bluuebunny/crossref_metadata_2025_split huggingface dataset:
Strength test of the industrial building’s load-bearing structures
Authors: Sazonova S A , Nikolenko S D , Zyazina T V , Chernyshova E V , Kazbanova I M 
Published: December 2022

Abstract
Experimental studies were carried out in the molding shop. Tests were carried out for brickwork materials of enclosing walls by the shock pulse method. The compressive strength grades of ceramic brick fences and cement-sand mortar were determined experimentally. When testing concrete, a non-destructive strength control method and the necessary devices were used. The concrete class was determined by compressive strength in reinforced concrete columns of the building, in reinforced concrete beams of the coating and in reinforced concrete slabs of the coating. According to the proposed methodology, verification calculations were carried out. The verification calculations showed sufficient bearing capacity of the columns and foundations of the workshop building and the coating beams for the full design load. A calibration calculation of the workshop frame was also performed, which showed sufficient strength of the entire load-bearing structures of an industrial building. The proposed methodology can be used for testing similar building materials and objects.
Statistical substantiation of the quality of training metrologists in the system of additional professional education
Authors: Simkin A Z , Mozhaeva T P , Proskurin A S , Tsareva G V 
Published: December 2022

Abstract
The paper discusses the basics to ensure the quality of educational parameters of training engineering specialists, including the field of metrology, within additional professional education. The parameters of the educational quality that determine the effectiveness of this activity are identified. The emphasis is placed on the educational process parameter that has a direct impact on the quality of training students within additional professional educational programs, that is educational technology used in educational activities. Scientific papers are analyzed in the field of identifying an effective educational technology that ensures the quality of training students among other equal conditions. The problems are studied that are related to the choice to implement an effective educational technology in additional professional educational program. The relevance of statistical substantiation to apply an educational technology in educational activities is proved. The procedure for substantiating the quality (effectiveness) of the educational technology based on the use of statistical methods is proposed. The expediency of using statistical tools to confirm the quality of educational technology used in educational activities is argued.
Development and improvement of technical means of protecting people from the effects of atmospheric electricity
Authors: Korolev D S , Vytovtov A V , Konchakov S A , Kargashilov D V , Odnolko A A 
Published: December 2022

Abstract
The article rises the current question about the need to develop a fire safety system of explosive objects (buildings, structures, buildings, industrial communications), as well as organizing assistance to local self-government bodies in the implementation of primary fire safety measures. The emphasis is placed on a fire prevention system, which includes a lightning protection system designed to protect the countryside and other objects of protection against atmospheric electricity discharges. Therefore, for proper design, control and maintenance of health, it is proposed to apply the original computer program. Which allows an express analysis of lightning protection parameters and make appropriate conclusions.
Icing waveguide strength problem
Authors: Brungardt M V , Kudryavtsev I V , Brungardt A V , Goncharova E A , Li O A 
Published: December 2022

Abstract
In this paper, we conduct research of the waveguide strength under icing. Icing is assumed to be uniform along the perimeter and length of the waveguide, so ice deposits is considered in the form of an equivalent increase in the density of the structure. As a result, the icing problem is reduced to the problem of gravitational bending of the waveguide. Waveguide has a thin-walled rectangular cross-section; therefore, a solution demand using the theory of plate. We model the waveguide in the form of 4 plates that made it possible to obtain an analytical solution to the problem according to the plate theory. Also, it makes possible to identify the features of the stress distribution both in length and in the height of cross-section of the waveguide and refine the results in comparison with the theory of beams. The results of analytical calculation according to the developed method is compared with the data obtained according to beam theory, which show good convergence with the data obtained according to beam theory, which showed good convergence.
Tribological properties of doped zirconium dioxide crystals under water lubrication
Authors: Alisin Valery 
Published: December 2022

Abstract
The issues of a ceramic plain bearing performance under friction in the water are discussed in this article. Bearing bushings made from nanostructured partially stabilized zirconium dioxide crystals doped with rare earth elements under friction on steel and ceramic shafts are investigated. The statement about the possibility of using zirconium ceramic materials in bearings of multistage submersible centrifugal pumps for oil production is substantiated. The efficiency of alloying crystals to improve crack resistance is analyzed. Particular attention is paid to the tribological properties of the bearing when using steel and ceramic shafts. The results of comparative tribological tests of samples of the studied materials, bench tests of full-scale bearing bushings carried out under water and dry friction are presented. Based on the study, it is proposed to make bushings from a zirconium dioxide crystal for working on a steel shaft. It has been established that this plain bearing can withstand the emergency mode of friction under water or dry friction for half an hour.
Influence of variants of grid bars and spiky cylinders on the cleaning effect of cotton on small waste
Authors: Rajabov Ozod , Shodiev Ziyodullo , Gapporova Mastura , Yokubov Mukriddin , Ziyodullaeva Khonzoda 
Published: December 2022

Abstract
The article examines the use of grid bars and spiky cylinders in a small-grained cotton ginning machine. The results of the experimental tests were also compared with the results obtained in the existing structure, and the data are presented in the tables. When the recommended grid bars were installed on a hexagon (edge length 70.8 mm), the cleaning effect of the machine increased by 2.7%, and after cleaning, the amount of small waste in the raw cotton decreased to 0.07%.
Advanced tendencies and practically oriented approach to training specialists in applied physics
Authors: Alexandrov A A , Borisov A I 
Published: December 2022

Abstract
The existing system of training specialists in the field of applied physics in domestic universities doesn’t allow to fully meet the needs of employers. One of the main drawbacks of the educational process in higher education institution in training future engineers is insufficient use of practice-oriented educational technologies, well-organized internships and independent work of students, real design. It does not give students an opportunity to demonstrate the competences they have acquired while studying individual disciplines of the educational program. According to experts, one of the ways to improve the quality of specialists’ training, capable of eliminating this contradiction to a certain extent, is the introduction and wider spread of practice-oriented educational technologies in engineering universities. The objective of the applied physics course is to develop skills in applying the provisions of fundamental physics to competent scientific analysis of situations which an engineer has to deal with when creating new equipment and new technologies, as well as to develop students’ natural-science worldview and familiarize them with the history of physics development and its main discoveries. As a result of mastering the course of applied physics the student should learn the basic physical phenomena and basic laws of physics; limits of their applicability, application of laws in the most important practical applications; become familiar with the basic physical quantities, know their definition, meaning, methods and units of their measurement; imagine fundamental physical experiments and their role in the development of science; know the purpose and operating principles of the most important physical instruments.
Study of a method for controlling the structural integrity of monolithic polycarbonate under cyclic loads
Authors: Bobina E A , Danilaev M P , Kuklin V A 
Published: December 2022

Abstract
The study of a method for controlling the structural integrity of monolithic polycarbonate under cyclic loads is presented in the article. In particular, the influence of external cyclic loads on crack formation in polycarbonate was determined. The carried out experimental studies have shown the structural changes in polycarbonate (the appearance of microdefects) can be detected by a decrease in the level of the piezoelectric voltage amplitude U compared to the initial level by ∼25% for more than 104 load cycles.
Modeling the properties of multilayer heat-reflecting screens taking into account the uncertainty of structural parameters
Authors: Storozhev V I , Bolnokin V E , Mutin D I , Sorokin S A , Minh Hai Duong 
Published: December 2022

Abstract
The article is devoted to the study of parametric properties of multilayer heat-reflecting screens. Special attention is paid to the parameters of shielding and heat flow absorption. The study, its numerical and analytical techniques ensure that the fuzzy input situation is taken into account. The fuzziness is generated by the variance of both the values of geometric parameters and the actual values of structural elements. The proposed analytical and numerical research techniques are applicable in a wide range of productions of thermal protective products – for the energy industry, radio electronics, aerospace instrumentation, production of building structural elements. The theory of fuzzy sets is actively applied in terms of the heuristic principle of expansion. It is the basis for regular versions of the presented models. The underlying calculations are based on fuzzy numbers that represent exogenous parameters.
Preacetylation of wood filler in composite materials production
Authors: Safin R R , Prokopiev A A , Salimgaraeva R V 
Published: December 2022

Abstract
The increasing swelling pressure of wood filler, occurring during the use of a composite material, leads to the formation of internal microcracks, therefore, reducing the hygroscopicity of the wood filler is an urgent task. This paper considers the wood filler preacetylation technology in wood-polymer composite materials production. Wood particles were acetylated by soaking them in acetic anhydride, followed by heating in a vacuum drying cabinet at 120°C for 40, 180, and 360 minutes. Polylactide in various binder-modified wood filler ratios was used as a polymer matrix in wood-polymer composite samples. The resulting samples were examined for moisture and water absorption. It was found that with a maximum treatment time of 360 minutes moisture and water absorption of samples with 40% wood filler content did not exceed those of a composite with 20% unmodified wood filler content, which proves the effectiveness of acetylation. The results of the research conducted allow expanding the scope of use of additive manufacturing products.
Formation of silicated layer of austenitic pipe steel with different pipe sizes
Authors: Rubtsov A V , Shermatov D N , Khabibullin A I , Yu Strokina U , Batyrgareev T D 
Published: December 2022

Abstract
Tubular furnaces of hazardous production facilities are unique technical devices, and serve for open fire heating of various process media to relatively high temperatures. Some of the furnaces, such as pyrolysis furnaces, hydrogen conversions are also reactors that serve to decompose the hydrocarbon feedstock into separate components. The most important element of the structure is a tubular coil. The effect of high temperatures and working media on the coil metal inevitably leads to metal degradation by forming various defects, changing the structure and mechanical properties for the worse. One of the most unfavorable moments is considered saturation of the surface layers of the metal with carbon or another - carburization of the metal. When the metal is carburized, its embrittlement occurs and the probability of brittle destruction increases. All this can lead to frequent shutdown of furnaces for repairs and significant costs. One way to contain the active diffusion of carbon into the metal may be to silicate the surface of the coil elements using different silicating mixtures, since silicon can effectively delay carbon incorporation. In this work, studies are carried out on the peculiarities of the formation of a silicated layer in fragments of pipes with dimensions of 160x6 mm, 32x2 mm, 57x4 mm made of steel 08Kh18N10T depending on the holding time in the silicating mixture.
Prevention of local corrosion of aluminum alloy pontoons in steel tanks
Authors: Yu Pechenkina M , Nasibullina O A 
Published: December 2022

Abstract
Over the years of existence of the oil and gas industry, increasing the efficiency of equipment at production facilities places increasing demands on operational reliability and durability. The use of aluminum alloys is due to a large range of its features and properties, one of which is the combination of high strength in combination with low density, sufficient corrosion resistance, good moulding ability by casting, pressure and cutting, the possibility of using aluminum parts in all kinds of structures by welding, soldering and other methods. It is important to bear in mind that aluminium alloys do not require regular corrosion coating during operation. It is all about the finest and extremely strong oxide film (0.00001 mm), which forms a reliable adhesion to the metal.
Features of siliconizing of pipe steel X12CrNi25-20 with various term of operation in the conditions of the reactionary furnace
Authors: Rubtsov A V , Shermatov D N , Seitzhaparov B S , Yu Strokina U , Konkova D L 
Published: December 2022

Abstract
Most refinery and petrochemical reaction furnaces are operated under harsh conditions characterized by high pressures, temperature, and aggressiveness of the process environment. The high temperature and features of the heated raw material contribute to the formation and deposition of coke on the surface of the furnace pipes, which through adhesion and diffusion phenomena has a negative effect and reduces the operational reliability of the entire furnace, causing such a negative phenomenon as carburization of the metal. Carburization contributes to a significant limitation of the ductility of the metal and increases brittleness, which leads to the formation of various unacceptable defects, in particular the formation of brittle cracks. The occurrence of defects of this type inevitably leads to the depressurization of the coil and, as a result, to the occurrence of emergency situations and emergency shutdown for repair. The problem of carburizing a metal can help solve the silicization of its surface layers, since silicon can serve as an effective protection for active saturation of the metal with carbon. In this regard, a relevant topic is the study of the features of the formation of a modified silicon-based surface layer in the coil tubes of a reaction furnace of steel X12CrNi25-20 with a different operating life in order to increase the reliability and reliability of the furnace during operation.
Electrical properties and Raman spectra in HoxMn1-xS solid solution
Authors: Sitnikov M N , Kharkov A M , Abdelbaki H , Cheremnykh N A , Runov R V , Mashkov P P 
Published: December 2022

Abstract
The conductivity of the HoxMn1-xS (0 < x ≤ 0.3) solid solution in the range of temperatures 80 K – 1000 K were measured. Step like temperature dependence and extremum conductivity at high temperature were found. The temperature dependence of Raman spectra in the frequency interval 100 cm−1 – 900 cm−1 in the 300K – 900K range temperature has been investigated in the of HoxMn1-xS solid solutions. Several oscillation modes have been detected. The intensity and frequency shift of temperature fluctuations are determined. A new Raman mode appearing at high temperature T > 660 K was established. The correlation between temperature dependencies of conductivity and frequencies and intensities of Raman modes were established. Raman spectra were explained in terms of impurities octahedral modes.
Investigation of stepped InP(001)<110> surface by the method of low energy ion scattering
Authors: Karimov M K , Kutliev U O , Otabaev M U , Khajieva I A 
Published: December 2022

Abstract
5 keV - energy Ne+ ions are scattered from stepped InP(001)<110> surfaces in grazing incidence. The study of a stepped surface using the ion scattering method is of great interest, since ions are scattered at large angles. For the stepped surface calculated the simple trajectories channeled ions using binary collision approximation method. Calculated energy and angle of ions, which exits from this surface channel. It indicates that at the energy distribution observe intensively peaks, which corresponded to the ions leaved surface channels formed, stepped atoms.
Transformation of the structure and adsorption properties of bentonite during physical and chemical treatment
Authors: Buntin Artem , Agliullin Vadim 
Published: December 2022

Abstract
The paper presents the results of studies of the effect of electromagnetic, ultrasonic and acid treatments on the structure and the adsorption index of alkaline-earth bentonite modified with nanoparticles of silicon oxide and aluminum. Studies have shown that electromagnetic, ultrasonic and acid treatments contribute to an increase in the adsorption capacity of bentonite modified with nanoparticles of silicon oxide by 5, 10, and 25%, respectively. Modification of bentonite with stabilized nanodispersed hydrosols of amorphous silicon oxide (6-10.5 nm) and crystalline boehmite (3.5-4 nm) of 0.1-0.5 wt. % with subsequent ultrasonic and microwave treatments allows to increase its adsorption index for methylene blue and the cation exchange capacity up to 40%. And during the combining with preliminary activation in suspension with sodium carbonate it allows to increase up to 80%. The increase in the adsorption properties of bentonite is due to a double increase in the homogeneity of the structure, dispersion and specific surface area of aluminosilicate particles and transformations of the phase composition. As a result, through the use of advances in the field of nanotechnology, a combining of physical and chemical effects, the technology of modifying natural aluminosilicates based on bentonite has been improved, which makes it possible to significantly increase the adsorption characteristics of materials based on it.
Ceramic materials for friction units operating under vacuum
Authors: Alisin Valery 
Published: December 2022

Abstract
The issues of zirconium dioxide nanostructured crystals application in friction units operating under vacuum are discussed in this article. The effect of alloying crystals with rare-earth elements on crack resistance has been investigated. The optimal amount of alloying elements to achieve the highest crack resistance has been determined. Experiments were carried out on a tribometer of reciprocating motion to determine the antifriction properties of the crystal. The influence of the time of triblogical tests on the change in the coefficient during the sliding of crystals over an alpha titanium alloy is analyzed. The optimal crystal composition for vacuum operation is proposed. Vacuum tests of a bearing consisting of a crystal bush and an alphonated titanium shaft confirmed the functionality of the friction couple. A recommendation is proposed for the application of the studied friction couples in friction units of spacecraft intended for long-term operation in open space.
Ozone treatment of wood filler in polymer building materials
Authors: Safin Ruslan , Mukhametzyanov Shamil , Salimgaraeva Regina 
Published: December 2022

Abstract
This paper deals with wood filler ozone treatment aimed at increasing the adhesion of binders to wood. It describes the processes of thermal and ozone treatment and presents sketches of experimental units. It provides the curves of the results of the study to determine water absorption and strength, proving the feasibility of using this pretreatment method. The proposed two-stage treatment of wood filler is relevant in the production of wood-polymer composites.
Study of osseointegration properties of multilayer coatings with a biodegradable film of flavonoid nanoaggregates
Authors: Krasnikov Alexandr , Krasnikova Ekaterina , Morozova Daria , Spirkina Natalia 
Published: December 2022

Abstract
Characteristics of new implant coating of materials obtained by the method of induction heat treatment and modified by flavonoids nanoaggregates are studied and the prospects for their use in dental animal implantology are presented. It has been established that for a non-toxic biofunctional coating forming on a surface of implantation materials, it is had to apply the following concentrations of substances: propolis - 1.25 mg / 1 ml, polymer - no more than 0.0001%. Research has shown that experimental implants coatings do not inhibit erythropoiesis and leucogenesis. In addition, absence of sharp dispersion in calcium, phosphorus, creatinine and urea level, recovery of primary AST, ALT activity and the minimum values of C-reactive protein in experimental group animals in early term indicate implants have not any toxic effect.
Mathematical model for determining the optimal composition of mortars for restoration of historical monuments
Authors: Tojiev Inomjon , Hamidova Mohigul 
Published: December 2022

Abstract
The work covers the compression strength, tensile bending and adhesion of a modified mortar developed by the authors based on local gypsum for the restoration of the Ismail Samani mausoleum and the Kalyan minaret. It has been shown that the strength of the mortar is sufficient and meets the requirements of existing building codes. The recommended compositions of the modified restoration solutions based on gypsum and their strength indicators have been identified. Compositions of modified restoration solutions that contribute to an increase in their water resistance and durability have been studied. In addition, a graphical analysis of the degree of strength of mixtures has been given and mathematical models have been developed. The optimal compositions of mixtures have been determined using mathematical modeling. Based on the results obtained, conclusions have been drawn.
Hydrogen production and green chemistry
Authors: Sidorenko Alexander , Kutkina Nina , Nazarova Nadezhda , Brykin Veniamin 
Published: December 2022

Abstract
This paper presents a study on the production of hydrogen and “green chemistry”. The introduction introduces the terminology and historical data, followed by the defining principles that describe hydrogen production methods using natural gas, coal, water and biomass as feedstock. Some basics of “green chemistry” are also given. The next section provides an analysis of all hydrogen production methods, the results of the analysis are recorded in a table that allows you to identify the most environmentally friendly solutions. In the conclusion it is stated that the results of the study indicated in the table make it possible to assess the compliance of each of the 13 methods for producing hydrogen with the principles of “green chemistry”, and the assessment and comments do not take into account the economic component of technologies, the main emphasis is on environmental protection.