropriate tools. Originality. Mastering a foreign language in the process of project work allows students to feel the pleasure of learning, attracts to a new culture with the help of information technology. The advantages of the project methodology are undoubtedly diversity, problems, learning satisfaction, which develops students' skills of independent work. Practical value. Using Modular Object-Oriented Dynamic Learning Environment, students have free access to information sources. This factor increases the effectiveness of independent work in higher education, opening new opportunities for self-expression and implementation of professional skills. Conclusions. Innovative learning technologies through independent work determine the end result, activate the learning process, stimulate interest, enable personal development, and as a result – increase language skills, promote mobility, initiative, creativity, independence of students in decision-making and, accordingly, competitiveness in the labor market. References 18.
{"title":"INDEPENDENT WORK IN THE PROCESS OF PREPARATION OF FUTURE PHILOLOGISTS IN THE CONDITIONS OF DISTANCE LEARNING","authors":"Kateryna Shevelko, O. Bespartochna, T. Haikova","doi":"10.30929/1995-0519.2021.5.11-17","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.11-17","url":null,"abstract":"Purpose. To consider the concept of independent work of students in terms of distance learning and to reveal the specifics of the organization of different typologies of independent work of students of philology by means of information technology training. Methodology. The influence of modern information technologies on the process of independent work of students of philological specialties is analyzed. The types of future specialists’ independent work are singled out. Findings. It is established that the independent work of students in learning a foreign language with the use of information technology can be organized as a system. The effectiveness of higher education depends on the extent and nature of the use of information technology, student involvement in independent work in distance learning, the ability to work and collaborate with teachers and classmates in a virtual learning environment, choosing the appropriate tools. Originality. Mastering a foreign language in the process of project work allows students to feel the pleasure of learning, attracts to a new culture with the help of information technology. The advantages of the project methodology are undoubtedly diversity, problems, learning satisfaction, which develops students' skills of independent work. Practical value. Using Modular Object-Oriented Dynamic Learning Environment, students have free access to information sources. This factor increases the effectiveness of independent work in higher education, opening new opportunities for self-expression and implementation of professional skills. Conclusions. Innovative learning technologies through independent work determine the end result, activate the learning process, stimulate interest, enable personal development, and as a result – increase language skills, promote mobility, initiative, creativity, independence of students in decision-making and, accordingly, competitiveness in the labor market. References 18.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116717901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.42-48
Tetyana Maglyovana, L. Yashchuk
Purpose. Development of methods for sorption-spectrophotometric and atomic-emission determination of hazardous toxicants in order to increase the reliability of monitoring pollution parameters and assess possible future adverse consequences for humans and the environment. Methodology. Sorption-spectrophotometric and atomic-emission determination of Cu (II), Ni (II), Cd (II), Pb (II), Al (III), Fe (III), in soils degraded due to fires, using sorbents based on silica gel, sequentially modified with polyhexamethylene guanidine and arsenazo-I salts, which can be used for simple and fast methods for the determination of heavy and transition metals. Findings. Identification of chemical pollution by heavy metals in degraded soils as a result of tegogenic activity, fires, climate change for making the necessary management decisions. Originality. Sorbents for the group extraction of heavy metal ions were obtained by the method of non-covalent modification of the silica gel surface with polyhexamethylene guanidine and a triphenylmethane sulfonyl dye. Practical value. Techniques have been developed for the sorption-spectrophotometric and atomic-emission determination of Cu (II), Ni (II), Cd (II), Pb (II), Al (III), Fe (III) using silica gel, sequentially modified with salts of polyhexamethylene guanidine and arsenazo I, which can be used for simple, rapid test methods for determining the migration capacity of heavy and transition metals in technogenically polluted ecosystems and will make it possible to make scientifically based decisions on the priority of the implementation of environmental protection measures. To determine the microquantities of the ions under study, it is advisable to use fine-grained silica gel, and coarse-grained silica gel – to determine higher concentrations of the tested ions. Сonclusions. The paper proposes methods for the group sorption - spectrophotometric determination of Cu (II), Ni (II), Cd (II), Pb (II), Al (III), Fe (III) in the main components of the environment (soil and natural waters) on based on sorbents modified with specific analytical reagents, which is one of the promising directions for increasing the sensitivity and selectivity of analysis. References 15, tables 2, figures 5.
{"title":"INFLUENCE OF FIRE IN NATURAL ECOSYSTEMS ON MIGRATIVE ABILITY OF HEAVY METALS, METHODS OF SORPTION-SPECTROPHOTOMETRIC DETERMINATION","authors":"Tetyana Maglyovana, L. Yashchuk","doi":"10.30929/1995-0519.2021.5.42-48","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.42-48","url":null,"abstract":"Purpose. Development of methods for sorption-spectrophotometric and atomic-emission determination of hazardous toxicants in order to increase the reliability of monitoring pollution parameters and assess possible future adverse consequences for humans and the environment. Methodology. Sorption-spectrophotometric and atomic-emission determination of Cu (II), Ni (II), Cd (II), Pb (II), Al (III), Fe (III), in soils degraded due to fires, using sorbents based on silica gel, sequentially modified with polyhexamethylene guanidine and arsenazo-I salts, which can be used for simple and fast methods for the determination of heavy and transition metals. Findings. Identification of chemical pollution by heavy metals in degraded soils as a result of tegogenic activity, fires, climate change for making the necessary management decisions. Originality. Sorbents for the group extraction of heavy metal ions were obtained by the method of non-covalent modification of the silica gel surface with polyhexamethylene guanidine and a triphenylmethane sulfonyl dye. Practical value. Techniques have been developed for the sorption-spectrophotometric and atomic-emission determination of Cu (II), Ni (II), Cd (II), Pb (II), Al (III), Fe (III) using silica gel, sequentially modified with salts of polyhexamethylene guanidine and arsenazo I, which can be used for simple, rapid test methods for determining the migration capacity of heavy and transition metals in technogenically polluted ecosystems and will make it possible to make scientifically based decisions on the priority of the implementation of environmental protection measures. To determine the microquantities of the ions under study, it is advisable to use fine-grained silica gel, and coarse-grained silica gel – to determine higher concentrations of the tested ions. Сonclusions. The paper proposes methods for the group sorption - spectrophotometric determination of Cu (II), Ni (II), Cd (II), Pb (II), Al (III), Fe (III) in the main components of the environment (soil and natural waters) on based on sorbents modified with specific analytical reagents, which is one of the promising directions for increasing the sensitivity and selectivity of analysis. References 15, tables 2, figures 5.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131073859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.18-23
Olga V. Novohatko, O. Zbyrannyk, A. Pasenko
Purpose. Evaluate the efficiency of the innovation project. Methodology. It has been generalized, compared and detailed of the information on modern methods of evaluating the innovative project effectiveness by the analysis of the modern literature. Results. The innovative development of enterprises in a developed market environment is a necessary and indispensable condition for ensuring competitiveness. Achievement of high or sufficient indicators of economic efficiency of innovation is an indicator of the result obtained in the course of investing and all resources in a new product, operation or technology. The introduction and practical implementation of even a small-scale innovative project (workshop of an enterprise) will improve the main technical and economic indicators, namely, increase production by 20 % and reduce production costs by 18.75%, increase product profitability by 4.28% and a decrease in production costs by 6.14 %. Originality. Analyzed the works of domestic and foreign economists dedicated to innovative development. Modern approaches to assessing the economic efficiency of an innovative project are considered. Practical value. It is shown that one of the economic criteria, that can be used by enterprises, is the economic effeciency innovation. This criterion means that the result obtained after investing of all resources in a new product, operation or technology has a certain beneficial effect.
{"title":"EVALUATION OF ECONOMIC EFFICIENCY OF INNOVATION PROJECT","authors":"Olga V. Novohatko, O. Zbyrannyk, A. Pasenko","doi":"10.30929/1995-0519.2021.5.18-23","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.18-23","url":null,"abstract":"Purpose. Evaluate the efficiency of the innovation project. Methodology. It has been generalized, compared and detailed of the information on modern methods of evaluating the innovative project effectiveness by the analysis of the modern literature. Results. The innovative development of enterprises in a developed market environment is a necessary and indispensable condition for ensuring competitiveness. Achievement of high or sufficient indicators of economic efficiency of innovation is an indicator of the result obtained in the course of investing and all resources in a new product, operation or technology. The introduction and practical implementation of even a small-scale innovative project (workshop of an enterprise) will improve the main technical and economic indicators, namely, increase production by 20 % and reduce production costs by 18.75%, increase product profitability by 4.28% and a decrease in production costs by 6.14 %. Originality. Analyzed the works of domestic and foreign economists dedicated to innovative development. Modern approaches to assessing the economic efficiency of an innovative project are considered. Practical value. It is shown that one of the economic criteria, that can be used by enterprises, is the economic effeciency innovation. This criterion means that the result obtained after investing of all resources in a new product, operation or technology has a certain beneficial effect.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125215939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.55-61
L. Korotka
Purpose. The purpose of the work is to improve the computational methods of calculating the systems of differential equations, which describe the accumulation of geometrical defects of structures, which function in an aggressive environment. Obtaining a numerical result with predetermined flexibility requires numerical integration parameters that would ensure the required accuracy. Methodology. The calculation costs of solving the problem of predicting the lon-gevity of corrosive structures are related to this system of differential equations. In cases where the problem of optimal design is solved, then the selection of optimal parameters of numerical procedures with control over the accuracy be-comes essential. To improve the efficiency of computational methods for this class of differential equation systems, the work is suggested to use elements of the computational intellect, which are neural networks. It is suggested to use an adaptive neural network for obtaining parameters of numerical integration on the basis of fuzzy logical inference, which allows formalizing the multidimensional data used for setting up a fuzzy system. Results. This approach allows using a neuro-fuzzy network for forecasting the durability timeframe taking into account the parameters that influence it. Orig-inality. The results of numerical experiments show that the adaptive neuro-fuzzy system after the training is able to summarize the input data and propose the parameters of numerical procedures, which ensure the required accuracy of the obtained result. Numerical experiments based on the comparison of reserved data and results of network operation prove that the adaptive system can be used to improve the efficiency of calculating methods when carrying out this type of task. References 21, tables 2, figures 2.
{"title":"APPLICATION OF NEURO-FUZZY NETWORKS FOR DETERMINATION OF RATIONAL PARAMETERS OF NUMERICAL SOLUTION OF SYSTEMS OF DIFFERENTIAL EQUATIONS","authors":"L. Korotka","doi":"10.30929/1995-0519.2021.5.55-61","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.55-61","url":null,"abstract":"Purpose. The purpose of the work is to improve the computational methods of calculating the systems of differential equations, which describe the accumulation of geometrical defects of structures, which function in an aggressive environment. Obtaining a numerical result with predetermined flexibility requires numerical integration parameters that would ensure the required accuracy. Methodology. The calculation costs of solving the problem of predicting the lon-gevity of corrosive structures are related to this system of differential equations. In cases where the problem of optimal design is solved, then the selection of optimal parameters of numerical procedures with control over the accuracy be-comes essential. To improve the efficiency of computational methods for this class of differential equation systems, the work is suggested to use elements of the computational intellect, which are neural networks. It is suggested to use an adaptive neural network for obtaining parameters of numerical integration on the basis of fuzzy logical inference, which allows formalizing the multidimensional data used for setting up a fuzzy system. Results. This approach allows using a neuro-fuzzy network for forecasting the durability timeframe taking into account the parameters that influence it. Orig-inality. The results of numerical experiments show that the adaptive neuro-fuzzy system after the training is able to summarize the input data and propose the parameters of numerical procedures, which ensure the required accuracy of the obtained result. Numerical experiments based on the comparison of reserved data and results of network operation prove that the adaptive system can be used to improve the efficiency of calculating methods when carrying out this type of task. References 21, tables 2, figures 2.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129694148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-23DOI: 10.30929/1995-0519.2021.4.177-182
A. Oksanich, M. Kogdas, V. Dragobetsky, V. Bakhmat
Purpose. А study of the temperature field of the melt during the cultivation of GaAs single crystals from under a layer of liquid flux. Thermoplastic stresses were measured on plates cut from the upper, middle and lower part of the ingot of undoped GaAs.Methodology. Finite element method is used to calculate temperature profiles and internal thermoplastic stresses. The mechanism of theoretical and experimental researches which allow to predict thermoplastic stresses in the course of cultivation of ingots is offered. For the analysis and mathematical calculations of the stationary differential equation in partial derivatives and the equations of thermoelasticity, respectively, use the finite element method, the calculations were performed in the programs THERMIX and INCA. Temperature profiles and internal thermoplastic stresses were calculated. Thermoplastic stresses were measured on plates cut from the upper, middle and lower part of the ingot of undoped GaAs (cm-3) with a thickness of 1 mm with a resistivity of 108 Ohm x cm, diameter 50 mm, orientation (111).The axial temperature gradient is determined. Experimentally obtained values of ison voltage lines along the plane of GaAs plates cut from different parts of the ingot. To measure the internal (thermoplastic) stresses in the work used the method of photoelastic-guests in infrared polarized light. The integrated picture of thermoplastic stresses was obtained using the "Polaron" installation, and the point measurement with the construction of the iso-voltage line was obtained on the "Polaron-2" installation. Originality. As a result of the research it can be concluded that the mechanism of theoretical and experimental researches is offered in the work, which allows to predict thermoplastic stresses in the process of growing GaAs ingots and, finally, to develop a procedure for reducing dislocation density in GaAs ingots. The practical value. the proposed method will improve the technology of growing ingots of gallium arsenide with a more homogeneous technology, which will be a good indicator for the future creation of gas sensors from this material.
{"title":"DEVELOPMENT OF A METHOD FOR DETERMINATION OF THERMOPELASTIC STRESSES IN GAAS PLATES","authors":"A. Oksanich, M. Kogdas, V. Dragobetsky, V. Bakhmat","doi":"10.30929/1995-0519.2021.4.177-182","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.177-182","url":null,"abstract":"Purpose. А study of the temperature field of the melt during the cultivation of GaAs single crystals from under a layer of liquid flux. Thermoplastic stresses were measured on plates cut from the upper, middle and lower part of the ingot of undoped GaAs.Methodology. Finite element method is used to calculate temperature profiles and internal thermoplastic stresses. The mechanism of theoretical and experimental researches which allow to predict thermoplastic stresses in the course of cultivation of ingots is offered. For the analysis and mathematical calculations of the stationary differential equation in partial derivatives and the equations of thermoelasticity, respectively, use the finite element method, the calculations were performed in the programs THERMIX and INCA. Temperature profiles and internal thermoplastic stresses were calculated. Thermoplastic stresses were measured on plates cut from the upper, middle and lower part of the ingot of undoped GaAs (cm-3) with a thickness of 1 mm with a resistivity of 108 Ohm x cm, diameter 50 mm, orientation (111).The axial temperature gradient is determined. Experimentally obtained values of ison voltage lines along the plane of GaAs plates cut from different parts of the ingot. To measure the internal (thermoplastic) stresses in the work used the method of photoelastic-guests in infrared polarized light. The integrated picture of thermoplastic stresses was obtained using the \"Polaron\" installation, and the point measurement with the construction of the iso-voltage line was obtained on the \"Polaron-2\" installation. Originality. As a result of the research it can be concluded that the mechanism of theoretical and experimental researches is offered in the work, which allows to predict thermoplastic stresses in the process of growing GaAs ingots and, finally, to develop a procedure for reducing dislocation density in GaAs ingots. The practical value. the proposed method will improve the technology of growing ingots of gallium arsenide with a more homogeneous technology, which will be a good indicator for the future creation of gas sensors from this material.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131026722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-23DOI: 10.30929/1995-0519.2021.4.163-168
I. Velyt
Purpose. The paper considers peculiarities of using artificial illumination sources with effective spectral composition of radiation for conditions of closed soil. Methodology. High-intensity sodium lamps (DNaT400), high- intensity sources with composition of sodium amalgam with cesium additives were investigated (Hg-20%, Na-7 5%, Cs-5%), potassium (Hg-20%, Na-79%, K-1%). Results. As a result of experiments, it was determined that the spectral radiation composition of lamps with additives Cs, K, Rb has a lower radiation intensity compared to standard high pressure sodium lamps (DNaT) in the region of 500-600 nm and significantly higher intensity in red (600-700 nm) and near infrared regions. The physicochemical properties of the sodium-cesium-mercury system have been studied. Melting points of ternary alloys, thermodynamic properties of melts of ternary system Na-Cs-Hg and double system of Na-Hg system are determined. The parameters of batch pressures of component vapors are calculated. The composition of the discharge tube amalgam is selected, in which the ratio of sodium and mercury concentrations is close to the corresponding ratio in a standard sodium lamp, and cesium additives vary in the range from 5 to 10 atm. %. The influence of cesium content in amalgams on light and color parameters of lamps is considered. Tomatoes were used in the experiment, which were additionally illuminated with lamps DNaT400, high intensity discharge tube filled light sources (20at.% Hg, 77at.% Na, 3at.% Cs20); (20at.% Hg, 75at.% Na, 5at. % Cs); (20 at. % Hg, 73 at. % Na, 7 at. % Cs); (20 at. % Hg, 70 at. % Na, 10 at. % Cs). Originality. In the use of high-pressure sodium lamps with a filling of the discharge tube in different weight ratios of Hg, Na, Cs. Practical value. When using high-intensity light sources with additives Cs having amalgam composition (20 at.% Hg, 75 at.% Na, 5 at.% Cs), growing tomato plants in the early stages of development is most effective. The total content of chlorophyll in tomatoes when irradiated with a high- pressure sodium lamp with cesium additives is 1.4 ÷ 2.5 times higher than when irradiated. DNaT400.
{"title":"IRRADIATION OF VEGETABLES UNDER CONDITIONS OF CLOSED GROUND WITH LIGHT SOURCES WITH EMITTING ADDITIVES","authors":"I. Velyt","doi":"10.30929/1995-0519.2021.4.163-168","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.163-168","url":null,"abstract":"Purpose. The paper considers peculiarities of using artificial illumination sources with effective spectral composition of radiation for conditions of closed soil. Methodology. High-intensity sodium lamps (DNaT400), high- intensity sources with composition of sodium amalgam with cesium additives were investigated (Hg-20%, Na-7 5%, Cs-5%), potassium (Hg-20%, Na-79%, K-1%). Results. As a result of experiments, it was determined that the spectral radiation composition of lamps with additives Cs, K, Rb has a lower radiation intensity compared to standard high pressure sodium lamps (DNaT) in the region of 500-600 nm and significantly higher intensity in red (600-700 nm) and near infrared regions. The physicochemical properties of the sodium-cesium-mercury system have been studied. Melting points of ternary alloys, thermodynamic properties of melts of ternary system Na-Cs-Hg and double system of Na-Hg system are determined. The parameters of batch pressures of component vapors are calculated. The composition of the discharge tube amalgam is selected, in which the ratio of sodium and mercury concentrations is close to the corresponding ratio in a standard sodium lamp, and cesium additives vary in the range from 5 to 10 atm. %. The influence of cesium content in amalgams on light and color parameters of lamps is considered. Tomatoes were used in the experiment, which were additionally illuminated with lamps DNaT400, high intensity discharge tube filled light sources (20at.% Hg, 77at.% Na, 3at.% Cs20); (20at.% Hg, 75at.% Na, 5at. % Cs); (20 at. % Hg, 73 at. % Na, 7 at. % Cs); (20 at. % Hg, 70 at. % Na, 10 at. % Cs). Originality. In the use of high-pressure sodium lamps with a filling of the discharge tube in different weight ratios of Hg, Na, Cs. Practical value. When using high-intensity light sources with additives Cs having amalgam composition (20 at.% Hg, 75 at.% Na, 5 at.% Cs), growing tomato plants in the early stages of development is most effective. The total content of chlorophyll in tomatoes when irradiated with a high- pressure sodium lamp with cesium additives is 1.4 ÷ 2.5 times higher than when irradiated. DNaT400.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114679696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-23DOI: 10.30929/1995-0519.2021.4.55-60
I. Yunyk
Purpose. Of the article is to highlight the correlational interdependence of the concepts "university brand" and "professor’s brand". Methodology. In course of research the following methods were used: analysis and synthesis, in- duction and deduction, extrapolation and modeling of the initial provisions of psychological and pedagogical science. Results. The field of higher education in Ukraine is dominated by the Eastern (Asian) approach to branding, which is characterized by the creation and promotion of the corporate brand of higher education as a direct guarantee of success of professor’s brands as its subbrands. In turn, the success of branding initiatives by professors of universities act solely as a direct result of branding of the whole institution, which leads to total disregard of the need to form own brands by them. The professor's brand constantly interacts with the university brand and is in a state of direct dependence on it. The nature of this dependence is determined by the architecture of university's brand portfolio and the role assigned to the professor's brand in this portfolio. The effectiveness of the interaction of professor's brand with university brand increases under the condition of dominance between them of mutually supportive (synergistic) or at least unilaterally predominant interaction. Manifestations of mutually oppressive, unilaterally oppressive and/or oppressive-predominant interaction of brands of university and professor indicate their strategic incompatibility as self-organized systems and have a destructive effect on the quality of training applicants for higher education. The model of oppressive-predomi- nant interaction of the professor's brand with the brand of university can be consciously used by one of them only for the purpose of temporary situational support of the "brand-confederate" in the absence of excessive resource, image and/or reputational losses for the "initiator brand". Ignoring the need for brand formation by university actualizes for it the risks of losing professors interested in personal branding and, consequently, actualizes the problem of deficit of highly qualified personnel. The mutually supportive interaction of the professor's brand with the university brand cre- ates a synergy effect, ensuring their competitiveness in relation to the brand proposals of the world's leading higher ed- ucation institutions, which intend to enter the Ukrainian market of educational services in the near future. The original- ity of the author's research is based on its interdisciplinary nature: the initial provisions of marketing, management, psy- chology, sociology and a number of other fields of knowledge are extrapolated to the theory and methods of professio n- al education in the article. Practical value. The obtained results should be used in the process of brand formation by professors and university administration.
{"title":"CORRELATIONAL INTERDEPENDENCE OFUNIVERSITY BRAND AND PROFESSOR’S BRAND","authors":"I. Yunyk","doi":"10.30929/1995-0519.2021.4.55-60","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.55-60","url":null,"abstract":"Purpose. Of the article is to highlight the correlational interdependence of the concepts \"university brand\" and \"professor’s brand\". Methodology. In course of research the following methods were used: analysis and synthesis, in- duction and deduction, extrapolation and modeling of the initial provisions of psychological and pedagogical science. Results. The field of higher education in Ukraine is dominated by the Eastern (Asian) approach to branding, which is characterized by the creation and promotion of the corporate brand of higher education as a direct guarantee of success of professor’s brands as its subbrands. In turn, the success of branding initiatives by professors of universities act solely as a direct result of branding of the whole institution, which leads to total disregard of the need to form own brands by them. The professor's brand constantly interacts with the university brand and is in a state of direct dependence on it. The nature of this dependence is determined by the architecture of university's brand portfolio and the role assigned to the professor's brand in this portfolio. The effectiveness of the interaction of professor's brand with university brand increases under the condition of dominance between them of mutually supportive (synergistic) or at least unilaterally predominant interaction. Manifestations of mutually oppressive, unilaterally oppressive and/or oppressive-predominant interaction of brands of university and professor indicate their strategic incompatibility as self-organized systems and have a destructive effect on the quality of training applicants for higher education. The model of oppressive-predomi- nant interaction of the professor's brand with the brand of university can be consciously used by one of them only for the purpose of temporary situational support of the \"brand-confederate\" in the absence of excessive resource, image and/or reputational losses for the \"initiator brand\". Ignoring the need for brand formation by university actualizes for it the risks of losing professors interested in personal branding and, consequently, actualizes the problem of deficit of highly qualified personnel. The mutually supportive interaction of the professor's brand with the university brand cre- ates a synergy effect, ensuring their competitiveness in relation to the brand proposals of the world's leading higher ed- ucation institutions, which intend to enter the Ukrainian market of educational services in the near future. The original- ity of the author's research is based on its interdisciplinary nature: the initial provisions of marketing, management, psy- chology, sociology and a number of other fields of knowledge are extrapolated to the theory and methods of professio n- al education in the article. Practical value. The obtained results should be used in the process of brand formation by professors and university administration.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116408233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-23DOI: 10.30929/1995-0519.2021.4.67-74
N. Rychak, N. Kizilova
Purpose. The growth of surface water salinity in urban landscapes due to both anthropogenic factors and gradual global climate change is studied. The influence of various factors is analyzed, according to the data that have been published in recent years. Methodology. Statistics on the state of surface waters, acidity of precipitation and the quality of drinking water in Ukraine show that in the southern and south-eastern regions the situation is becoming threatening. As Kharkiv region is one of the three leaders in the demands for drinking and technical water among the regions of Ukraine, the analysis of water sources in the Kharkiv region is carried out. Results. The results of measurements of chemical parameters of water samples from different parts of the river system Kharkiv-Lopan-Uda in Kharkiv: at the entrance of each river into the city, at industrial sites, at the mouth and at the exit of the river Uda from the city. It is shown that in recent years there has been a steady increase in the total concentration of salts. The rivers Kharkiv, Lopan and Udy at the entrance to the territory of Kharkiv have a fairly low content of sulfates, chlorides, magnesium and calcium, but after the passage of industrial areas to the city center there is a significant increase in salinity and water hardness. Our own data are in good agreement with the results of water quality tests by other laboratories. Thus, in the context of global climate change, the salt content in the river system Kharkiv-Lopan-Uda increases, which significantly affects the system of groundwater and drinking water. Originality. In the research the detailed data on concentrations of the ions Cl-, SO42-, Са++, Mg++ in 12 locations along the three rivers (Kharkiv, Lopan, Udy) of the complex river sys- tem in different seasons (spring, summer, autumn) have been studied and compared to similar data from open sources. The statistical dependencies of the relative concentrations during the last 40 years have been analyzed. Practical meaning. It is determined that the concentrations of some ions demonstrate the monotones growth during the last years, while others varies non-monotonously. Therefore, the influence of different natural and antropogenic factors on global gradual increase in the river water salinity can be quantified by a complex index weighted over a set of concentrations. Conclusions. The results of the literature and measurement data analysis confirmed that with increasing anthropogenic factors and global climate change, the level of surface and groundwater in the urban area of Kharkiv region will decrease and their quality will deteriorate due to increased salinity, calcification and levels of a number of pollutants, which requires further detailed study of this complex problem, permanent data monitoring and systematization in the open access sources of information, which can be processed both by statistical methods and with the help of new system dynamic approaches for the dyn
{"title":"SALINATION OF RIVER WATERS UNDER THE CONDITIONS OF URBOLANDSCAPE GEOSYSTEMS AND CLIMATE WARMING","authors":"N. Rychak, N. Kizilova","doi":"10.30929/1995-0519.2021.4.67-74","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.67-74","url":null,"abstract":"Purpose. The growth of surface water salinity in urban landscapes due to both anthropogenic factors and gradual global climate change is studied. The influence of various factors is analyzed, according to the data that have been published in recent years. Methodology. Statistics on the state of surface waters, acidity of precipitation and the quality of drinking water in Ukraine show that in the southern and south-eastern regions the situation is becoming threatening. As Kharkiv region is one of the three leaders in the demands for drinking and technical water among the regions of Ukraine, the analysis of water sources in the Kharkiv region is carried out. Results. The results of measurements of chemical parameters of water samples from different parts of the river system Kharkiv-Lopan-Uda in Kharkiv: at the entrance of each river into the city, at industrial sites, at the mouth and at the exit of the river Uda from the city. It is shown that in recent years there has been a steady increase in the total concentration of salts. The rivers Kharkiv, Lopan and Udy at the entrance to the territory of Kharkiv have a fairly low content of sulfates, chlorides, magnesium and calcium, but after the passage of industrial areas to the city center there is a significant increase in salinity and water hardness. Our own data are in good agreement with the results of water quality tests by other laboratories. Thus, in the context of global climate change, the salt content in the river system Kharkiv-Lopan-Uda increases, which significantly affects the system of groundwater and drinking water. Originality. In the research the detailed data on concentrations of the ions Cl-, SO42-, Са++, Mg++ in 12 locations along the three rivers (Kharkiv, Lopan, Udy) of the complex river sys- tem in different seasons (spring, summer, autumn) have been studied and compared to similar data from open sources. The statistical dependencies of the relative concentrations during the last 40 years have been analyzed. Practical meaning. It is determined that the concentrations of some ions demonstrate the monotones growth during the last years, while others varies non-monotonously. Therefore, the influence of different natural and antropogenic factors on global gradual increase in the river water salinity can be quantified by a complex index weighted over a set of concentrations. Conclusions. The results of the literature and measurement data analysis confirmed that with increasing anthropogenic factors and global climate change, the level of surface and groundwater in the urban area of Kharkiv region will decrease and their quality will deteriorate due to increased salinity, calcification and levels of a number of pollutants, which requires further detailed study of this complex problem, permanent data monitoring and systematization in the open access sources of information, which can be processed both by statistical methods and with the help of new system dynamic approaches for the dyn","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125718869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-23DOI: 10.30929/1995-0519.2021.4.142-148
Y. Trotsenko, Volodymyr Brzhezitskyy, O. Yandulskyy, Artem Nesterko, M. Dixit
Purpose. Studying the effect of non-identical protective characteristics of surge arresters on the efficiency of several arresters in parallel connection. Methodology. Free software for circuit simulation was used to solve electrical circuits with nonlinear parameters. To simulate the effect closest to real conditions, oscillograms of real lightning currents, digitized using free specialized software, were used. Results. The study of the parallel connection of two typical surge arresters designed for high-voltage networks of voltage class 110 kV was performed. To analyze the effect of non- identical protective characteristics, the residual voltage of one of the arrester was varied as a percentage of the residual voltage of the other one. It was found that when the difference between the residual voltages of the surge arresters ex- ceeds 6%, the current distribution through the surge arresters can reach a ratio of 1:4. Deliberate parallel connection of surge arresters is an effective solution to increase energy handling capability, provided that the residual voltages of the surge arresters are as close as possible. It was shown that a small difference in residual voltages is more dangerous in the case of positive lightning, which is characterized by a longer current impulse duration than negative lightning. It was shown that at the same amplitude of lightning currents, at struck by a positive lightning the surge arrester should absorb energy 10 times more, than at struck by a negative lightning. Originality. The approach takes into account the differences between impulses of lightning currents of negative and positive polarity, which cannot be achieved when using the approximation of lightning currents by simplified mathematical expressions. Practical value. The use of the proposed approach allows a more in-depth analyzing the various schemes of protection of electrical networks against overvoltages, because it takes into account the actual features of the lightning current curve. Conclusions. Further development of the proposed approach is seen in its use both in the selection of surge arresters to protect electrical equip- ment of high-voltage electrical networks, and in the educational process.
{"title":"EFFECT OF LIGHTNING CURRENTS OF NEGATIVE AND POSITIVE POLARITY ON SURGE ARRESTERS IN PARALLEL CONNECTION","authors":"Y. Trotsenko, Volodymyr Brzhezitskyy, O. Yandulskyy, Artem Nesterko, M. Dixit","doi":"10.30929/1995-0519.2021.4.142-148","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.142-148","url":null,"abstract":"Purpose. Studying the effect of non-identical protective characteristics of surge arresters on the efficiency of several arresters in parallel connection. Methodology. Free software for circuit simulation was used to solve electrical circuits with nonlinear parameters. To simulate the effect closest to real conditions, oscillograms of real lightning currents, digitized using free specialized software, were used. Results. The study of the parallel connection of two typical surge arresters designed for high-voltage networks of voltage class 110 kV was performed. To analyze the effect of non- identical protective characteristics, the residual voltage of one of the arrester was varied as a percentage of the residual voltage of the other one. It was found that when the difference between the residual voltages of the surge arresters ex- ceeds 6%, the current distribution through the surge arresters can reach a ratio of 1:4. Deliberate parallel connection of surge arresters is an effective solution to increase energy handling capability, provided that the residual voltages of the surge arresters are as close as possible. It was shown that a small difference in residual voltages is more dangerous in the case of positive lightning, which is characterized by a longer current impulse duration than negative lightning. It was shown that at the same amplitude of lightning currents, at struck by a positive lightning the surge arrester should absorb energy 10 times more, than at struck by a negative lightning. Originality. The approach takes into account the differences between impulses of lightning currents of negative and positive polarity, which cannot be achieved when using the approximation of lightning currents by simplified mathematical expressions. Practical value. The use of the proposed approach allows a more in-depth analyzing the various schemes of protection of electrical networks against overvoltages, because it takes into account the actual features of the lightning current curve. Conclusions. Further development of the proposed approach is seen in its use both in the selection of surge arresters to protect electrical equip- ment of high-voltage electrical networks, and in the educational process.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125199493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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