bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optoelectronic properties of RuCrX (X = Si, Sn, Ge) Half Heusler alloys: a DFT study
Authors: Shah Syed Tauseef Hussain , Almalki Ahmed M , Sagar Sadia , Mustafa Ghulam , Bahadar Ali , Hossain Nazia 
Published: March 2023

Abstract
The aim of this study was to investigate the structural, electronic, optical, and thermal properties of optoelectronic Half Heusler Alloys, RuCrX (X = Si, Sn, Ge). The characterizations of these Half Heusler Alloys, RuCrX (X = Si, Sn, Ge) have been performed using Density Functional Theory (DFT) through first-principles calculations with the aid of WIEN2K code. The Generalized Gradient Approximation (GGA) was utilized as an exchange-correlation function in WIEN2K-Package to optimize the structures.. To obtain the necessary observational quality and desired properties, Full Potential Linearized Augmented Plane Wave (FPLAPW) was applied. The calculation of the lattice constants and band gaps was crucial to determine suitable materials for specific optoelectronic applications. This study also emphasized the complex dielectric function and elastic properties leading to the imaginary part of the dielectric functions showed that compounds were optically metallic and transparent with ductile properties. Also, the optical spectra and band structure transitions were studied in detail. Hence, the study predicted that Half Heusler Alloys, RuCrX (X = Si, Sn, Ge), have the potential for applications in optoelectronic devices.
Novel propagation phenomena: behaviors of local trend imitation on multiple limited contact networks
Authors: Zhu Xuzhen , Liu Siyuan , Tian Yang 
Published: March 2023

Abstract
The local trend imitation(LTI) feature behavior has been deeply studied on specific complex networks, but it still needs to be explored in more scenarios. In fact, the multiple networks with individual limited contact feature is more in line with the real scenario. On the multiple limited networks, a novel model is proposed to investigate the effects of individual contact capacity heterogeneity. Then,information propagation mechanism is then measured and examined using a developed partition theory. The experimental results show crossover occurrences of phase transition. In the new network model, the final spreading scope exhibits a second-order continuous growth when individuals display a positive LTI behavior. Individuals have a passive LTI behavior, however, the final spreading scope exhibits a first-order discontinuous growth. Besides, a greatest ultimate spreading size appears at an ideal LTI parameter with the unit spreading probability changing. Additionally, individual contact capacity heterogeneity changes the rate of information spreading and the global adoption pattern. Eventually the outcomes of the theoretic analysis match those of the simulations.
Synergy of porous and air-gap structures for pressure sensing arrays with high sensitivity and wide detection range towards machine learning-assisted gait analysis
Authors: Zhang Wanli , Zhou Zaiwei , Chen Shiqi , Zhang Yue , He Bingwei 
Published: March 2023

Abstract
A smart insole based on pressure sensing arrays is a simple and effective means of gait analysis assist in the assessment of human movement and neurological health. However, these smart insoles usually fail to combine high sensitivity with a wide detection range, making them only suitable for people within a certain body weight range. Here, based on the synergy of porous and air-gap structures, we develop a high-performance and high stability smart insole, which has a sensitivity of up to 16.064 kPa−1 in a wide pressure range of 0.170 Pa to 248 kPa. After combined with Decision Tree machine learning model, gait classification and recognition can be as high as 99.96%. Based on these, a tap dance game was designed, which proves its ability to identify individual activities, and demonstrates its potential of application in the field of human-computer interaction and medical engineering.
Coalgebra symmetry for discrete systems
Authors: Gubbiotti G , Latini D , Tapley B K 
Published: March 2023

Abstract
In this paper we introduce the notion of coalgebra symmetry for discrete systems. With this concept we prove that all discrete radially symmetric systems in standard form are quasi-integrable and that all variational discrete quasi-radially symmetric systems in standard form are Poincaré–Lyapunov–Nekhoroshev maps of order N − 2, where N are the degrees of freedom of the system. We also discuss the integrability properties of several vector systems which are generalisations of well-known one degree of freedom discrete integrable systems, including two N degrees of freedom autonomous discrete Painlevé I equations and an N degrees of freedom McMillan map.
Classical triangular lattice antiferromagnetic Ising model as a free-fermion/superconductor system
Authors: Nourhani Amir , Crespi Vincent H , Lammert Paul E 
Published: March 2023

Abstract
We present a treatment of the triangular lattice antiferromagnetic Ising model (TAFIM) based on a small number of elementary ideas common to statistical and solid-state physics. The TAFIM is represented as a reduced BCS model in one space, one (imaginary) time dimension. The representation is approximate for nonzero temperature, but allows quick derivation of asymptotically exact thermodynamic functions, and the divergence of the spin–spin correlation length. The fermionic representation is exact at zero temperature. We demonstrate the existence of a two-dimensional continuum of zero-temperature equilibrium macrostates characterized by satisfied bond fractions of the three different orientations, and calculate their entropy densities.
Climate changes analysis in the Volga Region and the Urals
Authors: Nesterenko Yu M , Solomatin N V , Nikiforov S E , Yu Nesterenko M , Kapustina O A 
Published: March 2023

Abstract
The article analyzes the changes in annual air temperatures and precipitation in 13 cities of the Volga region and the Urals of Russia and reveals differences in the rates of climate change over time and by seasons in the forest and steppe zones. In the studied regions, on average in 1887-2020, based on 100 years, the annual air temperature increased by 1.8 °C, winter by 2.3 °C and summer by 1 °C. It increases 20% faster in the steppe zone. On average, in the forest and steppe zones during this period, annual precipitation increased by 55 mm mainly due to winter precipitation.
Model of a stationary thermal detonation wave in the “liquid lead – water” system for safety analysis of NPP with the reactor BREST-OD-300 during heat exchanger tube break accident
Authors: Melikhov V I , Melikhov O I , Saleh B 
Published: March 2023

Abstract
This paper presents a mathematical model of a stationary wave of thermal detonation in the “liquid lead - water” system, which can occur after the rupture of a steam generator tube of the reactor BREST-OD-300. The model is based on the mechanics of multiphase fluid flows. The system under study includes a continuous phase of liquid lead, in which drops of water surrounded by a steam film are dispersed. Heat exchange between high-temperature molten lead and water drops is carried out in the film boiling mode. A shock wave propagating in this multiphase system causes all phases in motion. Due to the significant difference in density between liquid lead and water, a difference in velocities arises between dispersed water drops and liquid lead, which cause the fragmentation of water droplets. The shock wave velocity and amplitude are determined by constructing the shock adiabat and the Hugoniot adiabat for the parameters of the studied multiphase mixture. To describe the fragmentation of water droplets, heat transfer between phases, and interfacial friction, the empirical correlations of the thermal detonation theory are used. The obtained numerical solutions describe the distributions of parameters in the zone of melt – water interaction.
The influence of a noncondensable gas on the collapse of a bubble in a stratified steam explosion at NPP
Authors: Melikhov V I , Melikhov O I , Yakush S E , Saleh B 
Published: March 2023

Abstract
In the present work, the effect of a noncondensable gas on the collapse of a hot bubble in cold water was studied. It is assumed that the bubble consists of a gas mixture of steam, which can condense on cold water, and a noncondensable gas. The dynamics of the bubble was modeled by the integral equations of mass and energy supplemented by the steam diffusion equation. The steam condensation rate was determined by heat fluxes on the interfacial surface from the steam and water sides. It was used a one-dimensional spherically symmetric approach. The water surrounding the bubble was considered as an incompressible fluid, the flow of which was described by the Rayleigh-Plesset. Heat transfer in water is described by a one-dimensional heat equation, which takes into account conductive and convective mechanisms of heat transfer. Calculations performed using this model showed that the presence of a noncondensable gas in a bubble does not significantly affect its collapse in cold water. This means that the noncondensable gas cannot significantly weaken the impact of water on the melt, which occurs when a bubble collapses near the interface, which leads to a stratified steam explosion.
Influence of nanoscale objects on grain processing: results of mashing in the presence of Al2O3 nanoparticles
Authors: Karpenko D V , Tsyganova V V , Nasedkin A S , Artemeva V S 
Published: March 2023

Abstract
The article considers the influence of nanoscale objects on grain raw materials processing on the example of beer wort preparation. The effect of aluminum oxide nanoparticles present in the mash on the first wort indicators (concentration of dry and reducing substances, amine nitrogen) obtained by infusion or single-decoction mashing was studied. It was revealed that the influence of Al2O3 nanoparticles depends on their concentration, the object of influence and the method of preparation of beer (first) wort. The most sensitive to the presence of aluminum oxide nanoparticles under the experimental conditions were saccharifying hydrolases of grain raw materials. That caused the greatest fluctuations in the concentrations of reducing substances in the test samples of the first wort. Nanoparticles had the least pronounced effect on grain proteases, as a result fluctuations in the concentration of amino acid nitrogen in the experimental variants of the first wort were the smallest. When obtaining beer wort by the infusion method, the effect of nanoparticles was more pronounced than in single-decoction mashing. The concentrations of aluminum oxide nanoparticles were revealed, the excess of which led to a significant deterioration in the controlled parameters of the first wort - 1.5-2 mg/cm3, depending on the method of mashing.
Short-Term Electrical Load Forecasting Based on Neural Networks
Authors: Kuantayev N , Bainiyazov B A , Uakhitova A B 
Published: March 2023

Abstract
The article sets out the use of an artificial neural network for electrical load consumption forecasting. Electrical load prediction is one of the most demanded areas of research in the electric power industry. The two-layer artificial neural network of direct distribution with the number of neurons in the hidden layer equal to 6 was proposed in the article. The following data was taken as an input for forecasting short-term electrical load: electrical load, time, day of the week, temperature, day, weekend and working day code. According to the studies, the value of the mean absolute percentage error was 2.35, using the Bayesian Regularization learning algorithm.
To calculation of basic parameters of the drum-type root crop grinder
Authors: Ayugin N P , Morozov A V , Ulyanov M V , Kalimullin M N , Vasiliev A O , Fomenko N L 
Published: March 2023

Abstract
The article is devoted to the study of the root crop grinder, its design and design features are presented.The calculation of the forces which act upon the crushed feed during operation of the developed grinder was carried out. Formulae for calculation of geometric dimensions of the drum of the grinding unit, the hopper and the cutting elements are given, as well as the throughput capacity of the grinder. The research results can be used for development of root crop grinders which prepare root crops for feeding of farm animals.
To the study of the vibration in an acoustic medium with coating excited by a concentrated harmonic source
Authors: Pavlova A V , Rubtsov S E , Telyatnikov I S 
Published: March 2023

Abstract
When monitoring dangerous geodynamic processes, it is topical to study wave fields on the surface of geological structures and, since on the scale of the Earth’s structure, lithospheric plates can be considered as coatings of small thickness, a plate is accepted as the simplest model of an extended lithospheric one. The paper considers the problem of the plate oscillations on the surface of an acoustic layer, excited by the effect of a concentrated harmonic source located in an acoustic medium. The solution is built using an integral approach well developed for similar problems arising in geophysics, seismoacoustics and ecology. Integral representations of the amplitude values for the stress on the lower boundary of the coating and the surface displacements of the structure under consideration are obtained.
Height-Diameter fixed effects models for the pine in European Russia
Authors: Dubenok N N , Lebedev A V , Gostev V V , Gemonov A V , Gradusov V M 
Published: March 2023

Abstract
The purpose of the study is to select and justify a regression model that will most accurately reflect the dependence of heights on the diameters at breast height of pine plantations in the European part of Russia. 28 height-diameter models were selected based on literary sources and tested for research. Näslund’s equation is justified as the best model for the relationship between height and diameter at chest height. It can be applied in practice when performing forestry and research work in pine forests of the European part of Russia.
Current state and development trends of hydrogen technologies
Authors: Egorov A N , Shaituro M I , Moskalenko A B 
Published: March 2023

Abstract
The article analyzes the current state of research and development in the field of production, storage and use of hydrogen fuel. It was revealed that the most environmentally friendly method is the hydrogen production by electrolysis based on nuclear power. At the same time, in Russia, the development of hydrogen energy is a priority in the energy sector in general and nuclear energy in particular. Specific investment in electrolyzers with a solid polymer membrane is about 3100-2050 $/kW. By 2030, the cost is predicted to be $950/kW and $740/kW for electrolysis with proton-exchange and alkaline electrolyte, respectively. To store hydrogen, research is being carried out mainly on the metal hydride method, as well as gaseous compressed in special high-strength composite tanks under pressure up to 100 MPa and in large-volume underground tanks. The use of hydrogen fuel for power generation is planned mainly on the basis of fuel cells and micro gas turbines. The average cost of a power plant based on solid oxide fuel cells in 2020 amounted to 1720-1430 $/kW. By 2035 and 2050, $960/kW and $770/kW respectively are predicted. A promising area of development in the field of fuel cells is reversible fuel cells.
On the balance between the preservation of natural complexes and the intensity of recreational and tourist activity (by the example of natural monuments of regional importance in the Samara Region, Russia)
Authors: Ilyina V N , Mitroshenkova A E , Kozlovskaya O V , Kazantsev I V , Belyaeva Yu V 
Published: March 2023

Abstract
The article presents the authors’ expert opinion on the use of specially protected natural areas in the rank of natural monuments of regional importance in the Samara Region (Russia) as recreational and tourist sites. The absence of the necessary organization and regulation of tourist and recreational activities in most areas, spontaneity and mass recreation, and as a consequence, the loss of the natural characteristics of some natural complexes is emphasized here. In the course of work, methods of biodiversity assessment were used and the current state of ecosystems of 7 protected areas was determined.
Cultivation of fodder beans at the Zarechny state farm during the development of virgin lands in Kazakhstan
Authors: Mazhitova Zh S , Khassenova Zh O , Issayev A U 
Published: March 2023

Abstract
The article deals with the beginning of virgin lands development in Kazakhstan in the 1950s. In those years there was an acute shortage of fodder crops, as vast areas of land were given to grain crops. Since the traditions of legume and fodder crops cultivation were forgotten, the specialists of the Zarechny state farm had to apply new methods to solve fodder problems under difficult conditions. The authors came to the conclusion that during the experiments, the specialists of the state farm determined the best way of sowing forage beans by means of square-breeding sowing of a mixture of corn and beans. The chosen method solved the problem of fodder for cattle to a certain extent, affecting the productivity of the dairy herd and its weight gain.
Improving the efficiency of creating a mole irrigation system in the Lower Volga region
Authors: Khodiakov E A , Milovanov S G , Bondarenko K V 
Published: March 2023

Abstract
The article presents the results of research in the Lower Volga region on the development of working bodies for the installation of mole sprinklers in the soil (soil pipes for supplying water to plants). This method of irrigation, as the main type of subsoil irrigation of agricultural crops, is used in this region for the first time. In field experiments, 3 options for the design of expanders were studied, as the main elements of molehills for the formation of mole drains. These were expanders combining a cone and a cylinder (cone-cylindrical); truncated cone and paraboloid (cone-parabolic form) and vice versa, paraboloid and truncated cone (parabolic form). Each form differed by 3-4 lengths of the main part of the body and diameters. The conducted studies showed that among the three considered forms of expanders, the cone-parabolic one turned out to be the most effective, since the degree of safety of the molehills here was the highest. With a cutting depth of 0.45 … 0.50 m, the degree of shedding of the walls decreased with an increase in the diameter of molehills more than 50 mm, reaching the best results for mole irrigators with a diameter of 70 mm. Comparison of different lengths showed that molehills are formed most effectively when using 380 mm long expanders. The results obtained will be used in 2023. to create an effective mole irrigation system for technical (on the example of cotton) and leguminous crops (on the example of soybeans).
Problems of digital transformation in agriculture and instruments of state support
Authors: Beksultanova A I , Dzhankhotova P M , Shardan S K 
Published: March 2023

Abstract
The article systematizes global trends in the spread of digital technologies in the field of agriculture. Quantitative estimates of the parameters of the development of digital technologies in agriculture in the period 2019-2021 are presented on the basis of data from the federal statistical observation, as well as monitoring of the digital maturity. The purpose of this article is to identify problematic issues of the introduction of digital technologies in agriculture in Russia, to show the current situation for the introduction and use of digital technologies in agriculture, as well as to give recommendations on measures of state policy of digital transformation of agriculture in the current conditions.
Condition of pine and larch forests adjacent to the reservoir within the Sayano-Shushensky Nature Reserve
Authors: Tatarintsev A I , Mikhaylov P V , Demidko D A , Kulakov S S , Melnichenko N P 
Published: March 2023

Abstract
Forests cover 60% of the Sayano-Shushensky Nature Reserve, 48% of which are larch and pine stands. The purpose of the research was to assess condition of Larix sibirica Ledeb. and Pinus sylvestris L. forests adjacent to the reservoir within the reserve. We conducted forest pathological inspection (for each species on four research plots), an integral assessment of the stands condition, macroscopic diagnostics and disease manifestations indicators estimation and studied model trees affected by xylophagous insects. Studied stands ranged from sustainable to ones with disturbed sustainability and their health status ranged from healthy to varying degrees of weakening. One of the main factors weakening forest stands were ground fires, leading to increased mortality of small-diameter trees that are less resistant to heat stress (most typical of P. sylvestris). Medium and large diameter trees post-fire mortality in L. sibirica forest stands was due to the Zeiraphera griseana feeding, and in relatively flat coastal areas due to repeating flooding. The presence of groups of trees dying from the top down were observed in pine forests growing on thin soils most likely due to an imbalance between the amount of required and available soil moisture. Diseases were not common and did not have a significant impact on the forest stands. Potentially harmful are the following diseases: in larch forests - European larch canker (pathogen - Lachnellula willkommii), in pine forests - Scots pine blister rust (pathogen - Cronartium pini). Xylophagous insects (dominated by Ips acuminatus) had an increased abundance and fed on dying trees in pine forests weakened after fires.
The potential of unclaimed forest resources of the Krasnoyarsk Territory and the prospects for their use
Authors: Dolmatov S N , Pryanichnikova A V , Tikhonov E A , Zagidullin R R , Sabitov L S , Yumagulova V M , Sokolova VA 
Published: March 2023

Abstract
The timber industry is one of the oldest industries in Russia, associated with the harvesting and processing of wood. It is responsible for the stock of wood, its removal, primary processing and waste disposal. On the territory of the country there is 1/4 of all the world’s timber reserves, the volume of timber harvesting is estimated at hundreds of millions of cubic meters. An integral part of the logging process is the generation of waste, the volume of which is directly related to the volume of logging operations. Every year in the Russian Federation, 35.5 million m³ of wood waste is generated, which worsens the ecological situation. Forest fires and insect pests are also one of the main causes of the weakening and death of forests. Areas with abandoned wood, affected plantings require priority development, and low-quality wood should be recycled to obtain recyclable materials. The introduction of resource-saving, environmentally friendly and efficient technology, which provides for the processing of waste and the use of secondary raw materials, will help minimize the negative impact of unclaimed wood on the environment.