bluuebunny/crossref_metadata_2025 huggingface dataset:
Electrochemical studies of La0.6Ce0.2Nd0.2Ni4Co0.4Mn0.3Al0.3 electrodes with different mass ratio of metal hydride and carbonyl nickel powders
Authors: Kazakov A N , Bodikov V Yu , Blinov D V
Published: March 2021

Metal hydride materials are actively used as anode materials for Ni-MH batteries. Various high conductive additives (graphite, nickel, copper, etc.) to the active hydrogen storage material are used to increase the electrical conductivity and mechanical stability of the electrodes. In this work, metal hydride electrodes based on AB5 type alloy mixed with carbonyl nickel in various mass ratios are prepared and studied. The electrochemical properties of the prepared electrodes, such as activation performance, maximum discharge capacity, and high rate dischargeability are investigated in detail.
Application of energy efficiency indicators in electric power distribution tariff-setting
Authors: Shvedova V Y
Published: March 2021

To increase the energy efficiency of the Russian economics it is necessary to incentivize the reduction of consumption of energy resources by different organizations including Distribution Network Operators. The existing system of regulation of electricity distribution tariffs in the Russian Federation contains incentives for Distribution Network Operators to reduce only their electricity losses. The paper develops a method of calculating energy efficiency indicators for Distribution Network Operators and an approach to accounting these indicators in electric power distribution tariffs in case of setting tariffs using benchmarks or using the method of long-term indexation of the total required revenue. The advantage of the method suggested in the article compared to energy efficiency incentives used in different European countries and the US consists in the fact that it does not complicate tariff-setting procedures and does not require significant investments, increasing transaction costs or extensive amendments to existing legislation.
Development of a power plant for an unmanned airship
Authors: Sazhnev A I , Smirnov S E
Published: March 2021

In this work, a power plant layout for an unmanned airship was designed and tested. The layout is designed to provide power to the target load with a rated power of not more than 500 W, peak power of not more than 1000 W and daily energy consumption of not more than 2600 W · h (of which in the dark - no more than 1300 W · h) with a daily total solar radiation not less than 5.51 kW · h / m2 (daily average for July in the Moscow region is given). Testing the layout, which consists in checking the characteristics of individual elements of the layout in ground-based conditions, has shown the feasibility of using airships in the service sectors.
International environmental indicators of sustainable development within Russian energy companies (using the example of PJSC Inter RAO)
Authors: Andreev V N , Kulakov A V
Published: March 2021

In this paper, we consider the problems of implementing the principles of sustainable development, which in recent years have been actively implemented in developed countries and adopted by international ESG rating agencies into the scope of business activity of Russian companies within the fuel and energy sector (hereinafter referred to as energy companies). The paper also analyzes the potential positive effects that the implementation of energy conservation programs has on the ecological, economic, and the social aspects of the energy companies.
The concept of an effective NPP with a gas-cooled thermal neutron reactor
Authors: Surayev A S , Kotov V M , Skakov M K , Irkimbekov R A
Published: March 2021

The paper shows the technical possibilities of increasing the efficiency of nuclear power plants by using the technology of a channel thermal neutrons reactor with a gas coolant and water moderator. The main characteristics of the core, fuel campaign and heat exchange equipment are considered. Developed new concept of NNP design based on promoted gas-cooled reactor.
Concession as a tool for improving energy efficiency in case of tariff regulation
Authors: Smirnova D A , Shuvalova D G
Published: March 2021

In this paper, we study the state of heat networks in Russian Federation. Modern technologies used to reduce losses in the pipeline and increase energy savings in the boiler house are considered. The article analyzes the experience of using pipelines in foamed polyurethane insulation as the most effective way to combat heat losses. The current problem of financing investment projects in the energy sector and the difficulties of attracting private capital in this area are studied. One of the ways to solve this situation is to conclude concession agreements. The paper presents the results of tariff calculations with the participation of the boiler house in the concession, which prove the effectiveness of modernization under the concession agreement.
Estimation of the efficiency of involvement of renewable energy sources in the energy balance of the south region of Russia
Authors: Nikiforova D V , Krivaya D
Published: March 2021

The article contains a study on the feasibility of using renewable energy sources, in particular wind energy, for energy supply to consumers in the southern region of Russia. The paper presents the results of an economic assessment of the efficiency of construction of a wind farm with an installed capacity of 300 MW, as well as a comparison of two options for financing the project. Conclusions and recommendations are formulated to stimulate and support renewable energy sources in the southern region of Russia.
Evaluating the potential of modular passive cooling systems
Authors: Savchenkov P M
Published: March 2021

The article describes the possibilities prospects and technical-economic efficiency of using the modular cooling systems, especially passive cooling systems, for cooling various types of electronic equipment and infrastructure facilities. They are especially interesting when applied in scalable systems, which allows to obtain significant savings in design, production, installation and operation of such systems.
Utilization of Waste Glass and Fly Ash as a Replacement of Material Concrete
Authors: Sunarsih Ernawati Sri , Patanti Galuh Widi , Agustin Rima Sri , Rahmawati Kundari
Published: March 2021

Waste glass creates serious environmental problems, mainly due to the inconsistency of waste glass streams. Increasing environmental pressure to reduce solid waste and to recycle as much as possible. The properties of concretes containing waste glass as fine aggregate were investigated in this study. The purpose of this research was to determine the influence and percentage optimum of glass waste as replacement of fine aggregate and fly ash as replacement of 20% of weight cement in flexural strength and sorptivity of concrete. This study used the experimental method to measure the results of treatment in research samples in the laboratory. The samples used 24 pieces blocks with dimensions of 150 mm x 150 mm with a length of 600 mm as flexural strength specimens and 24 pieces cylinders with a diameter of 100 mm with height of 50 mm as sorptivity specimens. The variation of glass powder starts from normal concrete 0%, 10%, 20%, 30% and 40%, each variation consists of 4 samples. The conclusions of this study are there is significant effect between glass powder variations as a replacement for part of fine aggregate and fly ash as a replacement for 20% of the weight of cement to the flexural strength and sorptivity of concrete. The optimum percentage 18.5% of glass powder with a flexural strength of 2.971 MPa and the percentage of the use of glass waste as a partial replacement for optimal fine aggregate which is in the variation of 20% glass powder with an initial sorptivity minimum value of 0.0076 mm/s1/2 and in the variation of 40% glass powder with a secondary sorptivity minimum value of 0.0034 mm/s1/2.
Manufacturing of Natural Fiber-Reinforced Recycled Polymer–a Systematic Literature Review
Authors: Kusuma Sandy Sidik Wisnu , Saputra Holam Cahya , Widiastuti Indah
Published: March 2021

It is necessary to analyze the manufacturing process of recycled natural fiber reinforced polymers to produce polymer composites that are successful in the manufacturing process. This discussion begins with the manufacturing process of natural fiber reinforced recycled polymers. The outline of this article refers to the manufacturing process, manufacturing process constraints, and the appropriate methods of the manufacturing process. The literature review describes the manufacturing process of natural fiber reinforced recycled polymers with the constraints encountered during the manufacturing process by investigating suitable methods of treating natural fibers for success in the manufacturing process of natural fiber reinforced recycled polymers. The five-step systematic literature review (SLR) was chosen as the approach in reviewing the literature. The analysis of selected articles reveals that the successful manufacturing process of natural fiber reinforced recycled polymers is the treatment of natural fibers, followed by a manufacturing process that matches the polymer manufacturing needs. Treatment of natural fibers using alkaline treatments (sodium hydroxide (NaOH) and stearic acid ((CH3(CH2)16COOH)) is the most influential factor in the success of the manufacturing process of recycled natural fiber reinforced polymer composites.
Experiential Learning Using Solar Tracker Prototype In Industrial Automation Course
Authors: Juliyanto Nur Arif Suko , Widiastuti Indah , Akhyar Muhammad
Published: March 2021

Experiential Learnings is based on the understanding that the knowledge created as the result of an experience. Experiential Learning consisted of four stages, abstract conceptualization, active experimentation, concrete experience, and reflective observation. Experiential learning - Based learning is considered to have characteristics that are expected in the 21st Century Skills Learning. This study aims to develop experiential learning-based instructional design in Production Automation courses using a solar tracker system prototype. The effectiveness of the learning design is measured from the student learning outcomes and responses of the questionnaire provided. The control system subject in the production automation course is considered to have abstract and complex learning material so that it requires visualization to facilitate understanding. The development of the instructional designs is carried out using the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. The instructional design of the course was implemented in a class consisting of 40 students in the department of Mechanical Engineering Education in a state university in Central Java, Indonesia. From a series of lectures during the course of Production Automation, the instructional design developed based on experiential learning approach received a positive response from the students. The student learning outcomes were also considered good with the average scores of more than 80. This study shows that experiential learning approach could stimulated student learning in mechanical engineering subject.
Mechanical Properties of Bamboo on Virgin and Recycled High-Density Polyethylene Matrix
Authors: Santosa Dicky Permana Adji , Widiastuti Indah , Suharno
Published: March 2021

Natural fiber-reinforced polymer composites are considered to have advantages over synthetic fibers, namely that they are more environmentally friendly but with better mechanical properties. The purpose of this study was to make a pure / recycled HDPE (High-Density Polyethylene) composite with bamboo fiber reinforcement by analyzing the mechanical properties of the composite. The method used in this research is experimental with a quantitative approach. Experiments are carried out by creating or manipulating certain conditions and by providing control over the test specimen. Pure / recycled HDPE plastics and bamboo fibers will be mixed in a machine extrusion molding with a temperature heater (160, 165, 170, 175) ° C. Before fabrication, bamboo fibers are treated with alkaline treatment, namely by immersing 5% NaOH. The ratio of mass fraction between vHDPE/rHDPE and bamboo fiber was 70%: 30%. This study evaluated the mechanical properties of HDPE-bamboo composites using Izod Impact testing with ASTM D 256-05 standards. Tests were carried out to analyze the differences between pure HDPE and recycled HDPE matrices on bamboo fiber reinforced composites. The mechanical test results showed that the impact strength on bamboo composites with recycled HDPE matrix was 2.69 (KJ / m2) while bamboo composites with pure HDPE matrices had an impact strength of 1.6 (KJ / m2). Thus, the mechanical properties measured by impact strength on composites with recycled HDPE matrices were better than composites with pure HDPE matrices. In accordance with the results of research that has been done, recycled HDPE can be used as a matrix composite with mechanical properties that are not too different from composites with pure HDPE matrices. This can be done as a means of utilizing recycled HDPE waste instead of pure HDPE.
Characteristics of recycled HDPE/bamboo fibre composite
Authors: Rohmat  , Widiastuti I , Wijayanto D S
Published: March 2021

Increasing the mechanical properties of recycling can be done by adding natural fibers into composite materials. The focus of this research is to develop a composite using bamboo as a reinforcing material and recycled High Density Polyethylene (HDPE) as a matrix using the extrusion method. This study aims to analyze the mechanical analysis between bamboo fiber-based composites using a pure HDPE matrix and composites using recycled HDPE matrices at a matrix volume fraction: 70%: 30% fiber. Mechanical tests were performed using the tensile testing machine model RAY-RAN Test Equipment M500-50CT with ASTM D 638 standards to evaluate the tensile strength and modulus of the composite. The results showed that the tensile strength and Young’s modulus of bamboo fiber reinforced rHDPE composites were 8.764 MPa and 52.0152 MPa, respectively. While the bamboo composite with a vHDPE matrix has a tensile strength of 9.3312 MPa and a Young Modulus value of 94.8468 MPa. Thus, bamboo fiber reinforced composites with pure HDPE matrix have better mechanical properties than bamboo composites with recycled HDPE matrices. Differences in matrix shape can affect composites resulting from such fibers.
The Use of Rice Husk Ash in Enhancing the Material Properties of Fly Ash-Based Self Compacted Geopolymer Concrete
Authors: Sari A N , Srisunarsih E , Sucipto T L A
Published: March 2021

Concrete is a material that is needed for building construction or others is increasing. Construction increased as cement use increased. The continued use of cement will cause environmental damage, cement is the 8th largest source of carbon gas emissions in the world. One of the revolutionary developments using environmentally friendly materials as a substitute for cement is geopolymer concrete. Alternative materials rich in silica and alumina for the manufacture of geopolymer concrete, namely adding rice husk ash (RHA), fly ash, silica fume, glass powder, as substitute for cement. A cement substitute can use RHA as partial substitute for geopolymer concrete based on fly ash, which is rich in silica and alumina. For the binder, an activator is needed, the activator itself usually uses NaOH and Na2SiO3. The purpose of this study was to determine the effect of rice husk ash as a partial substitution of fly ash on split tensile strength and porosity of geopolymer concrete and determine the optimum percentage of use of RHA to produce tensile strength and porosity in geopolymer concrete with material calculations using EFNARC 2005. Geopolymer concrete which binders using 14M NaOH and Na2SiO3, and binders namely Fly ash and rice husk ash, with variations for RHA 0%, 5%, 10%, 15%. Sample in the form of cylinder with diameter of 150 mm and height of 300 mm for tensile strength and cylinder with diameter of 2 inches and height of 5 mm for porosity. The specimens were treated for 28 days with room temperature curing. From the data obtained, it can be concluded that there is an effect of RHA to increase tensile strength and reduce porosity in geopolymer concrete with an optimum variation of 10%, with an optimum tensile strength of 1.061 MPa, and minimum porosity of 13.13%.
Natural Fiber Reinforced Polymer in Automotive Application: A Systematic Literature Review
Authors: Huda Mohammad Khoirul , Widiastuti Indah
Published: March 2021

Efforts to develop effective and innovative materials are increasingly being developed by researchers, especially in the development and utilization of NFRP (Natural Fiber Reinforced Polymer) in the automotive sector due to increased demand and increased ecological awareness. The purpose of this literature review article is to provide up-to-date information on the application of NFRP and plastic recycling in the automotive sector as well as consideration of selecting natural fibers for use as reinforcing composites in the automotive sector. This literature review focuses on the progress of the development of polymeric materials applied in the automotive field. Referring to defined inclusion and exclusion criteria, 30 articles in polymer composite studies published between 2015 and 2020 were selected for further investigation. The analysis of selected studies revealed that several leading car manufacturers have produced and developed products from NFRP or recycled plastics with natural fiber reinforcement because they are relatively cheap, lightweight, and able to reduce exhaust emissions. The great potential of using NFRP materials and recycled plastics in the automotive sector presents a future challenge, namely the increasing need for natural fiber in the long term which will certainly have an impact on ecosystems and biodiversity.
A preliminary study of moving droplet combustion of biodiesel (B20) in a microgravity environment
Authors: Saputro H , Rahmadi W , Wijayanto D S , Muslim R , Fitriana L , Munir F A
Published: March 2021

The characteristics of B20 biodiesel droplet combustion on flame propagation rate at microgravity conditions are fascinating to study. The observation of Biodiesel B20 fuel was chosen because it supports the Indonesian government policy on the use of alternative energy. This research is an initial stage to determine the effect of variations in the speed of motion of biodiesel B20 droplets on the flame propagation distance. At this initial stage, the droplet velocity is set at 5 mm / s. There are three droplets used, namely droplet A (igniter droplet), droplet B (flame source droplet), and droplet C (observation droplet). Each droplet has a diameter of 1 mm. Data was collected directly through video analysis to determine the propagation distance of SBC/d0. The results showed that the investigative droplet (C), which was 3 mm from droplet B, had a maximum burnt distance of SBC/d0 = 4 - 4.2.
Cluster Analysis for Student Grouping Based on Index of Learning Styles
Authors: Pamungkas Allan Auri Putra , Maryono Dwi , Budiyanto Cucuk Wawan
Published: March 2021

This research aims to group students of Information and Computer Education, Universitas Sebelas Maret into classes based on the similarity of student’s learning style, and to analyze the characteristics of each group. In this research we used Felder and Silverman learning style model (FSLSM) that includes four dimensions, which are (1) learning process; (2) learning perception; (3) information input; and (4) information understanding. We used a quantitative descriptive method combined with cluster analysis technique. The subject of this research were 58 2ndyear students of the Department of Computer and Informatics Education Universitas Sebelas Maret. Assessment of learning style characteristics was done by using the Index of Learning Styles (ILS) instrument developed by Felder and Soloman. We applied a hierarchical clustering method to the student’s ILS data for the cluster analysis. This research indicated that two dominant clusters were formed with different characteristics in the dimensions of learning styles. Cluster 1 has a reflective preference in the dimension of learning process with an average of -3.76; a sensing preference in the dimension of learning perception with an average of 4.24; a visual preference in the dimension of information input with an average of 5.21; and a global preference in the dimensions of information understanding with an average of -2.66. Whereas cluster 2 has an active preference in the dimension of learning process with an average of 2.52; a sensing preference in the dimension of learning perception with an average of 1.48; a visual preference in the dimension of information input with an average of 5.08, and a global tendency in the dimensions of understanding information with an average of -0.04. We either found some outliers with different characteristics of learning style outside the two clusters. The results of this research can be used by lecturers to determine the appropriate learning strategy for each class.
How Students’s Higher Order Thinking Skills Through E-Learning During the Covid-19 Pandemic? What does it have to do with University?
Authors: Setyowati Ririn , Sarwanto  , Muzzazinah
Published: March 2021

This study describes the higher-order thinking skills of students at the elementary school level using e-learning during the Covid-19 pandemic. The research subjects were 183 students at the elementary school level in Ngawi Regency, East Java. The data collection technique uses the HOTS development test which includes seven subjects, namely natural sciences (IPA), Pancasila and civic education (PPKn), Indonesia language, mathematics, social sciences (IPS), cultural arts and crafts (SBdP), and physical education, exercise, and health (PJOK). The results showed that students obtained the highest score of 96,7 and the lowest of 30,0. The percentage of subjects with the greatest difficulty through the use of e-learning was physical education, sports and health with a score of 54%, while subjects with the least difficulty were natural sciences with a score of 10%.
Geometric Thinking Ability for Prospective Mathematics Teachers in Solving Ethnomathematics Problem
Authors: Hendriyanto A , Kusmayadi T A , Fitriana L
Published: March 2021

This study aims to identify, analyze, and describe the level of geometric thinking skills of students based on van Hiele’s theory. This study uses a qualitative descriptive approach with 63 respondents. Researchers as the main instrument and another used instrument are analytic geometry questions in the content fields of circles and ellipses based on ethnomathematics as well interview guidelines. The data analysis of this study is using qualitative technique data analysis by selecting 4 students from 63 subject populations with purposive sampling method. The results of this study showed (1) students’ geometric thinking ability is still low. (2) there were 39.7% students at pre-visualization level, 31.8% students at visualization level, 7.9% students at the level of analysis, 20.7% students at the level of informal deduction, 0% students are at the deduction and rigor levels. (3) students at the visualization level is able to visualize batik motif into geometric patterns, at the level of analysis students are able to identify what elements are known and what are needed to solve the problems, at the level of informal deductions students are able to make statements related to the relation between existing elements and able to prove the truth statement made.
Mathematical Literacy Skills Students of the Junior High School in Solving PISA-Like Mathematical Problems
Authors: Rahmawati W A , Usodo B , Fitriana dan L
Published: March 2021

This study aims to describe students of the junior high school mathematical literacy skills in solving PISA-like problems on number content. PISA-like items are problems created using dimensions in PISA. The method used in this study was descriptive qualitative. The research subject were students of the ninth-grade students in one of the integrated Islamic junior high school in Surakarta, which consisted of six students. The instruments used were tests, interviews and researchers. The results showed that the students’ mathematical literacy skills were classified as good for level 1 to 3 and low for level 4 and 5, and very low for level 6. This categorization was based on the number of students who answered the questions correctly at each level. Students in levels 1 to 3 were able to formulate mathematical situations and translate real-world problems into mathematical representations and then are able to choose the right solution strategy. However, when students faced level 4, 5, and 6 level questions, with a higher level of reasoning and complex problem situations, many students still faced difficulties. It has an impact on the students’ ability to determine strategies, make many mistakes, and not be able to answer the questions correctly.
The Development of Interactive Multimedia Based on Mathematics to Increase the Mathematical Connection Ability in Probability Learning
Authors: Purwanti  , Mardiyana  , Indriati D
Published: March 2021

This research aimed to develop an interactive multimedia-based mathematics lesson using Adobe flash on the probability material at SMK, to know the quality of media and increase student mathematical connection. This used the research development model 4-D. The instrument in this study is the learning media validation sheet, student’s response questionnaire to measure the media simplicity, and the question test to measure the media effectiveness. The results are described: 1) the validity level of mathematical interactive multimedia to improve the mathematical connection and the students’ learning achievements meet the valid criteria with a result of 89.17%. 2) The practicality level of mathematical interactive multimedia to improve the mathematical connection and achievements of a student’s learning meet the practice criteria with results 83.71%. 3) the effectiveness level of the mathematical interactive multimedia to improve the student’s mathematical connection meets the effectiveness criteria with results of 80,28%. The developed interactive mathematics multimedia can improve students’ mathematical connection skills in probability learning of 27.62% on the first indicator and 36.18% on the second indicator. So, the interactive mathematics multimedia that was developed can improve student’s mathematical connection skills in probability learning at SMKN 1 Wonoasri.
Generalized Space Time Autoregressive Integrated Moving Average with Exogenous (GSTARIMA-X) Models
Authors: Aulia N , Saputro D R S
Published: March 2021

Space time data is data that relates to events at previous times and locations. One of the models that used to analyze space time data is the Generalized Space Time Autoregressive Moving Average (GSTARMA) model. GSTARMA model uses parameters p andλkto represent the time order and spatial order respectively. Hence, this model can be called GSTARMA(p,λk). Because in fact there are more models with different parameters for different locations, GSTARMA(p,λk) model is more realistic. If space time data is not stationary, a different order is added so that the model becomes GSTARIMA(p, d,λk). In modelling sometimes the accuracy of the model can increase by other influence variables. These variables are named exogenous variables. The GSTARIMA model with exogenous variables is named the GSTARIMA-X(p, d,λk) model. This research aims to examine the model and its estimation of parameters. Model parameters are estimated using the Generalized Least Square (GLS) method. The method in this writing is literature study obtained from several articles, journals, and books that support in achieving research. The results of the study show that with the GLS method, parameter estimates can be obtained with the assumption of time order 1 and spatial order 1.
Generalized Cross Validation (GCV) in Smoothing Spline Nonparametric Regression Models
Authors: Maharani M , Saputro D R S
Published: March 2021

A nonparametric regression model is utilized if the the regression curve does not contain information about the accepted shape and accepted curve is exist in a function. If any curve is given without the limitation of a certain functional form, a rough and non-unique curve will result. The smoothing spline can be utilized to remove rough curves in some segments by following a curve pattern. An approach that combines nonparametric regression and smoothing spline is known as the smoothing spline nonparametric regression model. The problem in estimating is the selection and determination of smoothing parameters obtained by taking into the sum of knots used and the position of the knots so that the Generalized Cross-Validation (GCV) method is required. A study was conducted on the smoothing spline nonparametric regression model on GCV. The method used in research is a literature study obtained from some articles, journals, and books that support research achievement. The results showed that with the GCV method the minimum GCV value was obtained which would determine how well the smoothing parameters shown by the estimator did not change significantly even though the number and position of the knots varied.
Dynamic of Cytokine Storm in Human Inflammatory Response of Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV)-Induced Disease
Authors: Wiraya A , Fitriana L , Triyanto  , Setiawan R
Published: March 2021

Infection of Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) in the human body is characterized by the detection of large amounts of the virus by cytokine as the response to inflammation. In the human body, there are two types of inflammatory responses by a cytokine called pro-inflammatory and anti-inflammatory cytokine. A non-dimensionalized mathematical model of the inflammatory response system has been constructed in the form of a system of differential equations, which consists of two variables and five parameters. The rate of pro-inflammatory and anti-inflammatory cytokine natural production are two important parameters that correlate with a chronic SARS-CoV infection called a cytokine storm. Varying these parameter values, some non-chaotic torus attractors were found in some numerical simulation with the initial value around the equilibrium point obtained by fixing parameter values at the Generalized Hopf bifurcation point. These phenomena show that in cytokine storm condition, fluctuation of pro-inflammatory and anti-inflammatory cytokines form some patterns which are complex, so that they are difficult to be predicted. Mesenchymal stem cells (MSC), chloroquine (CQ), and hydroxychloroquine (HCQ), which have an effect on pro-inflammatory and anti-inflammatory cytokine production, can be used to reduce the cytokine storm.
Fundamental Mathematical Capability of Seventh Grade Student’s Mathematical Literacy in the One Variable Linear Equation and Inequality
Authors: Nurohmah S Z , Mardiyana  , Pratiwi H
Published: March 2021

Equation and inequality are aspect of the traditional mathematical content that are primary in describing, modelling and interpreting change fenomena. The study aims to describe fundamental mathematical capability of student’s mathematical literacy in the one variable linear equation and inequality. They are communication; mathematizing; representation; using simbolic, formal and technical languange and operation; devising strategies for problem solving; reasoning and argument; and using mathematical tools. This study used qualitative descriptive method. The data was collected through tests and interviews. 102 subjects seventh grade students of MTs Negeri 1, MTs Negeri 2 and MTs Negeri 4 Kebumen did the writen test. 9 students with high, moderate and low categories are selected with purposive sampling for interviewed. The result shows that students are lack in all fundamental mathematical capability, especially in representation; using simbolic, formal and technical languange and operation; devising strategies for problem solving; reasoning and argument; and using mathematical tools capabilities.
The Critical Thinking Process of Senior High School Students in Problem-Solving of Linear Equations System
Authors: Fadhilah R , Sujadi I , Siswanto
Published: March 2021

In this 21st century, having critical thinking skill is a must. This critical thinking skill will lead students to solve the problem they find. Problem solving, one of mathematical abilities, is an advance ability that need more complex thinking process, like critical thinking. The purpose of this study is describing senior high school students critical thinking process in solving problem of linear equations system. This is descriptive qualitative research with two tenth grade students of SMA Negeri 1 Klego as the subjects. In this study, purposive sampling method is used to choose the subjects of the research. To collect the data of student’s critical thinking process, used tests, interviews, and observations. The study result showed that the students’ critical thinking process had not fully worked out. Both subjects can go through the clarification step of critical thinking well, but not in the analysis and strategy step.
Students Mathematical Discourse Analysis by Commognition Theory in Solving Absolute Value Equation
Authors: Nisa Z , Lukito A , Masriyah
Published: March 2021

Solving the absolute value equation is a problem that is often experienced by students in learning absolute value. This qualitative article reports on students’ discourse analysis in solving absolute value equations based on the commognition theory. Ten students in grade 10 were randomly selected as the subjects of this study. In this study, two levels of analysis was carried out; firstly, analyzing four features of the discourse, namely word use, visual mediators, narratives, and routines, and secondly, analyzing the categories of student’s discourse whether they belong to ritualised or explorative discourse. The results of this study indicated that student discourse leads to the explorative discourse category.
Methods for developing motivational and value-orientated readiness of math students at teacher training universities for implementing educational innovations
Authors: Vlasenko K V , Chumak O O , Sitak I V , Achkan V V , Kondratyeva O M
Published: March 2021

The present article considers the issue of developing motivational and value-orientated readiness of Math students at teacher training universities for implementing educational innovations. The method, chosen for the present research is the analysis of the scientists’ viewpoints, on-line resources and reports regarding the issue of designing and using Rich Tasks when teaching Mathematics, methods and means for developing students’ motivation for implementing educational innovations. This paper describes the methods, aimed at developing in students motivation and ability to systematize, devise, use Rich Tasks in their professional activity and to combine them with other innovational learning methods and means. The analysis of the teacher training internship results and the surveys in the experimental group give ground to make a conclusion about efficiency of the methods offered.
Specifics of using image visualization within education of the upcoming chemistry teachers with augmented reality technology
Authors: Midak L Ya , Kravets I V , Kuzyshyn O V , Baziuk L V , Buzhdyhan Kh V
Published: March 2021

It is beneficial to study chemical disciplines, applying the Augmented Reality for the upcoming chemistry teachers, as far as the visualisation of the demonstration material in the 3D helps students understand various processes and phenomena, the structure of chemical compounds and the mechanisms of their correlation in a better way. The object of the project is the development of program and printed tools, designed to visualize the education process within chemistry disciplines according to the augmented reality technology. The authors have developed applications, designed for visualisation of the study material with AR. When a mobile phone is pointed on a marker, the image “comes to life”, its three-dimensional model appears; it can be manipulated in some way (inversion, enlargement, viewing from different sides) to understand its structure, operating principle etc. better. Applying augmented reality objects gives the teacher an opportunity to explain big amount of theory quickly and effectively, and the students – to memorise it effectively, develops creativity and boosts motivation for study. Applying AR while training the upcoming chemistry teachers gives the ability to prepare them for applying this technology during the education process in the general secondary education establishments.
Contradictions in the traditional methods of electrodynamics teaching as a determinant of its update
Authors: Konoval O A , Turcot T I , Solomenko A O
Published: March 2021

The article deals with the theoretical analysis of the traditional approaches to electrodynamics teaching. The authors pay attention to the contradictions arising in the process of combined application of Biot Savart and Coulomb’s laws. The thesis of some limitation of the traditional presentation of the course of electrodynamics is substantiated. In this connection the necessity of updating methodology of electrodynamics teaching is determined. As an innovative approach to solving this problem, it is proposed to analyze and address the existing contradictions of electrodynamics teaching using a specially developed (copyright) methodology - the methodology of the development of students’ critical thinking (MDCT). Using specific examples, the content of each of the stages of the proposed methodology, which can be used in the study of electrodynamics in secondary and higher school, is characterized.
Organization of astronomy hometasks with the use of informational and communicative technologies for cognitive activity increase
Authors: Malchenko S L
Published: March 2021

The method of astronomy homework organization in order to increase students’ cognitive activity is described in the article, as well as the possibility of individualisation and differentiation of homework is shown. Modern methods offer a lot of techniques and innovative forms of teaching methods in order to improve students’ knowledge. These innovations are aimed at applying activity-based and person-centered approaches to learning that will help to intensify students’ training activities therefore it will be engaging and productive. Examples of independent practical tasks of different types and use of information and communication technologies are given. The article gives examples of such kinds of work on astronomy classes as: preparation of a textbook, preparation of supporting notes, practical tasks, solution of astronomical problems and creative tasks.
The turmite-based cryptographic algorithm
Authors: Fadieieva L O , Makarenko I Ye , Merzlykin P V
Published: March 2021

The novel turmite-based cryptography algorithm has been designed and implemented. The turmites ability to generate pseudo-random number series makes them promising for cryptographic applications. At the same time, most turmites-related researches concentrate on their mathematical properties and generally don't consider possible applications. Lack of effective implementations of turmites-based cryptographic algorithms makes this research topical. The properties of the proposed algorithm have been examined. The frequency analysis resistance and avalanche criterion have been estimated. The results demonstrate that turmites-based algorithms may be used in cryptography and this application deserves attention and further examination.
Software model for studying the features of wireless connections in Flying Ad-Hoc Networks (FANETs)
Authors: Puleko I , Svintsytska O , Vlasenko O , Chumakevych V
Published: March 2021

Over the last decade, earlier named self-organizing mobile computer networks, MANET (Mobile Ad Hoc Network), including those based on unmanned aerial vehicles (UAV) – FANET (Flying Ad Hoc Network), have become widespread. In FANET, the UAV is connected to the network using wireless technology. Due to the constant dynamics of the nodes of such FANET, in this network, there are sometimes lost connections between the nodes. Modern wireless technologies such as WiFi, ZigBee, AirMAX, and others, have different technical characteristics that significantly affect the ability to build FANET. In the article developed a software model that allows you to study the statistical characteristics of mobile networks. The motion of each object (network node) is described using a quaternion model. The software model is developed in the Python programming language. The obtained software model for the given conditions allows us to estimate the basic statistical characteristics of FANET and to make recommendations to their construction and application.
Information system of economic and mathematical modelling of pricing in the residential sector of Ukraine
Authors: Chernenko V P , Pochtovyuk S I , Vakaliuk T A , Shevchuk L D , Slon Ya V
Published: March 2021

The article deals with the development of a web application on forecasting the dynamics of prices in the residential sector of Ukraine. The classification of economic forecasting methods according to which they are divided into formalized, extrapolated, intuitive methods of forecasting the financial state is presented. It has been established that forecasting methods should meet the following requirements: a combination of subjective value and objective significance of estimates; clear application of estimates, which does not allow different interpretations regarding the choice of methods; create the ability to accumulate statistical information and use it for forecasting. The model of standard square collocation for the real estate market is presented. A web-based application for forecasting the dynamics of prices in the Ukrainian housing sector was developed and tested.
Using augmented reality technologies for STEM education organization
Authors: Osadchyi V V , Valko N V , Kuzmich L V
Published: March 2021

Modernization of the education system and the emergence of innovative learning technologies can improve the educational process. The use of augmented reality technology improves the learning of individual students, their motivation, as well as helps in organizing teamwork, group cooperation. As the topic of augmented reality in education is quite new and little studied for STEM education, the study reviews publications on this topic, describes the concept of augmented reality, the analysis of augmented reality technologies is carried out, which are adapted to the teaching of natural and mathematical disciplines. The role of STEM approach with augmented reality in the educational process is determined. An example of the use of augmented reality as part of a robotics project is given.
The effectiveness of GitHub cloud services for implementing a programming training project: students’ point of view
Authors: Glazunova O G , Parhomenko O V , Korolchuk V I , Voloshyna T V
Published: March 2021

In today’s IT industry, it is important to develop the ability of IT students to collaboratively develop software, professional and personal skills. An effective method for developing such skills in future IT specialists is to organize different types of educational projects related to different programming technologies during the execution of mini projects, group and individual project assignments, term papers, academic training within the academic disciplines. The paper summarizes the results of a pedagogical study involving 29 expert students who study Computer Science and Software Engineering and used cloud service for GitHub collaborative IT development projects. The research findings testify, the most effective characteristics of this service, according to experts, identified the possibility of collaborative development of software (i1), the convenience of bug tracking (i3) and the convenience of the code editor (i7). It offers examples and results of using GitHub cloud service in the process of executing educational projects by future IT specialists.
Approaches, models, methods and means of training of future IT-specialists with the use of elements of dual education
Authors: Tryus Y V , Herasymenko I V
Published: March 2021

The article substantiates the necessity and expediency of using the dual form of education in training specialists in the field of information technology in technical universities of Ukraine, interprets the concept of “dual education” from various sources, including UNESCO documents and the Law of Ukraine “On Education”, analyzes some international experience of using dual study in higher education, in particular in Germany, considers the tasks to be solved for successful implementation of the dual form of higher education in Ukraine, and the main stages of this implementation for the period up to 2023. The paper considers some existing models of dual education that can be used in domestic universities. Also considered one of the approaches to the formation of methodological and information support for training of future specialists in information technology in the dual form of education based on distance learning support system developed on the basis of Moodle system, presented experience in implementing elements of dual education at the Faculty of Information Technology and Systems of Cherkasy State Technological University.
Analysis of some aspects of the implementation of the integrated course “Science” in the educational process of schools in Ukraine
Authors: Nechypurenko P P , Selivanova T V , Fedorynova N Ye
Published: March 2021

The integrated course “Science” is being introduced into school curricula in Ukraine for the first time. The article analyzes the experience of implementing an integrated course “Science” in schools of Ukraine. The advantages and disadvantages of various curriculum projects of the integrated course “Science” are discussed. The analysis of the content of the project No 2 of the curriculum of the integrated course “Science” is made. Based on the results of two years of work on the implementation of the experimental integrated course “Science” in the profile school, the analysis of the main problems that arose during the implementation of this course and discusses possible ways to solve them.
Development of soft skills of teachers of Physics and Mathematics
Authors: Sultanova L , Hordiienko V , Romanova G , Tsytsiura K
Published: March 2021

The article considers the problem of the development of soft skills of teachers of Physics and Mathematics in higher educational institutions in the process of certification training in the system of postgraduate pedagogical education of Ukraine. The experience of foreign countries on the relevant teachers’ course training has been analyzed, the essence and significance of such soft skills as sociability, creativity, empathy for the professional development of teachers of Physics and Mathematics in higher educational institutions in the process of certification training has been characterized. The state of these skills development in teachers of Physics and Mathematics was studied, the average level of the development these skills has been stated. The possibilities of the soft skills development were determined, the four-stage process of their transition from unconscious incompetence to unconscious competence in the system of postgraduate education was substantiated. The principles, forms, methods, technologies of the development of soft skills in the system of certification training of teachers of Physics and Mathematics were discussed with the emphasis placed on the role of heuristic methods and forms, creative technologies of the soft skills development.