bluuebunny/crossref_metadata_2025_split huggingface dataset:
Field Tests of Colters with Two-Plane Grass Seed Spreader
Authors: Lopareva S G , Mekshun Yu N , Loparev D V 
Published: March 2021

AbstractMulcher seeder with mechanical seeding of seeds equipped with tine coulters do not fully ensure uniform distribution over the width of the opener. The best nutritional conditions of the plant are obtained with the subsoil-dispersive method of sowing. A scheme of a coulter with a two-plane grass seed spreader, which provides a subsurface-spread method of sowing is proposed.The movements of grain in the understock space of a plow coulter were described by the numerical methods in the Mathcad program. Theoretical studies determined the influence of various factors on the particle trajectory and established the laws of the seed distribution process. Laboratory studies have determined the main design parameters of a two-plane grass seed spreader. The results of scientific research served as the basis for the development of a two-plane grass seed spreader of a tine coulter.To confirm the reliability of theoretical and experimental study results conducted field tests. For field tests on the planter experimental tine coulters with a two-plane spreader are installed. After 100% of the emergence of seedlings in field conditions the uniform distribution of plants was determined. The uniform distribution of seedlings was determined by a frame with a size of 1000x1000 mm with cells measuring 50x50 mm. The frame was superimposed on the seedlings and counted the number of seedlings in each cell. As a result of the sowing analysis the uniform distribution over the width of the coulter and the feeding area was determined.The two-plane spreader for subsoil-free sowing is intended for the modernization of tine coulter stubble seeders with mechanical seeding of SZS-2.1M and SKP-2.1 type seeds. The coulter equipped with such a spreader ensures the sowing process with higher quality indicators of the uniform distribution of seeds, which allows to obtain a yield increase of 10 … 12%.
Fish as a Cause of Diphyllobothriosis in the Population of Yakutia
Authors: Platonov T A , Nyukkanov A N , Kuzmina N V 
Published: March 2021

Abstract
High incidence of diphyllobothriosis in the middle reaches of the Lena river and all links of biocenotic relationships between potential intermediate, additional and definitive hosts prove the existence of a hotbed of D. latum in the study area. The circulation of the tapeworm follows the following pattern: human, carnivorous domestic animals – copepods – Coregonus tugun — human, carnivorous domestic animals. The main factor in the transmission of the invasive species is the traditional consumption of insufficiently disinfected salted fish by the population.
The Analysis of Injected Water into O-1 Formation of the Central Block of the Talakan Oil and Gas Condensate Field in Order to Identify and Predict Zones With High Risk of Salt Precipitation
Authors: Ilzit E 
Published: March 2021

Abstract
The value of this research work involves the search for newer and best options of salt precipitation prediction in wells for fields in Eastern Siberia using the example of the Cenral Block of the Talakan oil and gas condensate field. The development of this block is complicated by the presence of salt impurities in a pore volume and highly mineralized formation water represented as calcium chloride brine while the source of gypsum deposits is injected water containing excess sulfate ion values. Prediction and control for scale during oil production is essential for practical tasks since the effectiveness of actions for elimination of salt sediments, prevention and protection of oilfield equipment depends on the prediction and timely detection of salt deposits in wells, on pumping equipment, in oil gathering and processing systems. If there is a problem, it is necessary to monitor it and prevent negative events leading to unproductive costs and losses in oil production, especially in the conditions of market relations, when the development of oil fields should be cost-effective.
Influence of Biodegradation Processes on the Relative Distribution of Normal and Isoalkanes in Oil
Authors: Chemodanov A E , Ziniukov R A , Nourgaliev D K 
Published: March 2021

Abstract
The article presents research and describes the mechanism of aerobic biodegradation of oils of various origins. The influence of degradation processes on the relative distribution of normal alkanes and isoprenoids is considered. When drawing conclusions about the type of source substance, sedimentation conditions, and maturity parameters based on biomarker correlations, it is essential to exclude the presence of biodegradation, or take into account its influence in relation to the objects under study. The practical significance of the research lies in the fact that the selectivity of oil biodegradation in terms of various effects on the ratio of isobutane/n-butane can be used to clarify the remaining reserves of oil fields.
Sewage Sludge Utilization for Power Production
Authors: Lyubov V K , Popov A N , Malkov A V 
Published: March 2021

Abstract
It has been experimentally shown that the Metso Hybex steam boiler, installed at CHP-plant No.1 of AO APPM and designed to burn a mixture of bark and wood waste and sewage sludge, ensures their efficient utilization without fuel oil support flaming. The gross efficiency was 85.22–85.24% at boiler unit loads close to the nominal. The environmental performance of the boiler fully complies with the requirements established by directive 2010/75/EU and GOST 50831-95. The operation of the boiler ensured the complete utilization of sewage sludge generated at the water and wastewater treatment facility. The annual savings of fossil fuels amounted to more than 80 thousand tons of reference fuel. The total content of heavy metals emitted into the atmosphere with fly ash by a Hybex boiler with a bubbling fluidized bed when burning high-moisture biofuels is many times lower than when burning coal.
Improving the Reliability of Remote Nodes Hydroficated Machines
Authors: Pugin K G , Piramatov U A 
Published: March 2021

Abstract
The article discusses the existing trends in the development of diagnostic methods for hydraulic systems of technological machines. A description of the methods for diagnosing hydraulic systems using various approaches is given. The studies of contamination of the working fluid in various sections of the hydraulic systems presented in the article confirm the inefficiency of the existing diagnostic methods used for modern technological machines. The presence of dead-end branches in hydraulic systems does not allow us to fully judge the technical reliability of the machine as a whole. The results of the analysis of samples of the working fluid of hydraulic systems of construction and mining drilling machines taken from different sections of hydraulic systems are presented.
Current Issues to Diagnose Electric Connections of the Traction Energy System
Authors: Ignatenko I V , Vlasenko S A 
Published: March 2021

Abstract
Currently, the task is to increase the capacity of the Russian Far Eastern Railway in the direction of ports on the Pacific Coast. This causes a significant increase in loads in the traction energy system, and under such conditions, the serviceability of the electric power infrastructure is crucial to ensure. In this regard, the stability of operation can be increased by improving the monitoring and diagnostics systems of the traction network elements. One of these elements is the electrical connection which has always been the most sensitive in the power grid. Therefore, the identification of factors that affect its failure, as well as the logic in maintenance and repair are relevant and significant not only for railway networks but for the electric power industry as a whole.
Risk Assessment on Human Health: the Case of Primorsky Krai Abandoned Sulfide-Rich Tailings Dump
Authors: Frolov K R , Artemova M I , Ponomarev O A 
Published: March 2021

Abstract
To evaluate the human health risk, the Vetvisty creek (Vysokogorsk settlement, Primorsky krai) water quality monitoring was performed, and health risk associated with exposure to metals via oral ingestion was calculated. The results of inductively coupled plasma-mass spectrometry analyses for six samples collected in May, August, and November 2019 demonstrated a spatial variation of dissolved metals concentrations in the Vetvisty creek flow at stations before and after the tailings dam. The obtained characteristics of creek water samples allowed us to reveal, that the greatest contribution to carcinogenic risk is made is made by arsenic (up to 0.00160 mg/L and 2,99×10−5 of individual lifetime risk). The obtained cancer risk associated with exposure to metals via oral ingestion have the values of 3,17×10−5 and 2.28×10−5 before and after the Vysokogorsk tailings dam, respectively. All the risk levels are in carcinogenic risks range acceptable by United States Environmental Protection Agency and do not require any additional measures except of dissolved metals content control.
Digital Technology in Agricultural Sector
Authors: Marinchenko T E 
Published: March 2021

Abstract
The digitalization of production in agriculture is a global trend, there is a great research and investment interest in digital technologies. The national priorities of present Russia to be determined by the program documents of the country’s socio-economic development for the period up to 2030 imply the use of the wide possibilities of digital technologies to ensure the entry of the Russian Federation into the number of the largest economies in the world. Since the state has set a task to transform agriculture through the introduction of digital technologies, the issue of introducing information technologies in small and medium-sized enterprises that lack investment is very relevant. The purpose of the study is to analyze the positive experience of introducing digital technologies by farmers, in particular blockchain technologies, to determine the prospects for the process and justify the dissemination of positive experience. The promising areas of using digital technologies in farms are analyzed and substantiated. These technologies make it possible to simplify the sale of products, eliminate unnecessary intermediaries, provide investments in the development of production, logistics and certification, as well as the development of rural areas and infrastructure. ICO and crowdfunding can be a starting point for the development and upgrading of farms. Therefore, information on successful practices in the application of information technologies should be popularized among farmers for wider dissemination among farmers.
The Study of Dust Nanoparticles and Their Impact on the Health of Mining Workers
Authors: Aleksandrova A Yu , Timofeeva S S 
Published: March 2021

Abstract
Throughout evolution, human lungs adapted to fighting respiratory tract infections and less so to mitigating the impacts of non-organic microparticles. When an infectious agent, immune complex, or a dust particle contacts with the phagocyte membrane, the oxygen consumption increases so intensively that this phenomenon received the name of “respiratory explosion”. The miner diseases are too numerous to cover them all in this article. Therefore, this work deals with the negative effects of marble and granite dust on the development of professional diseases. These are the most widely spread mineral rocks in Irkutsk Oblast and Russia in general. This research found that the inspected workshops in Irkutsk Oblast have high levels of pollution with granite and marble dust. Marble and granite dust from the quarries of Irkutsk Oblast contains between 40 and 80% of silicon dioxide (SiO2) in a free state. The dust of marble and granite mines causes dust-related lung diseases. We shall focus on their symptoms, diagnosis, and clinical features. This research was carried out with financial support from RFBR within the scope of the research project No 19-35-90096.
Evaluation of the Technical and Economic Efficiency of Oil-Contaminated Wastes Recycling System Based on DEA-Method
Authors: Afinogentov A A , Derevyanov M Yu , Pleshivtseva Yu E 
Published: March 2021

Abstract
The article presents a method for analysis of technical and economic efficiency of oil-contaminated wastes (OCW) recycling system. The approach is based on a comparative analysis of the values of costs and profits for the processing of waste in a particular storage facility using a specific processing technology for various combinations of storages and technologies. The set of compared combinations was compiled on the basis of data on the actual processing technology applied for the OCW recycling in the particular storage and also for the technology selected using a special evaluation algorithm. The algorithm for optimization of the OCW recycling system includes the determination of the reuse potential assessments for OCW storage facilities, as well as evaluation of environmental safety and energy efficiency assessments for processing technologies. The calculation of efficiency estimates is carried out using the DEA method, which is widely used as a method of multi-factorial assessment of the efficiency of production systems, using specially developed software.
Restoring the Boundary Condition and the Initial State in the Variational Data Assimilation Problem for the Black Sea Dynamics Model
Authors: Shutyaev V P , Parmuzin E I 
Published: March 2021

AbstractIn the present paper, we formulate an inverse problem of assimilation of sea surface temperature for a sea thermodynamics model aimed at the reconstruction of the heat flux and the initial state. We assume, that the unique function which is obtained by observation data processing is the function of sea surface temperature (SST). Numerical experiments on restoring the surface heat flux and the initial state for the system of the Black Sea primitive equation hydrodynamics model (temperature, salinity, velocity, and sea surface level) with assimilation procedure were carried. The results of the numerical experiments are presented.
The Formation Features of Sustainable Tourism in the Russian Federation
Authors: Ignatieva T A , Karpova G A , Pilyavsky V P 
Published: March 2021

Abstract
The article describes the main criteria for sustainable tourism development, systematizes recreational territories by their capacity and types of recreational and eco-tourism activities, provides a system of qualitative and quantitative indicators of the ecosystems state, and suggests using a mechanism for forming and promoting the brand of a tourist destination in the Russian Federation.
Ways to Reduce Carbon-Dioxide Emissions at Brewery Enterprises
Authors: Ivanchenko O B , Balanov P E , Smotraeva I V 
Published: March 2021

Abstract
The world community is concerned about the global climate warming, among the reasons for which the increasing amount of carbon dioxide emitted is being considered, and carry out a systematic work to reduce greenhouse gas emissions into the atmosphere. Carbon dioxide (CO2) is one of six types of gases (along with others), the content of which should be reduced, in accordance with the international obligation of Russia. In this regard, the Russian enterprises producing carbon dioxide as a by-product must also understand the current environmental issues and try to reduce their emissions. In this paper, solutions are proposed for the correct emission of carbon dioxide in breweries.
Evaluation of Vibration Treatment Effect on Mechanical Properties of Welded Joints of Steel Pipes 5CrMo16
Authors: Tokarev A S , Karetnikov D V , Fairushin A M 
Published: March 2021

Abstract
In modern refining conditions associated with increasing requirements for the quality of products produced and ensuring the safety of processes, the operating conditions of the equipment are becoming more complicated, and the range of materials used is expanding. A significant part of the equipment, especially used to carry out high-temperature processing processes in hydrogen sulfide and oxidative sulfur-containing media, is made of heat-resistant chromomolybdenum steels of the type 5CrMo16, the welding process of which is quite complicated. In this work, studies of the mechanical properties of welded joints made of steel are presented 5CrMo16 under various modes of loading welded joints during welding, and new results on the crack resistance of welded joints during repeated heating are also experimentally obtained. Conclusions on the level of residual stresses in the samples, strength characteristics of the weld, as well as the fracture resistance of the weld metal of the examined samples were made.
Analysis of the Investments Impact in the Field of Eco-Innovation on the Environmental Safety of Industrial Regions
Authors: Pepelyaeva A , Elokhova I , Karpovich Y 
Published: March 2021

Abstract
The article analyzes the innovative activities of Russian enterprises that ensure the improvement of environmental safety, environmental protection and rational use of natural resources. Since the environmental safety of Russian regions is influenced by their sectoral structure of economic activity, a cluster analysis of Russian regions by the prevailing type of economic activity is carried out within the framework of the author’s methodology. As a result of clustering, 7 clusters were identified. The assessment of the eco-investments’ impact on the environmental safety of territories was carried out using the example of cluster 1 "Industrial- diversified regions". A regression analysis of the assessment of the eco-innovations’ impact on the environmental safety of regions was carried out using the example of the leading regions in cluster 1 in terms of the volume and dynamics of costs for eco-innovations. The constructed models demonstrate a significant relationship between the eco-innovation activities of enterprises in the evaluated regions and the costs of its implementation and regional environmental safety.
Integrated and Unit Diagrams in Locomotive Traction Drives
Authors: Antipin D Ya , Nadtochey D G , Bondarenko D A 
Published: March 2021

Abstract
The problem of finding rational structural schemes of traction drives of freight and passenger locomotives with asynchronous traction electric motors is considered. It has been established that existing trends in the development of traction drives lead to the use of an integrated circuit that can improve reliability and durability due to a significant decrease in the manufacturability of production and repair. An aggregate layout scheme of the traction drive, which is easier to manufacture than the known analogues of the integrated type is proposed, as well as solutions to improve the manufacturability of integrated drives. The proposed designs are patented.
Possibility of Environment-Friendly Hydrometallurgical Treatment of Copper-Zinc Concentrate Containing Arsenic
Authors: Artykova A V , Melamud V S , Boduen A Ya , Bulaev A G 
Published: March 2021

Abstract
Pyrometallurgical treatment of copper concentrates containing arsenic poses a problem due to the emission of toxic gaseous arsenic oxides. Therefore, the development of effective environment-friendly hydrometallurgical approaches allowing extracting metals from these concentrates without gas emission is a relevant issue. The goal of the present work was to study the effect of chloride on the bioleaching of Cu-Zn concentrate containing tennantite and solid residue of its alkaline sulfide leaching (ASL) in order to evaluate the possibility to improve bioleaching of Cu-Zn concentrates containing tennantite using ASL pretreatment and NaCl addition. In NaCl absence, bioleaching of the concentrate made it possible to extract 52 and 62% of Cu and Zn for 30 days. The addition of 100 mM NaCl allowed extracting 66 and 93% of Cu and Zn. In the same time, bioleaching of ASL residue made it possible to extract 74 and 66% of Cu and Zn, while NaCl addition to the medium inhibited Cu and Zn extraction during ASL bioleaching and 35 and 62% of Cu and Zn were leached. Thus, it was shown, that both ASL pretreatment and NaCl addition increased the rate of copper and zinc bioleaching from the concentrate, while NaCl addition to the medium led to inhibition of ASL residue bioleaching. Therefore, both methods can be considered as promising approaches to increase metal extraction from Cu-Zn concentrates containing tennantite but the effect of each factor should be studied in detail to develop effective technologies.
2D Seismic Interpretation and Characterization of the Upper Qishn Clastics in Sharyoof Oil Field, Masila Basin, Yemen
Authors: Abdullah E A , Kotelnikova E M , Hassan M A 
Published: March 2021

Abstract
The Sharyoof oil field is located off shore in Block 53 in the northeastern part of the Syaun-Masilah Basin, in the province of Hadramaut, 550 km from the city of Sana’a, the capital of Yemen. Fifteen 2D seismic lines along with six wells data are used to construct subsurface geological profile, and to identify major structural features in the study area. Synthetic seismograms have been constructed using sonic and density log for all available wells to tie horizons to seismic data and to generate time and depth subsurface maps. This research has been carried out using integrated 2D seismic and petrophysical studies in Sharyoof oilfield. Using the analysis and interpretation of seismic data, the main structural faults were identified, maps of isochrones, structural maps of depth and thickness were constructed, which subsequently will allow us to correctly determine the deep geological structures in Upper Qishn Clastics member and evaluate the oil horizons of the Sharyoof oilfield.
Ecological and Economic Assessment of Anthropogenic Impact on Deer Pastures
Authors: Zhelonkina E E , Pafnutova E G , Valiev J S 
Published: March 2021

Abstract
Due to the great industrial pressure, the northern territories suffer from heavy pollution. This leads to the deterioration of all biological resources in this region, the breakage of natural food chains, including the deer food resources which are crucial for the traditional nature management practices of the indigenous peoples of the North. Unsatisfactory conditions at deer pastures and the improper use of the pasture lands lead to the reduction of deer foraging lands due to their transformation into industrial facilities (mostly). This calls for an assessment of environmental damages done to the territories. It is also crucial to perform an economic assessment of actions aimed at the reduction of anthropogenic load in the polluted areas.
Solid-Phase Reagents on the Modified Silica Gel Base for the Rapid Determination of Nickel(II) Ions
Authors: Maslakova T I , Pervova I G 
Published: March 2021

Abstract
The new solid-phase reagent is synthesized by previous modifying the surface of silica gel with l-(4-sulfophenyl)-3-methyl-5-(benzoxazol-2-yl)formazan for Ni(II) ions determination in water. The high effective colour change (Δλ = 200 nm) is observed due to complex-formation reaction reagent with nickel (II) ions. Increasing toxicant concentration is accompanied by growth the colour intensity of the solid-phase sorbent, which form the basis of colour scale development for the Ni(II) ions determination in the range 10-100 mkg/ml. Ni(II) ions determination can’t be disturbed by the presence of Co(II) ions, alkali or alkali-earth metal ions. Proposed technique is high rapid (its max duration is 2-3 min), ordinary (it is required neither expensive equipment nor qualified staff to use the technique) and ecological friendly.