bluuebunny/crossref_metadata_2025 huggingface dataset:
Thermal calculation of a flat plate solar collector
Authors: Kanareykin Alexandr
Published: August 2023

The article is devoted to the thermal calculation of a flat plate solar collector. In this case, the boundary conditions are boundary conditions of the third kind. The solution is found in the transition to an elliptical coordinate system. The author has obtained an analytical solution for the distribution of the temperature field of a collector with an elliptical cross-section at zero ambient temperature with partial adiabatic isolation in the form of a functional series using hypergeometric functions.
Features of using the smoothed instantaneous wave energy history (SIWEH) to analyze the group structure of sea waves
Authors: Zapevalov Alexander
Published: August 2023

The methodological features of determining the characteristics of wave groups of sea surface waves based on the function smoothed instantaneous waves through energy (SIWEH) are analyzed. The analysis is carried out by numerical simulation based on an analytical model of the group structure of waves. It is shown that when the grouping of sea waves is investigated using the SIWEH function, it is advisable to calculate the Groupiness Factors of Height (GFH) in two stages. At the first stage, transform the SIWEH function into a wave envelope, and at the second stage, calculate the GFH using a known envelope. The previously proposed direct calculation of GFH by the SIWEH function leads to significant errors. The effect of the change in the cutoff frequency of the Bartlett filter at a fixed frequency of dominant waves on the calculated values of GFH is investigated. It is shown that when the cutoff frequency changes ±30%, the GFH changes do not exceed 5%.
Decentralized energy: a prerequisite for the distribution of decentralized technology
Authors: Shapsugova Marietta
Published: August 2023

The emergence of decentralized technology has brought about significant advancements in various industries, promising increased transparency, efficiency, and trust in transactions and data exchange. However, for decentralized technology to truly flourish and realize its full potential, it is crucial to establish a foundation of decentralized energy sources. This article explores the critical relationship between decentralized energy and the distribution of decentralized technology. By examining the limitations of centralized energy systems, the benefits of decentralized energy, and the synergies between decentralized energy and technology, we highlight the necessity of decentralized energy as a prerequisite for the widespread adoption of decentralized technology.
Formation of the territorial cost of electricity in the Russian Federation for the economic evaluation of HVAC systems
Authors: Frolova Anastasiya , Prikhodko Vladislav , Zhernosek Maria
Published: August 2023

Comparison of various energy-saving technologies used in the systems of heat and gas supply, ventilation and thermal protection of the building is associated with the mandatory economic justification of the options under consideration (with and without energy-saving measures). According to the economic calculation, the cost of energy resources has the main influence on the profitability of the option. On the territory of the Russian Federation in various areas, for different categories of consumers, their own tariffs are set for the cost of energy resources. This article has collected, systematized and obtained data on the dynamics of changes in the cost of electricity for various tariffs for consumers equated to the population in various regions of the Russian Federation, which in the future simplifies the economic assessment of energy saving measures in DHW systems.
Simplified dynamic model of a nuclear reactor
Authors: Kanareykin Alexandr
Published: August 2023

The article is devoted to the issues of nuclear energy. It considers a simplified dynamic model simulating the main processes occurring in a nuclear power plant. The basis of the proposed model is a model of heat release in the reactor, simulating the relative neutron power and temperature of the coolant in the hot thread of the circulation circuit. The position of the absorbing assemblies, which determines the reactivity introduced by them, is formed in an operational control model that simulates bringing the assemblies into a pre-start state, displacement of the control assembly under the influence of a power regulator, as well as under the action of protections of various levels. The purge/recharge model describes the dynamics of the concentration of boron absorber during water exchange between the deaerator and the circulation circuit. Models of thermal deaeration, pressure compensation and heat exchange in the circuit simulate the pressure and temperature of the coolant.
Aperture-dynamic properties of the sensor information in mobile object management systems
Authors: Osokin Yu.
Published: August 2023

This article discusses the aperture-dynamic properties of sensor devices used in control systems for unmanned devices, in particular, automatic manipulators operating as part of robotic complexes (RTCS). The effects of interference affecting the software control systems of automatic manipulators using high-speed algorithms with interference-resistant coding under operating conditions in production are considered. It is known that in production conditions, there are sources of network interference, interference of an informational nature through communication channels, wired channels, radio engineering channels in a large radio engineering range, from vibration processes, interference and distortion in optoelectronic networks, interference that violates the safe working conditions of radioelectronic equipment. Examples of implemented algorithms based on aperture operators for controlling automatic manipulators with various program cycles, taking into account the peculiarities of production, are given. A comparative analysis was carried out with analogues having similar technological characteristics. control of automatic manipulators operating as part of robotic complexes.
Railways of Uzbekistan in a new era
Authors: Radjabov Ozodbek
Published: August 2023

In the current era of globalization, the life and development of the peoples of the world cannot be imagined without the movement of vehicles. Automobiles, railways and air transports, which are the achievements of modern science and technology, have connected all continents in such a way that no field can be imagined without modern means of transport. It is known from the experience of the leading countries in the world economy that achieving global competitiveness and entering world markets, first of all, consistent economic reform and structural changes are all related to the development of transport infrastructure. This article analyzes the reforms that took place in the railway sector during the years of independence and their results.
The influence of the reliability of wheelsets of innovative wagons in operation on the need for new wheels
Authors: Boronenko Yuri , Gayipov Aziz , Rahimov Rustam , Abdullaev Bakhrom , Galimova Farida , Zafarov Diyor
Published: August 2023

The article considers one of the most important wagon units - wheelsets. An analysis was made of the growing number of uncoupled wagons of Russian railways for unplanned repairs and it was revealed that the most common reasons for this are the faulty condition of the wheelsets and axle boxes. It was determined that the factors influencing the nature of the malfunctions are the inappropriate quality of the repair of bogies, the admission to operation of secondary wheels with a rib thickness of less than 26 mm. One of the measures taken is the lubrication of rails and sleepers. The introduction of innovative wagons with wear-resistant wheelsets may also have an impact on reducing the growth in the number of uncoupled wagons requiring repair. The features of newly produced innovative wagons with a higher axle load and an increased turnaround time are considered. To assess the impact of an increase in the share of innovative wagons on the need for wheels, the reliability indicators of wheelsets of innovative gondola and hopper wagons were considered. Reliability was evaluated by indicators of the probability of nonfailure operation, the failure rate parameter and the time between failures. An assessment was carried out for each type of identified malfunctions. The most common were a thin rib and a shelled tread. Results of the calculations showed the dependences of the number of uncoupled wagons on faults from the run of wagons to uncoupling were defined. The probability of nonfailure operation of the wheels of the studied wagons was determined. It has been determined that the average mileage before a malfunction occurs for innovative gondola wagons is 3.5 times greater than for traditional wagons.
The study of isolation in the collectives of special-purpose railroad cars as an element of the sustainable development of social systems
Authors: Kazakov Maxim
Published: August 2023

The article provides examples of labour social isolations. Multiple professions in which social isolation is present are compared, and differences are revealed both in the process of isolation itself and the influence of other psychogenic factors. The question was raised about the complexity of classifying labour social isolation. The definition of social exclusion is given. Teams that face social isolation were considered. The main differences were identified, both in psychogenic factors and in the isolation itself, of each profession. The fact of the existing social isolation in the collectives of specialized railroad cars was proved by conducting empirical studies in these collectives. The “Results” section presents a table that reflects the main psychogenic factors in the professions considered. Based on the data, a classification of labour social isolation was made. The classification of isolation types was represented by two groups: deprivation social isolation, rather acute isolation; irritable social isolation, less problematic but more common social isolation. The possibility of creating a universal “isolation passport” is discussed. All factors of social isolation of the group can be combined into three components: external factors; organizational and production factors; socio-psychological factors.
Statistical model for determining the quality of cargo work JSC “Uzbekistan Railways”
Authors: Sultanova S. M. , Babakhanova N. U.
Published: August 2023

The object of the study is the joint-stock company “Uzbekistan railways”, engaged in the transportation of goods and passengers. The article uses statistical data that determine the quality of cargo work of “Uzbekistan railways” JSC as primary digital data. Based on the results of the study, a mathematical model of the dynamics of operational indicators is constructed. The article proposes and justifies statistical methods of data processing of the transportation process. The statistical model is based on the most significant indicators of operating expenses of cargo transportation of JSC “Uzbekistan railways”. Significant statistical indicators are cargo turnover; operating fleet of locomotives in freight traffic, locomotive performance; locomotive capacity; local speed; average weight of a freight train; locomotive downtime under loading, unloading; downtime at a technical station; loading volume. The model will significantly improve the quality of management decisions made by the management of the relevant structures.
Model of risk management in railway transport
Authors: Burdyak Pavel
Published: August 2023

The article discusses approaches to risk management models based on modern information approaches. The described approach to the formation of assumptions arises with the provision of ubiquitous operation of railway transport based on the analysis of events that were not previously widely disseminated due to the occurrence of negative consequences. One of the promising methods for predicting risks is a machine study with the formation of a region of probabilistic results. The use of machine research and application is based on its combination of artificial intelligence, mathematical statistics, numerical methods, probability theory, graph theory. A necessary dimension of machine learning is working with a large amount of data, including data that was not previously represented in statistics. A scheme for working with data on all African realities, strategic risk management is described. The result of using models is the creation of technologies that reduce infrastructure investments, reduce the risk of risks when using transport processes, by taking into account the effects and predicting risks. The trend of “fine dynamics” repeats the processes and, as a result, they probably get a positive effect on the transfer process.
A concept of adaptive control system for rail grinding
Authors: Ilinykh Andrey , Pikalov Alexander , Miloradovich Vladimir
Published: August 2023

Rail grinding with the use of rail grinding trains under railway track conditions provides an increase in the rail lifecycle. A main task of rail grinding is to form a rail transverse profile to reduce the contact loading and wear from rolling stock wheels. At present, providing the accuracy of forming a rail repair profile remains a challenge, which overcoming is hampered by the technological features of rail grinding trains. To solve this problem, the paper proposes a concept of adaptive control system for rail grinding process. This system is intended to work as a part of rail grinding train and provide inspection of the results of operations on rail machining and, if required, adjusting grinding modes. The main objectives of this system are: providing accuracy and quality of rail machining by grinding, optimisation of time consumption within a track possession for rail grinding and developing a database to enhance planning of the rail grinding works. Siberian Transport University and JSC “Remputmash” Kaluga Plant are now implementing the introduced concept of adaptive control for grinding in a collaborative project for the development of a new RGT 2.0 rail grinding train.
Dynamic load assessment of building structures
Authors: Rotaru Alena
Published: August 2023

The questions of the theory and practice of testing structures with dynamic loads are presented. A concrete example of testing a structure on its physical model by dynamic load is clearly shown. Some information necessary for statistical processing of research results is given. Building structures are exposed to the intensive dynamic loads. The existing methods and regulatory requirements should consider the loss of strength subject to dynamic impacts. The dynamic load types will show what needs to be more focused on during the construction. Building structures should be designed to stay out of the resonance band during the use. Nowadays, the construction of new industrial complexes and modernization of factories is widely developing. Increased production, leads to increased loads, including load-bearing structures of buildings and structures, namely there are dynamic effects from a large number of machines and mechanisms. Dynamic loads are very varied in nature. They include impacts associated with natural phenomena, such as seismic shocks and wind gusts, as well as dynamic impacts of technological and accidental origin. The most important characteristic determine behavior of buildings and structures under the action of external dynamic load, and are frequency, and nature of vibration. All methods for calculating wind and seismic loads are based on determining these parameters. The purpose of this paper is to demonstrate the effects of dynamic loads on strength, durability, rigidity and crack resistance of building structures; to develop measures for mitigating oscillations; to verify the design performance of commercialized and exploited structures by the frequency and attenuation intensity of natural oscillations. The scientific novelty in this paper is that experiments were conducted to assess the dynamic stability and deficient dynamic stability using the “soil-to-building”.
Estimation of seismic resistance of multi-story buildings in the framework of the bimoment theory using the plate model
Authors: Usarov M.K. , Usarov D.M. , Isaev G.U. , Kurbanbaev M.Sh. , Yuldoshev B.
Published: August 2023

This article is devoted to the development of a continual layered plate model of a multi-story building to dynamically assess the seismic resistance of multi-story buildings in a spatial statement. Seismic vibrations of a building are modeled as a motion of a thick anisotropic cantilevered plate, the deformation of which is described on the basis of the bimoment theory of thick plates.
Specificities of conducting inspections of building structures of cultural heritage objects by non-destructive methods of controlling
Authors: Barabanova T.A. , Nikitenko A.A.
Published: August 2023

In this research, the methods of conducting a survey of building structures of cultural heritage objects by non-destructive testing methods are considered on the example of the building of the newspaper “Izvestia”, located at the address: Moscow, Pushkinskaya pl., 5. The main problems that an engineer faces when conducting these are highlighted. The causes of these problems have been identified. The influence of the disclosed problems on the entire process of surveys and commissioning of the building is noted. The ways of solving some of them proposed.
Actual work’s numerical analysis for support joint of vertical cylindrical tank
Authors: Romensky Denis
Published: August 2023

The article describes the actual work’s numerical analysis for unit joining walls to the bottom of vertical cylindrical tank of 50 thousand m3. Having analyzed the relevant stress-strain state of unit joining walls to the bottom vertical cylindrical tanks for different types of finite element model. Research carried out for the tank with a wall on a rigid base. Features of the unit joining walls to the bottom should include the effect of various loads: static, dynamic, cyclic, corresponding to normal operation. The load on the pressure of the liquid taken appropriate normal operation. Presented and analyzed the main results of numerical studies and get a picture of the stress-strain state of unit joining walls to the bottom vertical cylindrical tank of 50 thousand m3 for different types of finite element model.
Formation of sustainable improvement of buildings in arid zones of Karakalpakstan
Authors: Mansurov Yashnar , Khayrova T.
Published: August 2023

The article is devoted to the study of ways to achieve sustainable development of landscaping and microclimate in the architecture of multi-storey residential complexes in arid zones on the example of the city of Nukus. Their town-planning, space-planning and functional solutions are considered.
Organizational and technological solutions using information modeling technologies in the implementation of construction projects
Authors: Zilberova Inna , Al-Fatla Tareq , Novoselova Irina , Petrov Konstantin
Published: August 2023

An effective management system in the implementation of construction projects has particular significance. The transition to a digital economy determines the efforts of introducing innovations in the field of transforming activities of organizations in the construction industry, which allow the implementation of investment and construction projects while ensuring the established deadlines, costs and quality, as well as minimizing possible risks. In order to reduce uncertainty and improve the efficiency of the implementation of construction projects at the present stage, it is important for construction companies to use modern information technologies in production, including information modeling technologies.
Algorithms for making custom solutions in the digital economy
Authors: Chernov Vladimir
Published: August 2023

The purpose of the article is to find ways to solve the problem of making custom solutions in conditions of uncertainty, risk, poorly structured processes for the development of new product designs with characteristics that meet the rapidly changing needs of the business environment. The solution uses the method of prioritization with expert assessments. The author identifies the existing shortcomings of the methods of prioritization and suggests changes and additions that eliminate the shortcomings in relation to the problem being solved. The developed model, when used in management decision-making, allows us to identify the best functions of the product for their inclusion in the design of an innovative model, to make a rating of the significance of functional properties for the consumer and the manufacturer, which contributes to maximizing demand and competitiveness of the created model, operational innovative changes in the properties of the product corresponding to the rapidly changing demands of the competitive business environment. The article is intended for business leaders, researchers, university students.
“Green” finance as a factor in improving the use of labor potential in rural areas
Authors: Nurzhanova Gulmira , Zubirash Smagulova , Dzholdosheva Tamara , Abykeeva Meerim , Kurmanalina Anar , Bissenbayev Bagdad , Niyazbekova Akmaral
Published: August 2023

The article considers ?green? financing as a factor of increasing the efficiency of the labor potential of rural areas, taking into account the coverage of organic agriculture in the conditions of interesting, several global crises: food, climate, financial. The author considers the organic direction of food production and connects it with the labor potential of the village. A brief overview of Program – the concept of “green finance” in Kazakhstan is made. The level of financing of agricultural enterprises located in rural areas is analyzed, the types of financing for rural areas of entrepreneurial activity are also shown. “Green” financing can be widely used in science, public life, the political system, agriculture and other spheres of society. Orientation to the “green” economy means updating the dynamics of agricultural enterprises, combining science and rural entrepreneurs. Green economy technology in agriculture is expected to become a priority for both public and private companies.
Digital labor market – transformation features, advantages and challenges
Authors: Otakuzieva Surayyo
Published: August 2023

The purpose of the article is to study the features and functions of the digital labor market. Achieving the objectives is associated with the solution of the following issues: substantiate the segmentation of the global labor market into digital and traditional; analyze the segments; research the transformation of the labor process; identify the benefits and risks of digital (virtual) employment. The object of the study is the global labor market, and the subject is its special segment - the digital labor market.
Textile waste in the context of the circular economy
Authors: Radev Radoslav , Marinova Velichka
Published: August 2023

The concept of a circular economy is built in opposition to the traditional linear model where raw materials are used, things are created from them, they are consumed and the leftovers are thrown away. This model relies on large quantities of cheap and accessible materials and energy sources. The textile sector is part of the economies meeting the requirements of the circular economy. What is the real place and importance of waste from textile production and their role for the circular economy, determine the relevance and arouse the interest of the authors in the research. The objective of this paper is to provide a comprehensive overview of the existing situation and to study the textile waste in the context of the circular economy. For the goal fulfillment we use the descriptive-analytical method - theoretical aspects of the studied scientific field are investigated on the basis of current literature research. The information collected is summarized and analyzed; systematic approach; analytical approach; study of the works of authors in the field; comparative analysis; method of observation; determination of relative shares. Current scientific research and economic aspects about textile waste in the context of the circular economy have been explored. The various author collectives work in the field of textile waste, its management and its connection with the circular economy. Research in the field of textiles shows the great importance and fundamental role of textile waste for the realization of the circular economy concept.
Hypothesis of the dimensional-geometric scheme of the Nabta-Playa megalith landscape monument
Authors: Shatalov Alexander
Published: August 2023

The study aimed at identifying a scheme of dimensional and geometric relation-ships that could applied to a famous megalithic monument called “calendar circle”, located in the archaeological area of Nabta Playa. In the revealed sizes, there are repetitions of some prime numbers. A special role in all these cases belongs to the prime number 37, which may be is connected with the sequence of numbers of the “Dome Algorithm” (1, 2, 3, 5, 7, 9, 13, 17, 21, 29, 37, ...) , identified by the author earlier and having a cosmographic sense. Similar dimensional and geometric regularities repeatedly revealed by the author earlier. In particular, one can note in this sense the famous megalith Ales Stenar in Sweden and the Sun Boat of Pharaoh Cheops. The results obtained in this article allow us to state that the creators of “small calendar circle” of Nabta Playa were familiar with both the methods of exact geometric constructions and the ancient Egyptian linear measures system.
Root harvester machine: a review of papers from the Scopus database published in English for the period of 1982-2022
Authors: Xaliqulov Muzaffar , Kannazarova Zulfiya , Norchayev Davron , Juliev Mukhiddin , Turkmenov Xasan , Shermuxamedov Xurshid , Ibragimova Gulzoda , Abduraxmonova Shohida
Published: August 2023

Agricultural products, including root fruits, make up a large part of a person’s vital needs. Therefore, cultivating root fruits and harvesting crops without harm is one of the main tasks of agricultural events. Considering the above, it is of great importance to have information about the scientific research and scientific results achieved by our scientists in this field. To this aim, a bibliometric analysis of articles on root harvesters published in the Scopus database between 1982 and 2022 was used to understand the current state of studying cultivating agricultural products, including root fruits, and harvesting their crops and to provide references for future studies. To carry out this research different tools such as Office Excel 2021, VOS Viewer and Mapchart.net were used. The literature retrieved totaled 201 articles, of which 70% were research papers. During the last four decades, the quantity of published papers has increased significantly. For example, there were 22 papers published in 2019, 22 times increase over the number of papers published in 2002 (1 paper). It was found that the top five countries that published the most literature were China, the United States, India, the United Kingdom, and Canada, which published 44, 43, 12, 12, and 10 articles, respectively. During the chosen period 159 authors from 58 countries contributed to the given field.
Mechanical processing of complex profile aluminum products
Authors: Nikiforov Igor
Published: August 2023

The operability of the mechanism or machine design may be impaired due to premature destruction of products of this design. The article considers a method of machining products of a complex profile made of aluminum. The results of theoretical studies and experimental studies are presented. The problems of machining aluminum surfaces were identified. The author has proposed a method of machining aluminum products with a complex profile.
Analysis of dynamic processes in the impact system of drilling machines
Authors: Dvornikov Leonid , Levacheva Darya , Ischenko Denis , Makarov Aleksey
Published: August 2023

Modern drilling machines designed for the destruction of rocks have a diverse structure, various performance characteristics and in most cases a well-defined limited scope of application. The most common for the destruction of rocks of high strength are impact drilling machines. One of the most effective ways to increase the productivity of such machines is to find rational geometric parameters of colliding elements. The article proposes and substantiates a methodology for studying shock systems based on the application of the shock wave theory. According to the calculation results, the parameters and design solutions of the elements of drilling machines are given, the use of which will allow to increase productivity and reduce energy consumption for the destruction of rock.
Influence of the concentration of suspended substances on the permeability of porous reservoirs at mechanical colmatation
Authors: Rabbimov K.T. , Akhmedova N.M.
Published: August 2023

The article discusses the effect of the concentration of suspended solids on the permeability of porous reservoirs during mechanical colmatation in the areas of underground leaching and the development of methods for preventing mechanical colmatation of reservoirs, mainly due to the introduction of suspended solids contained in injected solutions into productive horizons. The degree of clogging of porous reservoirs was determined, which was assessed not only by changing the rock filtration rate when filtering liquid containing suspended solids, but also by changing the particle size distribution of the filter media in the columns.
Peculiarities of formation of fits of preferential application in the system of hole and shaft
Authors: Leonov Oleg , Shkaruba Nina , Temasova Galina , Vergazova Yulia
Published: August 2023

The article deals with the issues of the influence of accuracy parameters on the reliability and durability of assembly units of machine units. The accuracy of the connection is determined by the type of fit, formed gaps and tightness. Compliance with accuracy standards significantly reduces the level of external losses from marriage. However, a variety of deviations and tolerances of the elements of parts can lead to a wide range of fits, which is not economically viable. Insufficient accuracy can lead to damage to parts, leakage of liquids and gases, as well as to a decrease in the performance of the machine as a whole. Therefore, machine manufacturers are striving to improve the accuracy of the connection of parts and the use of more precise production methods. Seating systems simplify the manufacturing process and reduce the number of metal cutting tools needed.
Pressure losses in apparatuses with swirling flows
Authors: Mukhiddinov D. , Badalov A. , Badalova D. , Haidarov I. , Makhamadjanov M. I.
Published: August 2023

We consider the method of calculating the pressure in apparatuses with swirling flows, depending on the different materials. The influence on the calculation of pressure losses in the two-phase swirling flows of various parameters for the organization of fuel combustion processes, mass and heat transfer, dust collection. Dependence of pressure drop on the amount of energy consumed and the choice of blowers for apparatuses with swirling flows. The causes of pressure drops in two-phase swirling flows are given and listed. The loss of gas kinetic energy in apparatuses with twisted and counter twisted flows of gas suspensions exceeds losses from all other causes, that only this loss should be taken into account. The peculiarities of design and pressure losses in vortex pressureless apparatuses are considered. The results of investigating the dependence of pressure losses in the apparatus on the air flow rate through the vortex chamber and the results of investigating the effect of the ratio of flow rates through the apparatus channels are presented.
The influence of activated binders (cement) on the process of their hardening
Authors: Yudina Antonina
Published: August 2023

Introduction. The paper studies hardening activation with regard to binding systems (cements) and justifies the possibility of its implementation in construction engineering to prepare construction mixes when erecting buildings and structures out of cast-in-situ concrete and reinforced concrete. During hardening of binding systems (cements), hydrated cement phases are formed and the substance becomes solid, affecting the formation of cement stone and its strength. Purpose of the study. We aimed to study the mechanism of phenomena that occur during activation and hardening in binding systems as well as explore the possibility of their implementation and boosting in order to improve the physical and mechanical, processing, and performance properties of construction mixes. Methods. The properties and stability of binding (cement) systems, which are lyophilic systems, qualitatively characterize the interaction between a solid body and a fluid. The lyophilic behavior implies good wetting, low interfacial tension, and resistance of the surfaces to mutual adhesion. Results. A holistic approach to studying the mechanism of hardening activation in binding systems at the level of colloidal chemical phenomena as well as the energy of interaction between the binder and water in construction mix preparation will make it possible to determine the main directions of boosting the processes in binding systems through various types of energy impacts: mechanical, chemical, non-reagent, ultrasonic, electrostatic, and other methods.
Mechanism of abrasion reduction in polydisperse system with carbon nanoparticles
Authors: Skobeleva N.S. , Parfenov A.S. , Kopyshev I.Yu. , Volkov A.V. , Berezina E.V.
Published: August 2023

The research is focused on the problem of abrasive wear. The authors proposed a model based on the adsorption theory, where abrasive particles are used as transport of nanoscale additive for lubricant. Laboratory tests have been performed to determine tribotechnical, physico-chemical and rheological properties of polydisperse suspensions. It was determined that the suspensions consisting of lubricant and carbon nanotubes have high stability when pretreated by ultrasound. Rheological tests performed by rotational viscometry indicated that the insertion of carbon nanotubes slightly increases the kinematic viscosity of the lubricants. Modification of liquid lubricants with multi-walled carbon nanotubes results in wear reduction of friction surfaces by up to 10%. The combined use of an abrasive contaminant increases the efficiency of the additive by up to 35%. Carbon nanotubes provide a shielding effect and reduce the cutting effect of abrasive particles. The analysis of temperature dependences obtained in the tribological experiments allowed us to conclude that modification of lubricants with carbon nanotubes can increase thermal conductivity of compositions, which contributes to effective heat transfer from the friction zone.
Steel-smelting slags of Kuzbass in production of clinker-free fine-grained slag concrete
Authors: Korneyeva E.V.
Published: August 2023

Article presents the results of experimental studies of fine-grained slag concrete based on mechanically activated steel slag of West Siberian Metallurgical Plant (Novokuznetsk). The purpose of research was to develop scientific principles for obtaining clinker-free fine-grained concrete based on activated steelmaking waste resources. For slag crushing for the purpose of binding properties initiation commercial equipment have been selected; coal industry waste of the Abashevskaya mine (Novokuznetsk) was used as activators, i.e. the pit dump burnt rocks, and sludge, obtained by neutralization of used acid batteries, batteries for industrial vehicles with lime electrolytes. Disposal of steelmaking waste remains a challenging issue and possibility of using this type of waste in production of clinker-free fine-grained concrete for industrial and civil construction will create an industrial resources base for the construction industry to improve ecological situation in the region. Change in structure of steelmaking resources using mechanical chemistry has increased its structural instability and activity and has enabled obtaining waterproof clinker-free fine-grained slag concrete of matrix structure (softening factor 0,84 – 0,95) and B7 strength class. The developed slag concrete has been tested at construction companies in the region.
Results of testing the heaving properties of soils under conditions of seasonal freezing and thawing in the cryolithic zone
Authors: Nikolaeva Gamiliya
Published: August 2023

This paper presents the results of a study of the dependence of deformations and heaving forces of loam and sandy loam during freezing in a closed system. On the basis of experimental data, graphs of the dependence of heaving deformation and thawing sediment are obtained. The data obtained were analyzed, as a result of which some regularities were revealed between the degree of heaving and physical indicators of properties.
Mathematical modeling of moisture infiltration in the soil during drip irrigation of a garden
Authors: Gulomov S. B. , Uktamov L. U.
Published: August 2023

This article presents long-term data of theoretical and field experimental studies using a low-pressure drip irrigation system for the apple variety the “Golden” in the Chirchik-Akhangaran valley for the first time. In the development of irrigation regimes for equipment and technology for drip irrigation of a garden, there is a great importance to determine amount of water infiltration into the soils of the active layer of the irrigated area. As a result of current research work, a mathematical modeling of the process of moisture inflation in the soil during drip irrigation of the garden has been developed.
Principles for positioning a capillary barrier made of injected mortar in the earth bed
Authors: Razuvaev D.A. , Lanis A.L. , Chakhlov M.G. , Nagaev E.I.
Published: August 2023

The paper formulates a condition for transferring an “open” freezing system into a “closed” one and proposes calculation criteria for creating a capillary barrier. The solution to the problem of capillary barrier location in the ground is obtained, which is based on linking the zone of intense moisture transfer to temperature isolines in the freezing massif. Several existing solutions for determining the temperature field diagram in the road structure at the time of maximum freezing have been considered. A general algorithm for solving the problem of capillary barrier location in the earth bed has been compiled. To verify the obtained solutions, a series of laboratory tests were carried out to determine the magnitude of moisture accumulation and frost heave of sandy loam and loam samples with plasticity number from 0.05 to 0.13 with different location of capillary barrier relative to frost zone.
Modernisation of measuring probes for monitoring permanent deformations and temperatures in road structures
Authors: Chirva Dmitry , Solodov Vitaliy , Isaev Evgeniy
Published: August 2023

The work is devoted to research in the field of development and modernisation of universal measuring equipment (measuring probes) to obtain information on the deformation processes of pavement layers and subgrade soil under dynamic loads of moving transport on highways, as well as on specially created testing grounds. The equipment presented allows receiving data in automatic mode day and night and the data is transmitted to a remote server via a wireless channel. Measuring probes are installed during the construction phase of the road structure and, in fact, form a single unit with it, which excludes any impact on the road structure. This upgrade will reduce the time it takes to build a monitoring station and will also increase the reliability of the equipment.
Strategic enterprise management and methodological approaches for the telecommunications industry
Authors: Razumov Mikhail , Shevtsov Aleksei , Bykovskaya Nadezhda
Published: August 2023

Formulation of the Problem. The major problem of any telecommunications company is building and implementing a development strategy. It features adapting strategic analysis tools and implementing strategic management in an IT company. The proposal efficiency is determined by the economic effect of implementing an adaptive development strategy, which allows reducing depreciation costs. Goal. Developing a methodological approach to the concept of strategic management of a telecommunications industry enterprise exemplified by PJSC Megafon, highly efficient when introduced in the workflow, and proposing an action plan for implementing this strategy. Results. The key aspects of developing Russian telecommunications companies, affecting the specifics of their development strategies have been identified, external and internal factors significantly affecting the telecommunication company development efficiency have been identified, and the methodological approach to developing a development strategy has been improved through multiple factor analysis.
Impact of digitalization on the effectiveness of management in the field of agricultural development
Authors: Kostomakhin Mikhail , Kostomakhin Nikolay , Tseiko Mikhail
Published: August 2023

Purpose of research was to analyze the impact of digitalization on the effectiveness of management in the field of agricultural development. The analytic investigation of foreign and domestic management experience in the field of agricultural development was done on the base of own date and references sources. A number of highly promising modern trends in the development of agriculture in the world have been described in the article. In our days, the centralized management model in the development of rural areas and agribusiness still dominates in European countries, with all this the modern general approach of the policy of the EU and other European countries outside this union in regional development consists, first of all, in transferring as much management functions as possible to the regional level. This approach is also characteristic of the Russian model of agricultural development policy. The most important and effective tool of modernization of any of the known control systems in the modern world is their digitalization. Digitalization of management in the agricultural sector at all levels from the state to the subject of small agribusiness is not be an exception. Further digital transformation of management in domestic agriculture represents a higher level of digital integration, which affects the most complex organizational changes in government structures and agribusiness. The results of the implementation of these tasks can dramatically affect the growth of profits in the agricultural business and the competitiveness of products will allow the agricultural industry to reach modern world technological frontiers.
Investment issues of agricultural enterprises in the context the development ESG agenda
Authors: Generalova N.V. , Soboleva G.V. , Kolosova D.M. , Kuzmin K.A.
Published: August 2023

This article examines the need for disclosure of non-financial information in agricultural organizations. The authors use the comparison method to prove the need to disclose information in the social, environmental and corporate governance spheres. The importance of dividing into these areas is explained by the ESG agenda. The authors of the article emphasize that there is a sufficient number of studies confirming the positive impact of disclosure of non-financial information on various companies. It was noted both the impact of non-financial disclosures on the financial performance of companies (such as return on assets and return on equity), and the increase in the investment attractiveness of organizations, resulting in stock prices raise. In most cases, this can be explained by current trends, according to which solving environmental problems is a key task. As a result of the analysis, it was concluded that companies need to follow trends and disclose significant facts not only about the financial component of their activities, but also about the non-financial – how they affect the environment and society.
Topical issues of increasing the role of economic ratings and indices in economic stability
Authors: Jiyanova Nargiza , Tashmatova Rano , Kuilieva Shakhrukh Afsona Sukhrob , Allayarov Sukhrob , Abdurashidova Marina
Published: August 2023

The article explores the role, essence and significance of international ratings and indices, assesses the current situation of the Republic of Uzbekistan in the context of economic reforms, and also explores the main directions for improving the position of the Republic of Uzbekistan in international ratings and indices as a factor in stabilizing and developing the economy and introducing foreign experience in accordance with changing modern conditions. This article discusses ways and methods to improve the position of the Republic of Uzbekistan in the index of economic freedom (IEF). The reforms and results of the measures taken in terms of previous years are presented.
Team building’s social practice in large international projects
Authors: Imeskenova Erzhena , Ivashova Valentina , Gavrilova Oksana , Kalashova Anna , Kizilova Natalia
Published: August 2023

The article presents the results of an analytical review of publications and practical experience of team building in a large-scale international project for the development of agro-ecological education SAGRIS. The purpose of the study is to broadcast the positive experience of organizing teamwork in solving global problems, developing modern principles for the implementation of educational projects covering several large regions of the world. We carried out a comparative analysis of the identification of common goals and specific tasks of national project teams from countries that participated in the implementation of the SAGRIS program. 29 people took part in the team building procedures at the full-time stage of the program and in the subsequent expert survey – scientific and pedagogical staff of 4 Russian agricultural universities. The positive experience of team building in a large international project is formulated, which can be used to develop and implement new organizational and methodological approaches in the development of agro-ecological education at the international level, effectively combining the efforts of representatives of the scientific and pedagogical community of several universities in solving scientific problems of our time.
Investigation of changes in the spectral characteristics of lamps of ultraviolet and infrared radiation: a review
Authors: Scherbakov Alexey , Savenkov Dmitry , Doroshenko Valentina , Osipenko Igor , Gladckih Dmitriy
Published: August 2023

The article describes the parameters of ultraviolet and infrared radiation, as well as their physical impact on organic and inorganic objects. The methods of using radiation, especially in agricultural activities, are characterized. The purpose of the study is to study the patterns of changes in the spectral characteristics of radiation depending on the choice of materials used. The parameters for finding IR radiation are given. Comparative results of radiation power depending on the brand of quartz glass are shown.