bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of an atrioventricular block prediction of method for portable heart monitoring system
Authors: Bekbay Ainur , Alimbayeva Zhadyra , Alimbayev Chingiz , Bayanbay Nurlan , Ozhikenov Kassymbek , Mukazhanov Yerkat 
Published: July 2022

The object of the study is a portable system that allows real-time monitoring of the state of the heart for the timely provision of medical care. The task of detecting atrioventricular (AV) blocks in the conditions of free motor activity of the patient is being solved. To develop a method for detecting AV block, models of the electrical activity of the heart were used to take into account the spatiotemporal organization of the process of spreading excitation, analyze the dynamics of the behavior of the cardiovascular systems (CVS) for any value of the period of atrial excitation, and assess the degree of fitness of the CVS. The proposed method made it possible to determine the heart rate (HR) at which the development of AV block is possible. AV block of the III degree – heart rate 304 bpm; AV block of the II degree with the loss of half of the impulses – heart rate 260 bpm; AV block II degree with loss of individual impulses – heart rate 234 bpm; AV block of the 1st degree – heart rate 200 bpm. Prediction of AV block allows assessing the degree of “training” of the patient’s heart. The obtained quantitative results are consistent with the heart rate values known to modern health care. The developed method was implemented on the basis of a portable ECG monitoring system previously developed by the authors. Tests of the portable ECG monitoring system indicate an increase in the sensitivity and specificity of diagnosing cardiac arrhythmia and confirm the achievement of the goal of this study: improving the efficiency of diagnostics and expanding the functionality of the portable ECG monitoring system
Devising preventive actions in the production of broiler chickens using ultraviolet radiation for long-term storage based on risk analysis
Authors: Tungyshbayeva Ulbala , Uazhanova Raushangul , Tyutebayeva Kamilya , Balev Desislav 
Published: July 2022

The development of local poultry farming and import substitution are the main solutions to ensuring the safety of products in any state. For the effective development of poultry farming, it is necessary to overcome one of the constraining factors ‒ the insufficiency of a modern safety monitoring system throughout the food chain. Especially in the development of the system of deep processing of poultry meat ‒ starting from pre-slaughter keeping, cutting, preparation of semi-finished products, etc. In this regard, the current study has considered the effect of treatment with ultraviolet radiation under a non-stationary mode at such a control-critical point as the process of pre-slaughter aging in the production of broiler chickens. Additionally, this study was conducted in order to reduce the risks of increasing microbiological hazards at the production stage. As a result of the study, intermediate production control was established, and it was proved that in order to increase the shelf life of chilled meat of broiler chickens, it is advisable to sterilize with UV radiation in doses of 200 mJ/cm to 254 mJ/cm. A reduction in the risks of reproduction of potentially pathogenic microflora in poultry meat has been achieved at a cooling temperature of the carcass from +2 °C to +25 °C for no more than 135 days of risk. Research into the microbiological indicators of slaughter products of broiler chickens makes it possible to conclude that it is possible to use a given treatment in order to improve the quality and safety of finished products. Additionally, studying the effect of ultraviolet radiation on the inactivation of a number of microorganisms is very important for reducing pathogenic microbiological indicators in intermediate production control. The data reported here make it possible to prolong the period of sale and storage of the resulting product
Characteristics investigation of composite electrochromic films based on Ni(Oh)2, polyvinyl alcohol, and polyvinylpyrrolidone
Authors: Kotok Valerii , Kovalenko Vadym , Mikolasek Miroslav , Ondrejka Peter , Zima Oleksandra , Anataichuk Inna , Vodopyan Dmitriy , Sukhyy Kostyantyn 
Published: July 2022

The cost of electrochromic “smart” windows ranges from 200–800 USD/m2. The high cost is determined by the small volume of production and the high cost of vacuum methods for applying device layers. The development of other methods could lead to lower costs and further mass use of “smart” windows.
The paper presents the work on improving the electrochemical method of deposition of electrochromic films based on Ni(OH)2. Composite electrochromic films were deposited from Ni(NO3)2 solutions with the addition of water-soluble polymers – polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), and mixtures thereof. Two PVA grades and one PVP grade were used in the experiments. As a result, six films were obtained from solutions of different compositions and concentrations of polymers.
An investigation of the optical properties of the films in the initial state showed that there is no intense absorption of light in the entire visible spectrum and the transmission corresponds to a glass substrate. Thus, the formed electrochromic films will not produce tints and visible light absorption in the finished electrochromic element.
The electrochemical and electrochromic characteristics of the films differed significantly depending on the amount and specific polymers used. The film obtained from a solution containing PVA grade 24-99 was the most electrochemically active, while the best electrochromic characteristics were in the film deposited from a solution of a mixture of PVP grade 24-99 and PVP. Moreover, the films obtained in solutions containing separately PVA grade 24-99 and PVP had worse electrochromic characteristics, and the electrochemical characteristics were the same or worse relative to the film obtained in a mixture of polymers.
The results of the method of electrochemical impedance spectroscopy showed compliance with the found electrochromic and electrochemical characteristics of the formed films.
Application of mathematical methods and machine learning algorithms for classification of X-ray images
Authors: Shekerbek Ainur , Serikbayeva Sandugash , Tulenbayev Murat , Bakanov Galitdin , Beglerova Svetlana , Makovetskaya Anastassiya 
Published: July 2022

The relevance of the topic, in particular, if to take one of the information flows, whether it is the action of a human factor or a specific object, then it is true that special processing of the machine learning language and automatic information output significantly optimize human life. With the help of neural networks and their chest radiography is one of the most accessible radiological studies for screening and diagnosis of many lung diseases a special machine learning language is to study the flow of information about it and the same object in real time using neural networks.
The article describes the terminology of the problem of X-ray recognition using machine learning methods and algorithms, examines the relevance of the problem, and analyzes the current state of the problem in the field of X-ray recognition. The aspects of the problem being solved, identified during the analysis, in the form of solved problems, approaches, methods, information technologies used, tools and software solutions to the problem are noted
The paper is devoted to the description of a modified method of fuzzy clustering of halftone images, which at each iteration performs a dynamic transformation of the source data based on a singular decomposition with automatic selection of the most significant columns of the matrix of left singular vectors. The results of experimental studies were obtained by processing X-ray images.
As a result of testing a neural network model, in the output layer of which a sigmoidal activation function was used to activate neurons, and an algorithm was used as an optimization method, the best values of accuracy and completeness were obtained: accuracy – 94.2 During testing, the neural network showed an accuracy of pneumonia recognition equal to 94,27 %
Development of technology for obtaining coal-water fuel
Authors: Nussupbekov Bekbolat , Khassenov Ayanbergen , Nussupbekov Ulan , Akhmadiyev Bektursin , Karabekova Dana , Kutum Bayan , Tanasheva Nazgul 
Published: July 2022

The object of the study is coal sludge and coal fines of the Shubarkol deposit and the Kuznetsk coal basin (Republic of Kazakhstan) for the production of coal-water fuel, which allows replacing liquid and gaseous expensive products. The resulting fuel (after treatment of coal seams and burial) from industrial waste should not harm the environment, which requires certain economic investments. For crushing coal and coal sludge in the crushing and grinding unit, an electrohydroimpulse device for fine grinding of materials was used, consisting of a control unit with a protection system, a pulse capacitor and a high-voltage generator (capacitor bank capacity 0.75 µF, pulse discharge voltage 15–30 kV, length of the interelectrode distance 7–10 mm). After grinding, fine coal particles rise to the surface of the water, and impurities settle at the bottom of the device, which allows enriching the product (flotation). Surface structures and coal fraction sizes were obtained using a Tescan Mira 3 scanning electron microscope. The main characteristics of coal-water fuel during vortex combustion were: the diameter of the fraction 0–250 microns – 63–74 %, process water – 36–24 %, special additive – 1–2 %. Coal-water fuel is similar to liquid fuel, and when transferring heat-generating plants to combustion of suspension, no significant changes in the design of boilers (units) are required. This makes it easy to mechanize and automate the processes of receiving, feeding and burning fuel, and the vortex combustion technology at a temperature of 950–1,050 °C guarantees fuel efficiency of more than 97 %. The given optimal parameters of electrohydroimpulse technology when introduced into production will allow not only grinding, but also enriching the coal product
Determining the rational parameters for processing spent etching solutions by ferritization using alternating magnetic fields
Authors: Kochetov Gennadii , Samchenko Dmitry , Lastivka Oles , Derecha Dmitry 
Published: July 2022

This paper reports the results of studying the application of a ferritization method for the integrated purification of used etching solutions. A feature of this work is the use of energy-saving activation of the process by alternating magnetic fields. Its advantages are shown in comparison with traditional thermal activation. The influence of magnetic induction amplitude and key technological parameters of ferritization on the quality of cleaning an etching solution has been studied. The qualitative and quantitative composition of sediments obtained after the ferritization of etching solutions was investigated.
Used etching solutions are large-tonnage waste of industrial enterprises. They contain harmful pollutants that have a detrimental effect on the environment. It is promising to treat these solutions in order to obtain valuable commodity products.
It is established that with an optimal value of magnetic induction amplitude of 0.1 Tl, the degree of extraction of iron ions from the solution reaches a value of 99.99 %. The best values for the main technological parameters of the process have been determined: the concentration of iron ions in the reaction mixture is 6.6 g/dm3; pH, 11.5; the duration of ferritization is 15 min. The residual concentration of iron ions in purified solutions does not exceed 0.3 mg/dm3. Thus, according to the norms of current standards, they can be reused in production. Comparative analysis indicates the advantages of electromagnetic activation of the reaction mixture. The phases of magnetite Fe3O4 and iron monohydrate δ ‒ FeOОН were detected by the method of X-ray phase analysis in ferritization sediments. It is established that with an amplitude of 0.1 Tl, the sediment contains only magnetite. The study's results indicate the possibility of further use of sediments for the manufacture of important ferromagnetic substances.
The application of the improved ferritization process in production will achieve less energy consumption compared to well-known processing technologies
Ensuring the seismic resistance of a building using a geotechnical seismic insulating screen
Authors: Bessimbayev Yerik , Zhambakina Zauresh , Niyetbay Sayat 
Published: July 2022

This paper considers the issue related to the protection of buildings and structures against seismic influences and the prevention, exclusion, or reduction of seismic hazards. The catastrophic destruction of modern «earthquake-resistant» buildings in Turkey and Taiwan has shown that existing methods of strengthening and reinforcing structures are not perfect and require further study. Analysis of existing approaches to ensuring seismic resistance showed that seismic insulation and seismic suppression systems still do not have a scientific and technical justification for the effectiveness of their operation from the point of view of ensuring the stability of structures. The estimation-dynamic models of the «base-seismic insulation-structure» system developed to date do not always make it possible to simulate the joint work of their interaction during an earthquake and account for the transformation of the seismic impact on the structure. An alternative technique has been devised, a geotechnical seismic insulation screen, as a seismic insulation system that reduces the intensity of seismic loads on the structure and ensures its seismic resistance. In a specific example, the effectiveness of this seismic insulation system is confirmed. This seismic insulation technique in the form of damper screens is characterized by reliability and manufacturability in ensuring the seismic resistance of objects under construction.
The results of computational and experimental modeling of the interaction of an earthquake-insulated structure with a ground base found that the values of axial forces and bending moments in a building with a seismic insulating screen are less than in a building without seismic insulation by 30‒40 %.
The geotechnical seismic insulation screen makes it possible to advance the development of new seismic insulation techniques and determine their effectiveness. This technique will also be effective when strengthening the base and seismic insulation systems of historical monuments, protecting them against seismic and dynamic influences.
Using deep learning to design an intelligent controller for street lighting and power consumption
Authors: Bakri Bilal Ibrahim , Abid Yaser M. , Ali Ghaidaa Ahmed , Mahdi Mohammed Salih , Omran Alaa Hamza , Jaber Mustafa Musa , Jalil Mustafa A. , Kadhim Roula AJ. 
Published: July 2022

Street lighting is very important now-days especially at dangerous areas and highways but it consume a lot of power and it became challenging for many researchers in the past few years. Enormous efforts have been placed on the issue of reducing power consumption in illuminating cities and streets, researchers had various approaches and methods in tackling this challenging matter, till now there is no ideal system that has been developed to reduce the electricity usage. In this paper intelligent controller based on deep learning proposed to control the light at the street from sunset to sunrise, the system will decrease the light used to illuminate the streets in the absence of movements, the network trained based on deep learning with several image of different objects to help the system detecting any moving objects in the street to provide the street with the exact amount of light needed in order to reduce the waste of electrical energy resulting from street lighting and to help reduce accidents hence high percentage of criminal activity and life threatening conditions occur in the absence of light. The system was trained with a vast and diverse dataset to assure the accuracy and efficiency of the proposed system, the trained system showed a result of 90 precision of detecting moving objects, the proposed system was tested with a new dataset to assure the reliability and dependency of the system and reducing the errors to the minimum, the system shows promising results in detecting movements and objects, after the detection being complete, the system will send a pulse width modulation causing a 20 % light dimming, leading to enormous reduction in the power consumption, adding to that the proposed system is easy to use
Devising resource-saving technologies for the production of casting from magnesium alloys using waste of metallurgical enterprises
Authors: Shalomeev Vadim , Greshta Viktor , Liutova Olga , Bovkun Svitlana 
Published: July 2022

Based on the study of the chemical composition and analysis of the physicochemical properties of waste from a number of metallurgical enterprises in the Zaporizhzhya region, the possibility of using waste as charge materials for the production of magnesium-based alloys has been established.
The possibility of using solid salt chlorinator melt (SCM) from ZTMC as a flux in the smelting of magnesium alloy instead of the flux VI-2 has been studied; its effect on the structure and mechanical properties of casting was investigated. The technological possibility of using these chloride wastes in the smelting of the ML5 alloy is shown. It was established that the use of SCM as a flux in the smelting of magnesium alloy contributes to the grinding of the structure and improvement of the mechanical properties of the metal of experimental smelting.
The possibility of modification of foundry magnesium alloy with graphite powder (GP), which is the waste from JSC "Ukrgrafit", is investigated. It is shown that the optimal GP additive in the volume of 0.05...0.3 % contributes to the grinding of metal grain and increases its strength characteristics due to additional strengthening of both solid solution and eutectoid. It is established that carbon changes the parameters of eutectic transformation, as a result of which, with an increase in its concentration in the alloy, the volume of eutectoid of type δ+γ (Mg4Al3) decreases markedly.
Testing the proposed waste for the smelting of the M5 alloy showed that no changes in melting technology are required while the environmental safety of the devised technological process meets the established standards; their quality was improved while increasing the strength limit by 25 %, and plasticity by 30 %.
At the same time, the use of waste in the smelting of magnesium alloys can reduce costs in its production, and improve the environmental situation due to the fact that waste is not disposed of at landfills but reused in metallurgical industries
TOOLS FOR SELECTING A SOFTWARE DEVELOPMENT METHODOLOGY TAKING INTO ACCOUNT PROJECT CHARACTERISTICS
Authors: Seniv M. M. , Kovtoniuk А. М. , Yakovyna V. S. 
Published: July 2022

Context. In the software development process, the choice of a software development methodology is one of the important stages that significantly affects the success/failure of the project. The choice of the optimal development methodology depends on many factors and is a time-consuming and nontrivial task.
Objective. Therefore, there is a need to develop an effective and flexible software tool for selecting the best software development methodology that would automate this process and take into account the key characteristics of the project.
Method. This article presents an algorithm for selecting a software development methodology using methods of multi-criteria analysis and expert evaluation, which provides for gathering of the expert evaluation and implements the process of selecting the methodology using such methods as AHP, TOPSIS and Weighted Sum.
Results. Using the above-mentioned algorithm, a software system was developed for selecting the best software development methodology depending on the characteristics of the project, where the criteria weights provided by experts were taken into account and the AHP method was applied to determine user priorities regarding the criteria for the methodology comparison. The TOPSIS and Weighted Sum method were chosen to calculate the estimates of the methodology selection. The software tool provides for the output of useful details of the selection results, namely, an expert evaluation of the specified parameter values in relation to all methodologies, and it can be used to improve the efficiency of the software development process in terms of automating the provision of recommendations to IT project managers.
Conclusions. The algorithm for selecting a software development methodology was developed, which, unlike the existing ones, provided for gathering of expert evaluation, taking into account the values of the criteria set by a user independently, and implemented the process of selecting the methodologies using such methods of multi-criteria analysis as AHP, TOPSIS and weighted sum. Using the above algorithm, a software system was developed for selecting the best software development methodology, depending on the characteristics of the project, where the criteria weights provided by experts were taken into account, and the AHP method was applied to determine user priorities for methodology comparison criteria. TOPSIS and weighted sum methods and were chosen to calculate the scores of methodology choice. The software tool provides for the output of useful details about the selection results, namely, an expert evaluation of the set parameter values regarding all methodologies.
Соотношение полов во внутрирегиональной миграции в России: пространственная и возрастная дифференциация
Authors: Герасимов Александр Александрович 
Published: July 2022

Миграция – один из ключевых процессов, формирующих возрастно-половую структуру населения. Внутрирегиональная миграция, на которую в России за 2016–2020 гг. пришлось 39% миграционного оборота, за счёт следования центростремительному тренду оказывает значительное влияние на население многих территорий. Изучение половых диспропорций в миграции позволит лучше понимать её влияние на возрастно-половую структуру населения, рождаемость, брачность и местные рынки труда. Данная статья нацелена на выявление различий участия мужчин и женщин во внутрирегиональной миграции.
В работе были использованы данные о возрастно-половой структуре населения муниципалитетов и числе прибывших и выбывших по полу и возрасту за 2016–2021 гг. из базы данных показателей муниципальных образований (БДПМО). На основании этих первичных данных были рассчитаны коэффициенты прибывших и выбывших на 1000 жителей по отдельным возрастно-половым группам за 2016–2020 гг. Также отдельно были рассчитаны соответствующие стандартизованные коэффициенты для возрастов 15–29 лет, наиболее миграционно «активных», и 40+ лет. Отдельно рассмотрен кейс Центральной России.
Результаты исследования показали, что женщины проявляют более высокую миграционную активность в возрастах до 40 лет, мужчины – свыше 40 лет, причём на всех типах территорий. Более высокая миграционная активность женщин в молодых возрастах связана с большей вовлеченностью в образовательную миграцию, меньшими возможностями для трудоустройства на периферийных территориях, а также потенциально более частой сменой места регистрации при заключении брака, рождении детей и их устройстве в дошкольные учреждения и школы, мужчин в старших возрастах – вероятно, с тем, что они значительно реже, чем женщины, в одиночку ухаживают за детьми после развода или за пожилыми родственниками, что делает их менее ограниченными в вопросе миграции.