bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sources and Forms of Metals Accumulation in Coal-Bearing Deposits of the Southern Primorye: Validation of the “Granite-Water” Model
Authors: Tarasenko I A , Chekryzhov I Yu , Zin’kov A V , Kholodov A S 
Published: February 2022

Abstract
The work deals with the role of Paleozoic granites as possible sources of metals in coals. The process of dissolution and transfer of metals in the system “granite-water” was modeled. It is shown that the scale of accumulation of ore matter in water depends on the duration of interaction between water and rock. As a result of physical and chemical modeling, the probable set of migration forms of components and their transformations were calculated. The results of modeling indicate in favor of the assumption that the studied leucocratic granites of the pre-Cenozoic basement could be a source of metals concentrated in the coals of the Rakovka depression.
Criteria of Assessing the Current State of the Kuban River Geosystem
Authors: Dolobeshkin E V , Gumbarov A D , Shishkin A S , Kosenko O O 
Published: February 2022

Abstract
In the current state, delta geosystems should be considered from the standpoint of “sustainable” development. Therefore, the assessment of the current state of a natural object consists of analyzing changes in its basic properties and taking into account its features (the presence of zonal and azonal elements) that occur under the influence of anthropogenic human activity. Such an analysis should include the following types of criteria: criterion showing the nature of the “openness” of the geosystem (environmental factors); criterion reflecting the dynamics of changes in the supply and outflow of water into the geosystem; criterion describing the water exchange and ion exchange of coastal estuaries with the sea, and hydrochemical regime; criterion characterizing the ecological state of the geosystem (biomass stock). The results indicate that fundamental properties of the geosystem are characterized by the openness of the geosystem and azonal elements. When passing the analysis and expert assessment of the current state of the natural environment in the economic use of this territory, it is necessary to pay special attention to changes in the degree of openness (river flow), changes in the structure of the geosystem (landsliding and agricultural development of land).
Algorithm for a Forecast Assessment of Negative Changes in Underground Water in the Territory of Non-Centralized Water Supply
Authors: Romanov R V , Kuzichkin O R , Vasiliev G S 
Published: February 2022

AbstractThe water quality of non-centralized water supply sources largely depends on the presence of active karst processes. Underground waters of karst origin are a vulnerable component of the geological environment to the influence of modern anthropogenic factors that violate natural hydrogeological and geoecological conditions. One of the indicators of the development of karst processes is the level of river runoff and mineralization of underground water. The results of the analysis of these data make it possible to increase the efficiency of geoecological monitoring systems and to increase the accuracy of forecast estimates of negative changes in groundwater in the territory of non-centralized water supply. When processing heterogeneous spatial data, it is proposed to identify anomalous deviations of parameters. An algorithm has been developed that determines the critical states of karst water vulnerability indicators. A system of equations has been compiled to find the necessary value of the indicators of vulnerability of karst waters, at which the state of underground water passes into a critical state. The paper analyzes data on the salt content and electrical conductivity of groundwater at key points and the number of karst dips. Preliminary hydrogeological work was carried out to determine the conditions of movement of karst waters associated with the lithological heterogeneity of the massif and the degree of karst formation. The results obtained can be used to improve the regional model for assessing the resources of vulnerability and protection of groundwater and forecast the activation of destructive karst processes.
Geological Monuments of Transnistria: Types, State, Economic Use
Authors: Sukhinin S A 
Published: February 2022

Abstract
Geological monuments are a special type of natural monuments that reflect the features of the geological structure of the territory and the peculiarities of the occurrence of layers of the earth’s crust, the composition of rocks and minerals. In the relief geological monuments are expressed by various geomorphological objects and rock outcrops. The presence in them of unique remains of fossil flora and fauna gives particular value to geological monuments. The territory of Transnistria as a region on the left bank of the Dniester within the Republic of Moldova has the peculiarity of geological monuments. This territory mainly has a flat relief character, but in the north of Transnistria, the spurs of the Podolsk Upland have created here rocky forms, similar in manifestation features to the mountainous terrain. These features determined the presence in the region of a number of specific geological monuments that require identification, analysis and systematic monitoring of their qualitative state and changes under the influence of natural and anthropogenic factors.
Studying and Developing Fraction Technologies for Seed Separation Using Pneumatic Table Separators
Authors: Drincha V M , Dondokov Y Z 
Published: February 2022

Abstract
This article considers the development of fraction seed separation technologies using pneumatic table separators (PTS). The authors studied the physical and mechanical properties of wheat seeds including their density, dimensions, individual seed weight, friction coefficients, suspension velocity, and the form factor. The authors found some correlations for seed separation parameters using PTS. It was established that PTS separate seeds based on a set of properties, the most important of which is the seed density. The authors established that the efficient separation of difficult-to-separate seed mixes on a PTS requires separating the material before feeding it into the PTS into two equal factions based on the seed length and using the trieur cylinder. Each of the fractions should be processed independently. By creating seed mixes with more homogeneous seed lengths, it is possible to improve the separation efficiency for the mixes that are difficult to separate by 8-15% on average.
Digital Development of Agrarian Production - Institutional Approach
Authors: Zolkin A L , Matvienko E V , Suchkov D K , Shamina S V 
Published: February 2022

Abstract
The article assesses the digital transformation in relation to agriculture, especially on the basis of the technological diversity of agricultural production and crops and the associated diversity and labour intensity of production processes. The agri-industrial complex, always was a complex socio-economic system. It shall be recognized as the main and very important element of the national economy of the country, the main goals of the functioning of the complex are meeting the needs of the population in food and consumer goods from agricultural raw materials - grain, cheese, meat, butter, flour; it is necessary to create a food reserve that will ensure the country’s food security for years; ensuring the efficiency of the agri-industrial system and various structures; meeting the economic and social needs of agricultural workers. It is important to develop the agricultural sector and this is the key to the prosperity of the economy of any state in the long term perspective. This is due to the consistently high demand for agricultural products. In each country, the agricultural sector of the economy is developed at different rates. Agriculture in Russia has already experienced a recession and is slowly improving its position.
Structural Concept Features of Suspended Structures for Seismic Areas
Authors: Belash T A , Svitlik I V 
Published: February 2022

Abstract
The key task of the building design is the comprehensive elimination of hazards arising from various impacts on buildings, including seismic ones. Recently, new structural systems have been developed to ensure the earthquake resistance of buildings, as well as the already known ones are being improved. One of the types of structural systems that can be used in seismically active areas are buildings with suspended structures. There are many design solutions for buildings with suspended structures that differ in the type of supporting structure, suspension system and geometric shape. The possibility of using suspended structures under dynamic influences is explained by a load decrease in the load-bearing elements of the building due to the flexibility of these structures, as well as a large natural period of oscillations of buildings with suspended structures. Some aspects of the use of buildings with suspended structures are not fully understood, which prompted a study of the behavior of these buildings using various structural solutions in earthquake conditions. For the effective use of these structures in the practice of earthquake-resistant construction, an important issue is to understand the behavior of suspended structures under seismic influences of a wide frequency spectrum. The results of the study are presented in the paper.
Urbanized Environment Quality Assessment Methodology
Authors: Rastyapina O A , Prokopenko V V , Ganzha O A 
Published: February 2022

Abstract
Urbanized environment is a complex multi-element system. Urbanization has negative effects on the urban environment and necessitates finding balance to optimize the development of urbanized spaces. This paper proposes an urbanized environment quality assessment method based on evaluating the architecture, nature, development, technogenic effects, and infrastructure. All the aspects of urbanized development are split into positive and negative. The assessment of these aspects helps conclude how favorable urbanized environment is. The assessments must be analyzed to conclude on the quality of development. Then the aspects that score the worst should be addressed in order to improve the quality of the urbanized environment. Ranking can be done by comparing against the scores of other urbanized systems.
Mathematical Model for Assessing the Limits of Crack Resistance of Structural Steels of Large-Sized Structures
Authors: Molokov K A , Novikov V V , Domashevskaya Ya R 
Published: February 2022

Abstract
In metal structures under operating conditions, as well as in emergency situations due to overloads, the presence of stress concentrators, etc., plastic deformations may occur. Such deformation by tensile stresses introduces some damage to the structure of steel, which adversely affects its subsequent operation under cyclic loads. Preliminary relative plastic deformation, ∼ 1-6%, which occurs in structural steels under tension, unambiguously reduces plasticity. It negatively affects the endurance of the material and leads to the early formation of macrocracks. In addition, after unloading, an internal residual stress field at the meso-micro level remains in the structural elements, which also reduces the endurance limit. In causes the decrease of such an important indicator of reliability as fracture toughness, which reflects the resistance of the material to crack propagation. In this regard, designing structures, it seems important to improve the calculation methods for assessing and predicting their fatigue strength, taking into account the listed factors.
The article is devoted to the development of a mathematical model that includes dependencies for assessing the fracture toughness of metal structures according to the fracture toughness limit for all sizes of defects in the form of cracks. Analytical dependences have been obtained for calculating the relative limit of crack resistance based on the main mechanical characteristics of the state of the material. The results of the study can be used to assess the crack resistance of structural elements and welded joints pre-deformed by tension.
Comparison of Flexible Heating Elements When Used in the Fight Against Soil Adhesion to the Working Bodies of Earth-Moving Machines
Authors: Zenkov S A , Dryupin P Yu 
Published: February 2022

Abstract
In this paper, two types of flexible heating elements are considered, which can be used as heat sources in the fight against soil freezing to the working bodies of earth-moving machines. Heating cable TM-60 is designed for heating concrete and in the refrigeration industry. It can be operated at temperatures from -60 to +200 degrees. LUNG heating tape is designed for heating pipelines and technological equipment. It can be operated at temperatures from -60 to +200 degrees. An experimental study was carried out to determine the shear stress using these heat sources. Regression models are obtained and response surfaces are constructed for the interaction of variable factors for each heater. One-factor dependencies were revealed and graphical dependencies were built. A comparative analysis of the effectiveness of using the LUNG tape and the TM-60 cable has been carried out.
Reconstruction of Industrial Buildings with Replacement of Floors with Wood-Composite
Authors: Abu-Khasan M 
Published: February 2022

Abstract
The article emphasizes the importance of involving unused construction objects in the economy, while preserving their historical value. A variant of the reconstruction of floors based on tree-composite beams is proposed. The design work was carried out and the optimal variant of the work was identified. The relevance of this topic is due to the fact that the problem has a global scale, in most cases they are trying to solve it by demolishing a cultural heritage object, or replacing wooden floors with reinforced concrete or metal structures. The purpose of the published work is to propose an option for the possible return of functionality to construction objects while preserving them as a cultural heritage, using new wooden bending elements with elements of composite reinforcement.
Determination of Forces in the Meridional Rods of the Mesh Dome
Authors: Abu-Khasan M , Egorov V , Charnik D , Nikonova E 
Published: February 2022

Abstract
Currently, the construction of residential domed houses in Russia is gaining popularity. It is possible to use dome structures for the formation and reconstruction of an expressive urban environment, as pavilions, awnings, cover public spaces. The use of domes in urban development solves the problem of maintaining the landscape in optimal condition, improves its aesthetic and functional properties.
This paper discusses a technique for determining the forces in the rods of a mesh dome to simplify the search for these forces, and a study of design solutions for wooden mesh shells using the example of a dome for a pool. Also, the developed model is tied to the terrain, which makes it possible to solve part of the practical problem.
The main design parameters for the method and the algorithm for working with it are given, in the general case, taking into account different values of the coefficients of the design models.
The Relationship between the Maximum and Minimum Principal Stresses as a Strength Criterion of Brittle Materials
Authors: Duishenaliev T B , Khokhlov V A , Ushanov S V 
Published: February 2022

Abstract
An equation is obtained that expresses the quantitative relationship between the limiting values of the smallest and largest principal stresses. Using this equation, it is possible to determine all those stress states that lead to the destruction of brittle (semi-brittle) materials, as well as to construct an envelope line of limiting stress circles of the German scientist O. Mohr. The experimental consistency of this criterion is checked in comparison with the experimental data of T. Karman, A.N. Stavrogin, M.I. Koifman and M.F. Kuntysh, obtained by testing cylindrical samples of various rocks (brittle materials) under triaxial compression.
The Use of Serial Structures for Large-Span Frames
Authors: Abu-Khasan M , Egorov V , Moskalev M , Perminova T 
Published: February 2022

Abstract
The development of engineering and design, the emergence of new materials (steel, concrete, aluminum, etc.) stimulated the emergence of new types of large-span structures. The structures became lighter, this made it possible to increase the size of the overlapping area. The use of large spans is due to the operational and architectural requirements in public buildings (markets, train stations, stadiums, concert and sports halls). In industrial buildings, large spans are subject to technological requirements. The space freed from supports, covered with a large-span structure, gives the building an emotional and plastic expressiveness. The use of large-span structures makes it possible to maximize the bearing qualities of the material and thereby obtain light and economical coatings. Reducing the mass of structures and structures is one of the main trends in construction. Less weight means less material, less material to be mined, processed, transported and installed.
Specific Features of Building Transport Infrastructure in Megacities
Authors: Rudneva S E 
Published: February 2022

Abstract
The paper analyzes specific features of the transport infrastructure building in modern megacities. Recently, the issues of transport infrastructure built in many megacities and cities associated with the comprehensive solution to urban and transport problems have become noticeably more relevant. This study uses a systemic approach that helped to show continuity, scale and social orientation of the transport infrastructure in megacities. The main problems and achievements in solving transport problems in large cities are identified. The issue of the role and importance of better transport infrastructure development in megacities is considered through the prism of complex and sometimes conflicting relations between transport and environment. The current transport infrastructure challenges and problems, new opportunities and benchmarks in achieving maximum efficiency of a particular mode of transport under different conditions are indicated. Special focus is placed on the possibilities of providing convenient and shortest travelling routes between all parts of the city, as well as between external transport routes. The content of the city transport network is described and characterized consisting of a set of streets and traffic routes served by various forms of city transport, underground, ground, above-ground transport lines connected with the street network in part or not connected with it at all, for example, city railways, overhead roads, metro, monorail roads.
Water Supply Systems in Multi-Apartment Buildings and their Design Characteristics
Authors: Zotov Yu N , Strelkov A K , Mikhailova Yu I 
Published: February 2022

Abstract
The research considers ongoing changes in the current system of legal regulation in the field of water supply and wastewater disposal of multi-apartment buildings (MABs). The authors present results of operational and design standards of water consumption analysis. It is shown that the existing regulatory and technical documents need adjustment in terms of determining the maximum possible consumption of cold and hot water for MABs residential units. The paper also puts forward an algorithm of hydraulic calculation of MABs domestic water supply systems according to the methodology developed in the Academy of Construction and Architecture in Samara State Technical University (ACA SamSTU).
Power Line Pylon for Installation in Heaving Permafrost Soil
Authors: Andreeva A V , Popov S N , Savvinova M E 
Published: February 2022

Abstract
Based on analysis of known patent and scientific and technical information, new design of power line pylon has been developed, intended for installation in heaving permafrost soils. Cryophobic antifriction coating is applied to pylon surface located in active layer of soil to reduce intensity of pylon upfreezing from soil. It is proposed to place mechanical devices that increase adhesion to frozen soil below the zone of maximum summer thawing. The possibility of using polyurethane as cryophobic coating is considered. Studies have been carried out to maintain adhesion of coating to concrete surface in process of atmospheric exposure for two years.
Planning of Operational and Technological Measures based on Logical and Graphical Modeling
Authors: Dement’eva M E 
Published: February 2022

Abstract
The article presents the results of a study of the principles of planning additional measures for the engineering protection of buildings in urbanized areas with a potential risk of deformation processes based on logical and graphic modeling. We analyzed statistical data on cases of activation of exogenous geological processes in Russia, affecting buildings. The relevance of the study is justified by the need to ensure the operational reliability of water-carrying communications, which are sources of potential flooding and activation of deformation processes. The purpose of the study was to substantiate the frequency of operational measures for hidden communications to reduce the risk of leaks. On the basis of the constructed failure tree, an economic feasibility study was carried out for the optimal periods of scheduled inspections at different intervals of repair. The results obtained by the author can be used in the development of regulations for the maintenance and repair of engineering communications.
Standard Axle Loads in the Design of Motorway Pavements
Authors: Korochkin A 
Published: February 2022

Abstract
The paper considers issues of standard axle load, which is among the main design parameters when designing motorway pavements. Changing standard axle loads over time due to changes in the traffic flow composition is shown. Standard axial loads recommended for the design by the currently valid regulatory documents are given. Also, axle loads are given for trucks most widespread on domestic highways. Attention is drawn to the axle loads of modern vehicles, significantly exceeding the standard values. Also, the paper provides research data showing that more than 75 % of freight vehicles are overloaded, which also increases axle loads. These two factors – axle loads exceeding the standard values and overloaded vehicles lead to additional loads on the motorway pavement, for which it has not been designed. This, in turn, leads to the premature destruction of road pavements, the loss of their service quality, and additional costs for repairs. The paper justifies the need to increase the standard axle load when designing the motorway pavements since the use of the currently adopted value of 115 kN in the pavement design leads to insufficient strength of the pavement designed and its inability to withstand the existing loads. It is proposed to use an axial load of 150 kN as a design parameter when designing the motorway pavements.
Development Trends of Modern Multifunctional Parks
Authors: Dormidontova V 
Published: February 2022

Abstract
This paper studies the formation of a multifunctional park as a typological object of landscape architecture. The preconditions for its emergence are considered and the stages of its development are determined. It is noted that the various tasks faced by domestic and foreign designers in the XX century caused the differences between Soviet parks of culture and recreation and multifunctional parks abroad. However, multifunctional parks created in different countries, in various climatic conditions and urban planning environment, during the XX-XXI centuries, along with distinctive characteristics, have common features. These characteristics were outlined in the first multifunctional parks and became canons by the end of the 20th and beginning of the 21st centuries. The author reveals the architectural and typological principles and basic methods of designing multifunctional parks, which can serve as a theoretical basis for developing recommendations for the reconstruction and creation of new multifunctional parks.