bluuebunny/crossref_metadata_2025 huggingface dataset:
Separate Results of the Application of the Software Authentication Tool by Keystroke Dynamics
Authors:   Volgograd State University, Ermisheva Yulia , Omelchenko Tatyana ,   Volgograd State University
Published: December 2023

The process of user authentication in various systems deserves special attention when it comes to the need for reliable confirmation of access rights of access subjects to access objects. The speed of the spread of information flows in modern society, the transition to remote connection to information systems and their use in all spheres of human life encourage attackers to search for ways to bypass methods that allow distinguishing the right users of the system from all others. This means that the task of increasing the reliability of the authentication process in enterprises and organizations is urgent, the basis for the full functioning of which is the possibility of providing remote access to information systems for users. The analysis of existing authentication methods and processes has shown authentication has been carried out exclusively on a single basis cannot always sufficiently confirm the authenticity of the information system subjects, which means that it is necessary to consider the possibility of building a twofactor authentication model. Within the ongoing research, we decided to develop a software tool that implements a two-factor authentication model using a password (the simplest and most common method) and biometric (guaranteeing the highest accuracy compared to the other existing methods of identity verification) components. Among the considered methods of biometric authentication, special attention has been paid to keyboard monitoring, aimed at solving the problem of recognizing keystroke dynamics and allowing to contribute to the construction of a subsystem for information protection in computer systems during user identification and authentication procedures. The main result obtained during the experimental study of the application of the developed software tool is to limit the possibility of obtaining unauthorized access to corporate information due to a more accurate identification of the authentication of the subjects of information systems.
Selection of Radio-Absorbing Coating According to the Specified Criteria
Authors:   Volgograd State University, Kakorina Olesya , Kakorin Igor ,   Volgograd State University, Panchenko Alexandra ,   Volgograd State University
Published: December 2023

From noisy urban centers to remote mountain peaks, we are accompanied by electromagnetic signals. These information-carrying waves cause much of our modern world to move and function properly. But they are also destructive. The sheer number of signals creates a problem of radio interference. This problem is solved by radio frequency and electromagnetic shielding. RF shielding involves shielding a device from signals that are in the frequency range used for radio transmission. Shielding against electromagnetic interference involves shielding against higher frequencies, used for applications that go far beyond radio transmission. Both types of signals can interfere with the operation of electronic devices, and many devices must be protected from both. The materials and coatings used for shielding vary greatly in their properties, shielding capacity, and price. The paper considers a software package that allows, according to the necessary criteria, to select the appropriate radioabsorbing coating.
The Influence of Protective Forest Plantations on the Microclimate of the Agricultural Landscape in the Dry-Steppe Zone of Chestnut Soils
Authors:   Federal Scientific Center of Agroecology, Complex Melioration, and Protective Afforestation of the Russian Academy of Sciences, Potashkina Yustina , Ivantsova Elena ,   Volgograd State University
Published: December 2023

The article presents the results of correlation and regression analysis of the interrelationships of microclimatic indicators and the distance from the forest strip. Field studies were conducted in the dry-steppe zone of chestnut soils during 2020–2021 in the summer, autumn, and winter periods. The object of the study is a fortyyear old protective forest strip of openwork construction of the Kachalinskoye experimental-production farm of mixed breed composition of small-leaved elm (Ulmus parvifolia J.) and golden currant (Ribes aureum P.) along the edges of the strip. In the course of the analysis, various degrees of dependence of the studied factors on each other were revealed. Correlation analysis revealed a positive relationship (on the Cheddock scale) between the distance from the forest strip and wind speed (r = 0.94–0.96), humidity (r = 0.83–0.86), and air temperature (r = 0.80–0.89). The average and strong correlation between microclimatic indicators and the distance from the forest strip is noted in part of the measurements for soil humidity and temperature. The obtained regression models and determination coefficients indicate the proximity of the mathematical model to empirical observations.
Fauna of Dendrophilous Phyllophages in Green Spaces of Urban Ecosystems
Authors:   Volgograd State University, Nguyen Minh , Ivantsova Elena ,   Volgograd State University, Nguyen Thi ,   Hanoi University of Industry
Published: December 2023

The article presents a literary review of the fauna of dendrophilous insect phyllophages in the green spaces of urban ecosystems. A significant number of works by both domestic and foreign researchers have been devoted to the study of the entomofauna of green urban areas; however, the data on Volgograd are fragmentary and are devoted to individual groups of insects or individual ecosystems, which indicates the relevance of studying the complex of dendrophilous phyllophages in landscaping plantings in the conditions of our region. The degree of study of the problem is considered, the results of previously published research papers are generalized and systematized, and further prospects for studying the features of the formation of the fauna of green spaces, changes in its composition, and structural characteristics of trophic groups and individual species are determined, which is of significant scientific and practical interest and can be used to ensure a rational approach to the preservation and maintenance of the state of green urban areas.
Revegation Analysis Within the Shurupov Quarries Based on Remote Sensing Data
Authors:   Volgograd State University, Khavanskaya Natalya , Novochadova Arina ,   Volgograd State University
Published: December 2023

The article presents an analysis of restoration processes within two quarries located in the northwest of the Shurupovsky Khutor in the Frolovsky district of the Volgograd region. The described methods of revegetation analysis within the quarry-dump complexes included images from the USGS Earth Explorer portal (US Geological Survey). The Landsat-5 TM satellite images were used in July 2007, Landsat 8 OLI_TIRS was used in July 2015, and Landsat 9 OLI_TIRS described the status in July 2022. Using the ArcGIS geoinformation system 10.3.1, we considered multispectral images of different times and calculated the Normalized Difference Vegetation Index (NDVI) for 2007, 2015, and 2022. As a second index, we calculated the NDVI trend for 2007–2015 and 2015–2022. Based on the results of interpretation, the assessment of changes in the vegetation cover of quarry-dump complexes was carried out. As a result, it was revealed that the vegetation cover of quarries demonstrated different restoration pathways despite their close territorial location. By 2022, the NDVI of the eastern quarry did not exceed 0.2, and the NDVI of the western quarry increased to 0.5. However, in general, there is a positive NDVI trend in the territories of both quarries. Resulting from the data obtained, NDVI maps and NDVI trend maps for the studied quarries were prepared. Tables for calculating changes in the areas of flooding and vegetation cover of the Shurupov quarries for 2007, 2015, and 2022 were created in MS Excel.
Transport Accessibility Assessment in Ural Federal District
Authors:   Plekhanov Russian University of Economics, Sargina Anna , Sedova Nadezhda ,   Plekhanov Russian University of Economics
Published: December 2023

Transport accessibility is one of the most important factors of social and economic development of regions. The level of regional development depends on the level of transport system development, transport infrastructure as one of its components, and the level of transport availability and accessibility. The level of transport availability varies in the regions of the Russian Federation. The purpose of this paper is to assess transport infrastructure development in the regions of Ural Federal District, which includes the analysis of quantitative indicators of transport infrastructure. The study uses general scientific methods of analysis, synthesis, comparison, and correlation. The study of automobile, railway, inland waterway transport on the territory of the regions of Ural Federal District was carried out. The calculation is based on the following indicators: transport network density in relation to the territory, transport network density in relation to the population, Engel coefficient, Ouspensky coefficient, Goltz coefficient. The evaluation of spatial transport availability shows that Ural Federal District is characterized by an average level of transport availability, if compared with the calculations for the country. For the period from 2012 to 2021, the density of railways and inland waterways has not changed, while the density of roads has increased by 39%. The regions that are outsiders are the Khanty-Mansi Autonomous Okrug and Yamalo-Nenets Autonomous Okrug, which is mainly connected with geographical factors. Insufficient density of road and railway networks in these regions is partially offset by the developed inland water transport. The assessment of transport availability showed the need to improve the transport infrastructure. The indicators calculated in the analysis can be used to analyze and monitor changes in the transport availability of regions during the realization of infrastructure projects.
Project Master Plan for Kazan Agglomeration as a Basis for Supporting Regional Projects
Authors:   Kazan National Research Technical University named after A.N. Tupolev, Yusupova Irina , Safargaliev Mansur ,   Kazan National Research Technical University named after A.N. Tupolev, Arzamasova Alfiya ,   Kazan State Power Engineering University, Seleznev Daniil ,   Kazan National Research Technological University
Published: December 2023

Recently, the tasks of balanced spatial development have been successfully solved by means of use of well-established scientific tools for agglomeration development. This type of spatial development provides for the need to ensure integrated transport and communication accessibility for infrastructure development of social and economic potential of the territory and taking into account many factors to increase the efficiency of the functioning of the elements of agglomeration system. A key element of strategic development of the agglomeration is the development of appropriate project master plans. The article provides scientific substantiation of approaches to the development of a master plan for Kazan agglomeration. The development of Kazan agglomeration is the result of the process of self-organization and selfdevelopment of the city of Kazan and its surrounding municipalities. As a basis for the development of a polycentric agglomeration, intensive ties between the elements of the territorial system are analyzed: elements of residential development, social, transport, and engineering infrastructures growing together. Common markets for housing, labor, and services have been formed and are developing. The model of the territorial development of Kazan agglomeration is analyzed, which includes three main parts, i.e., organizational, regulatory, and legal support, financial mechanism. The organizational part is based on a long-term plan of social and economic institutions in the region. Regulatory support for agglomeration development is provided by relevant federal laws. As one of financial instruments, the authors suggest an infrastructure menu as well as tools that provide the opportunity to reduce the debt of a constituent entity of the Russian Federation to the federal budget on state loans. Taking into account the long-term nature and importance of the development of these documents for the further balanced social and economic development of territories, the need for immediate organization of work on similar preparatory work in terms of the development of inter-municipal teams, their training, and the collection of primary information on the Kama and Almetyevsk agglomeration was proved.
Formation of Strategic Priorities for Old Industrial Regions’ Development of Southern Russia
Authors:   Volgograd State University, Kurchenkov Vladimir , Kiselev Mikhail ,   Volgograd State University, Sokolov Sergey ,   Volgograd State University
Published: December 2023

In the conditions of turbulence of the world economy, the formation of regional strategic priorities that contribute to ensuring sustainable economic growth and improvement of life standard of the population plays a special role in the sustainability of the country’s development. The existing stratification of regions determines the need to study the features of the development of such a category as the “old industrial region.” The aim of the study is to form strategic priorities that contribute to regional development of territories with predominant industrial production located in the south of the country. The methodology of the study includes statistical analysis of individual social and economic indicators of the situation of old industrial regions of the South of Russia in dynamics. The methods of retrospective, factorial, comparative, economic-statistical, and situational analyses were applied. As a result of the conducted research, the definition of the term “old industrial region” is given, which allows to present the specifics of this territorial unit. The paper analyses a number of key economic indicators of the Astrakhan, Volgograd, and Rostov regions, which allows to assess the state of the region and the potential of its innovative development. The authors draw conclusion that, despite the common initial characteristics of old industrial regions of the South that appeared after the collapse of the Soviet Union, each of them, having a heterogeneous resource base, needs an individual approach when choosing strategic development priorities based on a detailed analysis of economic indicators as well as their potential. Old industrial regions can move along three different development trajectories: modernization of existing industries with the introduction of innovations; development of new areas of industrial production; orientation to the post-industrial type of economic development with an emphasis on the service sector. At the same time, such regions need attention and involvement from the state, but in different degrees and forms.
Spatial Development of Rostov Region in the Context of Modernization Transport and Logistics Complex
Authors:   Federal Research Centre the Southern Scientific Centre of the Russian Academy of Sciences, Patrakeeva Olga
Published: December 2023

Infrastructure is an important factor for strengthening regional economic relations and a required material improvement for balanced development. In Rostov region, the traffic intensity is one of the highest among regions in the Southern Federal District. Significant infrastructural constraints of the region’s development are insufficient quantity of detours for transit transport, leading to congestion of roads, settlements whose residents do not have regular bus (rail) communication with the administrative center. The axis of economic development of Rostov Region is being formed between urban agglomerations along transport corridors. Strengthening cooperation between the centers of economic activity will increase their overall competitiveness and contribute to the coordinated development of adjacent territories. The development of agglomerations involves the formation of new external functions and the restructuring of the internal space. The inclusion of municipalities in megacities involves the implementation of administrative decisions devoted to infrastructure. The Regional Law on Agglomerations provides for the possibility of concluding agreements on intermunicipal cooperation as well as unified approaches to common issues’ solution such as education, healthcare, transport, and urban environment. At the same time, clarifications are required in terms of agglomerations’ limits specification. In addition, it is required to assess the availability, road network, and infrastructure development potential. The analysis indicates an unbalanced internal economic development of Rostov Region due to weak transport links outside the agglomerations.
Category “Economic Resources”: Current Emphasis in the Context of Spatial Analysis Methodology
Authors:   Financial University under the Government of the Russian Federation, Makar Svetlana , Stroev Pavel ,   Financial University under the Government of the Russian Federation
Published: December 2023

We devote the article to the study of the category “economic resources”, as well as its relationship with the category “economic space.” Attention is drawn to the process of changing the meaning of “economic resources” over time during societal crises. In the study, we looked back at concepts and individual views that reflected various contexts where the category of “economic resources” was analyzed and an attempt was made to understand how they are distributed in space. The object of study is economic resources. The purpose of the paper is to determine the key prerequisites for the modern application of the category “economic resources.” The subject of the study is the attributes of economic resources. The authors used the main approaches to economic research: historical, logical, cognitive, normative, empirical, etc., as well as analysis methods (complex, statistical, comparative, retrospective content analysis), indicative methods, economic, and mathematical modeling. The results of the work and their novelty are that the author’s definition of the concept of “economic resources” is presented in relation to the category of “economic space.” The broad umbrella of “economic resources” was subjected to a retrospective investigation and review of existing theoretical approaches. After systematizing the linkages between the expression “economic resources” and associated subjects, the elements of the category’s relationships were found. They present two groups: “flat” and “volumetric” categories. Recommendations for the practical use of the results. The research materials can be used in the process of spatial management improvement and planning at the national level, considering the current geopolitical and geoeconomic situation.
Sustainable Development of Agro-Industrial Complex of Volgograd Region in the Context of Digital Transformation
Authors:   Volgograd State Agrarian University, Popova Larisa , Lata Mariya ,   Volgograd State Agrarian University, Kleytman Elena ,   Kutafin Moscow State Law University (MSAL), Melikhov Petr ,   Volgograd State Agrarian University
Published: December 2023

The sustainable development of the agricultural sector of regional economy is directly connected with the level of its innovative and digital development, which, in turn, mediates the readiness of the regional agro-industrial complex for digital transformation and transition to a fundamentally different technological mode of agricultural production. This paper presents the results of theoretical, scientific, and practical analysis of sustainable growth conditions of the regional agro-industrial complex by means of development of digital technologies and the level of innovative development. The research is based on the author’s concept of the interdependence of digital technologies’ use with the achievement of positive dynamics of the main indices of agricultural production in the region. The paper presents for discussion of the scientific community an original mathematical model of sustainable growth dependence of the agricultural sector of the regional economy on digital development index (DDI). The purpose of this study is a theoretical, scientific, and practical understanding of the use of the scientific and technical potential of agrarian economy of the region for the introduction of digital and innovative technologies in agricultural production in the context of overcoming the economic crisis that resulted from the COVID-19 pandemic and the return of the agro-industrial complex of the region to sustainable growth under Western sanctions. The result of this analysis, according to the authors, should be conclusions about the admissibility of scientific generalizations in the field of economic feasibility and the lack of alternatives to the use of digital technologies as a driver of sustainable development of the regional agro-industrial complex under the sanction’s pressure and overcoming the consequences of the COVID crisis. The results of the work can be used in the concept of sustainable development of the agrarian economy of the region, depending on development level of existing and promising digital ecosystems built on the domestic element base and Russian software use through the Digital Development Index (DDI), defined as a set of the given indices of digital and innovative infrastructure of the industry.
Application of Production Functions of Education in the System of Analytical and Predictive Simulation
Authors:   Baranavichi State University, Klimuk Vladimir
Published: December 2023

This research is focused on the importance of education system improvement as a fundamental basis for human capital development. The object of research are the results of scientific, innovative-entrepreneurial, educational, and international activity of the system of higher education of the Union State of Belarus and Russia and the institution of higher education “Baranavichy State University” in particular. The subject of research are the tools of simulation of activity results of institutions of higher education on the basis of optimal combination of resource costs when using production functions. The problem is identified. It is connected with the application of production functions of education as the tool of forecasting, planning, and quick adjustment of key indicators of efficiency assessment of educational environment taking into account the changing conditions. The review of scientific sources reflecting the issues of production functions’ application including the area of education was made. The author presented the algorithm of application of production functions in the sphere of education as the instrument of analysis and forecasting effective indicators on the basis of combination of various sets of resources (factors). Herewith, the priorities of activities of institutions of higher education are systematized into four groups of possible results (activity efficiency indicators). They are scientific and research priority, innovative and entrepreneurial priority, competence, and integration. In the framework of each priority the anticipated results are given (12 indicators reflecting the results of performance of mentioned priorities). The development of several options of determining the optimal combination of resource (factors) costs to achieve the planned results in the formalized form of production function of education, corresponding to the mentioned priorities, is presented. The development of production functions for three options is suggested. The first option is an integrated indicator constructed on the basis of standardized coefficients of several indicators within labor and investment factors. The second is a local coefficient which is made on the basis of development of individual production functions for a specific performance indicator of a specific educational organization. The third variant is a systemic ratio which is made on the basis of the development of specific production functions for specific result of national education system.
The Specifics of the Strategic Development of Large Urban Agglomerations
Authors:   Volgograd State University, Derebizova Mariya
Published: December 2023

The social and economic development of the country largely depends on the level of social and economic development at each level of the budget system, especially at the level of municipalities as basic administrative territorial units. The article is aimed at studying and systematising specific features of strategic development of large urban agglomerations. The research involves methods of comparison, analysis, synthesis, and induction. The article analyses academic and normative approaches to the use of terms “strategic planning,” “strategic management,” “strategic development,” formulates the structure of the relationship between concepts, reflects the system of documents, on strategic development at each level of the budget system. As a result of the analysis, the article reveals the problem of identification of the concepts of “strategic management” and “strategic development.” The author specifies the concept of “strategic development” and establishes the structure of the relationship between concepts. The article describes a complex of factors that influence the social and economic development of a large urban agglomeration, substantiated the existence of the relationship between factors of internal and external influence, analyses the main strategic documents, identifies the main directions of strategic management and development. The article identifies the role of the municipal budget in social and economic development, describes trends in economic development, the level of financial independence of large cities, interrelations between economic and strategic development. The article studies characteristics and tendencies of development of large urban agglomerations, identifies strengths and weaknesses, formulates measures aimed at improving the quality of management of social and economic development. The practical significance of the study lies in the possibility of its application by local governments of large urban agglomerations in the decision of strategic development issues.
MEASURES TAKEN IN SCHOOLS DUE TO EPIDEMICS IN THE LATE OTTOMAN AND EARLY REPUBLIC PERIOD
Authors: ASLAN Halide
Published: December 2023

Epidemics such as plague, measles, malaria, cholera, and Spanish flu affected the Ottoman Empire in every way, and various measures were taken in various fields according to the conjuncture of the period. The reason for choosing the last period in this study is that more epidemic detections have been made and the records of this period are high. After the 1800s, different epidemics with certain processes and results were experienced in the Ottoman Empire for certain reasons. Some of them affected the state at the micro level and some at the macro level. Undoubtedly, the most affected part of the epidemics were children, especially children of education age, who both accelerated the process of being affected by the disease and became the fastest intervention group. The Ottomans took separate measures regarding education during epidemics. These measures, which include schools, teachers, students, places of residence, and parents from time to time, have had an institutional impact on the state. When we look at the archive documents, issues such as the vacation of schools, vaccination policies, dissemination of disinfection studies, raising awareness among students and their parents, arranging separate allowances for these issues, and financial and moral support of teachers in this regard have been the most mentioned issues regarding epidemic and educational measures. This study, which we will prepare with the document analysis method, mostly based on the Ottoman archive documents and the chronicles of the period, aims to reveal the measures taken by the state to prevent the disruption of education despite the epidemics of the period.
“We Are The Future”: Career Attitudes of MilleniGenZ College Students
Authors: Nguyen Kelly M.
Published: December 2023

Millennials make up the largest segment of the workforce today and it is estimated that by 2025, 75% of the global workforce will comprise this emerging generation (Fry, 2018). In this current study, I examine the career attitudes of Latinx and Asian American Millennial and Gen Z college students to understand better how their unique college experiences- shaped by their familial, cultural, and personal backgrounds – can inform how they imagine their post-college trajectory. Specifically, I explore to what extent these sociocultural influences impact MilleniGenZ’s interest and attainment in leadership roles within their future careers. Two sets of surveys were administered. A 184-question survey was administered to college students in Southern California in 2017 (N=936), and in 2020, an updated 211-question survey was administered (N=742). The findings show the importance of providing better career resources (e.g., workshops, mentorship, networking opportunities) for MilleniGenZ during college, which will ease their transition into the workforce and potential leadership roles. The findings of the current study contribute to the existing literature by unpacking how complex sociocultural factors intersect to influence Latinx and Asian American college students’ career attitudes. Based on our findings, institutions, and organizations should incorporate diversity and inclusion considerations into the career planning process to support individuals in overcoming systemic barriers.
SETTING THE SUITABILITY USE OF SAWMILLS BROWN COAL IN THE CONSTRUCTION INDUSTRY
Authors: N. A. Nikiforova  , A. Yu. Dryzhenko  , I. L. Safronov  , V. I. Stetsyuk
Published: December 2023

Researches results are resulted furnaces of breeds of the Novo-Dmitrievskoe deposit of brown coal and recommendations are given on their use as building materials
RESEARCH OF STABILITY NONCENTRAL COMPRESSED OF COMPOSITE BAR
Authors: K. I. Soldatov
Published: December 2023

In a publication the decision of task of stability of the compressed bar is resulted with the use of model as the stratified system. The bars of the stratified beam are connected by resilient discrete supports (by slats) or resilient layer
AN INTEGRATED ADDRESSING DEVELOPMENT ISSUES THE CITY OF DNEPROPETROVSK WITH ALLOWANCE THE MASTERING OF THE UNDERGROUND SPACE
Authors: А. N. Shashenko  , А. V. Solodyankin  , M. А. Vygodin
Published: December 2023

The problem questions of development of infrastructure of central part of city of Dnepropetrovsk and mastering of underground space are considered taking into account tts and limitations of powers of life-support of building objects. Some aspects of complex decision of mastering of underground space are offered in a center a city, including at the reconstruction of buildings, buildings jointly with the underground objects of underground passage of communicating tunnels for a location in them of engineerings communications, and also drainage galleries for the decision of problem of local and regional submergence
ESTABLISHMENT OF POSSIBILITY OF THE USE OF COVERING BREEDS OF QUARRIES OF BROWN COAL IN BUILDING INDUSTRY
Authors: N. А. Nikiforova  , V. O. Momot  , O. O. Vergun
Published: December 2023

The results of research of influencing of the modified additions are resulted on the frost-resistance of heavy concrete.
PRINCIPLES OF THE AUTOMATED CALCULATION OF PARAMETERS OF BUILDING AND RENEWAL OF FROST-HARDY REINFORCED CONCRETE BUILDING
Authors: А. А. Tchub
Published: December 2023

The article shows the possibility of establishing patterns of organizational and technological parameters that provide a significant increase in the surface layer of frost resistance in concrete during its formation, in the process of construction and restoration of any reinforced concrete structures, using the methods of programming. The need for an automated method of calculation due to the diversity of concreted structures: linearly-extended, scattered, etc., and in their recovery – the degree of diversity and complexity of their failure recovery.
CLASSIFICATION OF RETAINING WALLS
Authors: V. Т. Guzchenko  , М. А. Lisnevskyy
Published: December 2023

Classification of various retaining walls structures is given in the article. It gives special attention to material saving structures. Particularly this article talks us about structures of retaining walls with membrane materials andreinforced earth. Retaining walls with application of reinforced concrete shell structures of the various shapes, wall on pile foundation, gabion walls and anchor counterfort retaining walls are noted.
THE RESEARCH TO DETERMINE CHLORIDE DIFFUSION COEFFICIENT IN CONCRETE
Authors: Е. S. Karapetov  , D. A. Shestovicky
Published: December 2023

The article deals with the problem of low service life of reinforced concrete bridge structures. Particular attention is given to the lack of values in the regulations of the diffusion coefficient of chloride in concrete, as a determining parameter in assessing the durability of reinforced concrete bridges on physical models of degradation. The description of the experiment to determine the diffusion coefficient of chloride in the concrete and the dependence of strength, water absorption and ultrasound in the concrete, is given.
INVESTIGATION OF THE STRESS-STRAIN STATE OF PRESTRESSED REINFORCED CONCRETE BEAMS USING METHOD DIGITAL IMAGE CORRELATION
Authors: P. M. Koval  , YA. L. Ivanytskyj  , Y. Molkov  , Y. I. Kovalchyk
Published: December 2023

The results of investigation of prestressed concrete beams using the method of digital image correlation are presented. Found that this method can be applied in testing and inspection of reinforced concrete structures to obtain information about their mode of deformation.
MODELLING OF SPAN STRUCTURES OF BRIDGES ON THEIR ACTUAL MODAL PARAMETERS
Authors: V. P. Redchenko  , V. N. Kosyak
Published: December 2023

In the article the models of linear dynamic systems are considered, it is offered a technique of modelling of such systems using their actual modal performances.
ALGORITHM ОF THE VERTICAL MINE SHAFT LINING STABILITY CALCULATION CONSIDERING IT CONTACT INTERACTION WITH A ROCK MASS
Authors: А. А. Sivtsov  , G. V. Desyatykh
Published: December 2023

Based on the elastic contact problem solution, analytical relations for evaluation of critical pressure on a shaft lining deduced. Comparison of calculation results by the proposed algorithm with existing methods adduced.
MODERN METHODS OF REINFORCEMENT OF WEAK FOUNDATIONS OF ROADS
Authors: L. М. Timofeeva  , E. S. Krasnov
Published: December 2023

The article discusses the method of reinforcing weak foundations of automobile roads in the Urals that uses soilcement piles produced through jet grouting. The article demonstrates that armed ground pile foundations lead to substantial increase of the bearing capacity of the foundation, however the effectiveness of the method largely depends on the thickness and the lithologic composition of the foundation soils.
CHOICE OF EFFECTIVE MATERIALS FOR A HYDROTECHNICAL CONCRETE
Authors: А. Krasnuk  , V. Momot  , N. Nikiforova
Published: December 2023

Purpose. Determination of rational correlation of materials is the important stage of technology of hydrotechnical concrete in composition a concrete mixture. Properties of concrete mix are determined both by granulometric composition and the volume and properties of the binder. Methodology. He structure of cement-sandy solution of enhanceable mobility is investigational experimentally for a pipeline transport. Findings. It is set on the basis of analysis of the conducted researches, that the receipt of hydrotechnical concrete with the set properties is possible as a result of application of the special technology of concreting with the use of high-mobile cement-sandy solution with active one micro by filling in a complex with the plasticizer modified for the terms of submarine application. Originality. Possibility of receipt of hydrotechnical concrete is well-proven with the set properties by an injection method with the use of cement-sandy mixture. Practical value. Complex of technological actions has allow ensure a reception of concretes with given characteristics for undersea working the classes B15…B25 when reducing a consumption of cement on 15 % in the comparison with the traditional technology.
TECHNOLOGY OF MAKING OF ARMATURE WITH HIGH LEVEL OF DURABILITY
Authors: I. A. Vakulenko  , S. V. Proydak  , N. N. Grichenko  , N. A. Grischenko  , Yu. L. Nadezhdin  , S. А. Plitchenko
Published: December 2023

Purpose. Assessing the impact of technological parameters on the properties of the complex in the manufacture of valves with a high level of safety. Methodology. Material for the study was selected alloy steel 20ХГС2. Curing rods with a diameter of 6,5 mm was performed rapid cooling from temperatures of 1080…1100 °C. The heating was carried out in Vacation chamber furnaces. Cold plastic deformation was carried out by drawing. Mechanical properties were determined from the analysis of stress-strain curve. The microstructure was studied using light microscopy and methods of quantitative metallographic. The parameter evaluating thin crystalline structure of the metal line width has been used ( ) x-ray interference (220). Findings. Shows the change in the properties of the complex as a function of temperature end of accelerated cooling of steel wire rod, which is being investigated. The analysis of the structural state of rolled after heat strengthening and after various degrees of plastic deformation by drawing. Shown that 20…30 % after deformation rapidly cooled to a temperature of steel 20ХГС2 580…600 °C, elongation is maintained at the level of 6 %, while the strength reaches at values of 2000-2100 MPa. Using the tempering at an intermediate temperature can improve the plastic properties of the pre-heat-strengthened, cold-rolled steel. Originality. The deformation of the thermally bonded low-alloy steel 20ХГС2 accompanied by a monotonic decrease in the line width of x-ray interference (220). Rate of increase in strength during cold deformation of steel martensite-bainite structure is due to the simultaneous development processes from the decay of the softening of martensitic structures and deformation strengthening. Practical value. The research results can be used to develop high-technology manufacturing reinforcing bar in an industrial environment for steel making
RESEARCH OF EFFICIENCY OF USING CARBON FIBER IN ARNORED CONCRETE SPANS OF RAILWAY BRIDGES
Authors: V. G. Vyskrebentsev  , K. I. Soldatov
Published: December 2023

Purpose. This work presents using carbon fiber as composite rebar by way of rods of fittings for reinforcement armored concrete span 13,5 meter length compared to same-length span with usual fixture. Methodology. The calculation is carried out as described in the methodological guidelines for the design and calculation of concrete span with frame-welded fittings. Findings. On the basis of the above study was to determine how the use of composite reinforcement as working for the reinforcement of its span. Originality. The possibility of using composite rebar as an element that works in tension in the span was proved. Practical value. Install valves of this type will reduce the cost of the span and increase its operating period.
GUIDELINES FOR IMPLEMENTATION OF HIGH SPEED TRAINS ON EXISTING CONTINUOUS CONCRETE SPAN
Authors: А RASPOPOV  , А MARINICHENKO
Published: December 2023

Purpose. Analysis of existing high-speed railway traffic Ukraine, fitness track and engineering structures for high-speed trains, determine the possibility of the introduction of high-speed railway traffic on existing reinforced concrete bridge with a continuous spans. Determination of factors influencing the dynamic behavior of bridges under moving loads, influence design parameters and rolling stock. Interaction train and span. Methodology. The choice of a continuous reinforced concrete spans for the analysis, development models span for dynamic analysis,dynamic analysis and calculation behavior spans under high-speed loading. Findings. Analyzed the work of continuous reinforced concrete span under load depending on the speed. These values deflections and accelerations span for different speeds. The possibility of crossing high-speed trains with different speeds. Originality. The possibility of crossing high-speed trains on the existing span of the parameters of the stress-strain state of a moving load (maximum displacement and acceleration span). Practical value. Determination of the suitability of existing reinforced concrete spans of continuous movement for high-speed passenger trains at different speeds.
THE RESULTS OF THE NATURAL RESEARCHES OF CONCRETE SUPPORT STRUCTURES OF THE SUSPENSION BRIDGE AND DETERMINED OF COST OF THE MOST DAMAGED SUPPORT
Authors: V. GRECHKO  , О. GRECHKO
Published: December 2023

Purpose. The results of the natural researches executed within the limits of preparation of certificate of technical state of concrete support structures of the suspension bridge are considered in the article. Methodology. The suspension bridge was designed by the institute «Giprotransmost» and was set in operation 35 years ago. The bridge consists of one suspension bridge span in length 720m and 10 concrete support. Findings. The definition of stress-strain state of the most damaged support is executed. Originality. The recommendations about restoration of serviceability of thedamaged designs are developed. Practical value. Research results will be used in the repair of the bridge supports.
ANALYSIS OF THE POSSIBLE ROD FAILURE CAUSES IN THE CURVED VIADUCT OVER SLUICES OF THE DNIEPER HYDRO POWER PLANT (HPP)
Authors: B. D. SUKHORUKOV
Published: December 2023

Purpose. Determine causes of the rod rupture and take them into account during restoration of the rod. Methodology. A finite-element model of the overpass is suggested achieving this goal. Software «Lira» has been used to obtain influence lines of longitudinal forces that arise in the cross-beam and transmitted to the abutments. Findings. The forces in the rod are calculated for different types of external actions, namely, a temporal moving load, temperature fluctuations and wind load. Numerical analysis has been performed to figure out effects of each of these actions. Originality. New effective approach is proposed to analyze causes of bridges failure. Practical value. The most unfavorable combinations of the external factors are determined that cause the highest loads in the rod. Ithelped to outline measures for restoration and reinforcement of the rod.
ANALYSIS CRACK RESISTANCE OF REINFORCED CONCRETE BLOCKS AS A PRACTICAL RESOURCE PROJECTIONS APPARATUS
Authors: L. L. YANCHUK
Published: December 2023

Purpose. Development of methodology for prediction of the concrete bridge elements resource in the design phase. Methods. Theoretical study. Results. New algorithm for prediction resource bridges reinforced concrete elements in the design process received. Originality. Methodology of the bridges reinforced concrete elements design on the specified service life carried out for first time. Practical value. The resulting algorithm is a life management practical tool in the design process of highway bridges reinforced concrete elements.
EXPANSION JOINT WITH ELASTIC COMPENSATOR
Authors: К. I. SOLDATOV  , S. V. KLUCHNIK
Published: December 2023

Purpose. The purpose of given research is the development of the expansion joint for city highway and railway bridges that is both easily manufactured and cheap. Methodology. To reach the set goal available materials and specific design with elastic compensator were used. Findings. Expansion joints with elastic compensator that are applicable for the city bridges with limited span length and for railway bridges with ballasted bridge deck were proposed. Originality. Proposed design of the expansion joint uses the arch effect of the elastic compensator itself. Practical value. Proposed design has a low cost, is easy in the installation and easy in the operation. In the conditions of economic crisis and current state of the large number of defective expansion joints on the bridges of the county, the possibility arises to fix these flaws in quite a low cost.
DETERMINATION OF BEARING CAPACITY OF METAL SPANS WITH SOLID WALL WITH UPPER-LEVEL TRAFFIC BY THE MAGNITUDE OF THE ELASTIC DEFLECTION FROM RAILWAY LOAD
Authors: К. I. SOLDATOV  , V. А. MIROSHNIK
Published: December 2023

Purpose. The purpose of given work is the development of method for bearing capacity determination of metal spans with solid wall with upper-level traffic for the railway based on the results of static tests of given type of spans. Methodology. For the span that is being classificated the survey is being conducted and the deflection under the static load using simple measuring devises (deflectometers) are performed. Obtaining the deflection data is not complicated but gives the actual view of the span condition including hidden flaws (condition of bearing parts, corroded weakenings, that are very significant) Findings.. For the possibility of the given method of bearing capacity (class) determination for spans of given type application, first of all, from the numerous reports the selection was made of the main parameters of spans, results of static deflection measurements and load types. Based on the tests data the plot was drawn for the span experimental deflection dependence from the nominal span length. Originality. Based on the literature sources, this work is new in given direction and further such method is to be implemented for the common use by the development of the addition for the current standards [6]. Practical value. The analysis of obtained results shows that the application of given method on all the railways of Ukraine during the classification of metal spans will allow only by the recalculation to increase the actual bearing capacity of spans by 10..35 %.
ECOLOGICAL AND ECONOMIC EFFICIENCY OF THE HORIZONTAL IMPERVIOUS SCREEN FOR LOCALIZATION OF TOXIC AND RADIOACTIVE WASTE
Authors: GALINSKYI А. , MENEYLYUK А. , PETROVSKYI А.
Published: December 2023

Purpose. The definition of the ecological and economic impact and efficient use of the horizontal impervious screen in dependence on the depth of location of the impermeable soil layer. Methodology. Synthesis, analysis, mathematical methods. The technique of definition of harm size caused by pollution and clogging of land resources through violation of environmental legislation, developed by the Ministry of environmental protection and nuclear safety of Ukraine. Findings. The initial date for definition of harm size caused by pollution and clogging of land resources after horizontal impervious screen arrangement is selected. The disadvantages of governmental technique are found and the method of improvement is developed. Originality. The governmental technique of definition of harm size caused by pollution and clogging of land resources was improved. Practical value. There was made environmental effect assessment of HIS adoption in water permeable soils combined with imperfect impervious diaphragm (ID), carried out by means of “diaphragm wall” in case of natural waterproof layer of soil absence Аlso the ecological-economic effective application of HIS compared with perfect ID buried into a natural waterproof layer of soil was determined.