bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhancing MPI remote memory access model for distributed-memory systems through one-sided broadcast implementation
Authors: Abuelsoud M M , Kogutenko A A , Naveen  
Published: February 2024

Abstract
Efficiently processing vast and expanding data volumes is a pressing challenge. Traditional high-performance computers, utilizing distributed-memory architecture and a message-passing model, grapple with synchronization issues, hampering their ability to keep up with the growing demands. Remote Memory Access (RMA), often referred to as one-sided MPI communications, offers a solution by allowing a process to directly access another process’s memory, eliminating the need for message exchange and significantly boosting performance. Unfortunately, the existing MPI RMA standard lacks a collective operation interface, limiting efficiency. To overcome this constraint, we introduce an algorithm design that enables efficient parallelizable collective operations within the RMA framework. Our study focuses primarily on the advantages of collective operations, using the broadcast algorithm as a case study. Our implementations surpass traditional methods, highlighting the promising potential of this technique, as indicated by initial performance tests.
Method for changing the redundancy of sequential concatenated code
Authors: Sidorenko Alexander A 
Published: February 2024

Abstract
During the operation of information transmission systems errors occur in the transmitted data due to the influence of various negative factors. To correct errors the codes are currently used that can withstand both single and multiple errors. From the point of view of the ability to correct multiple errors, concatenated codes are highly efficient. When constructing a sequential concatenated code, coding is carried out first by the external, then by the internal code. A significant disadvantage of such coding is a significant increase in redundancy. It is proposed to regulate redundancy by encoding with the internal code only a certain part of the bits from the output of the external code encoder. The study showed the effectiveness of this method, which made it possible to change the parameters of the cascade code within a wide range. A method was proposed and tested to increase the corrective ability of selective coding by multiplying symbols decoded by an external code by coefficients that are different for symbols that have and have not been encoded by an internal code. Decoding of the external code was carried out according to the Viterbi algorithm. The performance of the proposed method has been confirmed experimentally.
On the issue of designing and creation of a composite grinding wheels of increased productivity for rails treatment
Authors: Maksimov I S , Galanskiy S A , Zolkin A L , Bogdanov M.R. , Matvievskaya T B 
Published: February 2024

Abstract
The article discusses the technological aspects of the development and design of composite modified wheels used in the mechanical treatment of railway rails. It allows to increase the productivity of treatment and tool durability. An increase in the physical and mechanical features of the shard of abrasive wheels can be achieved by modifying the binder component in the composition of the ceramic charge mixture with a nanomodifier such as carbon tubes. As a result of the modification of the abrasive composition of the charge mixture, it was possible to achieve an effective performance of railway rails treatment without a significant loss in the durability of the composite grinding wheel.
Registration of melting temperature at phase boundaries in melting powder mixtures
Authors: Smykova Polina , Ishkov Aleksey , Katasonov Alexander , Dzjasheev Abdul-Mudalif , Sokolova Viktoriia , Zagidullin Ramil , Akhmetshin Stanislav 
Published: February 2024

Abstract
An integral constituent of the induction surfacing process for parts hardening pertains to the thermal treatment of rigid alloy particulates and the flux contained within the surfacing amalgam. This scholarly exposition delineates the outcomes of a comprehensive investigation, oriented towards the quantification and simulation of thermal gradients at interphase boundaries within intricate amalgamations of melting and thermosetting powdery substrates. In order to monitor the thermal dynamics during induction surfacing, the application of the CA-microthermocouple methodology and the thermal indication technique utilizing self-propagating SHS-process compositions is posited. The study encompasses both computational simulations and the resolution of the unsteady-state heat conduction problem within the chosen model of composite contacting materials. The devised methodologies for the intricate tracking of thermal profiles during induction surfacing offer the capability to ascertain the temperatures at which the surfacing amalgam and its individual constituents undergo liquefaction, in conjunction with the temperature gradient exhibited by the surface of the targeted component. This facet holds marked significance in the context of optimizing the hardening regimen and ensuring the requisite attributes of the amalgamated materials post-fusion. The outcomes of this research bear practical relevance in industrial applications, wherein enhancements to the caliber and dependability of hardened components are sought, simultaneously facilitating the curtailment of production overheads.
Composite biofilm chitosan-microcrystalline cellulose for tomato preservation
Authors: Doan Trang Tran Y , Dzung Ha Thi , Huong Ta Thi , Quynh Pham Huong 
Published: February 2024

Abstract
The demand for packaging has caused a surge in non-biodegradable plastic waste. To tackle this issue, biofilms provide a safe and effective alternative for packaging and preservation. This research focused on combining chitosan and microcrystalline cellulose (MCC) to produce composite biofilms to preserve fresh fruits. The study involved adding varying quantities of MCC, ranging from 0g to 11g, to chitosan using a glycerol plasticizer. The results showed that adding MCC reduced the adhesion of the chitosan-based film, resulting in a more intact film. The surface morphology of the film showed uniform dispersion of MCC particles. The water adsorption and solubility of the MCC-added films increased while biodegradability decreased. The best biofilm for preservation application was the chitosan film supplemented with 3g of MCC. This film helped limit weight loss, vitamin C content, total acid content, and soluble solids loss in tomatoes during storage. Essentially, the chitosan-MCC film helped to reduce water evaporation, respiration, metabolism with the external environment, and penetration of microorganisms on tomatoes, thus extending their shelf life.
Localized modes in platinum aluminides
Authors: Cherednichenko A I , Bebikhov Y V , Semenov A S , Starostenkov M D , Korznikova E A , Rakhmatullina Z G , Zakharov P V 
Published: February 2024

Abstract
Platinum aluminides have the prospect of being used as both functional and structural materials for a range of scientific and technical tasks. They possess unique properties that make them effective catalysts. The dynamics of the crystal lattice play an important role in the manifestation of these properties. In this study, an analysis of the density of phonon states of crystals and the possibility of the existence of localized lattice vibrations in Al and Pt alloys is conducted using atomistic modeling. The following compounds are considered: AlPt, Al2Pt, Al3Pt, AlPt2, Al3Pt5, AlPt3 (four types of lattices). The calculated phonon spectra allow for the assessment of the possibility of the existence of nonlinear localized modes in the forbidden zone of the spectrum, if it is present. It is shown that a number of crystals within the framework of the considered formalism and interatomic potential can have a forbidden zone. This condition, together with the nonlinearity of the bonds, ensures the existence of highly-amplitude localized modes in the following compounds: AlPt3, AlPt3(1), AlPt3(2), AlPt3(3). It is also established that in the Al3Pt5 alloy, the existence of prolonged high-amplitude excitations on the Al atom is possible.
Memristor effect in an amorphous garnet ferrite film Y1.8Bi1.2Fe3.5Ga1.5O12
Authors: Sitnikov M N , Kharkov A M , Zelenov F V , Nikitinskiy O S , Voronova E G , Cheremnykh N A 
Published: February 2024

Abstract
Amorphous films of yttrium bismuth ferrite garnet were obtained by thermal evaporation. Morphological and elemental analysis was carried out using an electron microscope. The IR spectra of the precursors and the amorphous film were measured. Measurements of theI-U characteristics were carried out in different electric fields and in the temperature range of 80-450K. The hysteresis of the I-U characteristic and the difference between high-resistance and low-resistance resistance by an order of magnitude at voltages of hundreds of microvolts were found.
Aluminizing of the EP33 alloy by hot-dipping
Authors: Kulevich V P , Bogdanov A I , Shmorgun V G 
Published: February 2024

Abstract
The features of hot-dip aluminizing of the EP33 alloy were studied and the structure transformation of the resulting coating during high-temperature treatment was investigated. Aluminizing the EP33 alloy leads to the formation of a continuous 120 μm thick coating, consisting of an aluminum matrix with the Cr2Al13 intermetallic compound inclusions and a continuous layer of FeAl3 intermetallic compound along the boundary with the substrate. Heat treatment of the aluminized alloy at 1100 °C ensures the formation of a layered coating structure. The phase composition of the coating from the surface to the substrate changes in the following sequence: FeAl(Ni,Cr,Ti,Mo) → FeAl(Ni,Cr,Ti,Mo)+Ni(Fe,Cr,Al,Ti,Mo) → FeAl(Ni,Cr,Ti,Mo)+Fe(Al,Ni,Cr,Ti,Mo).
Improving the physical, mechanical and operational characteristics of cast internal combustion engine pistons made of aluminum alloy using secondary charge
Authors: Kovalev I V , Kovalev D I , Voroshilova A A , Gofman P M , Yu Sergeev I , Efa S G 
Published: February 2024

Abstract
The article is devoted to improving the physical, mechanical and operational characteristics of cast internal combustion engine pistons made of aluminum alloy using secondary charge. The advantage of the proposed approach is that these parts are manufactured from any aluminum alloy using the remelting of failed internal combustion engine parts of the same name. The paper shows that while using a secondary charge in the form of remelting failed parts of the same name, the quality of cast products not only does not deteriorate, but, on the contrary, their physical and mechanical characteristics even increase. It should be noted that the high density of the alloy obtained from remelting failed pistons and the high degree of its modification confirmed the authors’ assumption that in this case refining and modification operations can be avoided. The presented approach using the remelting of failed parts makes it possible not only to save fresh charge materials, but also to preserve the chemical composition of the primary parts, and, consequently, the level of their physical, mechanical and operational characteristics.
Methods for increasing the cavitation and solid particle erosion resistance of 20GL and 30L steels based on their surface modification
Authors: Mednikov A F , Tkhabisimov A B , Zilova O S 
Published: February 2024

Abstract
The article presents the results of studies of cavitation and solid particle erosion resistance of samples of 20GL and 30L steels with various surface modification options based on nitriding and boriding processes. Tests for cavitation resistance were carried out according to the ASTM G134-17, and for solid particle erosion resistance - according to the ASTM G76-13. It was revealed that to increase wear resistance, the depth of modification of the considered steels should be at least 80 microns. Based on the totality of cavitation and solid particle erosion studies carried out, the best option for surface modification for 20GL steel is boriding, and for 30L steel nitriding.
Technology for obtaining VO2 films from the gas phase during thermal decomposition
Authors: Sharipov M Z , Urinov J , Kilichov J , Khadjayev M , Normakhmadov B 
Published: February 2024

Abstract
The paper considers the process of obtaining films of vanadium dioxide by the method of deposition of inorganic coatings and films from the vapor phase during the thermal decomposition of organometallic compounds. In recent years, there has been a growing interest in the practical use of organometallic compounds. This has led to the development of many devices that include various vapor deposition techniques. This technology is currently being used as the latest technology. The design of the technological installation for pyrometric film deposition is presented and the principle of operation is given. In the course of the study, film samples were obtained and experimental work was carried out. The results obtained are presented in the form of graphs.
Horizontal tank strength analysis considering nozzle loads and horizontal deviations
Authors: Zakirnichnaya M M , Rubtsov A V , Krivenkov I I , Ilyasov V R , Mustafina E R 
Published: February 2024

Abstract
When assessing the reliable and safe operation of technological equipment, and in particular, capacitive-type equipment, a fairly diverse number of methods are used. However, all current procedures do not sufficiently take into account the impact of certain factors on the forming stressed-deformed state of the object. Usually, when assessing the actual technical condition of an object, the level of defect of the object is determined, and appropriate calculations are carried out according to the criterion of the dominant damage mechanism. A significant impact on the stressed-deformed state of the shell structure can be exerted by the level of loads on process nozzles from the connection of process pipelines, as well as possible deviations during installation work. One of these deviations may be a deviation from the horizontal of the housing when installing supports on the foundation. Moreover, the combination of the action of the above factors can have a determining negative effect on the strength, and, accordingly, the operational reliability of the technical device. In the modern world, technological progress does not stand still and the consequence of this is the development of a fairly extensive number of software products that allow you to simulate possible individual scenarios for the development of unfavorable processes and predict the behavior of the object under the conditions under consideration. In this work, studies are carried out on the strength analysis of the horizontal tank, taking into account various values of loads on the nozzle of the body diameter, as well as taking into account the deviation of the tank body from horizontal.
Application of spring energy accumulators in forging and pressing equipment
Authors: Barashov N N , Shanygin S V , Kananadze S S 
Published: February 2024

Abstract
The development of forging and stamping production requires automation of various pressure treatment equipment. An important feature of the pressure treatment mechanisms is their inherent unsteady mode of operation, consisting of often alternating acceleration and deceleration, so the proportion of inertial loads is quite large. Such mechanisms are considered to be among the least efficient in terms of energy consumption parameters The low efficiency of the known designs is caused by the inability to exclude the influence of inertial forces on energy consumption and the speed of the equipment. The use of damping devices is not able to solve this problem, since they are designed to absorb a certain amount of energy and when the number of strokes per minute changes, they can cause an increase in dynamic loads.
Determination of optimal 3D printing modes for composite parts for reaching the set design-engineering parameters
Authors: Markanov I D , Vdovin R A , Goncharov E S , Firsin A O 
Published: February 2024

Abstract
This paper discusses properties of various 3D printing materials, namely, plastics, including polyamides, along with composite or engineering plastics with inclusions of carbon fiber and fiberglass. We selected an optimal sample printing mode and carried out experiments, following which we determined maximal loads for test composite materials, and linear shrinkage. As the result, we determined an optimal 3D printing mode for various structures of composite material parts with the purpose to reach the set design-engineering parameters.
Ultrasonic treatment for waste-water cleaning
Authors: Shakura V A , Titov G A , Morozova E A 
Published: February 2024

Abstract
Purification of liquids from undesirable admixtures and malignant bacteria is one of the most important problems of the mankind. It is especially sharply appeared at the cleaning of sewage. At present in the most part of the world (in densely populated territories) there is a lack of pure fresh water. Industrial and domestic waste waters negatively influence on the ecological situation in stretches of fresh water. It is evident, that it is caused by the large quantity of insufficiently cleaned sewage, which constantly comes to rivers and ponds in the connection with functioning of the industrial enterprises and households. The presence of admixtures and malignant bacteria in different liquid food (beverages, acetic seasonings) decreases their consumer properties and can be harmful for people health. So there is no doubt of the development new methods of liquid purification. The article is devoted to the analysis of the problem of purification of domestic and industrial waters from pathogenic microorganisms, undesirable admixtures and malignant bacterium. It is considered existing industrial solutions and their disadvantages. The theoretical research of optimum ultrasonic influence modes providing maximum diffusion coefficient was performed and example of US apparatus was presented.
Modeling of radio monitoring systems on signals of short-wavelength adaptive radio communication systems
Authors: Khotamov A , Amonov A K , Nurmurodov J , Nizamov A , Khadjayev M , Xikmatov X X 
Published: February 2024

Abstract
The article describes the structure of a model that allows to evaluate the effectiveness of the radio monitoring system on the signals of flexible shortwave radio communication systems in adverse conditions of external interference. This model is characterized by the ability of modern short-range communication systems to establish radio communication and automate the processes of guaranteed transmission of information, adapt to the noise situation in the shortwave range, the organization of analog and digital communication networks.
Modeling non-linear loads for low-voltage electric grids
Authors: Platonova E V , Toropov A S , Kolovsky A V , Yu Shcherbachevich V 
Published: February 2024

Abstract
The authors performed the computer modeling of a power distribution grid section comprising a significant non-linear and asymmetric household and office load. The modeling was performed using the SimInTech software. The developed model was used to study the impacts that non-linear single-phase consumers (e.g. computers, printers, TV sets, microwave ovens, etc) have on the distortion of current and voltage curves in the grid and the formation of current in the transformer neutral. The authors demonstrate the dependency between the higher harmonic values of the phase and transformer neutral currents and the total non-linear consumer power, their share in the overall power substation load, and the distribution of non-linear consumer load across the substation feeders. To reduce the level of harmonic current components, the authors suggest using narrow-band passive higher harmonic filters. A computer model was developed for the simultaneous operation of a single-phase non-linear load and a four-link filter compensating device that comprises the filters set for the frequencies of the third, fifth, seventh, and ninth harmonics. The analysis of the non-sinusoidal operating modes of the grids with -harmonic filters connected showed that there is practically no current in the neutral while the distortion factors of the phase currents and grid voltage curves are at the minimum.
The comparative analysis of different two-wavelength laser altimeter versions for forest monitoring
Authors: Belov M L , Belov A M , Gorodnichev V A , Alkov S V , Shkarupilo A A 
Published: February 2024

Abstract
This study presents a capability analysis of the various options for the technical implementation of a two-wavelength laser altimeter for monitoring forests. The results of woodlands pieces identification statistical simulation for a neuronic net using experimentally measured spectral reflectance are presented. It is shown that the neuronic net provides a strong probability of correct identification when using information about the reflectivity and the height of woodlands pieces. Two wavelengths 532 and 1064 nm and the neuronic provide the probability of correct identification of green broad-leaved and needle-leaved trees understory, wetlands and ground vegetation of greater than 0.89 and the misidentification probability of lower than 0.055.
The influence of power on the intensity of working fluid heating in the hydraulic drive
Authors: Andreychikov I V , Ionova V A , Kolpakov I G , Sergeenkov A D , Troyakov K V 
Published: February 2024

Abstract
This paper discusses the influence of power on the intensity of working fluid heating in the hydraulic drive. The work considers methods and methods of maintaining thermal conditions in the hydraulic drive. Thermal balance scheme in hydraulic drive of self-propelled machines is considered. Calculation is also made for hydraulic drive of drilling machine. Based on the results of the calculation, a graph was drawn on the dependence of the intensity of pre-start heating of the working fluid on the power developed by the temperature control device.
The first plasma in a newly constructed linear device for plasma turbulence research
Authors: Yu Y. , Xiao C.Y. , Liu H. , Wang Z.H. , Zhou Y.X. , Zhao G.Y. , Xu M. , Nie L. , Yuan Z.H. , Zheng P.F. 
Published: February 2024

Abstract
Parameters of the first plasma in a newly built middle-size
multi-functional linear plasma device named LEAD (Linear
Experimental Advanced Device) were presented. The LEAD device is
built to serve as a multi-purpose laboratory plasma experiment
platform for various topics, including plasma turbulence,
plasma-material interaction, and other fundamental plasma
physics. This device is also useful for testing new diagnostic
systems. It will be complementary to the HL-2A/HL-3 tokamaks in
Southwestern Institute of Physics. The plasma was generated by a
large-area helicon plasma source with a multi-ring antenna driven by
a 13.56 MHz, 5 kW radio frequency (RF) power source. Argon plasma
parameters were measured by a Langmuir probe in different external
parameters including RF power, axial magnetic field, and neutral
pressure. The threshold power for helicon mode transition is
empirically confirmed to be 180 W. Steady-state argon plasma with a
density of higher than 1019 m-3 was generated when RF
power reached 3 kW. Plasma parameters are crucially influenced by
the axial magnetic field. With a weak magnetic field, the radial
density profile is Gaussian-like. However, with a stronger magnetic
field, shear and reversion of azimuthal rotation velocity reversion
appear, resulting in a hollow-shaped density profile. When further
increasing the magnetic field, plasma density
decreases. Steady-state plasma discharges were achieved under a wide
range of argon neutral pressure from 0.1 Pa to over 10 Pa. With
increasing neutral pressure, plasma density increases to its maximum
at 2.5 Pa and then drops, while electron temperature drops
monotonically.