bluuebunny/crossref_metadata_2025 huggingface dataset:
Improvement of management mechanism for procurement activities of high-tech enterprises
Authors: Surkova Ekaterina , Skachko Galina
Published: December 2023

The article studies the issues of procurement management in order to improve the efficiency of enterprises, as the procurement sector is one of the main factors of market regulation and support of economic stability of the state. Many Russian organisations (especially large business and state corporations) do not carry out competitive procurement procedures in full and such practice cannot properly increase the economic attractiveness of the organisation. In this connection, the issues of a new understanding of procurement as a strategic process are considered. Two main approaches to procurement activities are discussed - traditional and integrated. It is suggested to regulate procurement procedures by developing relevant documents at the enterprise: regulations, instructions. As an important, significant task in this case, the order of supplier selection is disclosed, allowing in practice to reduce the time of any purchase and, as a consequence, without loss of quality, to ensure uninterrupted supply of the enterprise with all the necessary, that is, to achieve the results set to target values. Thus, we can say that improving the management of procurement activities of enterprises, especially high-tech ones, leads to an increase in their efficiency.
Comprehensive assessment of economic activity for high-tech enterprises
Authors: Surkova Ekaterina , Sporova Ekaterina
Published: December 2023

The objective of this article is the classification ranking of a set of corporations’ subsidiaries based on a comprehensive assessment. Integrated approaches to assessing the efficiency of economic activity of enterprises, as well as the formation of a system of indicators used in the integrated analysis are studied. The review of methods of rating ranking of a set of enterprises is carried out. The result of the study is the constructed matrix of analytical indicators with ranking of the efficiency of economic activity of high-tech enterprises.
Mathematical model of the formation of the portfolio of the innovation structure of the technopark
Authors: Martynova Tatyana , Stupina Alena , Eremeev Dmitriy , Boyko Andrei , Kukartseva Oksana
Published: December 2023

The use of approaches and methods of mathematical analysis to the selection and justification of sources of financing for an innovative project is an important and urgent task. The approach presented in the paper is based on a system of equations that allow determining the optimal capital structure necessary to finance an innovative project. This system of equations, using methods of mathematical analysis, provides the best effect of financial leverage. The use of this methodology in the activities of commercial organizations is a modern practical tool necessary for the effective functioning of the decision support system.
Sustainable financial services as a tool for sustainable economic development
Authors: Bisultanova Aza
Published: December 2023

The author reviewed the essence and role of sustainable financial services, emphasised the main aspects of the introduction of sustainable financial services, and provided a chronology of the introduction of global climate initiatives. Due to the fact that in many countries the level of development of “green” finance is still relatively low and further development requires efforts at the level of governments, financial institutions, investors and the public, the author emphasises the need to focus on promoting the development of a sustainable financial system, which will further contribute to solving environmental problems and achieving sustainable development goals. The author also touched upon the factors that influence the degree of development of “green” finance in different countries of the world and noted that in developed and developing countries there is a striking contrast in the use of “green” financial instruments and it is natural. It is undeniable that “green” financial instruments are a significant help in solving the problem of concentration of financial resources for active implementation of green economy principles. Consequently, governments are taking all measures to stimulate green capital to accelerate the achievement of sustainable development goals.
Approaches to modelling economic system of the northern region
Authors: Grigoryeva Elena , Grigoryev Evgeniy
Published: December 2023

The article presents the results of the review of the applied approaches to modelling regional branch systems. The article justifies the task of modelling the extractive industries as a basic branch of the economy of the northern regions of resource type. Technical prerequisites determine the need for the formation of new approaches to the methodology and algorithm for modelling complex systems. The author’s conceptual map of the production subsystem is presented: mining in the relationship with the blocks (graphs) of the regional system. The requirements to the functionality of dynamic models and the choice of their factors for determining the stability of the components of the regional industry system are highlighted. The developed models will take into account system transformations from structural and technological shifts: cyclicality of industry crises, depletion of reserves, digital maturity, and ESG effects.
Scenarios for the development of regional production and economic systems based on industrial parks
Authors: Brusnikin K.N. , Piskun E.I. , Bondarev N.S.
Published: December 2023

The article presents the results of research on the formation of strategic alternatives for the development of regional production and economic systems in industrial parks within the framework of the internal rating management mechanism. A generalized scheme of cognitive modeling is proposed, which is based on the synthesis of methods of cognitive analysis, principal components, expert analysis, econometric modeling, which makes it possible to increase the validity of the concepts of the cognitive model and scenarios for the development of regional production and economic systems in the system of industrial parks. The presented cognitive model makes it possible to develop scenarios for the implementation of strategic alternatives for the development of regional production and economic systems, evaluate their effectiveness, and choose the most appropriate development strategy for the current situation, ensuring their sustainable functioning in the system of industrial parks. Basic and alternative scenarios have been developed using the example of a regional production and economic system representative of a cluster of companies with crisis development, making it possible to identify the components of the development strategy that require adaptation to ensure the transition of the regional production and economic system representative to a higher cluster. Research data can be used by interested stakeholders: industrial parks, regional production and economic systems, regional authorities.
Formation of strategic alternatives for the development of regional production and economic systems in industrial parks
Authors: Brusnikin K.N. , Piskun E.I. , Bondarev N.S.
Published: December 2023

The article presents the results of research on the formation of strategic alternatives for the development of regional production and economic systems in industrial parks within the framework of the internal rating management mechanism. A generalized scheme of cognitive modeling is proposed, which is based on the synthesis of methods of cognitive analysis, principal components, expert analysis, econometric modeling, which makes it possible to increase the validity of the concepts of the cognitive model and scenarios for the development of regional production and economic systems in the system of industrial parks. The presented cognitive model makes it possible to develop scenarios for the implementation of strategic alternatives for the development of regional production and economic systems, evaluate their effectiveness, and choose the most appropriate development strategy for the current situation, ensuring their sustainable functioning in the system of industrial parks.
Literature review in the field of solidarity economy (SE) and energy cooperatives
Authors: Egorov Vladimir , Inshakov Andrey
Published: December 2023

The article is a review of existing research on the concept of a solidarity economy (SE) and the role of cooperation in this area. The authors analyze various aspects of the SE, such as equity, sustainability, resource allocation, social inclusion and environmental sustainability. The paper emphasizes the relevance of the study of solidarity economy and cooperation in the context of modern challenges. The authors draw attention to the fact that the SE is focused on meeting social needs, unlike the traditional economy, which is focused on profit and cost reduction. The authors point out that the solidarity economy does not require a complete replacement of existing economic forms, but is complementary and compatible with existing market relations. Various methods were used in the research process, including the analysis of scientific literature and international practices, as well as the study of data and statistics. The authors analyze and compare various studies and approaches related to the SE and cooperation. The main conclusions of the article emphasize the importance of a solidarity economy and cooperation in creating a fair, sustainable and socially inclusive society. The authors note that a solidary economy and cooperation can contribute to an equal distribution of resources, promote environmental sustainability and innovative practices. The article provides valuable information for researchers, economists and practitioners interested in solidarity economy and cooperation. The results of the study and the proposed approaches can be used to develop policies and programs aimed at developing a SE and improving socio-economic conditions. The role of energy cooperatives in the sustainable development and decentralization of energy systems is considered.
Social aspects of environmental problems
Authors: Marchenko Galina , Murzina Svetlana
Published: December 2023

The social aspects of environmental problems are no less important for preserving the quality parameters of the environment than numerous energy and technical aspects. In the context of increasing environmental problems and difficulties in the relationship between man and nature, it seems extremely important to appeal to the consciousness and thinking of man and humanity. An effective means of influencing a person’s system of beliefs and values is education. Therefore, the article’s appeal to pedagogical potential as one of the significant means of solving environmental problems seems quite relevant. Education system prepares specialists capable of solving environmental problems associated with industrial production and energy-saving technologies.
Mediating role of human capital in enhancing ESG practices in manufacturing for regional labour market development
Authors: Popova Ekaterina
Published: December 2023

Improvement of human capital opportunities is as a paramount outcome resulting from the implementation of Environmental, Social, and Corporate Governance (ESG) practices. Article aims to examine the pivotal role played by human capital as an intermediary factor explaining the impacts of ESG practices within firms on the regional labour market. Research methodology employs the Partial Least Squares Structural Equation Modelling (PLS SEM) technique. This approach is founded on data collected from a survey of 362 employees affiliated with manufacturing companies situated in the industrially advanced Ural region of Russia. The findings unveiled that ESG practices do not have a significant direct influence on the social and cultural development of the region. Instead, they contribute to the development of human capital, thereby enhancing opportunities on the local labour market. This manifests through the creation of stable employment opportunities, engaging and diverse work environments, and an elevation in career prospects. The implications of these findings extend to the practical realm, offering insights for the formulation and execution of regional human capital management strategies within Russian enterprises. Additionally, these findings can inform the development of ESG practices that wield a positive influence on the local labour market, thereby fostering a more sustainable and prosperous future for the region.
Training of specialists in the field of occupational safety and ecology based on professional standards
Authors: Anamova R.R.
Published: December 2023

The constantly deteriorating global environmental situation, the emergence of new enterprises and the rapid development of new technologies require the development of new approaches to personnel training in the field of technosphere and environmental safety. The current topical issue is the formation of a mechanism for predicting the future needs of enterprises in the implementation of new labour actions within the generalised labour function of employees in the field of ecology and occupational safety. For this purpose, it is necessary to implement the so-called “anticipatory” retraining of personnel in order to ensure the effective implementation and development of new technologies. The article describes one of the approaches to solving the problem of such advanced retraining in the field of labour protection and ecology.
Promoting environmental literacy and behavior change among individuals and communities in digital era
Authors: Israilova Elima , Dudukalov Egor , Goryunova Elena , Shatila Khodor
Published: December 2023

This study explores the endeavour to enhance environmental literacy and foster behavior change within Asia’s diverse and dynamic context. Amidst cultural richness, economic disparities, and urbanization challenges, the quest for sustainable practices takes on unique dimensions. This research delves into the complexities and opportunities of nurturing environmental awareness and driving positive behavior change in the Asian context. Cultural diversity necessitates tailored approaches, aligning behavior change interventions with local norms and values. Socioeconomic disparities demand equitable access to education, resources, and sustainable options, ensuring inclusivity across all segments of society. The rise of consumerism and urbanization necessitates innovative strategies that reshape urban landscapes and challenge convenience-oriented lifestyles. Educational strategies emerge as pivotal, capitalizing on institutions’ roles in disseminating environmental knowledge. Collaboration between educational bodies, governments, and non-governmental organizations is essential to establish a strong foundation of environmental literacy. The influence of traditional wisdom, indigenous practices, and the collective mindset can guide behavior change initiatives, embedding sustainable choices within cultural identities. By embracing the unique characteristics of Asia and recognizing the global implications of behavior change efforts within the region, this study contributes to a deeper understanding of promoting sustainable behaviors that resonate with diverse communities.
Architectural organization of landscaping and landscape design of residential and public buildings
Authors: Kidirbaev Bahram
Published: December 2023

The article discusses the features of the architectural organization of landscaping and landscape design of residential and public buildings, as the urgency of the problem of designing and constructing buildings with the use of means to improve the environment due to the deterioration of the ecological environment in large cities is currently increasing.
Tests of reinforced concrete floor slab with initial crack
Authors: Seliutina Liubov , Ratkova Elena
Published: December 2023

This study presents the results of the examination of precast reinforced concrete floor slab with initial crack of continuous rectangular cross-section with nominal dimensions 6380*3230 mm and a height of 160 mm. The slab was manufactured in the factory during summer. Concrete curing took place in natural conditions without the use of heat and humidity treatment. The slab has an initial crack that appeared before the test, located in the middle of the span in the direction of the channel-former in the layer of concrete with minimum thickness. Information on the testing procedure is presented, the results of calculations and full-scale tests are given. The analysis of the slab deformation dependence diagram on the load value is carried out. The conformity of crack resistance, stiffness and load-carrying capacity of a slab with an initial crack to the normative requirements has been checked, and the theoretical and experimental results have been compared. The influence of the initial crack in the slab on its stiffness and crack resistance has been established.
Stability conditions of plastic deformation of thin-walled plates and shells under complex stress state
Authors: Polilov Alexander , Sklemina Olga
Published: December 2023

Using examples of uniaxial and biaxial tension of thin-walled metal or composite elements, the main hypotheses allowing to estimate the conditions of unstable deformation are explained. Specific estimations are given for a basic equation relating stress and strain tensor intensities as applied to plates, cylindrical and spherical shells. The equipment for testing tubular specimens under proportional loading under various plane stress states is described.
Relationship of production and population in Siberian and Mongolian cities
Authors: Vorobyev Nikolay , Vorobyev Alexander , Ippolitova Nina
Published: December 2023

The purpose of this study is to identify the spatio-temporal relationship between the population and production of the urbanized territories of the Siberian-Mongolian region. Cross-cutting methods - statistical, cartographic, comparative-geographical - are used at all stages of the study. The units of measurement taken are the following: in Russia - urban districts and municipal districts, in Mongolia - the capital city and aimags. The main results consist in identifying the main urbanized areas that have formed in places of maximum population concentration: around the capital city of Ulaanbaatar in Mongolia, and in southeastern Siberia around the regional centers of Irkutsk, Ulan-Ude and Chita. Competitive advantages and opportunities of cities and regions are assessed. The increasing role of the main economic centers objectively leads to the growth of the corresponding agglomerations and damages the functioning of other urban settlements. Based on the analysis of the economic complex of the studied territory, the branches of industrial specialization are distinguished, the typologies of municipalities of the region are carried out according to the prevalence of the main activity in the industry. The determining factors of the social and-economic development of cities are the effects of the economic and geographical location and the accumulated socio-economic potential of the territory in relation to adjacent spaces.
Water demand management in the production of non-autoclaved foam concrete
Authors: Vishtorsky Evgeny , Bogomolov Sergey , Smirnov Aleksandr , Mutalibova Gavakhirat
Published: December 2023

The article deals with the issues of regulation of water consumption of foam concrete mixtures. Theoretical substantiation of the possibility of using various mineral and chemical additives in the production of non-autoclave foam concrete is carried out. An experimental study of the flowability of nonautoclave foam concrete from mixtures of reduced water content is carried out. It is established that in a water-solid ratio equal to 0.38 the additive “Hemix Art-2” in the amount of 1.1 % of cement mass increases the fluidity of foam concrete mixture by 89%. It is obvious that with the use of the additive “Hemix Art-2” reduces the size of the bubbles of the involved air, which gives high plasticity of the foam concrete mixture.
Management and marketing in the sphere of estate cultural heritage restoration and reconstruction in Russia
Authors: Dayneko Dennis , Dayneko Alevtina , Dayneko Victoria
Published: December 2023

The estate cultural heritage objects are becoming increasingly important in shaping the urban environment. There are new requirements for the development of society corresponding to modern economic, environmental, social, and aesthetic attitudes. To solve the problem of preserving estate historical and cultural heritage, it is necessary to develop new approaches that correspond to the current conditions of economic, social, and political transformations happening in the country. The analysis of various conceptual approaches to explaining the ongoing processes with historical real estate in our country allowed the authors to conclude that it is necessary to study the methods and methodology for solving this problem. Methodological provisions and recommendations for the preservation and development of estate cultural heritage objects through the implementation of marketing programs are presented. A set of measures for making effective management decisions that allow preserving and fully realizing the potential of heritage real estate objects is considered. The conclusion is made about the expediency of improving regulatory and legislative support and the development of marketing programs in the sphere of estate cultural heritage restoration and reconstruction. The management of cultural heritage real estate objects based on the principles of public-private partnership is proposed.
Aspects of increasing energy efficiency in modern cities based on the transition to a new technological way of life for residents
Authors: Shvetsov Alexey
Published: December 2023

The study analyzed aspects of increasing energy efficiency in modern cities based on the transition to a new technological structure of residents. One of the energy consumers in modern homes are chargers for various devices; as a rule, the number of such devices in a separate living space is >10. Aspects of increasing energy efficiency in modern cities based on the transition to a new technological structure of residents include the abandonment of more energy-consuming wired chargers and the transition to wireless devices. Data were obtained reflecting indicators of the prospects for the transition to wireless chargers in modern cities. The results of the study may be of interest to charger manufacturing companies and when conducting research in this area. In addition, these studies may be of interest to researchers and design companies conducting work in the development of energy systems for homes of the future.
Study of the laws of internal friction in magnetic fluids with a strongly developed thixotropic nanostructure
Authors: Bolotov Aleksander , Novikova Olga , Novikov Vladislav
Published: December 2023

Due to their unique physical properties, magnetic fluids are promising for use in bearings, seals, sliding guides, and other devices of modern technology. Some restrictions on their use are imposed by the tendency of magnetic fluids to lose colloidal stability and structure formation in strong magnetic fields. Increasing the stability of a colloid by reducing the size of the dispersed particles of the magnetic fluid is limited by the Heisenberg uncertainty relation, on the condition of maintaining their ferromagnetic state. The search for ways to reduce internal friction in technical devices with magnetic fluids having a highly developed thixotropic nanostructure is important from a practical point of view. Using a device, simulating the operation of a magnetohydrostatic bearing, the rheological characteristics of a fluid nanostructured by a magnetic field, which is a colloidal system with a dispersed phase of magnetite particles (10 vol.%) and a dispersion medium of silicon organic fluid PESV-2, were studied. The dynamic viscosity of the magnetic fluid was about 0.05 Pa.s at 20°C. It has been established that the process of structuring a magnetic fluid in an external field can last hundreds of hours and depends mainly on the viscosity of the dispersion medium and the concentration of magnetite. It has been revealed that the motion of a cylinder with a terminal velocity begins only at shear stresses exceeding the limiting static stress and proceeds at a constant velocity. The breakdown of the structure begins after the shear stress exceeds the critical value. The critical stress is introduced to compare the strength of the structure of different fluids. The value of the critical stress was determined with an accuracy of up to 50 Pa by analyzing the curves of the change in the sliding speed with time. It has been established that the temperature dependence of the critical shear stress is very sharp and close to exponential.
BIM dimensions: example of air blower station at wastewater treatment plant
Authors: Bazhenov Victor
Published: December 2023

The main goal of research is to analyse the prospects for the development of BIM dimensions (3D-7D) in Russia on the example of Water and wastewater industry (WWI) asset. Justification of goal is the insufficient development of industry-specific BIM systems, allowing for different interpretations of its dimensions. The object of research is the air blower station (ABS), the most energy-intensive asset, which typically consumes 62-85% of the energy of WWTP’s. The method is a hypothesis of 3D-7D modeling of water utility asset, presented for the discussions. ABS compressors reduce costs by regulating the air supply due to lifestyle of the population and seasonal environmental conditions (example of simulation results is present). 3D design visualises variant of the reconstruction of the ABS, implemented according to typical project. 4D planning represent the schedule of energy service company, which provides investments and jobs for: design documentation execution, equipment purchase, installation and commissioning of equipment. 5D costs analyses features of the phase in terms of project expertise. 6D sustainability model in practice differs from prediction or forecasting generated by the simulation model of ABS asset, power consumption will be lower up to real (not simulated) technological loads. 7D management analyses possibility of the life cycle cost estimation as strategic advantage of WWI standard. The paper is based on Russian standards. Designing of 3D models are developing on an irregular basis (proactively) in Russia. The mastering of modeling 3D, 4D, 5D based on individual disciplines (as autonomous databases) is self-sufficient today as WWI tusk. The operational nature of WWI enterprises testifies to the development of elements of 6D-7D models.
Enhancing the tribological properties of fluoroplastics operating in a hydraulic fluid environment
Authors: Alisin V.V. , Roshchin M.N. , Lukyanov A.I.
Published: December 2023

The issues of an increasing the wear resistance of fluoroplastics under conditions of dry friction against steel and in the environment of hydraulic fluids are discussed in this article. The statement about the prospects of radiation treatment for strengthening fluoroplastics is substantiated. Comparative tribological tests were carried out on a laboratory friction machine according to the friction scheme of the end of a cylindrical sample made of steel 40X13 on a fluoroplastic plate. It has been established that radiation-modified fluoroplastic has increased wear resistance. The antifriction properties of strengthened fluoroplastic during friction in a hydraulic fluid environment are investigated. The influence of load and speed on the friction coefficient is analyzed. Based on the study, a radiation modification of fluoroplastic rod seals of hydraulic cylinders and hydraulic piston machines is proposed, with a possible increase in wear resistance up to 4 times.
Assessing the success of forest crops using UAVs
Authors: Kabonen Alexey , Gryazkin Anatoly , Gavrilova Olga , Budnik Pavel
Published: December 2023

The article presents data on the growth and development of 22-year-old forest crops created by sowing and planting seedlings with a closed root system on the territory of the Republic of Karelia (Russia). Field surveys showed that young forests with a predominance of Pinus sylvestris were formed in all experimental plots. The share of forest plantations on the plots in terms of timber stock amounted to 38 - 44% of the total stock. The UAV data processing method made it possible to build an orthophotomap of the area and calculate the quantitative distribution of tree species: 60% (plots without tillage) -80% (plots with tillage) - Pinus sylvestris, 10% - 22% - betula pendula. These indicators are consistent with the field survey of the area (differences less than 10%). As a result of running the algorithm for automatically searching for trees using point clouds using the lidR package, it was possible to detect about 90% of trees in all areas and determine their heights. At the same time, most of the trees (85%) found by the algorithm were identified correctly. The number of false positives and the number of missing trees were quite low, and the weighted average quality score was 0.89, which indicates a high efficiency of tree search. The heights measured from the UAV data were in good agreement with the heights measured by the ground method.
Measure of compactness for analyse dataset
Authors: Mukhammadiev Ravshan , Mukhamadiev Abdivali
Published: December 2023

The article dedicated to finding measure of compactness, and analyze dataset with using compactness. For finding measure of compactness, we search for hidden regularities from sociology database. In this way we need consider n-p full task and it will be 2n combinations. To solve this task, we use heuristic way with using binary matrix. In the article we use invariant methods which find measure of compactness of dataset. Our survey were taken from korean, uzbek peoples and we obtained a result from this dataset.
Software as a strategic tool for the development and improvement of the efficiency of organizations
Authors: Stupina Alena , Gorodishcheva Anna , Divaeva Anna , Danilchenko Yuri , Voronina Elena
Published: December 2023

The modern market is characterized by a high degree of dynamism and volatility, which complicates the tasks of organizations in achieving a competitive advantage. The article explores the use of software to develop and improve the efficiency of organizations. In a rapidly changing market, business process automation is becoming an integral part of the success of organizations, as it is a tool that allows them to thrive in a highly competitive environment. The article discusses the main view and functionality of the application.
Microelectronic device for determining telecontrol signal pulse quality
Authors: Azizov А.R.
Published: December 2023

The application of electromagnetic relays in control systems on railway transport is very problematic. The solution of this problem is based on modelling processes and application of microelectronic devices. The functional scheme for different modes of operation of the telecontrol signal decryption device is developed and investigated. Graphs and algorithm of microelectronic unit operation are given.
Workflow automation and performance improvement based on PostgreSQL
Authors: Kravtsov Kirill , Tynchenko Vadim , Semenova Evgeniya , Shalaeva Daria , Pinchuk Ivan
Published: December 2023

This article discusses the development of an automated information system for improving and improving the efficiency of the cinema. This is achieved by automating the process of submitting requests, monitoring the quality and quantity of solutions for such requests. The system is designed to provide access to the list of services provided, its timely updating and optimization; the formation of all types of reports; providing managers with a tool that automates most of the routine work on the registration of the results of the cinema.
Wave propagation in a cylindrical body in the presence of surface forces depending on the relative displacement
Authors: Rikhsieva Barno , Khusanov Bakhtiyar
Published: December 2023

Studies of wave propagation in extended bodies with external friction have a wide range of applications and are significant for various engineering and scientific fields. They contribute to the development of new technologies, improve the design and construction of structures, and expand our understanding of the physical processes occurring in various materials and media. In this article, axisymmetric two-dimensional problems of the propagation of longitudinal waves in a cylindrical body are numerically solved in the presence of surface friction forces of the Winkler and Kelvin-Voigt types. For the numerical solution, the Wilkins scheme of the finite difference method was used. The influence of friction forces on the wave parameters is revealed. It is determined that the results of the considered problems are between solutions using slippery contact without friction and with friction according to the Coulomb law. A 5-7% deviation of the hypothesis of flat sections is shown, which makes it possible to reduce such a problem to a one-dimensional formulation.
Multilayer medium behavior simulation in the presence of delamination defects
Authors: Lyapin Alexandr , Glushko Sergey
Published: December 2023

The article is devoted to the study of the steady harmonic oscillation excitation processes by a surface source in a multilayer linearly elastic layered half-plane with an internal defect. The application of the work results is associated with the design and assessment of the multilayer structures state, such as geological structures, non-rigid pavements, layered composites. The study is based on the use of the boundary element method and the construction of boundary equations with respect to displacements at the defect boundary. Using the integral Fourier transform, fundamental solutions for a multilayer half-plane satisfying the stress-free conditions at the upper boundary of the domain are constructed. A feature of the construction is the good computational ability of the proposed algorithm with a large number of layers. The basic one is the construction of a solution for a homogeneous half-plane. This allows you to implement parallel computing. In the numerical implementation, a spline approximation of the defect boundary is used. Linear boundary elements are applied. As an example, a comparative analysis of the amplitude-frequency characteristics on the surface of the half-plane is given for cases of a limited defect, its absence and contact of layers without friction on the entire boundary. This allows us to draw conclusions about the possibility of identifying internal damage at the boundaries of layers by monitoring the wave field on the surface of a multilayer structure.
The place and role of automated systems in mechanical engineering
Authors: Burdo G.B.
Published: December 2023

Introducing off-the-shelf solutions for automated machine-building systems causes some difficulties related to attempts to change the algorithms of process participants, and also to the need to duplicate information transfer chains, as most systems operate autonomously within certain production units. The author proposes a new approach to organizing the interaction of automated systems of machine-building enterprises. Effective implementation of automated systems is possible only based on investigation and optimization of machine-building enterprise activities, and based on analysis and quality assessment of functions performance by participants of different enterprise processes. The method comprises identifying the process for preparing production and output of finished products, and processes of lower levels (auxiliary), but necessary for implementing the main, and functionally related to it. The main functional process defines a time parameter and auxiliary processes accompanying the main process. These auxiliary processes are financial, material, personnel, and organizational support processes. The article contains the basic principles of creating a complex of automated machine-building systems. The article analyzes the role and place of each of the main functional automated systems. The author gives considerations on the sequence of implementation of the project of digitalization of machine-building production.
Influence of orientation of layers of a multilayer composite material on the stressed state of a robotic structure under dynamic loading
Authors: Khayrnasov Kamil
Published: December 2023

The paper developed a method for calculating the stress-strain state of a robotic structure made of composite material under dynamic action. The bearing capacity of multilayer composite materials is affected by the location of the warp threads of the composite material. By changing the orientation of the layers, it is possible to change the bearing capacity of the composite material. In the present work, such a study was carried out for a robotic system made of a composite material under the action of a dynamic operational load. An eight-layer composite material with different layer orientations was considered. Carbon fiber was used as the basis. As a robotic system stand was considered, designed to simulate flight characteristics in laboratory conditions. The simulation of the stand was carried out. The bench was approximated by finite elements. The convergence of the results of the finite element model of the stand was checked by condensing the finite element mesh and comparison the results obtained. Robotic systems are equipped with elements that move the channels: bearings, gear rims, gearboxes, motors. In the present study they were replaced in the finite element model with a system of bar elements of identical stiffness. The design of the stand was a three-layer structure, consisting of external carrier layers of an eight-layer composite material and a filler layer between the carrier layers of lightweight material in the form of foam and used to absorb shear stresses and prevent the bearing layers from approaching. Calculation and analysis of the design of the stand for dynamic load is carried out, the stress-strain state of the stand is obtained for different arrangement of the layers of the composite material.
Justification of the choice of means of controlling the parameters of the crankshaft after processing for the repair size
Authors: Leonov Oleg , Shkaruba Nina , Temasova Gаlina , Vergazova Yulia , Leonov Dmitriy
Published: December 2023

An assessment of the quality of the control of the parameters of the crankshaft after processing for the repair size was carried out. The company's metrological support system must guarantee the accuracy and quality of the crankshaft repair, eliminating the possibility of defects during subsequent assembly. When repairing engines, defects in the crankshafts are detected, after which they are replaced with new ones or processed according to the repair size. After processing the crankshaft for the repair size, it is necessary to carry out control according to six parameters. It was revealed that to measure the diameters of the main and connecting rod necks of the crankshaft of the Zavolzhsky Engine Plant, as well as their ovality, it is necessary to replace the micrometer 50-75 (0.01) used at the enterprise, the maximum measurement error of which is twice as large as permissible, with a lever bracket 50-75 (0.002) to reduce the measurement error and improve the quality of control. To control the greatest beating of the second, third and fourth root necks relative to the first and fifth root necks, the hour-type indicator used at enterprises fully satisfies the specified conditions, the maximum error does not exceed the permissible one. To control the axial clearance of the already assembled crankshaft along the thrust bearing, dial indicator 0-10 (0.01) is also used, which provides the specified measurement accuracy with a three-fold margin. When measuring the length of the third root neck, the use of a caliper calipers 0-125 (0.05) leads to an excess of the permissible measurement error by 3 times, but there are no other more accurate universal measuring instruments to control this parameter, since the control is carried out by special sponges for measuring holes, which are available only for calipers. It is recommended to design a gauge to measure the length of the third root neck.
Influence of wear of friction wedges of model 18-100 trolleys on the lifetime of the comb
Authors: Gayipov Aziz , Galimova Farida , Xurmatov Yahyo , Shokuchkorov Kurbonnazar , Abdirakhmanov Jamshid
Published: December 2023

The issue of the influence of wear of friction wedges on the wear of the flange thickness of wheel pairs of freight cars operating on the railways of the Republic of Uzbekistan is considered. An analysis of freight car uncouplings during current uncoupling repairs is presented based on malfunctions of the thin flange of the wheel pairs and overestimation/underestimation of the friction wedge relative to the supporting surface of the bolster more than normal. Methods of combinatorial and statistical analysis of source data were used. The parameters of freight car bogies that most influence the wear of the flange of wheel pairs have been studied. Ways to reduce wear on the flange of wheel pairs in operation are considered by tightening the regulatory requirements established when releasing bogies from repair based on the condition of the friction wedges. The results obtained indicate a decrease in wear on the flanges of wheel pairs and an increase in the service life of the wheels of bogies of 18-100 freight cars when following the recommendations of the article on the repair of bogies.
Standardisation of 18F using new portable 4πβ(LS) – λ coincidence detection system at ENEA-INMRI
Authors: Abubaker Farmesk , Capogni Marco , Tortorici Francesco , Sutera Concetta , Pepe Francesco , Corbo Matteo , De Felice Pierino , Bellini Vincenzo
Published: December 2023

This project concerned with the development at ENEA-INMRI of new in-situ 4πβ(LS) − λ coincidence detection system for activity measurement of the short half-life radionuclides used in Nuclear Medicine. The hardware of the new portable 4πβ(LS) − λ coincidence detection system was implemented at ENEA-INMRI, in collaboration with Catania University and INFN, by adding a gamma channel on the existing TDCR portable detector available at ENEA-INMRI. A new data analysis software was developed at CAEN, independently from an existing one elaborated at ENEA.INMRI, in order to analyse the data recorded in list-mode by the new detector equipped with the CAEN desktop digitizer DT5720. The activity for short half-life radionuclides used in nuclear medicine can be then computed. Two primary activity measurement TDCR and 4πβ(LS) − λ coincidence methods were then used to determine the activity of 18F at ENEA-INMRI. The TDCR parameter is measured for the 18F standard solution using both CAEN and ENEA-INMRI data analysis software.
Commissioning of miniBELEN-10A, a moderated neutron counter with a flat efficiency for thick-target neutron yields measurements
Authors: Mont-Geli N. , Tarifeño-Saldivia A. , Fraile L.M. , Viñals S. , Perea A. , Pallàs M. , Cortés G. , Garcia G. , Nácher E. , Tain J.L. , Alcayne V. , Alonso-Sañudo O. , Algora A. , Balibrea-Correa J. , Benito J. , Borge M.J.G. , Briz J.A. , Calviño F. , Cano-Ott D. , De Blas A. , Domingo-Pardo C. , Fernández B. , Garcia R. , Gómez-Camacho J. , González-Romero E.M. , Guerrero C. , Lerendegui-Marco J. , Llanos M. , Martínez T. , Martínez-Nouvilas V. , Mendoza E. , Murias J.R. , Orrigo S.E.A. , Pérez de Rada A. , Pesudo V. , Plaza J. , Quesada J.M. , Sánchez A. , Sánchez-Tembleque V. , Santorelli R. , Tengblad O. , Udías J.M. , Villamarín D.
Published: December 2023

miniBELEN-10A is a modular and transportable moderated neutron counter with a nearly flat detection efficiency up to 8 MeV. The detector was designed to carry out measurements of (α, n) reactions in the context of the Measurement of Alpha Neutron Yields (MANY) project. In this work we present the results of the commissioning of miniBELEN-10A using the relatively well-known thick-target neutron yields from 27Al(α, n)30P.
Phase Transitions under Strong Magnetic Fields in Neutron Star
Authors: Rather Ishfaq A. , Dexheimer Veronica , Lopes Ilídio
Published: December 2023

A comprehensive study is carried out on the impact of strong magnetic fields on the deconfinement phase transition inside massive neutron stars. The matter equation of state and the general relativity solutions, which also fulfill Maxwell’s equations, are modified when taking magnetic-field effects into account. We observe that the maximum mass and canonical-mass radius of stars computed using spherically-symmetric TOV equations and axisymmetric solutions obtained through the LORENE library differ significantly for large values of magnetic dipole moment. The discrepancies depend on the stellar mass being studied, as well as the stiffness of the equation of state. This indicates that the matter composition and interactions determine the magnetic field thresholds for the acceptable approximation of isotropic stars and the appropriate application of TOV equations.
Centrality Dependent Lévy Analysis of two-pion BEC Functions at PHENIX
Authors: Novák Tamás ,   for the PHENIX Collaboration
Published: December 2023

We present most recent PHENIX preliminary data on centrality dependence of two-pion Bose-Einstein correlation functions measured in √SNN = 200 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). The data are well described by assuming the source to be a Lévy-stable distribution. The Lévy parameters, R, α, λ are measured in 18 bins of transverse mass (mT) for 4 centrality intervals. The Lévy scale parameter R(mT) decreases with mT and exhibits a clear centrality ordering which supports its geometrical interpretation. The Lévy exponent α(mT) is independent of mT in every centrality bin but shows some centrality dependence. At all centralities α is significantly different from that of a Gaussian (α = 2) or Cauchy (α = 1) source distribution. The Lévy strength parameter λ was also investigated. We observed that λ(mT) decreases at low mT and saturates around mT = 0.6 GeV/c2. In the already published 0-30% centrality class, Monte Carlo simulations are found to be inconsistent with the measurements, unless a significant reduction of the in-medium mass of the η′ meson is included.
J/ψ Near-Threshold Photoproduction off the Proton and Neutron with CLAS12
Authors: Tyson R. , McKinnon B. , Ireland D.G. ,   the CLAS Collaboration
Published: December 2023

Near-threshold J/ψ photoproduction is a key aspect of the physics program at the Thomas Jefferson National Accelerator Facility (JLab) 12 GeV upgrade due to the wealth of information it has to offer. J/ψ photoproduction proceeds through the exchange of gluons in the t-channel and is expected to provide unique insight about the nucleon gravitational form factors and the nucleon mass radius. The JLab based CLAS Collaboration, which uses the CEBAF Large Acceptance Spectrometer (CLAS12), aims to measure the J/ψ near threshold photoproduction cross section using both a proton and a deuteron target, from threshold up to 10.6 GeV. The deuteron target further offers the possibility of comparing the proton and neutron gluonic form factors and mass radii in a first measurement of the cross sections off a proton or neutron within the deuteron target. The analysis towards these measurements is ongoing and well advanced, with machine learning based techniques for particle identification already designed and validated with CLAS12 data.