bluuebunny/crossref_metadata_2025_split huggingface dataset:
Using customizable simulation models of high voltage electrical circuits in educational process
Authors: Kirillov I E , Morozov I N , Cheltybashev A A 
Published: June 2022

Abstract
In the modern world, the issue of the use of digital technologies in the framework of teaching students in technical specialties is relevant. For a number of reasons, the solution of this issue is particularly important when preparing for training areas related to the electric power industry and high-voltage equipment. Software products that allow to carry out simulation modeling of technical systems are among the most accessible types of digital technologies used in higher educational institutions of Russia. When conducting classes on the study of transients in electrical circuits or electric drive control systems, students can use specialized software and build simulation models in the absence of real physical equipment. The paper assesses the need for training in the creation and use of simulation models of devices used in conducting high-voltage tests (using the example of a generator capable of realizing a high voltage of a given shape), as well as models of control systems of electric drives. An additional advantage contributing to the use of such schemes in teaching students is that the result of their work are the values of physical parameters presented in numerical form, which allows the developed models to be used as blocks or libraries for the implementation of larger-scale projects. A team of authors from the branch of the federal state budgetary educational institution of higher education “Murmansk Arctic State University”, Russia and the federal state autonomous educational institution of higher education “Murmansk State Technical University”, Russia process.
Formation of habitats in technogenic landscapes
Authors: Ivakina E V 
Published: June 2022

Abstract
The study of vegetation restoration in technogenic landscapes of Primorsky Krai of Russian Far East made it possible to identify a general algorithm for identifying succession series through an ecotopic approach. It is based on the analysis of landforms, substrate types, moisture category and vegetation cover. Using the landscape-geochemical classification, several types of ecotopes were identified: eluvial, transeluvial, transaccumulative, accumulative and subaqueous. Depending on the distribution of the selected ecotopes in different technogenic landscapes of the Primorsky Krai, the following habitats are distinguished: xeromesophytic, mesomorphic, hygromesomorphic and hydromorphic.
Improving the information content of seismic data and increasing the depth of investigation by choosing the optimal length of the amplitude adjustment operator
Authors: Akhmedov T R , Mamedova A M , Mamedov A A 
Published: June 2022

Abstract
The article is devoted to the role of digital automatic amplitude control in increasing the depth of seismic exploration. It is noted that the depth of productive strata is gradually increasing, at the same time, more powerful explosive sources are being replaced by relatively weak non-explosive ones. Naturally, during processing, it is necessary to pay close attention to the choice of parameters for adjusting the amplitudes. The article provides basic information about the form and amplitude of seismic vibrations, lists the main empirical formulas that characterize the dependence of the amplitudes of seismic vibrations on time. It is noted that when registering seismic vibrations, one has to deal with minimal soil displacements caused by the arrival of a seismic wave at the observation point, which must be amplified millions of times and their adjustment. In this regard, in the digital processing of seismic data, a technique was developed for recovering the true amplitudes, more precisely, the true amplitude ratio. Adjustment while maintaining the true ratio of amplitudes is used only when it is required to study the dynamics of the wave field (dynamic digital processing). The optimal choice of the length of the adjustment operator (or window) is of paramount importance, since with a small adjustment interval (less than 0.1 s), a loss of dynamic expressiveness of the recording may occur, and this is clearly shown in model studies. The article considers the efficiency of choosing the length of the optimal adjustment operator on the example of the Kurovdag area, which has complex both surface and deep seismogeological conditions. A summary of the Kurovdag field is given. An amplitude compensation function for spherical divergence is given, and to compensate for the effects associated with changes in reception and excitation conditions, a surface-matched amplitude adjustment was performed after removing amplitude bursts. A fragment of the time section is given before and after the optimal adjustment of the amplitudes according to the seismograms of the Kurovdag area, which clearly demonstrates how the information content of the time section increases and, thereby, the depth of the seismic exploration: before the optimal digital automatic adjustment of the amplitudes at times of 3.25 - 3.5 sec, no seismic horizons, while after this procedure, dynamically well-defined seismic horizons appear at the same times, reflecting the structure of the medium at great depths.
Dynamics of increasing the yield of vetch-triticale grass mixture due to the use of a new complex biofertilizer
Authors: Skamarokhova A S , Danilova A A , Agarkova N V , Babukhadia K R , Yu Arutyunova G 
Published: June 2022

Abstract
In the Krasnodar Territory, on the experimental field of the Krasnodar Research Centre for Animal Husbandry and Veterinary Medicine, an experiment was conducted to determine the effect of a new complex biofertilizer on the yield and biometric indicators of a vetch-triticale fodder grass mixture. The conducted experiment shows that with the use of a new complex bio-fertilizer, an increase in the density of planting is observed in triticale (by 16 pieces or by 24%) and in Glinkovskaya vetch by (15 pieces or by 30%). Empirically, it was found that it is best to cultivate vetch-triticale grass mixtures for livestock feed with varieties of Hungarian vetch, in particular with the Orlan variety, since this variety showed a greater increase in green mass both in the experimental and in the control variant. It was also found that the use of a new bio-fertilizer has a positive effect on the overall agrochemical characteristics of the soil, improving and enriching its composition.
Energy efficiency assessment of distribution networks
Authors: Zhilin E V , Yu Savvin N , Sapryka V A , Roshchubkin R P , Erofeev I A 
Published: June 2022

Abstract
This paper discusses the effectiveness and evaluation of the modes of distributed networks with a voltage of 33/11 kV. Using the example of a fragment of the distribution networks, the features of their construction and the main parameters are analyzed. The calculation of steady-state and post-emergency operation modes in the RastrWin software package was performed, which showed that voltage and power losses in the branches of the distribution network exceed the limit values. The classification of technical measures contributing to partial unloading of the network and increasing the capacity of power lines is given. The power values of additional sources in the form of distributed generation are taken in such a way as to compensate for the power losses in the corresponding connection nodes. An assessment of the efficiency distribution networks, taking into account the use of distributed generation, confirmed a significant reduction in voltage and capacity losses in the network branches and thereby an increase in electricity quality indicators.
Features of methane-hydrogen mixtures combustion in oxy-fuel power cycle combustion chamber
Authors: Malenkov A S , Kharlamova D M , Yu Naumov V , Karev T P 
Published: June 2022

Abstract
The paper is focused on the study of features of methane-hydrogen mixtures combustion in an oxy-fuel power cycle combustion chamber. The goal of the study is to find optimal combinations of thermodynamic parameters, allowing to bring the fundamental combustion characteristics, such as the normal flame propagation rate, the adiabatic combustion temperature, and the ignition delay time, closer to the parameters that are characteristic of traditional gas turbine plants. The research method includes digital experiments in the Chemkin-Pro software package using detailed kinetic patterns. The key features of the fuel combustion process in oxy-fuel power cycle combustion chambers are changing the diluent medium from atmospheric nitrogen to carbon dioxide, which is the working medium in the cycle, and applying a supercritical pressure (about 300 atm). Both changes negatively affect the combustion process intensity. To achieve the normal flame propagation rate and the maximum adiabatic temperature that are acceptable for the possible flame stabilization in the combustion zone, to exclude uneven heat release and large values of chemical underburning, the amount of CO2 diluent in the combustion zone shall be within the range of 10 to 20 % of the total amount of CO2 supplied to the combustion chamber.
The solutions of the problems of energy and transport decarbonization in Russia
Authors: Khasieva M A 
Published: June 2022

Abstract
The article concerns the problems of fight against Climate Change and Global Warming. Decarbonization of energy industry is necessary condition for reducing greenhouse gas emissions. Development of renewable energy sources, such as sun, wind, water (except for large hydroelectric power plants), geothermal springs, biofuels is limited by specific problems. Paris climate agreement, accepted by Russia in 2016, implies the necessity to reduce emissions by 25-30% of 1990 levels to 2030. This process is impossible without the nuclear energy development. The purpose of the article is to consider the potential of nuclear energy in solving the problems of climate change. The article is based on complex and system theoretical method and contains review and analysis of scientific conferences thesis, devoted to key-problems of nuclear energy industry in Russia and world, materials of reports of UNECE and UNSC, articles published in scientific journals. The most key advantages and disadvantages of nulear energy generation in terms of modern ecological problems are determined in the article to define the opportunities of nuclear energy integration to the system of “green” economy. The assumptions and forecasts of further development of modern energy industry are reflected in the conclusions of the article.
Study of the coolant type influence on the thermal and hydraulic characteristics of cooling channels for high-temperature turbine blades in an oxy-fuel energy system
Authors: Osipov S K , Lvov D D , Ostrovsky M A , Mechnik D A 
Published: June 2022

Abstract
Electricity consumption by people is increasing every year, followed by an increase in harmful emissions of carbon dioxide into the atmosphere during its generation. A promising solution to the problem of global pollution can be an oxy-fuel technology for energy production. It has been proven that the Allam cycle at an initial temperature of 1100 C is the most efficient oxy-fuel cycle. With a further increase in the initial temperature, the efficiency of this cycle decreases due to an increase in the relative coolant flow rate. This paper discusses the effect of the changeover from carbon dioxide to nitrogen coolant on thermal and hydraulic characteristics of cooling channels for the first-stage blade of a carbon dioxide turbine. We have found that, upon changeover from carbon dioxide to nitrogen cooling, the heat transfer coefficient decreases for a channel with pin intensifiers 1.3 to 1.65 times, for a channel with pin-and-dimple intensifiers, 1.65 to 1.77 times. We have also found that, upon changeover from pin intensifiers to pin-dimple ones, the heat transfer coefficient is increased for a cooling system using carbon dioxide coolant 2.2 to 2.5 times, whereas when using nitrogen coolant, the heat transfer coefficient remains unchanged. It has been also found that, to maintain a constant heat transfer coefficient upon changeover from carbon dioxide to nitrogen coolant, we should provide a 23.6% higher nitrogen flow rates compared to dioxide.
Scientific-technical analysis of the ambient temperature effect on the power of gas turbine installation in the conditions of Turkmenistan
Authors: Allakulyyev Sh , Altyyev B , Saryyev M , Hojalyyev A , Danatarova M 
Published: June 2022

Abstract
The rise of the ambient temperature decreases the performance of the gas turbine installations, i.e. efficiency of the GTI. To study this problem, namely, at what rate a drop of power and other parameters occurs, we decided to use the Mark VI software installed in the laboratory stand of the Department of Electric Power Stations of the State Energy Institute of Turkmenistan. In the result of the obtained data, it was concluded that at 15 °C ambient temperature, a GTI with an installed capacity of 127.1 MW will consume 7.7 kg/s of natural gas, while its energy efficiency is 36% or 100% of its nominal value, at 25 °C ambient temperature GTI consumes 7.3 kg/s of natural gas, its energy efficiency is 34.7% or 84% of its nominal value, and at 40 °C temperature GTI consumes 6.5 kg/s of natural gas, while its energy efficiency is 30% or 60% of its nominal value. Therefore, it can be stated that at elevated ambient temperatures, it is possible to forecast the performance of a GTI of all the capacities, gas consumption and power output in the conditions of Turkmenistan. If at the same time it is necessary to obtain the installed nominal capacity at elevated ambient temperatures, it becomes necessary to install additional cooling sources, where additional energy expenditures will be required, which in turn will lead to an increase in the cost of the electric energy.
The Initial stages of the reintroduction of the population of the species Dianthus acicularis Fisch. ex Ledeb. (Caryophyllaceae Juss.), endangered in the I. I. Sprygin Zhiguli State Nature Reserve
Authors: Shustov M V , Mamontov A K , Zueva M A 
Published: June 2022

Abstract
The experience of preserving the population of the species Dianthus acicularis Fisch. ex Ledeb. (Caryophyllaceae Juss.), which is endangered in the Zhiguli State Reserve. I. I. Sprygina. The initial stages of its reintroduction are considered, the features of the biology and ecology of the preserved natural populations are studied. Seed samples of the species were collected and multiplication under culture conditions was carried out. The resource possibilities of an artificial population for the potential reintroduction of authentic specimens of the species from the botanical garden into natural conditions were studied. A long periodicity of the formation of full-fledged seeds is shown - 1 time in 10 years, low seed productivity - about 30 seeds per individual and their low germination - 13%. The total absolute abundance over 10 years of observations has increased 4 times, has a tendency to stabilize and is not subject to changes over a number of years. The long-term dynamics of the D. acicularis abundance under the conditions of the GBS RAS is characterized by a decrease in the number of individuals of vegetative age states and an increase in the number of individuals with a generative age state, which indicates the formation of a mature population. The experience gained in creating an artificial population of D. acicularis under the conditions of the GBS RAS provides factual material on the prospects for ex situ conservation of the species and the possibilities for further creation of its reintroduced populations in the face of negative dynamics in the abundance of the species in natural conditions of the Zhiguli State Reserve. I.I. Sprygin.
The effect of biofertilizer “Bio Mix 1” on morpho-biological features of vegetable crops in greenhouse conditions
Authors: Hakobyan A H , Sargsyan G Zh , Kirakosyan G V , Martirosya G S , Tadevosyan L M 
Published: June 2022

Abstract
Research was carried out in the greenhouse of the Scientific Center of Vegetable-Melon and Industrial Crops in the period of 2018-2019. The effect of organic fertilizer “Bio mix 1” of Indian origin on morpho-biological features of plants, yield capacity, quality indicators of fruits and seeds of tomato, sweet pepper and cucumber has been studied. The results of the studies showed that in all studied crops “Bio mix 1” fertilizer promoted the plant growth, development and yield capacity, besides, the quality indicators of fruits and seeds were improved.
Monitoring of harmful objects of strawberry in the conditions of Central Yakutia
Authors: Belevtsova V I , Sorokopudov V N , Sorokopudova O A 
Published: June 2022

Abstract
This article provides monitoring of pests and diseases of strawberries in the conditions of Central Yakutia for the period since 2010. The research results were obtained on the basis of the Yakut Scientific Research Institute of Agriculture named after M.G. Safronov. The studies of harmful objects are based on standard methods for their determination. During the research since 2010, it has been established that strawberry leaf beetle, weevil, dead beetle, wireworm, slugs and leafhoppers are classified as less dangerous pests, the damage to which is not significant and depends on weather conditions. In recent years, due to the anthropogenic nature of the territories, birds of the thrush family have been identified as malicious pests of strawberries, which cause irreparable damage to the crop. For bird control, we recommend using mosquito nets, which can largely save the crop. In view of the use of strawberries for the nutrition of the population, over a long period of research (2010-2020), we have identified a biologically proven method of combating diseases and pests using timely treatments with onion peel infusion throughout the growing season, which are effective in combating pests and allows you not to use toxic chemicals, keeping strawberry plantings in an environmentally safe state. An effective way to prevent damage to strawberry leaves by spotting has been revealed - regular treatments with phytosporin. These developments in the culture of strawberries in the conditions of Yakutia make it possible to grow environmentally friendly products for the population.
Application of Callopian clay to improve the productivity of zinc-contaminated soils in lawn ecosystems
Authors: Nevedrov N P , Protsenko E P , Popova G I , Sabr Saad 
Published: June 2022

Abstract
Pollution of lawn soils with heavy metals leads to the suppression of life and activity of living organisms inhabiting these ecosystems. The use of various means of soil detoxification will make it possible to neutralize the effect of technogenic pressure on the functional properties of urban ecosystems. The article presents data on the sorption-fertilizing properties of Callovian clay when used in zinc-contaminated soils of lawn ecosystems. The study used a small-plot field experiment, which simulated artificial contamination of agro-gray soil with zinc. The article discusses 2 methods of tillage and 4 doses of fertilizer-sorbent. It was found that the use of Callovian clay led to an increase in the production of raw and dry phytomass of lawn grasses by 3.7 - 33.2%, microbiological activity of soils by 0.9 - 132.5 times, as well as a decrease in zinc toxicity by 10 - 25%. The sorption-fertilizing effect and the optimal doses of the applied Callovian clay were determined by the time when the Callovian clay was introduced into the soil (autumn or spring).
Liquid nitrogen removal of lunar regolith simulant from spacesuit simulants
Authors: Wells I , Bussey J , Swets N , Reising L , Butikofer C , Wallace G , Kulsa S , Leachman J 
Published: June 2022

Abstract
Lunar dust is a major concern for future missions to the Moon. The small size, abrasiveness, sharp morphology, toxicity, and pervasive nature of the dust can cause significant distress to both human health and equipment. Traditional spacesuit cleaning methods such as brushing and vacuuming have limited effectiveness and pose risks such as suit fabric abrasion and seal contamination. A novel mitigation method is to harness the properties of cryogenic liquids. As the liquid rapidly boils, insulated droplets form that lift and carry the dust away from the suit material, migrating toward the lowest point in an airlock for convenient collection. This publication discusses initial testing of the concept for removing lunar regolith simulant from spacesuit simulants with liquid nitrogen. A cryogen sprayer technology was adapted to investigate the effect of angle, application distance, and application time on the efficacy of dust removal. Methodology and uncertainty are presented to determine a removal percent by mass. Preliminary results show mass removal of simulated lunar dust from simulated spacesuit fabric to be greater than 90% for particles less than 10 microns. Estimated calculations are presented to demonstrate the suitability for using the concept to efficiently clean spacesuits and for the ancillary purpose of pressurizing an airlock.
Analysis of heat transfer from a local heat source at cryogenic temperatures
Authors: Johnson W L , Balasubramaniam R , Grotenrath R 
Published: June 2022

Abstract
Understanding the dispersion of heat around a cryogenic fluid tank, specifically the interaction between the cryogenic fluid and the tank wall is critical in the analysis of long duration cryogen storage in microgravity. The heat transfer interaction between a cryogenic storage tank and heat sources from external spacecraft structures is also one of the many factors that determine how much heat enters a tank. Recent flight experiments with two-phase fluids have indicated that local concentrations of heat input (also known as “hot spots”) can cause unwanted affects including local boiling. Computational fluid dynamic (CFD) models can provide a detailed assessment of the heat transfer occurring across a cryogenic storage system. However, CFD modeling takes time to construct and run. A simpler approach that can act as initial guidance for later CFD modeling analyzes external “hot spots” as point or finite heat sources. A radial, finite element network or a local direct solution can effectively estimate the heat spread across a cryogenic storage tank by calculating the temperature and heat load as a function of distance from the heat source. This calculation accounts for the convective heat transfer between the cryogenic fluid and storage tank surface. Similar approaches can be used to determine the effectiveness of cooling from a cryocooler as a finite, local heat sink. This approach allows for quick approximations of the thermal map across a cryogenic tank as well as sensitivity analysis under a wide range of design parameters including gravitational fields as implied through natural convection coefficients.