bluuebunny/crossref_metadata_2025 huggingface dataset:
Production of motor-wheels for prototypes of mini-electric vehicles based on new soft magnetic materials
Authors: Govor Gennady , Demidenko Olga , Zhaludkevich Aliaksandr , Normirzaev Abdukayum , Tukhtabayev Mirzokhid , Valiev Bobur
Published: December 2023

This article discusses the issue of production a motor-wheel for prototypes of mini-electric vehicles based on new soft magnetic materials. The structure and morphology of the surface obtained composite materials have studied. The density value calculated from the X-ray diffraction data is about 3% higher than the directly measured values, which are 7.7 g/cm3. Technologies and create new technical means and their effective use, the results of development and research of magnetic materials and complex technology for constructing electric motors based on them are disparate and do not allow the creation of new approaches for their mass implementation. Tests of the electromagnetic characteristics of magnetic circuits based on the materials obtained for constructing an electric drive were carried out using an express magnetometer.
Application the ZMET method to explore meme cultural design elements
Authors: Lo C.-H. , Ko Y.-C. , Wang S.-Q.
Published: December 2023

With the prevalence of contemporary social media, online memes have become one of the popular cultural and communication media. This study uses metaphor extraction techniques to explore the design elements of “memes” to attract public use or viewing. Through the ZMRT interview method, Construct is integrated, and the relationship between Attribution (A), Consequences (C) and Values (V) is established by MEC to explore the mental models and thoughts of meme map users. The results of this study show that the design elements of memes need to stimulate the user's senses, express their situation or phenomenon in a concise and clear way, arouse users' recognition and initiate sharing. At the same time, understand the reasons for the prevalence of memes, people believe that meme diagrams can express inner feelings and thoughts, and achieve emotional
Influencing of transformational leadership to the organizational loyalty of Thai Airways’ cabin crew
Authors: Kungwola K.
Published: December 2023

Airline industry is a service nature and related to labor costs, turnover is a critical issue for any airline company to pay attention as the cost of it may be high (Chen, 2006). A number of studies have suggested that leadership style was one of factors influencing employees’ level of organizational commitment (Mowday et al., 1982; Walumbwa et al., 2005). In this study, the researcher aims to determine the relationship between Bass’s model of leadership styles, transformational leadership, and the level of organizational loyalty among Thai Airways’ cabin crew. The study found that differences in personal characteristics such as age, salary, status, and length of employment have differences in organizational loyalty among cabin crew with a statistically significant at 0.05 and transformational leadership has an impact on the organizational loyalty with a statistical significance level of 0.05. This study can identify the impact of leadership behaviors of their supervisor in order to provide empirical evidences for the airline company, which could be used to develop the supervisory role in increasing organizational loyalty among their employees.
Digital transformation as a prerequisite for region`s convergence
Authors: Stoyanova Mariela , Bozhikov Asen , Tairov Iskren
Published: December 2023

The aim of this publication is to present key results of an empirical study conducted, affecting the processes of digital transformation of the municipal administration as part of the public sector in Bulgaria. The research section is by planning areas, using methods of analysis such as expert assessment, GAP analysis, induction and deduction. The main results of the study outline challenges to the transformation of the public sector such as the need to change the organizational culture of those employed in the administrations, as well as to increase bilateral interaction with citizens in order to reach a level of personalization of public services.
Analysis techniques for strategic management in the aviation sector
Authors: Süzen Ekrem
Published: December 2023

Strategic management involves the planning, execution, and control of an enterprise in order to accomplish its long-term objectives. Strategic management is employed to analyze the internal and external conditions of an enterprise, forecast potential scenarios, and optimize the future performance of the enterprise. Strategic management involves the utilization of a method to anticipate future prospects and threats for enterprises, analyze their current situation, establish objectives, and implement the necessary actions to accomplish them. Strategic management covers all enterprise activities, ranging from short-term to long-term goals of enterprises. Strategic management allows enterprises to stay in the market, acquire a competitive edge, and enhance profitability. This method is employed to assess forthcoming prospects for enterprises and solve current challenges. Within the realm of strategic management, there exist various methods employed to identify the objectives of enterprises, choose appropriate tools, execute them, and evaluate the outcomes. The specific analysis methods employed in strategic management differ based on the enterprise's purpose, sector, and internal and external surroundings. This study aims to examine the analysis methods and elements utilized in strategic management, with a particular focus on the analysis methods commonly employed in the aviation industry. Keywords: Strategic Management, Aviation Management, Business Management. Strategic Analysis Methods
Analytical calculation of bending elements with basalt fiber and glass composite rod reinforcement under short-term dynamic loading
Authors: Akramov Khusnitdin , Davlyatov Shokhrukh , Nazirov Ayubkhon
Published: December 2023

During the construction and operation of buildings and structures, in addition to static loads, short-term dynamic impacts may occur on building structures and their elements caused by explosions, accidents, etc. As a result, damage or destruction of structures may occur, which leads to possible loss of life and significant material losses. Taking into account the influence of such impacts on the load-bearing capacity of building structures is relevant. A significant number of works by domestic and foreign authors are devoted to methods for calculating bending reinforced concrete elements under static and short-term dynamic loading. In the overwhelming majority, bendable concrete elements with steel rod and/or fiber reinforcement are considered as the object of research. The issues of predicting and assessing the stress-strain state of bending concrete elements reinforced with glass-composite reinforcement and/or basalt fiber under short-term dynamic loading have not been sufficiently studied. The current building codes consider calculations of such elements only under the action of static loads.
Analysis of the ISO 9001 standard model of risk management in analytical testing laboratories
Authors: Erkaboev Abrorjon , Obidov Jamshidbek , Madmarova Umida , Alikhonov Elmurod
Published: December 2023

This article analyzed the model based on the requirements of the ISO 9001 standard in the management of existing or expected risks in analytical testing laboratories. The principles of the ISO 9001 standard were compared with the principles and capabilities of risk management. Enterprises and organizations, as well as analytical testing laboratories, are paying a lot of attention to the management of risks that arise in achieving their goals. The ISO/IEC 17025:2017 standard, which sets its requirements for the accreditation of testing laboratories, also recommends that enterprises document risk management separately. This affects the quality of work of analytical laboratories.
Influence of two-layer axisymmetric cylindrical shells on their physical and mechanical characteristics
Authors: Dusmatov Abduraxim , Nabiyev Muminjon , Baxromov Maxmud , Azamjonov Asadbek
Published: December 2023

Combined two layers axially symmetrical cylindrical clad layer, carried out from composite layer, which are differ by their thickness and physic-mechanical properties, and also the influence of SDS of such clad layers is investigated on their durability and firmness are considered in the work.
Numerical study of the efficiency of single and group centrifugal cyclones
Authors: Madaliev Murodil , Usmanov Akramjon , Usmonova Nodirakhan
Published: December 2023

Centrifugal cyclones are devices used to separate solids or liquids from gas streams using centrifugal forces. They are widely used in various industrial processes, as well as for purifying air and gases from contaminants. The work carries out numerical modeling and study of the efficiency of single cyclone SCN-50-800 and group cyclone SCN-50-400x4. The study was carried out in the engineering software package Comsol Multiphysics 6.1 using the Flow Simulation add-on, designed for modeling hydrodynamic processes. The v2-f model, which is very often used in swirling flows, was chosen as the turbulence model. The computational experiment was carried out at the same productivity of 4500 m3/h. Based on the obtained numerical data, it is shown that the efficiency of group cyclones is significantly greater than that of single cyclones.
Capillary permeability of concrete in aggressive dry hot climate
Authors: Goncharova Natalya , Abobakirova Zebuniso , Davlyatov Shokhrukh , Umarov Shodiljon , Mirzababayeva Saxiba
Published: December 2023

The article presents the results of studies carried out to determine the capillary absorption (Wsuc) of a saline solution during evaporation and to establish a cyclic temperature regime. It has been established that for a reliable assessment of the capillary permeability of concrete in a dry hot climate, it is sufficient to subject the samples to 60 cycles of preliminary alternating heating and cooling, followed by testing in a climatic chamber for capillary absorption of a salt solution at a temperature of 40 °C and a relative humidity of 30%.
Enclosing structures of a porous structure with polymeric reagents
Authors: Abobakirova Zebuniso , Umarov Shodiljon , Raximov Rasuljon
Published: December 2023

This article is devoted to the use of the polymer K-9 reagent in porous claydite-ash concrete and the design of its optimal composition according to the general design method of the optimal composition of the general theory of artificial building conglomerates (ISC). The data of experiments confirming the positive effect of the polymer reagent on increasing the durability, improving the moisture and heat engineering modes of porous concrete are presented.
Study of a new design of the steel ribs of a saw gin
Authors: Akhmedov Khamidulla , Jamolova Lola , Jumaev Nizomiddin
Published: December 2023

The article presents a study of a new design of steel ribs of a saw gin. When assembling the rib grate from the ribs selected after rejection, the technological gaps in the working area fluctuate over a wide range. As a result, saw blades exert additional lateral pressure on the ribs, which leads to fiber damage and intense wear of the ribs. In the beam under consideration, bending movements play the main role. Displecements due to tension and shear are small compared to bending movements, as are the tension and shear energies compared to bending energy. Therefore, from the six Mohr integrals, one is taken for bending. For steel St.3 Е=2·1011 N/m2, I=6·10-10m4, l=0.084 m, P=40 N we have: θmax= – 0.00151 rad = – 5.21’; ymax= – 0.000088 m = – 0.0088 m. In general, the new design of the cantilever rib from St.3 has the maximum values of deflection θmax= –5.21’ and angle of rotation ymax = – 0.0088 m; the strength condition for normal πmax = 1.462 MPa >[σ]=110 MPa and shear πmax=0.6 МPа <[π]=50 MPa stresses under bending is fulfilled, moreover, with a large margin.
Three-layer reinforced concrete structures with efficient amplifiers
Authors: Akramov Khusnitdin
Published: December 2023

The construction industry is one of the most significant contributors to global carbon emissions, and the production of concrete plays a critical role in this regard. The environmental impact of the construction industry has led researchers to explore sustainable alternatives to traditional construction materials. One such alternative is the use of waste materials, such as marble waste, in the production of concrete. Marble waste, a byproduct of the marble industry, is generated during the extraction, processing, and polishing of marble. This waste material can be used to produce a fine-grained concrete that has improved mechanical properties over traditional concrete.
Improving methods for assessing the effectiveness of tourism infrastructure development
Authors: Arabov Nurali , Belotserkovskaya Nataliya , Nasimov Dilmurod , Utemuratova Gulnarakhan , Abduraimov Dilshod , Makhmudova Mokhinur
Published: December 2023

The article identifies indicators for the development of tourism infrastructure and assessment of the potential of tourist and recreational resources, the organizational and economic mechanism of the regional tourist and recreational system in the country and the cost of individual resources and their combinations and factors.
A digital sustainability approach for effective knowledge and information management in education specific non-profit organizations: Culture Intelligent IS Solutions
Authors: Eshbayev Oybek , Mirzaliev Sanjar , Sultonov Mansur , Igamberdiev Askar , Kholikova Nargiza , Razikov Nuriddin , Hashimov Bakhrom , Aziz Ahmed
Published: December 2023

Information and knowledge management plays a crucial role in the sustainable development of educational organizations with significant impacts on academic communities ‘behavioral patterns. Leveraging digital technologies into academic processes have been considered as a promising way for effective management of information and knowledge. However, superficial or ungrounded adoption of information systems without consideration of the academic and information culture of a given organization may result in ineffective or useless operations that will subsequently burden staff with irrelevant actions. In this regard, this paper aims to provide an approach for sustainable growth of educational organizations with culturally savvy Information System solutions in information and knowledge management challenges. By this approach, enhanced value systems and a better cycle of information\knowledge among the academic community are intended to be achieved. Stakeholder analysis, objective sampling, and literature review were applied for data collection procedures, which provided ultimate identification of information and academic culture patterns and factors on information and knowledge management. By these patterns and factors, we found effective Information System (IS) solutions that match well with generic features of academic and information cultures in Uzbekistan such as data-driven systems, decision support systems, and discourse analysis. Finally, we have drawn implications for educational institutions to manage information effectively and develop a healthy organizational information environment. Additionally, future research directions will be identified in the digital sustainability domain of effective information and knowledge environment.
Self-Learning: Application of differential equations of hyperbolic type to some engineering problems using information and communication technologies
Authors: Isanov R.Sh. , Karimov A.M. , Gafurov M.U. , Nuriddinnov F.R. , Mansurova M.Yu.
Published: December 2023

This article analyzes the issue of organizing students' self-study, which is one of the urgent problems of the credit-modular system. The student independently discusses in detail what to pay attention to in order to solve an engineering problem using information and communication technologies using differential equations with special derivatives of hyperbolic type. It is stated that the initial-boundary value problem of the process is solved by the Fourier method. The construction of a decision graph using the Maple system is explained. The student's attention is focused on the analysis of the results based on the nature of the considered engineering problem.
Pressure as the device for changing electric parameters of Schottky diodes based on Si mono crystal
Authors: Nasirov T.Z. , Turayev A.R. , Muydinova M.A. , Mamatova G.J.
Published: December 2023

The analysis of investigations carried out on studying influence of all-around pressure to Schottky diodes based on n-Si construction characteristics has been presented. It has been revealed that before the pressure influence the diodes capacitance is growing monotonically on the increasing temperature, at the same time after depressurization it loses monotony and has the maximal value about 50 pF on 30 oC temperature. It has been shown that the diodes conductivity is growing slowly on temperature both under the pressure and after its removal. When the pressure up to 12 kBar is acting to n-Si diodes structures then we deal with monotonic growing the resistivity. Further, when pressure is growing in range of 12 and 60 kBar then changes in n-Si samples resistivity on influence pressure has not monotonic character with a maximum value by P ≥ 35 kBar.
Memory computing based on thermal memory elements
Authors: Volodina O.V. , Skvortsov A.A. , Nikolaev V.K.
Published: December 2023

The article analyses the possibility of using elements of thermal memory to create a system that allows to perform calculations in memory. Such a computing system is built on devices that are used simultaneously for storing input data, performing a logical operation, and storing the output result. The authors conclude that it is possible to emulate this behaviour by using thermal memory elements with dielectric (SiO2) by a layer of thermal insulation. Special attention is paid to the logic gates of computing systems and their realisation on the basis of thermal memory elements. Simulation modelling of the work of such elements is carried out on the ANSYS Workbanch platform using the Transient Thermal module for non-stationary thermal calculations. On the basis of the modelling, the possibility of creating two basic logic gates “AND” and “OR” is established. The results can be used to create more integrated structures, such as artificial neural networks.
Effective energy management tools: inventory management and monitoring of energy consumption by personnel
Authors: Tynchenko V.S. , Stashkevich A. , Muzyka P. , Leontieva A.A. , Degtyareva K.V.
Published: December 2023

This article introduces an innovative management system for retail businesses, based on modern computer vision and data analytics technologies. The primary focus is on effective energy management: optimizing inventory control and monitoring employee energy consumption. The system is designed to address several key challenges faced by stores and trading companies. It provides a comprehensive solution for employee monitoring, utilizing computer vision for automated attendance tracking and establishing a detailed absence database. This streamlines supervisory responsibilities and ensures fair payroll distribution, eliminating unjustified payouts for absenteeism. Furthermore, the system revolutionizes inventory management by offering accurate sales statistics through automated data entry and in-depth analytics. It identifies popular items and forecasts future needs, optimizing procurement decisions and preventing losses due to stock shortages.
Numerical study of local heat transfer in tube bundle in pulsating flow
Authors: Haibullina Aigul , Hayrullin Aidar
Published: December 2023

Forced pulsating flows enhance the heat transfer of various heat exchange equipment; however, such flows remain poorly understood. A numerical simulation was used to study how the position of a cylinder in a tube bundle affects the heat transfer during pulsating flow. The tubes of the tube bundle were arranged in an in-line order with the same relative pitch of 1.4. The Reynolds number and Prandtl number had constant values of 1500 and 4.03, respectively. The pulsating flow exhibits a reciprocating asymmetrical character. The pulsation amplitude related to the cylinder diameter was in the range from 0.1 to 0.4, and the pulsation frequency was in the range from 0.2 to 0.8 Hz. The numerical simulation results indicated that the heat transfer of the cylinder in the tube bundle was affected by the row number. With pulsating flow, the heat transfer of the cylinder in the first row had a minimum value, whereas the maximum heat transfer was observed in the last row. The effect of the position of the cylinder along the flow in the tube bundle decreases with increasing pulsation intensity. The maximum heat transfer enhancement of 51% was observed in the first row at a frequency of 0.8 Hz and amplitude of 0.4.
Development of preliminary design of the energy system of the Ningdong, Ningxia thermal power plant
Authors: Yang Zhenyu , Zhang Liyuan , Gao Zhou
Published: December 2023

The purpose of this design is to master the basic steps, calculation methods, and equipment selection methods of the thermal power system of the thermal power plant, and to familiarize with the composition, connection, and operation characteristics of the thermal power system through the preliminary design of 600MW thermal power plant thermal power plant. This paper is divided into five parts, selecting the principle thermal system formulation, calculating the principle thermal system, the selection of unit auxiliary equipment, steam pipeline calculation, and selection after and after successful calibration. The preliminary design of the thermal system is completed by drawing the comprehensive thermal system diagram and the local system diagram using the above calculation data.
Thermoelectric properties of silicon oxide
Authors: Olimov Lutfiddin , Khojimatov Islombek
Published: December 2023

The article describes the results obtained from the study of the thermal conductivity of granulated silicon particles covered with a layer of silicon oxide. The results of the study show that the thermal conductivity of granulated silicon increases from λ ~1,12 W/mK to λ ~2,74 W/mK at T~300÷600 K, which is consistent with the results of silicon oxide (λSiO2~1 W/mK). It was also observed that the electrical conductivity changes in the range of σ~0,0038÷0,017 (Ohm·sm)-1. The results of the study were explained based on the formation of a layer of silicon oxide on the surface of granulated silicon particles obtained by powder technology. Temperature-induced thermal voltaic effects are observed in the silicon oxide layer. This process depends on the formation of electron-hole pairs in cases with localized access, which leads to an increase in parameters λ and σ.
Determination of the optimal heat exchanger configuration for wastewater heat recovery
Authors: Soloveva Olga , Solovev Sergei , Kunitsky Vyacheslav , Lukin Sergei , Sinitsyn Anton
Published: December 2023

The work aims to increase the efficiency of the hot water supply system based on local recovery of the heat of wastewater generated in the shower room for preheating cold water. The work uses mathematical modeling of the thermal operation of the heat exchanger under study. Physical modeling of the heat exchange process between media flows in a heat exchanger was carried out (experimental test). Temperatures of media flows were measured. The temperature distribution inside media flows was compared experimentally with data obtained analytically. In conclusion, an analysis and generalization of the results obtained is made. The result of the research was a designed recovery heat exchanger. Data were obtained on the thermal inertia of the device, i.e., about the required time for the device to achieve a stationary thermal regime from the moment it is turned on. Data were obtained on the potential energy effect from introducing a recovery heat exchanger, taking into account its thermal inertia. The number of showers required to pay off the heat exchanger was calculated. Data were obtained on the influence of changes in the geometric and operating parameters of the heat exchanger on the efficiency of wastewater thermal energy utilization. A methodology for designing a heat exchanger for specific operating conditions was developed. The developed method for designing a recovery heat exchanger allows one to determine the optimal configuration of the device under particular operating conditions and mode of use of the heat exchanger, taking into account its thermal inertia. It is planned to continue the work by assessing the energy and economic effect of using local wastewater heat recovery within the heat supply system of a separate settlement/region.
Bio-materials for sustainable textile-based sensing applications
Authors: Tyurin Igor , Tashpulatov Salikh , Leonova Irina , Kuzmin Arthur , Andreeva Elena
Published: December 2023

The paper is devoted to the production of biodegradable nonwovens (films) based on bacterial cellulose, the study of its physical and mechanical properties and the possibility of designing garments made from this fabric. As a result of the research, samples of bacterial cellulose films of different thicknesses were obtained, the relationship between changes in film thickness and cultivation time was established, the structure of biodegradable films was determined, the values of microfibrils forming them were revealed, and the physical and mechanical properties of bacterial cellulose were studied. A comparative analysis of the obtained biomaterials with commercial samples of composite eco-materials was carried out using synthetic leather made from Mexican cactus waste. The data collected is valuable for further research in the design of eco-friendly and biodegradable materials for both casual wear and textiles, as well as smart biomaterials for the engineering of sustainable textile-based sensors.
Features of mechanical processing of aluminum alloys
Authors: Nikiforov Igor
Published: December 2023

The issue of ensuring the technological quality of aluminum alloy products is considered. The problems that arise during the processing of aluminum alloys are described in detail. The results of various studies aimed at solving the described problem are presented. The author proposes to consider the method of magnetic abrasive machining as one of the promising methods for processing complex products.
Mechanoactivated TiNbZrSi powder for strong and wear-resistant biomedical coatings
Authors: Okulov Artem , Novikov Sergey , Iusupova Olga , Davydov Denis , Liu Kun
Published: December 2023

The paper presents a study of morphology and chemical composition of the TiNbZrSi powder customized by mechanoactivation in an experimental high-energy vibration ball mill equipped with steel mortars and balls of different diameters. The initially synthesized as-cast TiNbZrSi tablet was preliminarily ground into a powder with fraction of about 400 µm using a conventional bench hammer. After that, the above powder was subjected to mechanoactivation within 4 hours in an Ar atmosphere at room temperature. In addition, the synthesized TiNbZrSi powder was deposited onto additively manufactured Ti-6Al-4V ELI substrates through their co-mechanoactivation followed by annealing for 1 hour at a temperature of 800 °C to ensure better adhesion. The characterization of the TiNbZrSi powder before and after co-mechanoactivation with the specified substrate was carried out by scanning electron microscopy.
Obtaining granular semiconductor intermetallic compound Zn-Sb and some of its electrical properties
Authors: Olimov Lutfiddin , Akhmadaliev Utkirbek
Published: December 2023

The article discusses the microstructure of the ZnSb intermetallic compound obtained by powder technology and the results of the study of charge transfer processes in it. Also, the article proposes a method of preparing a Zn-Sb intermetallic compound with a stem-shaped polycrystalline structure using powder technology. Semiconductor Zn-Sb polycrystalline structure preparation method is carried out by pressing Zn-Sb particles together, followed by thermal treatment in several stages. It was found that the stages and temperature of heat treatment have a significant effect on its electrophysical properties. Electrical conductivity (σ), charge carrier concentration (n) suddenly decreases with temperature increase at the initial stage of heat treatment. Such a process is not observed in the subsequent stages of heat treatment. At all stages of heat treatment, the mobility of charge carriers (μ) decreases. In this case, the residence time of charge carriers in the crystal lattice is π~1,52÷1,1·10-12 sec. was determined to change between The results of the study were explained on the basis of the influence of intergranular boundary areas on charge transfer processes. Studies show that at T=300÷700 K, the potential barrier height (φ) in the intergranular boundary areas increases linearly with temperature. For example, φ~0,436 eV at the initial stages of thermal treatment at T=300 K, and φ~0,469 eV at later stages, and at T=700 K, it increases to φ~0,92 eV in all cases. It was shown that it depends on the amount of charges trapped in the localized traps in the intergranular boundary regions.
Nickel (ii) Ion adsorption by native and treated pea pods
Authors: Shaikhieva Karina , Galimova Rumiya , Stepanova Svetlana , Kraysman Natalia
Published: December 2023

The paper describes a study on static Ni2+ ions adsorption by native and treated shells of pea pods (Pisum sativum). Pea pod shells were treated with 1-3% sulfuric acid or sodium hydroxide solutions. Adsorption isotherms were constructed and calculated according to the Langmuir, Freundlich, Tyomkin, and Dubinin-Radushkevich models. It was found that all constructed isotherms were most accurately described by the Freundlich model. It was determined that the highest sorption capacity for Ni2+ ions was shown by 3% sulfuric acid solution-treated pea pods. The paper also describes a study of the kinetics of Ni2+ ion adsorption by native and treated pea pod shells under static conditions. It was determined that the main mechanism of the process is mixed diffusion. The calculated thermodynamic parameters indicate physical adsorption.
Heat distribution in the rod in presence of external non-stationary source
Authors: Chirkunov Yu. A. , Chirkunov M. Yu. , Molodin V.V. , Lapidus A.A. , Topchiy D.V.
Published: December 2023

This paper is devoted to the study of nonlinear heat distribution in a straight homogeneous rod in the presence of an external non-stationary source of heating or cooling in relation to the process of winter concreting of columns. Until now, to describe this nonlinear distribution, as a rule, the classical linear heat equation is used. However, these models do not adequately describe the real process, since the nonlinearity of the process and the presence of an external heat source are not taken into account. Using group analysis methods, we obtained a model that admits the widest group of Lie transformations compared to other basic models of the general model. For the differential equation defining this model, we have obtained all separable solutions and some invariant solutions. The set of these solutions depends on empirically determined parameters: one arbitrary smooth function and ten arbitrary constants. Each solution determines a new exact model for winter concreting of columns. For each solution, at certain values of the parameters on which this solution depends, the temperature distribution in the rod were obtained. The significance of the obtained solutions is as follows: 1) these solutions describe specific physical processes and can be used in practice, 2) these solutions can be used as test solutions in numerical calculations.
Development of a model of the technical condition of the engine according to the data of operational observations
Authors: Absalyamov D.R. , Litvinova N.B. , Tupitsin Yu.E. , Shishkin E.V.
Published: December 2023

The article considers an approach to the use of in-place methods and diagnostic tools in the practice of operating power plants of marine transport vessels, which allow maintenance of engines on demand, depending on their technical condition. It has been determined that under operating conditions it is necessary to know the quantitative values of the wear of the main engine parts and the level of formation of soot and deposits on them without disassembling the engine using indirect diagnostic parameters. For this, a conditional reference model of the actual change in its technical condition has been developed, obtained from the data of operational observations, in the form of quantitative values of wear of parts from their operating time. The model included information about the intensity of carbon deposits in the engine cylinder, which can be used to judge the thickness or amount of carbon deposits formed at a given moment, without disassembling the engine; information about the permissible possibilities and terms of engine operation at the rate of carbon formation established by the model. The raw materials were obtained during the cleaning of the engine cylinders, in which the methods for measuring wear of parts and evaluating carbon deposits were slightly expanded compared to conventional measurement methods. The presence of such a model, which characterizes the change in the technical condition of the engine as it is developed in the form of quantitative characteristics of the wear of its parts and quantitative characteristics of carbon formation, reflecting close to real changes occurring in the engine, makes it possible to expand the information content of in-place diagnostics, increase the controllability of engine reliability; will optimize the timing and frequency of maintenance, more accurately predict the consumption of spare parts and regulate the frequency of maintenance.
Study of specific aspects of calculating the throughput of freight trains on two-track railway sections with mixed traffiс
Authors: Rasulov Marufdjan , Masharipov Masud , Sattorov Samandar , Bozorov Ramazon
Published: December 2023

The article shows a study of the influence of the high-speed train “Afrasiab” on the throughput of stations, which was determined by analyzing the change in the coefficient of displacement of freight trains from the schedule when high-speed trains “Afrasiab” pass to the sections of JSC “Uzbekiston temir yullari”. In addition, the article discusses in detail the issues of reducing the interval of arrival of freight and high-speed passenger trains at the points of division in a row and increasing the maximum number of freight trains that can pass through the section based on the connection technology of high-speed passenger trains.
Two-dimensional-one-dimensional splitting scheme for the numerical solution of problems of transport of multicomponent suspensions using θ coordinates
Authors: Sukhinov Alexander , Sidoryakina Valentina
Published: December 2023

The work considers the spatial-three-dimensional problem of suspension transport, which takes into account many parameters and processes (multicomponent fractional composition of suspension, particle sedimentation rate, suspension distribution, intensity of sources of suspension distribution, etc.). For the basic equation of this problem, a symmetric representation of the convective terms is used, which makes it possible to ensure the unconditional skew symmetry of the convective transport operator. The methodology for constructing additive circuits (splitting circuits) is outlined, which makes it possible to reduce the solution of the original problem to a sequential (or parallel for multiprocessor computers) solution of two-dimensional and one-dimensional analogues. The feasibility of this approach is determined, first of all, by the significant differences in space-time scales for the difference operators of diffusion transfer in the horizontal and vertical directions, as well as their spectra. The constructed splitting scheme is monotonic, and each of the difference equations is non-degenerate if the grid Peclet number is less than one.
Geometric constraints system formation for helicopter construction
Authors: Dergachev A.N. , Klychnikova M.V.
Published: December 2023

The paper presents a methodology of forming a system of geometric constraints in helicopter design. The methodology is based on the synthesis of the requirements in terms of ensuring operation on marine vessels, transportability, and capacity of the cargo (transport) cabin of the helicopter. The universality of this approach allows to adapt the formed system of geometrical constraints to helicopters of different purposes, both to newly developed and modernised helicopters. This methodology allows to define general geometrical characteristics of the helicopter, nomenclature of units requiring simplification of mounting and dismounting procedure of separate units and reduction of their inspection and maintenance periodicity, as well as configuration of helicopter ground and deck service facilities and recommended places of their installation.
Making management decisions on after-sales maintenance processes for aircraft based on the Stage-Gate methodology
Authors: Deniskin Yury , Korchagin Aleksandr , Potsebneva Irina , Busakhin Alexey
Published: December 2023

The article provides a brief description of the methodology for making management decisions for organizing service processes and after-sales maintenance of aircraft based on the Stage-Gate program management methodology and simulation modeling methods. The results of the work show that this approach allows managers to make informed decisions about the possibility of a consistent step-by-step transition through service processes for the effective implementation of an aircraft maintenance program.
Political mission of urban planning: reconciling conflicting development goals
Authors: Moisseev Iouri
Published: December 2023

In the polemic of urban planning discussions, the problems of the incompleteness of the theoretical basis and the unreliability of the proposed guidelines for solving real-world problems have long been discussed. Therefore, without consistent guidelines, planners are forced to rely on intuition and common sense in often contradictory directions of chois. In addition, the picture of development context is much more complicated due to the ever-increasing uncertainty of outlook and the growing momentum of environmental and economic challenges. Today, the task of improving the methodology for predicting changes in human settlements and their impact on local and global ecosystems is particularly acute. Assessing potential short-and long-term social impacts requires the deployment of large-scale studies to quickly present and compare predicted results. This will allow to assess the impact of urban growth on the evolution of ecosystems. Since little attention is paid to macro-regional forecasting issues, there are no proper assessments of the social consequences of planned decisions. In the political discourse of professional societies and institutions, many of these issues are also remain unaddressed.
Efficiency of regulation of investment activity of an ecological orientation at industrial enterprises
Authors: Galachieva Svetlana , Kokov Artur , Sakhansky Yury , Shogenova Fatimat , Gergova Zalina
Published: December 2023

Environmental issues are becoming more and more relevant in the modern world. Industrial enterprises play an important role in environmental pollution, and investment in environmental projects is becoming a key strategy to reduce the negative impact. This research paper examines the effectiveness of environmental investment regulation in industrial enterprises and evaluates its impact on environmental sustainability and economic growth. Modern society is facing the threats of climate change, the depletion of natural resources and the deterioration of the quality of the environment. Industrial enterprises, as one of the largest consumers of resources and sources of pollution, have an important role to play in solving these problems. Investments in environmental projects in industrial enterprises can help reduce the ecological footprint and contribute to sustainable development.
Trends in the digitalization impact on the economic security of the region
Authors: Balog Michael , Babkin Alexander
Published: December 2023

This work aims at studying digitalization trends affecting the economic security of the region. The object of the study is a region considered from the perspective of economic security. The subject is digitalization trends that have a multidirectional impact on the economic security of the region. The main digitalization trends affecting the economic security of the region are identified: the development of the digital economy, including digital business models; increasing the importance of intellectual capital and innovation potential; distribution of network forms of interaction among entities; formation of information threats to economic security; development of digital tools for managing the economic security of the region. During the study, the following effects for the economic security of the region were discovered: the emergence of new economic structures and development trends; the formation of threats caused by the development of digital technologies; the emergence of new opportunities and benefits from digitalization; the presence of threats that impede the development of digitalization at the regional level.
Relationship between the categories of “digital” and “commodity” rents
Authors: Shcherbakova L.N. , Evdokimova E.K. , Fedulova E.A. , Rada A.O.
Published: December 2023

The object of research is the relations that develop regarding the raw material rent and the relations regarding the digital rent in this publication. The purpose of the study is to compare the categories of raw material and digital rent in the mining industry. The work was methodologically based on the use of the following methods: analysis and synthesis, deduction and induction, and the system approach. It was revealed that mining enterprises in the context of the digital revolution become the owners of two types of rents: raw materials and digital, which means the complication of budgetary relations with the state. To determine the nature of these relations, the need to compare the foundations, nature, and forms of manifestation of raw material and digital rents was shown. Conclusions were drawn in the work. It is determined that the cause of raw material rent is the right of ownership of land, and digital rent is the network effect, that is, the specifics of technology. It is emphasized that there are three subjects in classical rent relations: capitalists, while consumers and producers of digital products are present in digital rent relations. It is shown that the relations that develop regarding the raw material rent have a longer character of action compared to the relations regarding the digital rent. It is substantiated that the relations that develop over the raw material rent are formed only in the sphere of the use of natural resources, while the relations regarding the digital rent exist in any part of the digital economy. It is presented that the origin and movement of raw material rent is weakly related to technological progress, while digital rent has grown directly from the digital revolution. It is revealed that the phenomenon of digital rent is based on a special resource – creative
The current state of crypto-market in the USA: regulation and future prospects in the context of the need to develop energy efficiency and achieve the Sustainable Development Goals
Authors: Mosakova Elizaveta A. , Andreev Alexey I. , Zinkina Julia V.
Published: December 2023

The paper traces the evolution of regulation of the crypto market in the United States in the context of the need to increase energy efficiency and achieve the Sustainable Development Goals. We analyze two levels of regulation, including federal regulations and state laws, that are changing to meet new environmental health pressures. There appears to be a lack of consensus at both of these levels, whether due to (significant) interstate differences or disagreements between various federal agencies and departments. We classify US states into four groups based on the nature of their cryptocurrency legislation and describe states that do not fall into this classification. We also explore the properties and features of the digital dollar concept and analyze the prospects for its development in products of the near future.
A qualitative examination of Thai freelancers’ business model enhancement through the integration of social and human capital in the global market
Authors: Sattayathamrongthian Mahachai , Vanpetch Yingsak
Published: December 2023

The research examines how these two forms of capital are interwoven and instrumental in freelancers’ success and provides a comprehensive examination of the strategies employed to optimize and integrate human and social capital, offering a nuanced perspective in the backdrop of a non-Western freelance landscape. A qualitative approach underpins the study, employing in-depth, semi-structured interviews to garner rich, contextual insights. The selection of 42 participants, each boasting at least two years of professional experience, was achieved through purposive sampling. Data collection and analysis were strengthened by an interview guide and a meticulous triangulation of diverse data sources to bolster validity. Ethical integrity, encapsulating confidentiality, informed consent, and participant autonomy were meticulously upheld throughout the research process. The findings underscore the criticality of a balanced blend of technical proficiency, soft skills, and adaptability for freelancers. Thai professionals exemplify an integration of traditional educational values with contemporary online learning platforms, indicating a dynamic approach to skill enhancement. Social capital emerges as equally pivotal, with networks, both online and offline, playing a crucial role. The study reveals a symbiotic relationship between human and social capital, where individual competencies are magnified through expansive and enriched networks. These insights not only chart the trajectory for Thai freelancers but also contribute to the broader narrative of the global freelance economy, accentuating the roles and interplay of human and social capital in freelancers’ success.
Russian institutions of higher education in international rankings: the problem social and environmental sustainability
Authors: Puzatykh Alexander
Published: December 2023

The article analyzes the place of Russian institutions of higher education in the world leading university rankings not only by educational indicators but also taking into account social and environmental impact. For the study two of the most authoritative rankings: Shanghai University ranking and «QS World University Rankings» were selected, as they are recognized by the majority of the global academic community and try to tackle the world’s greatest environmental, social and governance challenges. The appeal to the international research is due to the fact that recently the importance of the compliance of Russian higher education with leading world standards has been admitted not only at the highest level, but also in the professional circles. We have analyzed the results for the last several years, the basic criteria of the international rankings, the place of Russian universities, and identified positions in which Russian universities are inferior to leading universities World University Rankings.