bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Model of Plane-parallel Ship Movement Based on a Semi-linear System of Differential Equations using the Perturbation Method
Authors: Solyakov O V , Uvarova L A , Yakunchikov V V , Nadykto N B 
Published: March 2021

Abstract
The solution of a semi-linear dynamic system, which is the mathematical model of plane-parallel ship motion, is obtained using the perturbation method. It is shown that solution of linear dynamical systems depends on both harmonic functions and integral sine and cosine functions. The perturbation method is used to solve the plane-parallel motion of a ship from nonlinear equations that take into account the influence of static moment. The effect of this value on each of the velocity components is shown. The influence of the linear velocity component on the angular velocity is shown.. The resulting solutions can be used to automate the movement of a vessel along a constrained fairway using an automatic control system.
Evolution of Hydrocarbon Systems in the Tersk-Caspian Trough
Authors: Mustaev R N , Kerimov V Yu , Ismailov J J 
Published: March 2021

Abstract
The article analyzes the evolution of hydrocarbon systems in the Tersk-Caspian trough. In general, the modeling results confirmed the existing distribution of oil and gas content across the sedimentary cover of the region. Thus, according to modeling data, confirmed hydrocarbon deposits are located in reservoirs of upper Cretaceous chemogenic limestones in the areas: Andreevsk, Starogroznensk, Khayan-Kort, Pravoberezhsk, etc. The degree of reservoir saturation, excluding field development, is high – up to 80-90%. Subsalt bundles of the upper Jurassic may become promising objects for searching for hydrocarbons. According to the results of geological and geochemical modeling, there are significant volumes of hydrocarbons in the advanced anticline folds in the upper Jurassic subsalt deposits. The oil saturation here can reach 80% or more
Efficiency of Energy Supply in the North-Eastern Regions of the Republic of Sakha (Yakutia)
Authors: Elyakova I D , Elyakov A L , Pakhomov A A 
Published: March 2021

Abstract
In this paper a comparative assessment of the efficiency of electrical and thermal energy production and consumption in a particular region of the Arctic areas of the Republic of Sakha (Yakutia) is presented. Based on the analysis, the existing threats of power supply are revealed and recommendations for effective power supply of the Ust-Maysky District in the Eastern economic zone (EEZ) of the Republic of Sakha (Yakutia) are given. The relevance of the study stems from the fact that the analysis of cost and not only natural indices of electrical and thermal energy production and consumption has been carried out for the first time and no relevant studies have been conducted in the Republic of Sakha in recent years, especially in the context of each locality and the main groups of consumers. The study allows us to propose recommendations for efficient electricity consumption in the context of the settlements of the Ust-Maysky District of the Eastern economic zone of the Republic of Sakha (Yakutia).
Method for Calculating the Cutting Coefficient of Rocks
Authors: Pershin G D , Kosarev L V , Karaulov N G 
Published: March 2021

Abstract
Research objective is improvement of engineering methods for calculating the main indicators and parameters of the process of cutting rocks with a carbide tool. The sawing coefficient is defined as the ratio of the total forces that arise during the cutting of rocks with a carbide tool. Numerical estimation of the coefficient is conducted using two methods, both on the basis of experimental data from previous studies, and according to the developed analytical theory for calculating the system of contact forces, which characterize the resistance of the rock material to shear and compression deformations. Energy-power assessment of the process of separation of the surface layer of rock with cutting tool is reduced to determination the system of contact forces, which on the one hand characterize the resistance of the rock material to compression and shear deformations (reactive forces), and on the other - acting from the cutter to the rock active forces. The conducted research makes it possible to calculate the effective power spent on the cutting process, as well as to determine the share of energy that goes to the destruction of rock, tools and heat generation as a result of mutual friction. These results will be in demand by production companies engaged in the extraction, processing of facing stone and also design of stone-cutting equipment.
Application of Digital Learning in the Vehicle Operator Training System
Authors: Ageev E V , Vinogradov E S , Novikov A N 
Published: March 2021

Abstract
This article describes an improved system for training vehicle operators, and identifies factors that affect road safety in the conditions of the road network. The author’s version of the system for training vehicle operators, when studying the section "Fundamentals of traffic safety" through the use of digital training, which allows you to manage the process of mastering theoretical and practical material. The methods used to improve the reliability of vehicle operators, taking into account individual personal qualities, are presented. The experience of using digital training in preparation for driving a car in real time is reflected.
Investigations of the Liquid-Jet Gas Pump’s Mixing Throat Lengths for Well Operations and Associated Petroleum Gas Utilization
Authors: Karabaev S D 
Published: March 2021

Abstract
One of the solutions of water-alternating gas injection technology and utilizing of associated petroleum gas enhancement is application of pump-ejector system technology, which uses a liquid-jet gas pump (LJGP) as a water and gas mixer. This paper is devoted to the test bench studies of the LJGP’s performance characteristics with change of the mixing throat’s length at excess pressures of the ejected gas. As a result of the bench studies, it was obtained that the excess pressures of the ejected gas Pin
require a different approach when choosing the optimum length of the LJGP’s mixing throat, as compared to atmospheric pressure. So, it was determined that at Pin from 0.05 to 0.18 MPa, a long mixing chamber should be chosen, and Pin from 0.18 to 0.6 MPa, the optimal length is medium. It was also obtained that with an increase in Pin
, the optimum working range of the mixing throat lengths increases, which makes it possible to select the mixing throat in wider ranges, without losing the efficiency of the LJGP. With the optimal length of the mixing throat, the highest gas injection coefficients were in the range of Pin
= 0.2 – 0.5 MPa.
Change in the Soil Complex on Fallow Arable Land of the Boreal Zone of North-West Russia
Authors: Danilov D A , Vayman A A , Yanush S Y 
Published: March 2021

Abstract
Changes in the agrochemical state of old arable soils on two-membered sediments under the formed mature stands of pine and spruce in the Leningrad region of Russia are considered. It is noted that different pH and organic substances content of soil profile is observed depending on rock composition and granulometric condition of soils. The greatest acidification of all horizons along the soil profile occurs in stands with spruce predominance. At all objects studied the humus content is higher in the horizon of formed forest soil. The largest organic substances stock in the former arable horizon is found in areas dominated by pine. In general, in the investigated sites with spruce and pine stands in the soil complex, the amount of mobile phosphorus (P2O5) decreases as the pH value increases along the genetic horizons. As for mobile forms of potassium (K2O), the dependence of its content reduction on the genetic horizons of the soil in the bottom profile from litter to loamy bedding is observed, where there is some increase in its content. High potassium content in postagrogenous soils under the forest indicates the ability of the soil to keep its level in equilibrium for a long time. The return of the former old arable soils and the native state has not yet happened.
Calculation of the Minimum Required Flow Rates for Water Removal from Flooded Wells under the Conditions of the Yamburgskoye Field
Authors: Mugisho J B , Mirsamiev N A 
Published: March 2021

Abstract
Fluid accumulation is one of the most common occurrences in the gas wells of the Yamburgskoye field, as the field entered a later period of gas well production. Fluid accumulation is not always easy to predict and recognize because a thorough diagnostic analysis of the well data is required, but accurate prediction of the problem is vital for timely action to be taken. Three methods are considered for determining the minimum required flow rates for the removal of water from flooded wells under the Yamburgsky conditions.
Influence of Climate Change and Anthropogenic Impacts on Worldview of Indigenous Northern Nations (as Exemplified by the Verkhoyansk District)
Authors: Vasil’eva G S , Starostin V P 
Published: March 2021

Abstract
This article examines global climate changes occurring in the Arctic region of Yakutia through the consciousness of the indigenous peoples of the North as expressed in their mythology. It turned out that the small numbered people native to this territory for hundreds of years preserved and continue mythologizing the changes they see in the surroundings while adapting to them and interpreting them according to the folk wisdom, mythological images, and ethnic moral standards. While the global changes have been scientifically rationalized, the locals do not see these changes as disastrous, which allows them to go on surviving in extreme climate conditions, even though adverse natural, industrial and anthropogenic impacts on their lifestyles, health, and moral standards should not be underestimated. Besides, the authors focus on the correlations between the meteorological factors and the disease rate among the local populace. The dispersion analysis methods were used and explained to illustrate this causal link. The authors pioneer in combining and comparing modern scientific knowledge of the life of the northerners, the impact of various adverse factors on their lives, and the folklore of the indigenous Northern peoples. This research used general theoretical and empirical methods, and to some extent, specialized methods including cross-subject methods to analyze the complex environmental, economic, and spiritual processes and phenomena in the lives of the indigenous peoples in the Arctic region of Yakutia.
Feed Additives with the Inclusion of Co and Mn Change Their Bioavailability and Digestibility of Substances in Bull Calves
Authors: Nurzhanov B S , Duskaev G K 
Published: March 2021

Abstract
In accordance with the scheme of the experiment animals in the control group received the basic diet (BD), Experimental Group I–BD + feed additive, replacing 30% of the concentrated part of the ration with the inclusion of salts of sulfates of cobalt and manganese, Group II – BD + feed additive, replacing 30% of the concentrated part of the ration with the inclusion of nano - and microparticles of cobalt and manganese.
In situ studies found that the dry matter digestibility of feed additives containing chemically pure metal particles of cobalt and manganese and inactivated feed yeast was 15.4-20.0% (P<0.05) lower than in additives with wheat bran. However, when simulating rennet digestion (in vitro), it was found that the dry matter digestibility of feed additives containing chemically pure metal particles of cobalt and manganese and inactivated feed yeast increased by 1.5-2.2% in relation to additives containing wheat bran. Comparing the availability of pure manganese, we note that in the mixture with feed yeast, it was higher than with bran by more than 2.6 times. Similar values were observed for its inorganic form.
The Study of Air Pollution with Coal Dust in Nakhodka City and Posyet Settlement (Primorsky Krai, Russian Federation)
Authors: Kirichenko K Yu , Kholodov A S , Vakhniuk I A , Tretyakova M O , Chernyshev V V , Moskovaya I V , Artemenko A F , Ilyashchenko D P , Petukhov V I , Agoshkov A I , Golokhvast K S 
Published: March 2021

Abstract
In recent years, the export volumes of Russian coal to the Asia-Pacific countries have been continuously growing. Coal dust is among of the strongest air pollutants. The article describes the study of airborne particulate matter in large transport hubs of the Primorsky Krai (Russian Far East): Nakhodka city and Posyet urban-type settlement using the method of measuring the mass and quantitative concentrations of particulate matter. It is shown that the air of these areas is polluted with particulate matter with diameter below 10 microns (PM10). The absolute dominance of 0.3 μm and 0.5 μm particles was revealed in the air of both areas. According to the Russian hygienic standard, the maximum permissible concentrations of PM were exceeded only at several sampling points. However, when compared to some international standards, the content of PM exceeded maximum permissible values at 42% of sampling points in Nakhodka city and at 43% of sampling points in Posyet settlement. It is advisable to install systems for continuous environmental monitoring of air pollution with coal dust particles near coal terminals.
Modeling of Ice Impacts Using Cohesive Element Method: Influence of Element Size
Authors: Makarov O A , Bekker A T 
Published: March 2021

Abstract
The use of numerical methods is a promising way to solve the problem of assessing ice impacts on structures. Among such methods the finite element method is the most prevalent. In its framework the cohesive element method was used in last years for modeling the destruction of ice and good results were obtained. However, a more thorough study of this approach is required. This article is part of numerical experiments performed to study the cohesive element method for solving ice problems. In this paper, the effect of element size on the result is studied. The principles of creating a numerical model are described and several conclusions and recommendations are made on the discretization of the model into finite elements of various sizes.
Assessment of Environmental Changes of Valley of the Undytkan River in Impact Zone of the Elginsky Coal Complex and the Railway Track “Ulak- Elga” with Use of Ground and Remote Methods
Authors: Pinigin D D , Nikolaeva N A , Nogovitsyn D D 
Published: March 2021

AbstractEnvironmental monitoring studies are of primary importance to assess the characteristics of anthropogenic changes in the environment on the territory of the Elginsky coking coal deposit, which is one of the largest resource potential of the Republic of Sakha (Yakutia). Due to the inaccessibility and territorial remoteness of the field, remote research methods are a valuable tool for environmental monitoring. The article shows the experience of using the satellite image analysis method for assessing anthropogenic impact and spatial detection of changes in the components of the natural environment in conjunction with field study. On the territory of the Elginsky deposit there is a complex of production, infrastructure and linear structures: coal mine, processing plant, hydraulic structures, shift camp, power transmission lines, roads and railways, as well as a railroad bridge under construction. Technical structures interact with the components of the natural environment and modify them, forming geotechnical (geotechnical) systems. Two geotechnical systems were considered in the article: (a) ‘Elginsky coal mining complex - natural environment’ and (b) ‘River – Bridge’ on the Undytkan River, formed as a result of interaction of the valley of the Undytkan River and a complex of linear road structures of railway track “Ulak – Elga”. And the analysis of high-resolution satellite images, as well as data from expeditionary ground-based studies, made it possible to establish that the formation and functioning of the transport geotechnical system led to a change in a number of components of the natural environment — mesorelief, hydrological parameters of surface waters, inhibition of vegetation cover, and changes in soils associated with increased water level, as well as with icing processes.
Analysis of the Knowledge Intensity of the Invested Capital of the Baikal Region
Authors: Filatov E A 
Published: March 2021

Abstract
During the rapid flow of events of the XX century, there were structural changes in the world economy, which provided all the observed scientific and technological progress. High-tech industries have become the main factor in the development of world scientific and technological progress. In the second half of the XX century, a special category of technologies, industries and products was formed, which were called «science-intensive» or «high-tech». Before the next global financial crisis, it is most important to study the impact of the level of knowledge intensity of invested capital on economic efficiency. The article deals with the analysis of the knowledge intensity of invested capital. Knowledge intensity is an important parameter for determining the efficiency of the economy. The author introduced into scientific circulation indicators: knowledge intensity of invested capital, science intensity of gross regional product and investment return of gross regional product. The article reveals the influence of factors influencing the change in the knowledge intensity of the invested capital of the Irkutsk region of the Russian Federation and gives the author’s methodological approaches to its calculation (the author’s methods of factor analysis). The article presents the author’s analytical, systematic statistical material for the analysis of key indicators revealing the impact on the change in the knowledge intensity of the invested capital of the Baikal region of the Russian Federation (Irkutsk region, Republic of Buryatia, Zabaikalsky Krai). The paper is produced in the framework of the scientific project of the Siberian branch of the Russian Academy of Sciences No. XI.174.1.4 «Activation of the internal development potential of regions of the resource specialization (on the example of the Baikal region)».
Development of Sea Ports in the Far East of Russia: Economic Aspect
Authors: Gudkova E V , Zaostrovskikh E A 
Published: March 2021

Abstract
In the work, within the framework of a new model for the development of the Russian Far East, the trends in the development of seaports for the period from 2000-2019 are studied. In this vein, a theoretical and methodological platform has been studied, which is used in the analysis of the relationship between the port and the region’s economy, and an assessment of the economic effects for the region from the implementation of large projects in the medium term has been carried out. A quantitative analysis of the interdependencies between the specialization of the port and the regional economy was used. It has been established that the implementation of these projects in the medium term will not have a significant impact on the port region: the economic effects will gradually decrease, and the negative consequences will increase. Leveling transport costs through tax incentives of the Free Port of Vladivostok, on the one hand, will create competitive advantages for Russian cargo in the international market, and on the other hand, will stimulate a negative impact on port regions. The economic activity of the ports will not cause a chain reaction of industrial production growth in the port region. Consequently, ports can act exclusively as ports that affect the economy of the port region only through an increase in the volume of their work. For this reason, the priority issue in the development of coal ports in the medium term is the creation of modern specialized terminals with reliable environmental protection, which would combine social, economic and environmental values.
Potential Growth of Added Value in the Conditions of Technical and Technological Renewal of the Region’s Industries
Authors: Belyakova G Ya , Mikhailova S V , Latynina A V 
Published: March 2021

Abstract
The central problem of long-term economic growth according to increase in gross added value of the region are changes in technologies and structure of economy of production systems of territories. Effective use of the available resources and their reorientation to create new types of products, competitive in national and global markets, is possible only in the conditions of technical process and innovative development. Technical and technology updating is considered by authors in terms of potential of the available resources accumulated gross added value, with their subsequent transformation into capital-labor ratio and labor productivity. At the same time, gross added value appears in two aspects: as investment potential of development and as financial result of activity of all economic system of the region. As an object of research Krasnoyarsk Region consisting of 6 macro districts and 61 territories is provided. An object of research were processes of technical and technology updating of production systems of territories with an exit to the metrics estimating quality and efficiency of transformation. Their indicative form allows to position territories and macro districts on use of the available resources. In general, the research has analytical character and directed to development of regional policy on increase in technological effectiveness of structure of the economy giving it big stability in the conditions of the changing markets.
Economic Growth of the Region’s Territories: Comparative Analysis of the Productivity of the Manufacturing Sector
Authors: Filimonenko I V , Likhachev M A , Borodkina V V 
Published: March 2021

Abstract
Labor productivity is one of the main indicators of the effectiveness of the use of resources of territories, determining the level of its economic development. The purpose of the study is to analyze the existing potential for increasing labor productivity in the manufacturing sector of the territories of one of the macro-regions of the region. The comparison is made in terms of absolute and relative values of labor productivity and factors that determine the indicator: capital-labor ratio, average headcount, employed workers, gross added value. The relationship between labor productivity and capital productivity was confirmed, the power of influence was established in the context of the territories of the macro district. The results obtained make it possible to identify differences in the levels of labor productivity and its determining factors in general and manufacturing industries, to make a rating of territories by the values of indicators, to assess the potential for their growth and development. The results of the study are aimed at finding resources for the growth of labor productivity in the region’s space while increasing the importance of the manufacturing sector of the economy as a carrier of scientific and technological progress.