bluuebunny/crossref_metadata_2025 huggingface dataset:
Using of microsilica for improvement of physical and mechanical properties of epoxide-based composite material
Authors: Kokayeva Gulnara , Niyazbekova Rimma , Serekpayeva Mira , Ibzhanova Ainur , Bekeshev Amirbek
Published: September 2023

Utilization of industrial waste and secondary raw materials, in particular, in the production of metallic silicon and silicon-containing alloys, which include silica vapors (microsilica), is the main task of implementing environmental policy and solves the problem of their storage and negative impact on the environment, in order to reuse them in polymer composites. The use of microsilica as a filler in composite materials based on epoxy resins contributes to a positive effect on the basic properties of the resin, and also makes it possible to use the composite material as coatings and parts in the repair of machinery and equipment. The aim of the work was to establish the positive effect of microsilica as a filler in composite materials based on ED-20 epoxy resin on improving the physical and mechanical properties of composite materials. Within the framework of this work, studies were conducted to test composite materials based on ED-20 epoxy resin, differing in different filler content of 2, 5, 10, 15 wt. % on impact strength, tensile strength and modulus of elasticity, adhesion and impact strength of the coating.
The analysis of the obtained results showed a positive effect of microsilica as a filler in composite materials based on ED-20 epoxy resin on the physical and mechanical properties of the composite material. The optimal filler content was determined, which is 2 % of the mass of the ED-20 epoxy resin, while an increase in adhesion, toughness of the composite material by 45 %, tensile strength and modulus of elasticity by 21 % and 5 %, respectively, and the strength of the coating on impact by 32 %, compared with the addition of microsilica in ED-20, which shows the prospects of using microsilica as a filler in composite materials
Development of informational-technological support for designing cutting diagrams of haberdashery parts
Authors: Chuprynka Viktor , Demkivska Tetiana , Chuprynka Nataliia , Demkivskyi Ievgen , Naumenko Bohdan
Published: September 2023

The object of research is the technological process of cutting rectangular materials into haberdashery parts.
The mathematical statement of the problem to find cutting diagrams of rectangular materials for haberdashery parts is given. The structural components of this problem and its mathematical model were described.
A method for implementing the task set is proposed, which includes the following stages:
– generation of layouts;
– generation of a set of permissible sections of one part, from a combination of two parts, and from a combination of three product parts;
– generation of cutting diagrams of rectangular materials for haberdashery parts from a combination of designed sections.
Implementation algorithms have been proposed for each of the stages of the task. The proposed algorithms were used in the development of information technology support for finding cutting diagrams of rectangular materials for haberdashery parts.
The information and technological support that was offered makes it possible to create graphic visualizations of rational cutting schemes and save them in a file. This feature allows automated cutting systems to use information about such schemes.
The developed information technology support was tested on the parts of haberdashery and showed its effectiveness. This information and technological support can be successfully used at haberdashery enterprises in preparatory and cutting production to increase the utilization of material during cutting by 1.5–2.5 %.
Thus, the proposed information and technological support makes it possible to improve the technological process of designing rational schemes of cutting for haberdashery articles
Development of a localized production model for the automotive industry, built into the concept of industry 4.0 in the kingdom of Saudi Arabia
Authors: Aljuaid Abdullah Awadh , Masood Syed Athar , Tipu Javed Ahmed Khan , Shah Imran
Published: September 2023

Saudi Arabia vision-2030 is mainly focused on industrialization to reduce reliance on oil revenue. Localized Manufacturing (LM) concept, which has gained its importance worldwide in this fast-changing technological world to meet customers’ unique needs of 21st century. Now-a-days, manufacturing industry is shifting from standard product development to customized product development keeping in view the growing unique customer-’s needs. The research objective of this research was to maximize LM Application in the Kingdom of Saudi Arabia to meet unique customers’ needs.
Automobile industry was selected to apply Industry 4.0 technologies i.e., 3D Printing/Additive manufacturing. The specifications, fulfilling the customer’s unique needs have been incorporated to manufacture the desired part by 3D printing/additive manufacturing. Data was collected from Saudi automobiles customers regarding their unique needs on a particular automobile part. Using the Product Design and Development methodology by Ulrich et al data was collected, analysed and as a result of data analysis, a model for maximization of localized manufacturing was developed for implementation of LM technique. Results shows that using Industry 4.0 concept, customers’ unique needs can be satisfied and fulfilled in less time and it will be more economical as compared to standard/conventional manufacturing/production methods. Based on the results of this research a model for maximization of localized manufacturing is developed utilizing Industry 4.0 technique
Increasing the oxidative stability of linseed oil
Authors: Sytnik Natalia , Korchak Mykola , Nekrasov Serhii , Herasymenko Vitalii , Mylostyvyi Roman , Ovsiannikova Tetiana , Shamota Tetiana , Mohutova Valentyna , Ofilenko Nataliia , Choni Inna
Published: September 2023

The object of the research is the process of oxidation of linseed oil at elevated temperature.
Linseed oil is a valuable raw material for the chemical, food, cosmetic and other industries. The use of linseed oil is complicated by intensive oxidation processes associated with a high content of unsaturated fatty acids. Therefore, an important task is to develop and improve methods of oxidative stabilization of linseed oil.
The oxidation process of unrefined linseed oil (CAS Number 8001-26-1) at a temperature of 110 °C in its original form and with the addition of antioxidants was studied. The effect of antioxidant concentrations (tocopherol, butylhydroxyanisole and butylhydroxytoluene) in the mixture on the induction period of linseed oil was found. The induction period was determined by differential scanning calorimetry. The total concentration of the mixture of antioxidants in each experiment was 0.02 %. The induction period of the initial oil was 155.31 min. Rational ratios of antioxidants in the mixture were found: tocopherol: butylhydroxyanisole (50:50) %; tocopherol: butylhydroxytoluene (50:50) %; tocopherol: butylhydroxyanisole: butylhydroxytoluene (33.33:33.33:33.33) %. At the same time, the oil induction periods are 295.7 min., 290.1 min. and 290.2 min., respectively.
The quality indicators of the initial linseed oil and with the addition of the determined rational ratios of antioxidants after 2 hours of aging at a temperature of 110 °C were determined. The peroxide values of the samples were 8.5, 3.2, 3.6, 3.7 ½ O mmol/kg, respectively.
The research results make it possible to introduce antioxidants in the production of linseed oil in rational concentrations. This will help increase the production of linseed oil resistant to oxidation at elevated temperatures, which will provide various industries with high-quality raw materials
Investigating cavity formation in an electric arc zone during out-of-furnace processing of steel
Authors: Ruban Volodymyr , Stoianov Oleksandr , Niziaiev Kostiantyn , Synehin Yevhen , Zhuravlova Svitlana , Malii Khrystyna
Published: September 2023

The object of this study is the interaction zone between a graphitized hollow electrode (GHE) and a metal bath on the «ladle-furnace» installation.
The regularities of the formation of the geometric parameters of the hole were established for the purpose of further evaluation of the heat exchange under the electrode in the arc combustion zone under different operating conditions of the «ladle-furnace» installation.
An experimental methodology was devised, and a laboratory setup was built for physical simulation on a cold model. The values of the geometric parameters of the cavity formed by the electric arc discharge in the sub-electrode zone were calculated. In particular, the area of the curved surface of the cavity is about 0.2 m2 at a depth of 40 mm. The regularities of formation of the geometry of the cavity during gas injection through the GHE channel have been established, in particular with regard to the area and depth of the cavity. Thus, with a gas consumption of 3–20 m3/h and a slag cover height of 100 mm, the area reaches 0.28–0.5 m2, while the depth of the cavity ranged from 5 cm to 19 cm, respectively. Rational flow rates of gas supplied through the channel of the graphitized hollow electrode were established, which for a slag cover of 100 mm are 3–6 m3/h and for a slag cover of 200 mm – 6–10 m3/h.
The peculiarities of the formation of a metal cavity in the sub-electrode zone under the conditions of gas supply through the channel of a graphitized hollow electrode during out-of-furnace processing of steel at the «ladle-furnace» installation were investigated.
The patterns of the formation of the geometry of the cavity in the arc combustion zone, which were obtained using cold modeling, could subsequently make it possible to perform calculations of heat transfer from the electric arc discharge to the metal bath. That will also make it possible to determine the share of heat absorbed by slag and metal under the conditions of using a conventional electrode, and a hollow one with gas supply through its channel during out-of-furnace processing of steel at the «ladle-furnace» installation
Identifying the influence of transient thermal tensioning treatments on minimizing distortion and improving fatigue behavior of steel welded
Authors: Wibowo Heri , Surahmanto Fredy , Ilman Mochammad Noer
Published: September 2023

Due to the cost efficiency of welding repairs, the use of transient thermal tensioning (TTT) has begun to be applied to minimize distortion and residual stresses, particularly on thin plates. However, it requires a long preheating time especially on large structures, so that the efficiency of welding process cannot be maximized. Application of TTT treatment using flame heater on TTT treatment which require no preheating time so that welding efficiency can be increased. The aims of this study are to investigate the TTT treatment in reducing distortion, investigate the effect of TTT treatment on tensile strength and hardness, investigate the microstructure and its effect on tensile strength and hardness, investigated the effect of TTT treatment on fatigue crack growth rate. In this research, TTT treatment was performed by flame heating on the both side of weld line integrated in welding process. Temperature in both side plates were controlled and measured using thermocouple. The tests on the weld joints were carried out including distortion measurement, microstructure examination, hardness measurement, tensile test and fatigue test. Results showed that the TTT (60) treatment is the most effective in decreasing the longitudinal distortion which placing the flame heating a 60 mm behind welding torch. It tends to increase the tensile strength of weld metal supported by its increasing hardness. The increase in the percentage of the acicular ferrite phase is linearly related to the tensile strength and hardness of the weld joint. The fatigue behavior could be improved by TTT treatment (60) which is associated with the effect of decreasing residual stress in the weld metal region. This treatment is the best parameter in an effort to increase the welding efficiency of the TTT method
Developing a new encryption algorithm for images transmitted through WSN systems
Authors: Kadhim Sanaa ahmed , Yas Ruwaida Mohammed , Abdual Rahman Saad abdual azize , Abd Sura Khalil
Published: September 2023

Wireless sensor networks (WSNs) have up until now faced many challenges because of their open, wide-ranging, and resource-limited nature, including security, efficiency, and energy consumption. In the military system, it is essential to provide high-level security to the significant data over wireless network which is proved to be unreliable public communications. To solve the above problem, high level of security with minimum complexity should be applied to be adequate to limited capabilities of transmission system. This paper presents a new algorithm named (SRS) for encrypting transmitted military images to keep them from getting hacked or broken by WSN. The SRS algorithm is designed to be lightweight, fast, and secure, taking into consideration the limited capabilities of the transmission system. It is implemented as a public key cryptosystem specifically designed for image encryption. The algorithm consists of two parts: encryption and decryption. The proposed system suggested some equations and calculations that are applied to the plain and coded images after being transmitted over the WSN. The results of testing the simulation model demonstrate the effectiveness of the system by evaluation using various metrics such as Signal-to-Noise Ratio (SNR), Mean Squared Error (MSE), and Peak Signal-to-Noise Ratio (PSNR). Overall, the paper presents a new encryption algorithm, SRS, specifically designed for securing military images transmitted over wireless sensor networks. The algorithm aims to provide a balance between security, efficiency, and energy consumption, considering the resource-limited nature of WSNs. The simulation results indicate the improvement of the proposed system by 13 %, 10 %, and 55 % in packet delivery ratio (PDR), throughput, and dropping ratio, respectively, and it shows that the suggested SRS method increased execution time by 67 % compared to RSA based algorithm
Wide band and high gain microstrip antenna using planar series array 4×2 element for 5G communication system
Authors: Alam Syah , Surjati Indra , Sari Lydia , Ningsih Yuli Kurnia , Suryadi Suryadi , Trihantoro Galang , Firmansyah Teguh , Zakaria Zahriladha
Published: September 2023

The 5G communication system requires an antenna as a receiving device that has high performance including wide bandwidth and high gain. Microstrip antennas have advantages such as low cost, suitable for high frequencies and easy to integrate with other devices. One of the disadvantages of microstrip antennas is their narrow bandwidth and low gain. Therefore, microstrip antennas with wide bandwidth and high gain are especially needed to support 5G communication systems. This paper provides a solution by proposed a wide bandwidth and high gain microstrip antenna operating at a resonant frequency of 3.5 GHz for a 5G communication system. The proposed antenna was developed in four stages starting from a single element, a two-element series array, a 4-element series array and a 4×2-element planar series array. A series planar array technique is proposed to increase the gain and bandwidth of the microstrip antenna simultaneously. In this paper, simulations and measurements from the proposed antenna are displayed and compared comprehensively to show the performance improvement from each stage of the development of the proposed model. Based on the measurement results, the designed antenna has an impedance bandwidth (IBW) of 0.6 GHz and fractional bandwidth (FBW) of 17.14 % with a frequency range of 3.11–3.71 GHz and maximum gain of 12.2 dB at a resonant frequency of 3.5 GHz. The bandwidth and gain of the antennas increased by 205 % and 99.03 % compared to single element antennas, respectively. Therefore, the proposed antenna can be recommended to be used as a receiving antenna for 5G communication systems
Design of a universal apparatus for heat treatment of meat and vegetable cooked and smoked products with the addition of dried semi-finished products of a high degree of readiness to the recipe
Authors: Zahorulko Andrii , Zagorulko Aleksey , Savytska Nataliia , Minenko Sofiia , Pugach Andrii , Ponomarenko Nataliia , Zakharchenko Ruslan , Pikula Oksana
Published: September 2023

The object of the study is the process of smoking a molded meat-vegetable product with the addition of a dried semi-finished product of a high degree of readiness based on Jerusalem artichoke, zucchini, and carrots.
Combined health products will satisfy the demand of end users for functional products of the new generation and will solve the technological problems of manufacturers in accordance with European competitiveness procedures. They will expand the offer of products with rational nutritional, taste, aesthetic characteristics that will meet the modern trends of craft producers, NoReCa business, and consumer expectations.
A universal device for heat treatment of meat and vegetable products under hot and cold smoking conditions has been designed based on a film-like resistive electric heater of the radiating type. The device uses Peltier elements placed on the outer surface of the smoke generator and, at a temperature of 45 °C, they form a low-voltage power supply (~3...4 W) from the conversion of secondary heat. Cold smoking is carried out in the temperature range up to 25 °С, provided that the outer surface of the heater is covered with a coil heat exchanger through which the coolant passes. During hot smoking, the air medium is in the heat exchanger (additional thermal insulation of the chamber).
The uniformity of the temperature field of the meat-vegetable product (meatloaf with a diameter of 0.08±0.01 m) during hot smoking has been confirmed, provided that the center of the loaf reaches 65 °C and the total duration of the process is 5.5 hours. The introduction of dried semi-finished products of a high degree of readiness into the recipe of meat loaves increases the yield of the product by 18 % and the mass fraction of protein by 25 %. The moisture retention capacity of the experimental meat product increases by 11 % with a 33 % decrease in calorie content, which indicates an improvement in its quality indicators compared to the analog
Ensuring sustainable development of a region in the strategic period
Authors: Prokhorova Viktoriia , Zalutska Khrystyna , Fedorova Yuliia , Obydiennova Tetiana , Prykhodchenko Oksana
Published: September 2023

The stability of the region's development, like any system, depends on the effective balance of its subsystems. The effectiveness of subsystems is enhanced by the effective performance of a set of their key components, which depends on the optimization of certain elements by establishing rational relationships between them. Accordingly, the object of the study is the process of rationalization of the constituent elements of territorial community development programs. To solve this issue, a methodical approach to determining the level of development of the region and ensuring its stability in the strategic period is proposed through the rationalization of the effects of mutually determined implementation of business processes of alternative development projects of territorial communities. The expediency of using the coefficient of synchronicity of business processes of certain regional development projects to determine the level of regional development was substantiated. The use of the synchronicity coefficient to ensure the stable development of the respective region is due to the obtained possibility of balancing the specific competitive advantages of territorial communities strengthened by certain effects. These effects are the results of the implementation of optimally formed portfolios of development projects through rational relationships between specific business processes based on the principle of maximum adaptability of their components. The value of the coefficient of synchronicity of the business processes of the portfolio of development projects of Zabolottivsʹka UTC (0.637) made it necessary to take possible measures for their rationalization by implementing individual effects from the interaction of specific business processes. That has made it possible to increase the synchronicity of these business processes to 0.816 and to determine the direction of the possible integration of the studied UTC with other communities with the help of the formed development potential reserves
Technology improvement obtaining powdered dried honey
Authors: Tultabayeva Tamara , Chomanov Urishbai , Tultabayev Mukhtar , Shoman Aruzhan , Zhumanova Umyt , Kasymbek Rabiga , Tultebayev Bakhtiyar
Published: September 2023

The object of the study is the production of powdered dried honey. The limited use of honey in the food industry is due to its physicochemical properties. Viscosity and stickiness create problems during its dosing, mixing, storage and transportation.
Honey in powder form has a high commercial potential. The great advantages of using dry honey are the reduction of storage space, ease of processing and dosing.
Honey is characterized by organoleptic and physico-chemical parameters affecting the drying process and the quality of the final product.
The resulting powdered dry honey, in compliance with the drying modes recommended by us, has retained all its useful biological properties. The water content, as well as the dry matter content in fresh and dried honey met the criteria for the composition of honey.
Consequently, reducing the water content during the drying process significantly contributes to increasing the stability of honey during storage.
The developed technology provides for reducing the drying temperature to 50 °C, which also has a positive effect on the nutritional value of the final product
It is established that the maximum proportion of frozen moisture in the sublimation process is observed at temperatures from minus 30 °C to minus 40 °C, depending on the types of honey, and an increase in the drying temperature above 40 °C shortens the duration of the drying process, but may affect the quality of the product.
Powdered honey is in demand in the food, pharmaceutical and cosmetic industries, due to increased dosing accuracy due to the flowability of dried honey. However, it should be borne in mind that dried honey is very hygroscopic due to the presence of sugars and the amorphous state after drying
Establishment of patterns in the thermal modification of dry pine wood
Authors: Tsapko Yuriy , Horbachova Oleksandra , Likhnyovskyi Ruslan , Mazurchuk Serhii , Tsapko Аleksii , Buiskykh Nataliia , Matviichuk Andrii , Slutska Oksana , Korolova Olena , Khromenkov Dmytro
Published: September 2023

One of the methods of ensuring the durability of dry wood during operation is its thermal modification, which inhibits the life processes of the fungus of the Ceratostomaceae family and leads to a change in its structure and properties. Therefore, the object of research was thermally modified dry pine wood affected by a fungus of the Ceratostomaceae family. Physicochemical studies of changes in the structure of thermally modified dry pine wood showed that the samples have absorption spectra that are characterized by fluctuations of the glucopyranose ring of cellulose and are an indicator of the beginning of destructive processes. At the same time, the data of thermogravimetric analysis show the processes of water loss and decomposition of hemicellulose, cellulose, and lignin, and burning of coke residue. Bending and compressive strength of thermally modified dry pine wood shows that as the wood dries, the strength limit decreases depending on the degree of fungus damage. Namely, with an area of biological damage within 10 %, the strength limit is reduced by more than 1.2 times when modified at 200 °С/3 hours, by more than 1.9 times at 200 °С/6 hours. With an increase in the degree of fungal damage to 30÷50 %, the strength limit decreases by more than 1.6 times when modified at 200 °С/3 hours, by more than 2.1 at 200 °С/6 hours. And when affected by a fungus in the range of 80÷100 %, the wood becomes softer, more plastic, while the bending strength is reduced by 1.7 times, and the compressive strength by 1.16 times. Thermal modification of dry pine wood at 200 °С for 3 hours reduces the level of water absorption by more than 1.5 times, and for 6 hours ‒ by more than 1.7 times. The practical importance is that the results of determining changes in the structure and properties of thermally modified dry pine wood make it possible to establish the scope and conditions of its application
Performance evaluation of the cloud computing application for IoT-based public transport systems
Authors: Zakutynskyi Ihor , Sibruk Leonid , Rabodzei Ihor
Published: September 2023

The object of research is cloud computing as an element of the server infrastructure for intelligent public transport systems. Given the increasing complexity and requirements for modern transportation, the application of the Internet of Things concept has a high potential to improve efficiency and passenger comfort. Since the load generated in IoT systems is dynamic and difficult to predict, the use of traditional infrastructure with dedicated servers is suboptimal. This study considers the use of cloud computing as the main server infrastructure for the above systems. The paper investigates the main cloud platforms that can be used to develop such systems and evaluates their advantages and disadvantages. The authors developed the overall architecture of the system and evaluated the performance and scalability of individual components of the server infrastructure. To test the system, a software emulator was developed that simulates the controller module installed in vehicles. Using the developed emulator, stress tests were conducted to analyze and confirm the ability to scale and process input data by the proposed architecture. The test scenarios were developed and conducted on the basis of the existing public transportation system in Kyiv, Ukraine. The experimental results showed that the proposed IoT architecture is able to scale efficiently according to the load generated by the connected devices. It has been found that when the number of incoming messages increases from 40 to 6000, the average message processing time remains unchanged, and the error rate does not increase, which is an indicator of stable system operation. The obtained results can be used in the development of modern public transport systems, as well as for the modernization of existing ones
Development of an error correction method using perfect binary arrays
Authors: Murr Pierre , Yevseiev Serhii , Milevskyi Stanislav , Melnyk Marharyta , Katsalap Vitaliy , Pribyliev Yurii , Rzayev Khazail , Bryla Andrii , Shpak Oleksandr , Fedorka Pavlo
Published: September 2023

The research focuses on an innovative error correction method that uses perfect binary arrays (PBAs), a powerful mathematical tool with unique properties that make it ideal for error correction. The research is aimed at studying the impact of uncorrelated mixed-type errors in the data exchange path, which allows using it in smart technologies with limited computing capabilities. The effectiveness of the approach is confirmed by simulation and comparison with other error correction methods. In order to further study the structural, cross-correlation and distance properties of orthogonal two-dimensional codes and the correcting capabilities of the proposed method, an information technology system for data transmission based on an equivalent class of perfect binary arrays has been developed. The proposed model evaluates the performance of the error correction code based on perfect binary arrays under various conditions, including correlated and uncorrelated interference and data exchange paths. A generator of PBA of equivalent classes has been built. An experimental evaluation of the correcting ability of the proposed two-dimensional codes was carried out by simulating various pre-code situations, including packet and random errors, for the cases of correlated and uncorrelated interference. Using a graphical interface, users will be able to enter the number and type of errors, determine whether they are random or packet errors, manually or automatically, move errors through the data packet, and view intermediate results. Thus, the complex nature of this study can be positioned as a promising approach and a reliable choice in the field of error correction
Assessing the efficiency of application of project management in the field of engineering of innovative developments
Authors: Myronenko Oleksii
Published: September 2023

This paper investigates the peculiarities and effectiveness of using project management in the field of engineering of innovative developments. The relevance of the topic relates to the fact that the process of innovative development is characterized by its duration and the uncertainty of the probability of obtaining specific results. Such a feature determines the need to build such a project management system for the engineering of innovative developments, which would ensure the definition of sub-stages of this process, the assessment of the degree of their implementation, and the determination of the results of these stages. The object of this study is the project management system of the engineering projects of innovative developments of the company Hokord Ltd. The research used methods of statistical analysis with the distribution of data into control and test groups. This distribution made it possible to reveal the impact of the implementation of project management on the effectiveness of project management. The study solves the problem of determining the effectiveness of project management in comparison with traditional approaches to project management. The results of the study show that the implementation of project management in the field of engineering of innovative developments has led to the improvement of project management and an increase in their efficiency. Implementation of project management made it possible to establish new project statuses and reduce the share of canceled or closed projects, while the share of successfully completed projects increased. Unlike other studies, quantitative indicators of the effectiveness of project management were established - the duration of project implementation was reduced by an average of 11 %. The implementation of project management also improved the assessment and allocation of project priorities, a decrease in the share of projects with high priority, and an increase in the share of projects with low and uncertain priority was revealed
Optimization of the technological process of threshing combine harvester
Authors: Umbataliyev Nukhtar , Smailova Gulbarshyn , Toilybayev Meirambay , Sansyzbayev Kazybek , Koshanova Sholpan , Bekmukhanbetova Sholpan
Published: September 2023

To improve the operational quality of paddy combine it was proposed to include additional innovative operations in plant process of pre-threshing preparation of rice biomass with anticipating seeds selection which increases seeds separation, reduces injuries, forms stable operation of threshing-separating device of combine harvester.
Retrofit feeder house is a solution to ensure the stable uniform feed of assorted biomass into the threshing separation device. Equipped with tool package – harvester feeder house turned to the running control equipment for incoming flow of biomass.
The movement of threshed heap inside the modified geometry of feeder house with tools effectively affect on caulis, panicle of rice – screed, and brings the biomass vibration mode i. e., lead to the dynamic separation of rice headed seeds to threshing rotor. Vibration (tossing) of biomass make it possible for free rice seeds pass through caulis to the bottom of feeder house.
Development program of innovative driving devices of multifunctional rice seed harvester combine considered the development of preproduction explorational program ensuring the information on harvest loss during various rice harvesting, their separation between main harvester aggregates – collector, auger, elevator, threshing mill. It is proposed to combine, in a single complex, all the control parameters, subordinating their actions, into an active control device of the technological process, affecting the shapes of rolls formed from various varieties and yields of rice
Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states
Authors: Tkachuk Mykola , Lvov Gennadiy , Kravchenko Sergey , Moiseiev Serhii , Novikov Maksym , Burniashev Arkadii , Pakki Glib , Podrieza Serhii
Published: September 2023

One of the most rational methods of energy utilization of compressed gas in pipelines is to use turbo-expander installations. In particular, these are autonomous turbo-expander power stations. A fundamentally new concept has been devised to improve the technical and economic performance of this type of machines. This concept is not focused on a separate aspect of the plant's operation but on their entire set. In particular, physical principles, structures, and technologies were considered as an object of research. First, effective parameters of gas-dynamic flows and heat-mass transfer were determined based on the modeling of work processes. Secondly, progressive designs of turbo-expander units have been created. Thirdly, technologies for the production of parts and assemblies of turbo-expander units have been developed, which combine, unlike the traditional ones, different types of strengthening for contacting parts in their pair. A method of parametric modeling was used to substantiate the technical solutions of the elements of turbo-expander power plants. This makes it possible to determine the technical characteristics of these installations under a certain set of parameters. By purposeful variation, a recommended set of their parameters was determined, which ensure the improvement of the most important technical characteristics. A specialized database was built, which contains an array of information about the regularities of the influence of variation of significant parameters on various characteristics of turbo-expander power plants. Already on this basis, the problems of synthesis of successful technical solutions of turbo-expander power plants are solved. As a result, their high energy efficiency is ensured. Thus, the efficiency of the expander was achieved at the level of 86 % while the resource increased by 20–25 %. All these solutions were implemented in a number of unique turbo-expander units. Their effectiveness has been demonstrated during operation
Assessing the stresses and magnitude of plastic hinge in a tunnel conduit made of precast metal corrugated structures taking into account the soil backfill parameters
Authors: Kovalchuk Vitalii , Karnakov Ihor , Onyshchenko Artur , Petrenko Oleksiy , Boikiv Roman
Published: September 2023

The object of research is a tunnel conduit made of star-shaped metal corrugated structures.
The stresses and magnitude of the plastic hinge occurring in the metal corrugated structures of the tunnel conduit were investigated, taking into account the degree of compaction and the height of the soil backfill.
It was established that when the height of the backfill above the tunnel conduit made of precast metal corrugated structures increases and the degree of compaction of the soil backfill decreases, there is an increase in the values of stresses and plastic hinge in metal structures. With the height of the backfill above the conduit equal to 2.75 m and the degree of compaction of the soil backfill RP=80 %, stresses of 235.89 MPa are reached, exceeding the permissible 235 MPa. At the same time, the value of the plastic hinge is 1.03, which exceeds the normative 1.0.
It was established that at embankment heights above the tunnel conduit structures from 1.75 m to 2.0 m, the smallest difference in stresses and magnitude of the plastic hinge is observed. At RP=98 %, the stress difference is 0.66 MPa, and the value of the plastic hinge is 0.008. In the case of the height of the embankment above the conduit from 1.5 m to 1.75 m, the stress increase was 5.5 MPa, and the value of the plastic hinge – 0.031. When the embankment height increases from 2.0 m to 2.25 m, the stress difference is 7.57 MPa, and the value of the plastic hinge is 0.041.
It was determined that when the height of the embankment above the conduit was increased by 1.0 m in the range from 0.75 m to 1.75 m, the stress difference at RP=98 % increased by 27.84 MPa. However, when the height was increased by 1.0 m in the range from 2.75 m to 3.75 m, the stress difference increased by 12.66 MPa. At the same time, the value of the plastic hinge at embankment heights from 0.75 m to 1.75 m increased by 0.139, and at embankment heights from 2.75 m to 3.75 m – by 0.093
Identifying the influence of blade number and angle of attack on a breastshot type waterwheel micro hydroelectric power generator using ANOVA
Authors: Syuriadi Adi , Siswantara Ahmad Indra , Purnama Dewin , Gunadi Gun Gun Ramdlan , Susanto Iwan , Permana Sulaksana
Published: September 2023

This study focuses on optimizing the performance of micro-hydro power generation, specifically the breastshot type waterwheel. The limited availability of non-renewable energy sources and the high cost of developing renewable energy sources in the energy sector pose challenges, making it essential to find new energy sources and improve energy efficiency. The 2004–2022 national electricity plan aims to increase electricity access in rural areas, including remote regions like Bogor Regency, where access to electricity is limited. Many residents have constructed their own micro hydroelectric power generators, but their vulnerability to natural disasters is a concern. The study investigates the potential of breastshot waterwheel technology for micro hydroelectric power generation.
The study involved testing a micro hydro power plant with 6, 8, and 10 blades and blade angles of 0°, 30°, and 45°. The current research focuses on performance optimization, including the use of ANOVA analysis to know the significant impact of blade number and angle on the waterwheel’s rotation.
The maximum rotational speed was achieved with 10 blades and an angle of attack of 0°, 30°, and 45°, with respective speeds of 153.59 RPM, 155.84 RPM, and 164.95 RPM. The study indicates that the higher the number and angle of attack of blades, the greater the rotation of the breastshot type waterwheel. ANOVA tests showed that the number of blades had a significant impact on the waterwheel’s rotation, with an F-test value of 6.32 and a p-value of 0.012. On the other hand, the angle of attack of the blade had no significant impact, with an F-test value of 3.20 and a p-value of 0.067
Constructing the mathematical model of a recommender system for decentralized peer-to-peer computer networks
Authors: Mikhav Volodymyr , Semenov Serhii , Meleshko Yelyzaveta , Yakymenko Mykola , Shulika Yaroslav
Published: September 2023

Recommender systems make it easier to search with a large amount of content, supplementing or replacing the classic search output with recommendations. In P2P networks, their use can have additional benefits. Because of indexing and search problems, previously added files may not be available to P2P network users. If the user cannot find the file he is looking for, one can provide him with a list of recommendations based on his preferences and search query.
The object of research is the process of creating recommendations for users of decentralized P2P networks to facilitate data search.
The urgent task of increasing the accuracy of mathematical modeling of recommender systems by taking into account the requirements for reliability and data security during changes in the structure of a decentralized P2P network is solved.
An analytical model of the recommender system of a decentralized P2P network has been developed, the main feature of which is taking into account the requirements of reliability and security of recommendation messages. This was done by introducing the following indicators into the general model of the decentralized recommender system – the probability of reliable packet transmission and the probability of safe packet transmission. The developed analytical model makes it possible to conduct a comparative analysis of different methods of operation of recommender systems and to set acceptable parameters under which the degree of relevance does not fall below a certain threshold.
The developed mathematical model of the system based on the GERT scheme differs from the known ones by taking into account the reliability and security requirements during changes in the structure of the decentralized P2P network. This has made it possible to improve the accuracy of simulation results up to 5 %.
The proposed mathematical model could be used for prototyping recommender systems in various fields of activity
Identifying of chemical composition changes during the carburizing process of carbon steel under tension
Authors: Nitha Nitha , Arma Lukmanul Hakim , Sutresman Onny S. , Aminy Ahmad Yusran
Published: September 2023

Carburizing is a commonly employed technique used to improve carbon steel’s surface characteristics, specifically its hardness and ability to resist wear. The introduction of tension during the carburizing process adds complexities that affect the distribution of elements in the material. The research methodology includes subjecting carbon steel samples to carburizing temperatures and applying tensile stress. This approach allows for analyzing the effects of carburization and stress on the carbon steel samples. The focus of the investigation was to analyze the use of the pack carburizing technique at lower temperatures, specifically 700 °C and 750 °C, while also applying proportional-voltage tensile stresses. The study focuses on conducting a comprehensive analysis of changes in the chemical composition throughout the cross-section of the material. Advanced analytical techniques perform mapping and elemental spectrum analysis, such as scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). These techniques enable a thorough investigation of the distribution and composition of elements such as carbon, iron, silicon, magnesium, and phosphorus. According to the research findings, carbon elements were added within the temperature range of 700 °C to 750 °C during the carburization process. The carbon content in the material increased from 0.15 % in its unprocessed state to 0.73 % at a temperature of 700 °C, followed by a further increase to 1.26 % at a temperature of 750 °C. According to the study, it was found that applying tensile loads and reducing carburizing temperatures can enhance the carburizing process and result in higher carbon steel content. This can bring about cost savings and improve overall industrial efficiency
Interpretation of laboratory results through comprehensive automation of medical laboratory using OpenAI
Authors: Kadirkulov Kuanysh , Ismailova Aisulu , Beissegul Aliya , Serikbayeva Sandugash , Kazimova Dinara , Tazhigulova Gulmira
Published: September 2023

In modern medicine, laboratory tests play an important role in the diagnosis, treatment and monitoring of patients. However, the volume and complexity of the data obtained can create challenges for interpreting the results. In this paper, we present a study on the application of integrated automation of a medical laboratory using OpenAI for a more accurate and effective interpretation of laboratory results.
Interpreting laboratory results through integrated automation using artificial intelligence (AI) and other digital technologies automatically analyzes and interprets laboratory results. This approach aims to streamline the process of interpreting laboratory results and provide more accurate, consistent and timely results to healthcare providers. Comprehensive automation of the interpretation of laboratory results can improve the efficiency and accuracy of laboratory results, leading to improved patient outcomes and better clinical decision-making. However, it is essential to note that AI models are imperfect and can still make mistakes. Therefore, healthcare professionals should always review automated interpretation results before diagnosing or treating. The work presented results in applying OpenAI to interpret laboratory results in the laboratory information system smartLAB Kazakhstan, which provides a complete cycle of automation of all medical laboratory processes.
In the course of the study, an automated information system of a medical research complex using artificial intelligence was developed and implemented
Identifying of the compositions of the blended fuels of the butanol, gasoline, and water stabilized at low temperatures
Authors: Sangian Hanny Frans , Lestari Dini , Pasau Guntur , Tamuntuan Gerald H. , Widjaja Arief , Purwadi Ronny , Agnesty Silvya Yusnica , Sadjab Bayu , Sangian Messiah Charity , Thahir Ramli
Published: September 2023

The work was purposed to identify the compositions the blended fuel of butanol, gasoline, and water forming the stable emulsions at low temperatures. The previous researches reported that the blending of butanol and gasoline generally employed the synthetic surfactants which were expensive and mixed at room temperatures. It is important to analyze the stability of the substances in the wide range of temperature for it alter significantly on the surface of the planet. The references survey revealed that the works of the compositions of the wet butanol and gasoline at low temperatures are yet published. The present work was successful to blend the butanol, gasoline, and water in stable emulsion without using the surfactant and stabilized in the less of room temperature. Compositions of butanol, gasoline (RONs 90), and water emulsified and stabilized at low temperatures without synthetic surfactants were successfully studied. It was found that aqueous butanol and gasoline formed a stable emulsion at low temperatures and discovered the phase was separated if temperature declined. The compositions of pure butanol, gasoline, and water recorded in stable emulsions using butanol 85.00 % ranged from 75.08–79.24 %, 6.77–11.67 %, and 13.25–13.98 %, respectively, blended at temperatures 0.00–29.70 °C. The usage of butanol 99.50 % caused the change of compositions recorded at 0.71–11.34 %, 88.61–99.29 %, and 0.00–0.06 % blended at 0.00–29.00 °C. It was discovered that the increase of butanol percentage of the fuel after the emulsion was stable tended to the emulsion kept one phase. The emulsion fuels found would be applied to the heat-modified engines operating in wide range temperatures which were below room temperature