bluuebunny/crossref_metadata_2025_split huggingface dataset:
Surface Electromagnetic Wave-Based Wireless Communication System for Mines
Authors: Nikolaev A V , Babenko A G , Lapin S E , Fedosov D V , Erofeev M N 
Published: April 2021

Abstract
The paper discusses the advantages and shortcomings of resonance and single-frequency single-wire induction communication systems for mines. The issues of creating a magnetic induction communication system based on the twin transmission line (the MIKON-Tel queuing system) and the prospects for using small antennas to arrange two-way communication channels through the rock have been considered. The possibility of creating a multichannel queuing system for subscribers, which operates in a wide frequency band using a twin induction transmission line and small ferrite resonator antennas, is shown. The antenna designs used for magnetic induction communication in mines have been considered. High level of radio frequency signals has experimentally been proven when using a twin line and small antennas. The specific signal attenuation along the route in the coal mine was 4 dB/km. The results obtained prove the fundamental possibility of designing multichannel induction communication systems with a guaranteed communication range of over 4 km from the base station.
Studies on the Sorption Mechanism of Removing Nickel Ions from Model Waters by Cereal Grain Husks
Authors: Stepanova S , Alekseeva A , Khafizova L 
Published: April 2021

Abstract
The study discusses the possibility of using cereals husks (barley, wheat and oats) as a sorption material for removing Ni2+ ions from model waters. The article shows that the adsorption capacity at initial concentration of Ni2+ ions of 17 mmol/dm3 reaches 1.1 mmol/g, and at concentration of 68 mmol/dm3 reaches 1.4 mmol/g. The built isotherms of Ni2+ ions adsorption by cereal husks from model waters at a large correlation coefficient are described using the Langmuir model, but the same is observed (within the range from 0.83 to 0.98) in the Freundlich and Temkin models, which can also indicate multilayer sorption and intermolecular linear interaction between adsorbate molecules.
The Analysis of Spatial Propagation of the Key Degradation Processes in the Farmlands of Samarskaya Oblast
Authors: Samohvalov E V , Zudilin S N 
Published: April 2021

Abstract
This work deals with the spatial analysis of farmland degradation in Samarskaya Oblast. The degree of degradation was evaluated pro rata with the yield shortfall caused by the environmental condition of the lands and the diminishing of their fertility. We classified the lands by their degradation levels, zoned them across administrative districts, and assessed the fertility fall coefficient. We proved the feasibility of differentiating approaches to the recovery of land fertility and soil protection.
To the Question of Disposal and Recycling Carbon Dioxide
Authors: Neverov E N , Korotkiy I A , Korotkih P S , Skhaplok R U , Prib I A 
Published: April 2021

Abstract
In the modern world, the issue of reducing carbon dioxide emissions has become relevant, this is confirmed by the conditions of climate change, macroeconomic instability and depletion of resources. The article discusses methods for solving this problem: The first method is associated with its transformation in the form of solid minerals and industrial use in the form of carbonates. The second way to reduce CO2 emissions is to create a power plant with a capacity of 20 MW, but this method increases the cost of electricity. The third method is based on the principle of air filtration. The essence of this method is to generate heat energy and collect carbon dioxide from the air. In addition to such processing methods, a number of others are being implemented by industry. So far, two main approaches have been used, where CO2 is reduced in gaseous form, or reduced in a liquid medium. From all of the above, the following conclusions can be drawn that the utilization of carbon dioxide is a complex project, both financially and technically, but technical progress does not stand still, but develops in full swing, there are solutions that are partially implemented and only await mass production.
The Impact of Town-Forming Companies on the Urban Development of Monotowns, the Case of the Perm Region
Authors: Bushmakova Iu V , Maksimova S V 
Published: April 2021

Abstract
This article presents the results of the retrospective study of city planning policies in the monotowns of the Perm region. We studied the transformation of the industrial tows in the Perm region from the pre-revolutionary period up to the current times based on the archive and cartographic data, the study of city planning documents, and field research. The monotowns in the Perm region have the typical features of soviet city planning, which did not consider terrain as a factor of people’s well-being. It was only assessed from the point of view of the convenient location of plants. This led to the current problems, including the deterioration of the urban environment and the partial de-urbanization of the territories. We found out that the existing general layouts do not take into account the changes in the impact of the town-forming companies on the urban environment and generally do not satisfy the existing demands.
Combined Action of Sodium Dodecyl Sulfate, Tween-85 and Oil on Duckweed (Lemna Minor)
Authors: Saksonov M N , Kupchinsky A B , Stom D I 
Published: April 2021

Abstract
Surfactants (surfactants) are found in large quantities in industrial and domestic wastewater. Along with them, there are also oil products. In a certain concentration, they have a depressing effect on aquatic organisms. In recent decades, along with physicochemical methods for assessing the quality of water bodies, biodiagnostics - biotesting and bioindication - has been actively used. Depending on a number of factors, the effect of the combined action of substances on the test organism can be additive, antagonistic, or synergistic. Biotesting in combination with a multifactorial experiment makes it possible to identify the final effect and the nature of the combined toxic effect of pollutants. The study investigated the isolated and combined effect of oil and some surfactants on the duckweed. The criterion for the influence of pollutants was the growth dynamics of fronds of this aquatic plant. During biotesting, the most widely used anionic detergent, sodium dodecyl sulfate (SDS), was used. In addition, we studied the effect of the nonionic surfactant Tween-85 on this test object. The toxicity of the effect of certain substances on the duckweed was assessed, and this made it possible to calculate the concentrations that cause a certain toxic effect. Then a full two-factor experiment was carried out with the combined action of two pairs of substances: oil - SDS, oil - Tween-85. Regression equations for two pairs of substances are compiled. The action of the investigated compounds is interdependent. The nature of the combined toxic effect turned out to be less than additive.
Analysis of the Use of the First Large-Volume Hydraulic Fracturing with Injection of Over 100 Tons Propping Agent at the Russian Fields
Authors: Sarancha A V , Inyakina E I 
Published: April 2021

Abstract
Hydraulic fracturing (HFT) is a technological process aimed at the productivity increasing of oil and gas wells by creating a highly permeable fracture diverging in diversely directions from the well or multiple fractures, which in turn will be filled with granular material – propping agent. For more than 25 years, hydraulic fracturing has been widely used in Western Siberia, as a very effective means of intensifying the fluid flow to the downhole of production wells. Analyzing the experience of oil fields development in the Khanty-Mansi Autonomous Okrug, where over 25 thousand treatments have already been carried out hydraulic fracturing technology has proved to be the most effective and has gained the greatest distribution among the other geological and technical operations. This paper will provide for analysis of the first large-volume hydraulic fracturing with injection of over 100 tons of propping agent in Russia, which was carried out at four wells at the Yaraynerskoye field.
Identifying of Production Facilities (Reservoirs) at Multilayer Oil and Gas Condensate Fields in the Yamal-Nenets Autonomous Okrug
Authors: Sarancha A V , Mansurova M M , Semenenko A F 
Published: April 2021

Abstract
The accumulated experience in the development of the multilayer oil and gas fields is sometimes evidenced by the inaccuracy of decisions in the area of identifying the production facilities used at the initial stages of development, when the amount of initial information necessary for design is very limited. A high degree of knowledge is typical for the drilled fields, when decisions regarding the identifying of production facilities are already taken and only their correction is possible. At the initial stages, the practice of combining a significant number of reservoirs into a single production facility has been often applied, which has led to the insufficiently complete production of the individual productive intervals, reducing the efficiency of the hydrocarbon extraction from the subsoil of the Earth. The paper presents a scheme for the identifying of the production facilities at the multilayer Yuzhno-Russkoye and Beregovoye oil and gas condensate fields, which consists of a stepwise analysis of each of the criteria for the possibility of combining the reservoirs into a single development facility presented in the paper. Decisions on the identifying of the production facilities according to the proposed algorithm were tested and entered into the feasibility study of the oil recovery factors at the mentioned fields. The proposed solutions make it possible not only to achieve high hydrocarbon extraction rates, but also to avoid a decrease in the economic efficiency in the late stages of the field development, caused by the need to drill an additional well stock when disconnecting the erroneously combined reservoirs at the initial stage.
Calculation of Reservoir Characteristics by the Pressure Curve at the Inflow Using Reference Curves
Authors: Levitina E E 
Published: April 2021

Abstract
In this paper, we propose a method for calculating the filtration characteristics of the reservoir by the inflow curve obtained when the well was put into operation after creating a sharp discontinuity in the reservoir pressure drawdown. The need to improve the accuracy of determining the reservoir characteristics according to flowing tests is an urgent topic for many oil companies. The developed methodology for calculating the reservoir characteristics according to the data of the reference inflow curves differs from the well-known methods of processing the inflow curves and also determines the reservoir porosity in addition to its permeability.
Ecological and Epidemiological State of Cancer Incidence in the Chechen Republic
Authors: Abumuslimov A A , Aishanov S S , Agmerzaev A A 
Published: April 2021

Abstract
The article presents statistical indicators based on the materials of The Department of the Federal service for supervision of consumer rights protection and human welfare in the Chechen Republic. The analysis of the geographical distribution of cancer incidence in the Chechen Republic was carried out. Various features of the impact on human health are considered.
Determination of the State of Rock Mass by the Mathematical Modeling Method
Authors: Gorbunova N , Mirkushov O 
Published: April 2021

Abstract
The article discusses a method for finding the intensity of fracturing of a rock mass by mathematical modeling. To determine the frequency of fracturing, the unit circle direction segment method will be used, and for the concept of extrema, a diagram of fracture frequency in directions is constructed, which is divided into sectors by the directions of the fracture systems. When studying the intensity of fracturing for a rock mass of a section of the “Pshada-Bettinskoe [[CHECK_DOUBLEQUOT_ENT]] interfluve, a graph was constructed that is divided into sectors by the directions of the fracture systems. It was established that the intensity minima are at the boundaries of the sectors and are Lmin = 0.13, and the maxima are inside the sectors in the directions of the sums of vectors Lmax = 1.87 describing crack systems. As a result of the work, it was found that the rock mass of the section of the “Pshada-Bettinskoe” interfluve can be attributed to the third category of fracturing - medium-fractured (large-block massif). This model of fracturing of the rock mass will allow us to effectively solve the problems of rock mechanics.
The Influence of Size Effect on Strength and Deformation Characteristics of Different Types of Rock Samples
Authors: Usol’tseva O M , Tsoi P A 
Published: April 2021

Abstract
This paper presents the results of the experimental study of the influence of sizes effect on the strength and deformation characteristics of samples of hornfels, limestone, sandstone, siltstone and ore-bearing rocks. Tests were performed on cylindrical samples of three sizes of diameters - 10, 30 and 60 mm under uniaxial compression and tension loading. The results of the study demonstrated that the values of ultimate strength decrease when the size of samples increases for the samples of cornea, limestone, sandstone and siltstone. The ultimate strength increases with increasing of sample size for ore-bearing rocks containing viscous inclusions. The samples of smaller size of ore-bearing rocks exhibit a brittle character of the fracture for all types of rocks, and the viscosity of fracture increases with increasing size of samples. the obtained regularities were analysed from the positions of otwo types of size effect (volume and surface).
Study of the Influence of Indicator Factors on a Complex Index of the Region’s Innovation Potential Using Correlation and Regression Analysis
Authors: Sazonova A S , Kuzmenko A A , Filippova L B , Filippov R A 
Published: April 2021

Abstract
A special feature of Russia’s innovative development is the high degree of regional development disparity. This is due to a number of factors: specific nature of each region, historically established leading industries and geographical location. The innovative potential of a country is a combination of innovative potential of regions, and the importance of considering and studying the issues of evaluating and analyzing this index is more relevant today like never before. The innovation potential of a region is a whole complex of resources and organizational capabilities of the region aimed at providing its innovative development, ensuring an innovation continuum. In this review, the innovation potential is represented as an integrated quantity that includes a system of indicator factors. Within the framework of this studies, the analysis of the influence of individual indicator factors on the complex index of the region’s innovation potential is of particular interest. Since the relationship between indicators is incomplete and often probabilistic, there are good reasons for using correlation and regression analysis as a research method.
Designing Power Supply Systems with Account to the Entire Life Cycle of the Gas Field as Exemplified by the Existing Fields in Western Siberia
Authors: Bogachkov I M 
Published: April 2021

Abstract
This article deals with designing a power supply system that would take into account all life cycle periods of a gas field. The goal of the research is to study the process flows of the existing gas fields in Western Siberia to improve their power supply systems taking into account their entire life cycles. To achieve this goal, we strove to determine the key technology used to prolong the profitable gas extraction in the third life cycle period, the process flows of Western Siberia gas fields during various life cycle periods, as well as the duration of each of the development periods at the existing gas fields in Western Siberia and the duration of the entire gas field life cycle, and determined the electrical load for each of the life cycle periods. The research problems were solved using the theoretical experiment methods (analysis and synthesis), and the empirical methods (metering, comparison). The results of the research show that the yearly average electrical load of a gas field significantly increases over its life cycle.
Isolation Experiments and Their Role in Risk Mitigation During Pandemics
Authors: Kamaletdinova G R , Sorokin A E 
Published: April 2021

Abstract
The human is the most important element of the ecosystem. Due to the fact that the technosphere depends on the human life, the priority is to save the human health and to provide high performance even in stressful situations as it helps to mitigate risks when critical situations arise including at industries. In order to study the human behaviour under stress in more details, we suggest putting humans into the artificial ecosystem where the human is the key element. At this, the decomposition of such complex system is the external environment, the life support system arranges by technical means and the human acts as a loading element. Such approach should be applied to control the condition of the environment surrounding the human and to be able to model various scripts of the environmental effect on humans and vice versa. Such study has shown that human performance and general condition are affected by tiredness, the time spend in isolation, frequency of critical situations. The global situation in 2019-2020 and self-isolation during the pandemics allow expanding this study and evaluating the effect of isolation on the technosphere safety. The result of this work is the well-developed comprehensive human-machine system within which the study is carried out. Recommendations obtained during the calculation experiments are compared with the natural data. On these grounds, conclusions are drawn that allow one to mitigate risks under conditions of isolation.
Anovar of Errors in Surveying Photogrammetric Measurements of Mountain Objects with the Help of Unmanned Aerial Vehicles
Authors: Blischenko A A , Gusev V N 
Published: April 2021

Abstract
The application of unmanned aerial vehicle technologies in surveying is gaining pace: the results are more correct while being obtained more quickly at less amount of resources required. The drawbacks of the UAV used are most frequently detected during the flight execution and thus, a certain experience is accumulated, new methods and options for the UAV application at surface mining operations. A great part of the experimental outcomes obtained allows justifying a more efficient use of UAV from a theoretical perspective. The article considers the main problems of surveying photogrammetric measurements of the mountain objects. The authors study the impact factors influencing the errors in the measurements conducted with the help of the unmanned aerial vehicle and suggest a mathematical method for their substantiation and analysis by the example of ANOVAR of the UAV flying height and the number of control survey points that help to improve the correctness of the final model for the object measured.
Research of the Mathematical Model of Heated Greenhouses
Authors: Kokieva G E , Voinash S A , Sluchevsky A M , Yu Maksimovich K 
Published: April 2021

Abstract
Large-scale greenhouse production is currently developing along the path of introducing technologies for intensive cultivation of vegetable crops and using automated control systems for technological processes based on micro and minicomputers. One of important technological processes is watering and feeding plants with mineral fertilizers. The need to automate this process is associated with laboriousness of process of preparing solutions, accurately maintaining given concentration of substances in them, timely supply and uniform dosing over the entire area of greenhouse under various disturbances of external environment. The article shows a technological scheme of a heated greenhouse of the simplest design. A method for constructing balance models is presented; model can be transformed for more complex schemes. Three main models in spacestate (continuous, discrete, operator) are considered. Information about processes is recorded discretely, therefore, we first identify discrete form of the model, then we obtain parameters of the discrete form. Further, using equation of constraints, a matrix of discrete and continuous forms, we obtain transfer functions for the internal airtemperature. Due to simplicity of setting parameters, it can be easily reproduced for many different designs and systems of greenhouse complexes, as well as for various scenarios of changing environmental conditions. Proposed balanced dynamic models allow the most complete use of computers for studying heat consumption modes of heated greenhouses, as well as for synthesis of temperature controllers. In this case, vector-matrix algebra is used as a mathematical apparatus, standard programs for which are widely used on computers for various purposes.
Improving the Efficiency of Foam Separation of Diamond-Bearing Raw Materials by Using a Combined Collector Based on the Naval Fuel Oil and Activated Oil-Water Emulsions
Authors: Dvoichenkova G P , Morozov V V , Verkhoturova V A 
Published: April 2021

Abstract
As a result of the completed studies, a solution was provided for the urgent issue of increasing the efficiency of foam separation of diamond-bearing kimberlites through the use of a combined collector based on an activated water-oil emulsion and the naval fuel oil F-5. With the selected ratio of components under the conditions of experimental tests, an increase in the extraction of diamonds into concentrate by an average of 5% was ensured, with a decrease in the consumption of the collector reagent by 1.5-2 times and the foaming agent OPSB by 15-34%.
Prospects of Development and Design Features of Toll Roads in the Russian Far East
Authors: Kamenchukov A V , Kondratenko T E , Voinash S A , Sokolova V A , Alekseeva S V , Taraban M V 
Published: April 2021

Abstract
The article considers the issues of the efficiency of location and operation of toll points on highways and provides the assessment of the development of the network of highways in the Far East with the prospects for the organization of toll city bypasses. The calculation of the efficiency of the toll point was carried out based on the example of the highway «Eastern bypass of Khabarovsk».