bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation and Calculation of Pump-Ejector System Parameters at SWAG in Conditions of Megion Oil Field
Authors: Volkov V D , Ludupov V B 
Published: April 2021

Abstract
The average oil recovery rate (ORR) in Russia is 0.3, which means that the achieved amount of extracted oil is 30% of the geological (lying in the formation). Due to the irrational selection of the enhanced oil recovery method this problem is quite common. There is the trend of growing demand for petroleum products each year, it is necessary to increase the volume and pace of production. Due to the low ORR in Russia, it is necessary to search for new methods that can significantly increase the amount of extracted oil, as well as the productivity of wells and oilfields. The use of pump-ejector systems and injection of water-gas mixture into the reservoir is an excellent solution of this problem. The optimal pump-ejector parameters equipment providing SWAG injection on the formation in conditions of the Megion oil field were calculated in this work.
Prospects for the Assessment of Phytoplankton Biomass in the Black Sea (on the Example of the Karkinitsky Bay) using Earth Remote Sensing
Authors: Kabanov S S , Kapralova D O , Shushpanova D V 
Published: April 2021

Abstract
The aim of the study is to assess the dynamics of phytoplankton biomass in the Karkinitsky Bay of the Black Sea, as well as the annual trend of its abundance based on satellite information. The article briefly describes the methodological steps for study the dynamics of phytoplankton biomass from satellite images, indicates the possible reasons for the formation of the eutrophication process in the Karkinitsky Bay, identifies and describes the optical categories of phytoplankton depending on its concentration, the reasons for the seasonal shift in the biomass of phytoplankton in comparison with other parts of the Black Sea by period from 19.02.2019 to 11.04.2020. The study allows to assess the possibilities of using the NDCI index for assessing the biomass of phytoplankton and make the conclusions on the process of eutrophication using the example of the Karkinitsky Bay. The scientific novelty of the work is the use of the NDCI index to study the dynamics of phytoplankton biomass in the Black Sea. As a result, several maxima and minima of phytoplankton biomass accumulation during the year (from 2019 to 2020) were identified and possible reasons for the observed results were described, the main of which can be considered a high anthropogenic load on the studied part of the Black Sea.
Analysis of Sources of Anthropogenic Pollution of the Transboundary River, the Serevsky Donets, Based on the Dynamics of the Anion Composition (Nitrites, Nitrates, Sulfates, Chlorides, Phosphates) in 2007-2016
Authors: Vorobiev E V , Usova E V , Orkhova Yu V 
Published: April 2021

Abstract
The goal of this work is to analyze the long-term dynamics of the content of nitrites, nitrates, sulfates, chlorides and phosphates in the transboundary river Seversky Donets. Material and methods. Regular sampling at three points over 10 years (from 2007 to 2016) was used for this research. Monthly average ions concentration in MPC fractions was analysed. Results. Regularities in the dynamics of the anionic composition, caused by both natural and anthropogenic factors, are revealed. It was discovered that the main sources of phosphates and nitrites are located in the Belgorod region, while sulfate and chloride pollution happens mainly on the territory of Ukraine as a result of the discharge of mine waters by coal industry enterprises. The nitrates concentration has similar quantitative values and dynamics at all considered sampling points, which is determined by the natural mechanisms of nitrogen transformation in warm and cold periods. Also, the comparison of specific combinatorial indices of water pollution (SCIWP) at the considered sampling points for the considered period is carried out. Conclusion. In order to improve the ecological situation, it is recommended to conduct regular sampling and observation, including at a larger number of sampling points, as well as data exchange with the Ukranian environmental services.
Application of Methods of Increasing Oil Extraction Coefficients and Intensification of Oil Production at the Fields of Yamalo-Nenets Autonomous Area
Authors: Sarancha A V , Lizunova E D , Baranova E V 
Published: April 2021

Abstract
The methods of impact on productive oil-saturated formations are intended to increase well productivity and increase oil recovery. In order to complete oil recovery from the formation, a coordinated application of methods of increasing oil recovery and intensification of production is required. Method of impact on formation is selected taking into account features of geological structure, filtration - capacities properties, composition of formation rocks and fluids that saturate them. This article considers various promising methods of increasing oil recovery and intensification used at the fields of Yamalo-Nenets Autonomous Area of the Tyumen region.
Present Day Developments on the Labor Market of the Russian Federation and Peculiarities of Its Competitive Environment
Authors: Shapovalova I M , Kopacheva Ye I 
Published: April 2021

Abstract
The study presents the analysis of the modern day labor market of the Russian Federation from the point of view of the major challenges. The researchers focus on the regulation tools of the labor market and classification of the impact factors that affect the performance of the market and its regulation as well as competitiveness of the human resources, including the employees of a separate enterprise. Along with the methodology of the labor market regulation, much attention is paid to the elaboration of the index system which reflects the level of labor market development and effectiveness of its regulation and can be subject to statistical analysis, which, therefore, allows to evaluate the condition, tendencies and peculiarities of the labor market and define trajectories in its regulation. The impact factors targeting improvement of the competitiveness of the employees make a pattern comprised of the elaborated steps aiming for the efficient human resources management and business management.
Applying of the Best Available Techniques in the Municipal Solid Waste Recycling
Authors: Zabelina A V , Sergienko O I 
Published: April 2021

Abstract
The article considers the experience of restructuring the activities of a municipal solid waste landfill into an enterprise for integrated waste recycling, taking into account the principles of circular economy. The introduction of the best available techniques for waste management allows to increase the quantity of raw material fractions that can be reused, and also helps to reduce the amount of waste sent to landfill. The results of the study allow to draw conclusions about the economic and environmental feasibility of using the best available techniques in municipal solid waste management. The article considers the activity of the Noviy Svet-ECO LLC in the Leningrad region. The waste management model developed for this company can be used for restructuring existing landfills for solid municipal and industrial waste disposal into more modern and efficient ecological and technological clusters and meets the principles of a circular economy.
Developing and Optimizing a Model for Creating a Learning Chatbot Using the Example of Technical Support
Authors: Tishchenko A A , Tishchenko P A , Shestakov T A 
Published: April 2021

Abstract
A model for building a chatbot to automate technical support work was developed, the model was optimized and the developed chatbot was tested. This development will help to reduce the load on the existing technical support system and to solve users’ routine tasks without human intervention.
Fire Heating Survey for the Gas-Condensate Field Reservoir
Authors: Mozgova A S 
Published: April 2021

Abstract
The water in potable water storage tanks at the site under investigation is warmed up to 6 - 12 °C with natural gas. The fire heating system of potable water storage tanks is imperfect and implemented with low efficiency. The amount of air needed for natural gas burning is not regulated. The composition of the combustion products was measured in the operating mode of natural gas combustion and with partially limited access to the air required for fuel burning. Air inlet was restricted through covering the furnace opening with a steel sheet. Instrumental surveys were carried out using the DAG-16 gas analyser. The following was subject to instrumental measurements during the survey: composition of exhaust gases; temperature of the air fed for the combustion of natural gas; temperature of the ambient air [1] - [11]. Sampling of the combustion product for analysis were taken at the chimney outlet.
Design of Navigation Satellite Systems in Effective Geomonitoring for Mining
Authors: Prokofeva E N , Vostrikov A V , Nekrasov H A , Redin D E 
Published: April 2021

Abstract
Currently for a mining science it is actively developing branch of knowledge, called “satellite technology”, which has diverse practical applications for geodesy, mine surveying, control systems, mining logistic and transport complex, ensuring the safety and control of the risks there creation of tools and methods of the implementation of energy efficiency strategies. For specialists of mine surveying and geodesy introduction of practice, satellite-positioning methods has become almost revolutionary technological revolution that led to a radical revision of the structure of geodetic support of the country, fundamental changes in the methods field and laboratory work on the earth’s surface. There are examples of current uses of satellite technology over the last decade at the leading companies of the mining sector. The creation of new methods of technical and economic audit determines the need for generation and proof of the most common and objective criteria and evaluation indicators for the design phase and launch of the satellite equipment. To extend the lifetime of spacecraft is pro-posed in the schematic design phase to calculate the possible effects of electrostatic discharges and to give recommendations for reducing their negative influence. Developed a new method that allows for 2-3 orders of magnitude to reduce the complexity of calculation for the pattern of spreading of the currents on the surface of spacecraft from electrostatic discharge. The method is based by the idea of macromodeling. The accuracy of calculations is very high (the inaccuracy does not exceed 1%).
Energy Balances the Process Thermal Decomposition Methane in Cooling Conditions High-Temperature Technological Installations
Authors: Ivanova S V , Neshporenko E G , Kartavtsev S V 
Published: April 2021

Abstract
A mathematical model the energy balances the process thermal decomposition methane under cooling conditions high-temperature installations is proposed. The model under study allows us to evaluate the possibility using regenerative heat use, in order to reduce heat losses through the fence a high-temperature installation by utilizing the heat of the liquid coolant, allowing to increase the productivity the high-temperature process. Natural gas as an energy carrier has a lot advantages and in comparison with other types fuel can be fully used, since it is easy to organize complete combustion with minimal heat loss. It is worth noting that natural gas does not contain ballast and harmful impurities, it also has a high calorific value and high temperatures develop during combustion. All high-temperature installations have the main task ensuring the continuity the process with minimal fuel consumption, using energy from both primary and secondary energy resources (SER). Under pyrolysis conditions, methane is most thermally stable, since thermal degradation methane is thermodynamically possible at temperatures above 560°C. However, when methane reaches significant speeds, it decomposes at temperatures about 900°C, and at temperatures above 1400°C it completely decomposes into carbon and hydrogen. The purpose calculations the mathematical model is to determine the heat transfer coefficient and the temperature field methane heating inside a single tube under specified boundary conditions and thermal parameter the system under consideration. Solving this problem will increase the energy efficiency the high-temperature process. Also, the input the calculations was the analysis of existing apparatus for the pyrolysis methane with liquid coolant for steelmaking, is determined depending on the heat transfer regime gas flow (Re⩽105), the number Nusselt, the amount heat received and given in the decomposition process, the temperature heating natural gas and represented by a graph fraction carbon and hydrogen inlet the thermal decomposition in terms the cooling high-temperature facilities.
Fight against alien (invasive) species of plants, animals and microorganisms in the Russian Federation
Authors: Lisina Natalya , Erin Vasili , Rybashkova Albina 
Published: April 2021

Abstract
The article analyzes the restrictions that are necessary to combat alien species of animals, plants and microorganisms in the Russian Federation. The authors identify regulatory problems and offer solutions. The authors propose to develop a basic document at the national level. This document will be the basis for all government agencies and public organizations in the fight against invasive species of plants, animals and microorganisms. It is also necessary to assign to one state body the functions of combating invasive species throughout the country, to form and constantly update the list of alien (invasive) species of plants, animals and microorganisms on the territory of the Russian Federation.
The lupine significance for forage production: lupin-and-rape concentrate as a source of valuable nutrients for animal feeding
Authors: Gaponov N V , Yagovenko G L 
Published: April 2021

Abstract
The article presents a way to solve the problem of protein and energy-rich diets which seems to be the key task for livestock and agricultural science workers. An important place is given to pulses and oilseed forage crops. They are widely used as green forage, native and chopped seeds and products of their processing (oilcake, meal, oil, etc.) for feeding animals and, to a limited extent, as part of compound feeds. A key issue in feed production is the issue of feed protein. The further development of animal husbandry depends on its decision. As a rule, protein deficiency, in diets is up to 30%, and leads to feeds overspending and increases the cost of livestock production by 1.5-2.0 times. The solution for the fodder protein problem should be carried out mainly due to legumes and their mixtures. One of the main tasks of fodder production is the introduction of advanced preparation technologies. Dry feed mixtures’ structure and form meet the physiological needs of animals most fully because of increased nutrients energy and product quality.
Reproductive functions of cows and heifers of the Aberdeen-Angus Breed according to the calving season
Authors: Usmanova E N , Kuzyakina L I , Pashtetsky V S , Ostapchuk P S , Kuevda T A 
Published: April 2021

Abstract
This paper presents indicators of reproductive functions of cows and heifers of the Aberdeen-Angus breed depending on the calving season in one of the farms of the Central Federal district of Russia. 1.729 calves were received, including calving of cows with twins, or 0.6%. Calves are produced in spring, summer and autumn in 2019. In the summer, the highest number of complex calving (8.0%), abortions and stillbirths (5.8%) was observed. In summer, heifers have more difficulty calving than in spring. Animals calve more easily and with fewer abortions and stillbirths in the autumn months. Quantity of abortions and stillbirths in this period were 0.9%, it is significantly less than the average for the year. Young bulls birth weight did not affect the further increase in live weight until 5 months of age. The live weight of bulls in summer and autumn is higher than those born in spring; it was found (p≤0.001). We recommend to strengthen control over feeding and body condition of cows and heifers with calving summer time and to provide them shelter from the heat. Calving of cows in the spring, autumn, and heifer only in the spring are the most prosperous.
New isolates of soybean nodule bacteria in Central Siberia
Authors: Churakov A A , Khizhnyak S V 
Published: April 2021

Abstract
In a vegetation experiment, the effect of inoculation with new strains of symbiotic nitrogen fixers on the development of soybeans was assessed. The comparison was carried out with the industrial strain 634 b of the All-Russian Research Institute of Agricultural Microbiology and the autochthonous culture discovered in the Krasnoyarsk forest-steppe (Krasnoyarsk Territory). Two soybean samples were used: variety Zaryanitsa (characterized by high nodulation) and line G-23 with low nodulation capacity. Inoculation of five-day-old seedlings was carried out by immersing the roots in an aqueous solution obtained by washing the colonies from a semi-synthetic nutrient medium. The concentration of the microsymbiont is 1 × 107 cells/ml. The plants were planted in 5L pots filled with typical agrochernozem taken from soybean crops. The soil contained an average amount of mobile phosphorus, a high amount of potassium, and a low to medium amount of nitrogen. The count was carried out in the R3 phase of soybean development; for each variant, 16 plants in four vessels were analyzed. Significant differences in plant height, wet and dry weight of stem and root, maximum root length were established. In the G-23 line, the advantage was proven for strains 1–4 relative to the native culture (p < 0.003, 0.012, 0.006, 0.033), industrial drug (p < 0.002, 0.009, 0.004, 0.025), respectively. A significant difference in cultivar Zaryanitsa was obtained between strains 1, 2 and autochthonous culture (p < 0.036, 0.036), preparation 634 b and isolates 2, 3 (p < 0.012, 0.011). The maximum ranks were established for the Zaryanitsa variety for strains 1 (5.14), 2 (4.78), line G-23, strains 4 (5.4) and 3 (5.00). Consequently, new isolates of nodule bacteria are sources of increasing soybean productivity in northern agriculture.
Metabolite-associated enzymatic properties of microorganisms with an antagonistic effect on Aspergillus and Fusarium fungi, pathogenic for crops and farm animals
Authors: Khabirova S R , Idiyatov I I , Shuralev E A , Tremasova A M 
Published: April 2021

Abstract
Mycotoxins are secondary metabolites of toxin-forming fungi. Contamination of agricultural products with mycotoxins can occur both in the field and during storage, if the conditions for the growth and development of fungi. The impact of mycotoxins on human and animal health is manifested in the form of acute mycotoxicosis. In modern agriculture, the most promising detoxification technology for food raw materials uses bacteria that have an antagonistic effect to micromycetes. For a better understanding of these mechanisms and with the aim of further more effective control of pollution, mycotoxin studies to assess the enzymatic properties of previously selected microorganisms-antagonists of toxin-forming microscopic fungi. In the study of amylolytic, proteolytic, lipolytic, cellulosolytic activity and the ability to produce catalase and chitinase, microorganisms with all the properties were not identified. Bacteria RPF1, RPF2, RPA3, PA4, PA7, PA8, RCF11, SB10, SB13, SB15, SB16, SB20 had activity in 3-4 groups of hydrolytic enzymes. The isolates PF7, RCF8, SB11, SB17 showed the maximum activity according to the studied parameters. From these microorganisms, an association of bacteria was created to suppress the growth and development of pathogenic micromycetes.
Dynamics of cortisol in calves against the background of the use of polymethylsiloxane polyhydrate as an anti-stress drug
Authors: Kletikova L V , Mannova M S , Yakimenko N N 
Published: April 2021

Abstract
Our core interest is the dynamics of cortisol in the period of delivery of calves when an environmentally safe drug polymethylsiloxane polyhydrate is being used. Experimental groups of calves received suspension of the drug at a dose of 0.1 g / kg, 0.3 and 0.5 g / kg of body weight. The cortisol level in the newborn calves was 7.12±0.06 mcg/DL, providing sufficient enzymatic activity. In calves of 5-day-old age, by the end of the colostrum period, the cortisol level significantly decreased, in the control group by 5.84 times, reaching 1.22±0.26 mcg/DL; in experimental groups 2, 3 and 4, respectively, by 6.3; 9.13 and 8.68 times (p≤0.05). When the calves reached the age of 15 days, the cortisol content in the calves in the control group was 0.10 mcg/DL; in groups 2, 3 and 4, respectively, it was 0.11; 0.12; and 0.14 mcg/DL. In comparison with the control group calves, the calves of experimental groups on the first 5 days of life, the drug at a dose of 0.1 g/kg of body weight contributed to a decrease in cortisol by 7.4%, at a dose of 0.3 g/kg-by 36.1%, at a dose of 0.5 g/kg-by 32.8%. While the drug was being used for 15 days, in groups 2, 3, and 4, the cortisol content was higher relatively to group 1 by 0.01 mcg/DL, 0.02 mcg/DL, and 0.04 mcg/DL, respectively. Therefore, for calves of 5-day-old age, the optimal cortisol concentration is 0.78-1.22 mcg/DL, for 15-day-old calves, respectively, 0.11-0.14 mcg / DL. We recommend that calves use a suspension of polymethylsiloxane polyhydrate at a dose of 0.3-0.5 g/kg of body weight on the first five days of life, followed by a dose of 0.1-0.3 mg/kg.