bluuebunny/crossref_metadata_2025 huggingface dataset:
Palladium-catalyzed indium-mediated reductive aromatic C–H allylation of N-benzylsulfonimides with allyl esters
Authors: Zhang Xue-Ting , Tian Shi-Kai
Published: March 2023

An unprecedented reductive aromatic C–H allylation of benzyl electrophiles with allyl electrophiles has been established through developing the site-selective allylation of N-benzylsulfonimides with allyl esters.
ortho-Functionalization of azobenzenesviahypervalent iodine reagents
Authors: Di Tommaso Ester Maria , Walther Melanie , Staubitz Anne , Olofsson Berit
Published: March 2023

A metal-free synthetic route toortho-functionalized azobenzenesvianovel diaryliodonium salts, which are used to efficiently arylate nucleophiles.
Intermetallic alloy structure–activity descriptors derived from inelastic X-ray scattering
Authors: Bukowski Brandon C. , Purdy Stephen C. , Wegener Evan C. , Wu Zhenwei , Kropf A. Jeremy , Zhang Guanghui , Miller Jeffrey T. , Greeley Jeffrey
Published: March 2023

The d electronic states of Pt3M intermetallic alloys, probed by Resonant Inelastic X-ray scattering and Density Functional Theory, reveal new descriptors for molecular adsorption.
A simulation study on the phase transition behavior of solid nitrogen under extreme conditions
Authors: Qin Han , Zhu Sheng-Hai , Jiao Zhen , Liu Fu-Sheng , Liu Zheng-Tang , Liu Qi-Jun
Published: March 2023

At extremely low temperature, solid nitrogen shows a re-entrant phase transition under continuously increasing pressure.
Promising anode materials for alkali metal ion batteries: a case study on cobalt anti-MXenes
Authors: Banerjee Subhadeep , Narwal Ankita , Reddy Sandeep K , Yamijala Sharma S. R. K. C.
Published: March 2023

Cobalt anti-MXenes are a new class of 2D materials that are promising anode materials for alkali metal ion batteries. They exhibit high specific charge capacities and low migration energy barriers for alkali metal ions.
Efficient seawater desalination in lamellar nanochannel-based boridene filtration membrane
Authors: He Shuxin , Gu Zonglin
Published: March 2023

We employed the molecular dynamics (MD) simulation approach to investigate the desalination performance of the designed boridene lamellar membrane.
Synthesis of rod-like PANI/α-Fe2O3composite catalysts with excellent photo-Fenton catalytic performance
Authors: Liu Shiwei , Wang Xuezhuang , Yan Su , Zeng Jing , Bai Jinshuo , Li Jianxin , Liang Xiaoping
Published: March 2023

Rod-like PANI/α-Fe2O3composite catalysts were synthesized by constructing heterojunctions, which enhanced α-Fe2O3photogenerated carrier separation efficiency and photo-Fenton performance.
A post synthetically modified metal–organic framework as an efficient hydrogen evolution reaction catalyst in all pH conditions
Authors: Mondal Tuhina , Hota Poulami , Sarkar Koushik , Debnath Anup , Shaw Bikash Kumar , Saha Shyamal K
Published: March 2023

Transition-metal-based metal–organic frameworks (MOFs) have received great interest for the development of low cost, platinum-free, non-precious water splitting electrocatalysts for hydrogen generation to resolve the energy crisis.
Panchromatic luminescent D–π–A benzothiazoles with different π-bridging modulation: design, synthesis and application in WLED devices
Authors: Song Yuwei , He Yue , Hu Lai , Cheng Qian , Chen Zhiyuan , Liu Rui , Zhu Senqiang , Zhu Hongjun
Published: March 2023

White light-emitting diodes (WLEDs) are gradually replacing traditional lighting devices and are becoming a mainstream photosource, as they have advantages of low energy consumption and high efficiency.
Exploratory Examination of Speech Disfluencies in Spoken Narrative Samples of School-Age Bidialectal Children
Authors: Johnson Kia N. , Mills Monique T.
Published: March 2023

Purpose:

This study examined the relationship between school-age children's speech disfluencies and the use of and variation of Mainstream American English (MAE) and African American English (AAE). Given that bilingual children may present with notably more speech disfluencies than monolingual children, it was hypothesized that bidialectal speaking children (i.e., those that use both MAE and AAE) may exhibit higher speech disfluencies, as compared to children who speak mainly MAE and those who mainly speak AAE. It was also hypothesized that bidialectal speaking children would exhibit a greater variety of speech disfluency types when compared to the other two dialect groups (i.e., MAE and AAE).

Method:

School-age children (
n
= 61) with typical development and fluency were classified into three dialect groups: MAE speakers (
n
= 21), bidialectal MAE–AAE speakers (
n
= 11), and AAE speakers (
n
= 29). Tell–retell narrative samples were elicited from each participant using a wordless picture book. Speech disfluencies exhibited during these narrative samples were examined for frequency of stuttering-like and nonstuttering-like speech disfluencies and type of speech disfluency.

Results:

Findings indicated that bidialectal speaking children do not present with a higher frequency of speech disfluencies when compared to children who speak MAE and children who speak AAE. Additionally, there were no differences in the types of speech disfluencies exhibited by the different dialect groups.

Conclusions:

Unexpected findings of this study nullify both hypotheses and suggest that bidialectalism, in comparison to bilingualism, has less of an impact on speech fluency. Findings provide evidence that bidialectal speaking children are not at an increased risk for a misdiagnosis of stuttering. Clinically, these preliminary findings provide some scientific validity and specification to the appropriateness of using already established diagnostic criteria commonly used for stuttering with dialect speakers.
The CARMENES search for exoplanets around M dwarfs
Authors: Bello-García A. , Passegger V. M. , Ordieres-Meré J. , Schweitzer A. , Caballero J. A. , González-Marcos A. , Ribas I. , Reiners A. , Quirrenbach A. , Amado P. J. , Béjar V. J. S. , Cifuentes C. , Henning Th. , Kaminski A. , Luque R. , Montes D. , Morales J. C. , Pedraz S. , Tabernero H. M. , Zechmeister M.
Published: March 2023

The large amounts of astrophysical data being provided by existing and future instrumentation require efficient and fast analysis tools. Transfer learning is a new technique promising higher accuracy in the derived data products, with information from one domain being transferred to improve the accuracy of a neural network model in another domain. In this work, we demonstrate the feasibility of applying the deep transfer learning (DTL) approach to high-resolution spectra in the framework of photospheric stellar parameter determination. To this end, we used 14 stars of the CARMENES survey sample with interferometric angular diameters to calculate the effective temperature, as well as six M dwarfs that are common proper motion companions to FGK-type primaries with known metallicity. After training a deep learning (DL) neural network model on synthetic PHOENIX-ACES spectra, we used the internal feature representations together with those 14+6 stars with independent parameter measurements as a new input for the transfer process. We compare the derived stellar parameters of a small sample of M dwarfs kept out of the training phase with results from other methods in the literature. Assuming that temperatures from bolometric luminosities and interferometric radii and metallicities from FGK+M binaries are sufficiently accurate, DTL provides a higher accuracy than our previous state-of-the-art DL method (mean absolute differences improve by 20 K for temperature and 0.2 dex for metallicity from DL to DTL when compared with reference values from interferometry and FGK+M binaries). Furthermore, the machine learning (internal) precision of DTL also improves as uncertainties are five times smaller on average. These results indicate that DTL is a robust tool for obtaining M-dwarf stellar parameters comparable to those obtained from independent estimations for well-known stars.
Detection of ethanol, acetone, and propanal in TMC-1 New O-bearing complex organics in cold sources
Authors: Agúndez M. , Loison J.-C. , Hickson K. M. , Wakelam V. , Fuentetaja R. , Cabezas C. , Marcelino N. , Tercero B. , de Vicente P. , Cernicharo J.
Published: March 2023

We present the detection of ethanol (C2H5OH), acetone (CH3COCH3), and propanal (C2H5CHO) toward the cyanopolyyne peak of TMC-1. These three O-bearing complex organic molecules are known to be present in warm interstellar clouds but had never been observed in a starless core. The addition of these three new pieces to the puzzle of complex organic molecules in cold interstellar clouds highlights the rich chemical diversity of cold dense cores in stages prior to the onset of star formation. The detections of ethanol, acetone, and propanal were made in the framework of QUIJOTE, a deep line survey of TMC-1 in theQband that is being carried out with the Yebes 40m telescope. We derive column densities of (1.1 ± 0.3) × 1012cm−2for C2H5OH, (1.4 ± 0.6) × 1011cm−2for CH3COCH3, and (1.9 ± 0.7) × 1011cm−2for C2H5CHO. We investigated the formation of these three O-bearing complex organic molecules with the aid of a detailed chemical model that includes gas and ice chemistry. The calculated abundances at a time around 2 × 105yr are in reasonable agreement with the values derived from the observations. The formation mechanisms of these molecules in our chemical model are as follows. Ethanol is formed on grains via the addition of atomic carbon on methanol followed by hydrogenation and nonthermal desorption. Acetone and propanal are produced by the gas-phase reaction between atomic oxygen and two different isomers of the C3H7radical, which itself forms from the hydrogenation of C3on grains followed by nonthermal desorption. A gas-phase route involving the formation of (CH3)2COH+through several ion-neutral reactions followed by its dissociative recombination with electrons also contributes to the formation of acetone.
Kinetics of biodegradation of strengthening polymer systems based on copolymers of lactic acid and biogenic activators
Authors: Saprykina D. , Ivankin A. , Zarubina A. , Oliferenko G.
Published: March 2023

The production of bioplastics based on copolymers of maleic anhydride with the addition of lactic acid and furyl alcohol is described. The obtained copolymers are promising for use as reinforcing polymer systems of cellulose-containing materials used in packaging. It has been shown that the use of lactic acid and furyl alcohol makes it possible to obtain synthetic bioplastics that are rapidly degradable in natural conditions, which is favorable for environmental protection.
The influence of 3D-printing technological conditions on the performance properties of master models
Authors: Dvoryankin A. , Nefelov I. , Baurova N.
Published: March 2023

The influence of 3D-printing technological conditions on the performance properties of master models has been investigated. It is shown that strength properties of master models depend significantly on two parameters: layer thickness and percentage of filling. Recommendations onthe choice of 3D-printing conditions for manufacturing master models, as well as products based on master models, are presented.
Simulation of the curing of composite materials using microwave radiation with control of individual magnetrons
Authors: Galaeva E. , Prosuntsov P.
Published: March 2023

The traditional approach to the organization of the technological process of curing a binder polymer using microwave radiation is to rotate a workpiece around one axes in order to reduce the non-uniformity of its heating. Nevertheless, using this technical solution might lead to considerable difficulties when rotating larger workpieces, creating desired pressure on their surfaces and diagnosing the process. The approach suggesting that the workpiece itself remains stationary while the uniformity of its heating is achieved by creating a traveling electromagnetic wave in the operating area is to be considered a more promising direction in the development of curing technology. However, creating such a wave would require constructing a new and rather complex scheme for individual control of magnetrons, the theory of which has not been developed yet. The present work offers such a scheme of individual control and shows that using it allows to reduce the non-uniformity of the temperature field in a workpiece made of a polymer composite material with the maximum deviation of no more than 60 K, whereas the level of non-uniformity in the central part of the workpiece is not higher than 21 K.
Design and manufacturing of nano satellite frame
Authors: Kornilov E. , Khaziev A.
Published: March 2023

Currently, small spacecraft and their constellations are increasingly used in the rocket and space industry due to several their advantages. A version of a nano satellite frame made by a method of composite three-dimensional printing is presented in the research. A finite element analysis, a comparison of a designed structure with an aluminium analogue, and an economic substantiation of the proposed method for manufacturing the nano satellite frame have been carried out.
Analysis of sensitivity of elastic characteristics of unidirectional carbon fiber specimens with thermoplastic matrix to loading rate at high temperature
Authors: Dumansky A. , Fomina E. , Alimov M. , Khudorozhko M.
Published: March 2023

The problem of assessing the sensitivity of unidirectional carbon fiber reinforced plastics to loading rate is considered. As a rule, when the loading rate changes, the stress-strain curves for unidirectional CFRP specimens under loading at different off-axis angles change due to the rheological properties and physical nonlinearity. An attempt is made to reveal the degree of anisotropy sensitivity of a unidirectional carbon fiber reinforced plastic with thermoplastic matrix at an elevated temperature in the range of changes in the loading rate by two orders of magnitude both in stress and in strain.
How nitrogen alloying affects the structure of multilayer metal materials
Authors: Polikevich K. , Petrov S. , Plokhikh A.
Published: March 2023

This article deals with the way nitriding affects the structure of multilayer metal materials. The subject of research was a composition of alternating layers of the U8 carbon steel and austenitic 08H18n10 grade steel with various structuring degrees.
Evaluation of the quality of measurements of the testing laboratory during interlaboratory comparative tests
Authors: Mukhamedzhanova Olga , Borovkova Аnastasia
Published: March 2023

The article presents the statistical processing of the test results of the mass fraction of the chlorine ion (Cl) obtained from two accredited testing laboratories. The stages of statistical processing of the results of interlaboratory comparison tests are as follows: elimination of gross errors, determination of the uniformity of the sample, calculation of the assigned value, evaluation of the quality of the measurement results. The presence of gross errors in the sample was determined by the Grubbs test, and the uniformity of the sample was confirmed by the Fisher’s test and Student’s test. The assigned value was calculated by a robust method using algorithm A with an iterative scale. The quality of laboratory measurement results was evaluated using the z-score. The z-score value for each participant showed that the results of measuring the mass fraction of chlorine ion in cement samples were acceptable. The quality of the results of these laboratories is satisfactory and does not require corrective measures. These results of the test quality assessment can be used for the organizers of interlaboratory tests, as well as for accredited laboratories that check their qualifications.
Temperature properties of passive magnetic bearing
Authors: Bolotov Aleksander , Novikova Olga , Novikov Vladislav
Published: March 2023

The practical interest in passive magnetic bearings is due to the fact that they are not subject to wear and have insignificant dissipative energy losses. However, when the magnets are heated during operation, a reversible and irreversible decrease in the residual magnetization occurs and, consequently, the force of interaction between them changes. The thermal properties of passive magnetic bearings are adversely affected by the large demagnetizing fields from the coupled magnets. To predict the performance of passive magnetic bearings with regard to external temperature, an assessment of temperature changes in the bearing capacity of bearings with optimally shaped magnets is necessary. The optimum magnets were considered to be those with sizes, whose interaction force, reduced to a single volume of magnetic material, was the maximum. A magnetic system of two cylindrical magnets with equal radii and heights located coaxially or with some radial displacement was considered. The studies were carried out on cylindrical magnets made of SmCo5 alloy, capable of maintaining magnetically hard properties at temperatures up to 250°C. It was confirmed that irreversible changes in the magnetic force for bearings with optimally sized magnets are close to each other. The destabilizing (radial) magnetic force at small radial displacements of one of the magnets also irreversibly decreased. A temperature of 250°C defines the upper limit of the temperature range for the normal operation of magnetic bearings with SmCo5 magnets. It was found that as a result of the action of a demagnetizing field on magnets during heating, they develop a significant inhomogeneity of magnetization over the volume. After demagnetization of the magnets kept at a temperature of 260 °C, the force of their interaction reaches only 85 - 90% of the original, which is associated with microstructural changes in the magnets. Theoretically and experimentally, the numerical values of the temperature coefficients of changes in the bearing capacity and stiffness of bearings are determined.
Control mechanism of electricity consumption in a transport company
Authors: Tsyganov Vladimir
Published: March 2023

To reduce electricity consumption in hierarchical management of fabrication, it is necessary to take into account the activity of managers associated with the presence of their own targets. A three-level model of managing electricity consumption in production is considered. At its top level is the superior who evaluates the executive who is at the middle level. At the bottom of the system is the director of fabrication. The superior must to manage the consumption of the executive in such a way as to save electricity. But the executive knows own electricity-saving opportunities better than the superior. In turn, the director knows his own electricity-saving capabilities better than the executive. So, both the executive and the director can manipulate their electricity consumption to gain more incentives. To avoid this, a control system for electricity consumption management in fabrication is proposed. This system includes procedure for machine learning of the superior and procedure for grading of the executive. Sufficient conditions of the optimality of this system are found, in which random opportunities of decreasing electricity consumption are used. With such a system, the executive is interested in minimizing electricity consumption. The Theorem is proved that for this it is sufficient to use linear procedures of adaptive standardization and stimulation of the director. The proposed approach to control of electricity consumption is illustrated by the example of railcars repairing in the Russian Railways company.
Calculation model for lubrication of bearings with unconventional support surface profile and fusible shaft surface coating
Authors: Badakhov G. , Zinoviev N. , Mukutadze M. , Shvedova V.
Published: March 2023

This research work uses the true viscous fluid flow equation for the thin layer, the continuity equation, and the equation describing the radius of the fused shaft coated with a metal alloy taking into account the mechanical energy dissipation rate formula to find the asymptotic and the exact self-similar solution for the zero and first-order approximation for the radial sliding bearing with the support profile adapted to friction and lightalloy coating for incomplete filling of the working gap. We obtained the analytical dependencies for the fused surface radius of metal coating and the speed and pressure field. Besides, we determined the key operating parameters of the reviewed friction couple, the carrying capacity, and the friction force. The authors assess the impact of the parameters associated with the fusing of the coating of the friction-adapted support profile and the length of the loaded area on the carrying capacity and the friction force.
Project management model of motor vehicle development with consideration of built-in quality concept requirements
Authors: Zhidkikh Nikita , Smolyaninov Andrey , Deniskin Yury , Polity Violetta , Mangushev Ilgiz
Published: March 2023

Problem of long timeframes of new car model development cycle due to excessive testing process of numerous vehicle prototypes is specified. Positive example of solving the problem using digital twin, computer modelling and virtual testing technologies in Formula 1 is given. Positive effect of virtual verification and validation during the development process on built-in product quality and development cycle time reduction is indicated. Existing project management V-models in automotive and information technology industries are reviewed and analyzed. State standards and methodologies of project management, lean manufacturing and digital twin development are reviewed. The improvements based on project life cycle, project management processes and product life cycle are enumerated and explained. Improved V-shaped project management model is described and visualized. The proposed model positive effects are described: it allows to increase the level of built-in vehicle quality, shorten its development cycle timeframes while providing the connection between project management and product development processes.
An encryption technique using the adjacency matrices of certain graphs with a self-invertible key matrix
Authors: Mohan P. , Rajendran K. , Rajesh A.
Published: March 2023

The most important approaches for safeguarding our communications and data nowadays are message encryption techniques. The use of the internet and network communications has increased the pace of message encryption technology development. Sharing sensitive, private messages through unsecured networks makes it possible for an attack, theft, or hacking of the messages. In order to reduce this term, cryptographic methods have been found essential. There are several symmetric enciphering methods; a few examples are the Caesar Cipher, Hill Cipher, and others. In order to generate a complex cipher text, the enciphering method described in this article encrypts and decrypts the messages given to it using a selfinvertible key matrix and an adjacency matrix of certain graphs like A graph, Centipede C2, Domino graph. Since we are using the self-invertible matrix as a key matrix, whose inverse always exists, thus we can decode the ciphertext without computing the inverse of the key matrix. The lessening in computational complexity facilitates our ability to determine the inverse of a key matrix.
Applications of some modified open sets in r-neighbourhood spaces with ideals
Authors: Tharmar S. , Nagarajan A. , Rajesh E. , Thanigasalam T. , Senthilkumar R.
Published: March 2023

The purpose of this paper is to introduce r-a-open sets, r-semi open sets and r-pre open sets in ideal r-neighbourhood space. We also discuss their properties, characterizations and relations with existing notions with suitable examples. Then we develop this paper towards rlimit points and r-interior points in ideal r-neighbourhood space and obtain nice results. 2010 Mathematics Subject Classification. Primary 03E99; Secondary 54A05, 54A10.
Research on the productivity and interior of fattening bulls
Authors: Zabashta Nikolay , Golovko Elena , Sinelshchikova Irina , Izhevskaya Nataliya
Published: March 2023

The results of studies of the productivity and interior of young cattle of the Charolais breed fattened in CJSC Firm of Agrocomplex named after N.I. Tkachev, Vyselkovsky district, Krasnodar Territory. With a live weight before slaughter of 560.4 ± 16.7 kg, carcasses with a slaughter yield of 68.0% were distinguished by high rates of meat: the yield of boneless beef for baby food was 81.0%. At the age of 18 months animals had the highest content of total protein in the blood serum. In comparison with 12-month-old, bulls of 18 months old sowed higher live weight values, as well as higher albumin fraction indicators. The same trend was observed for the protein index (Albumin/Globulin - A/G) - an indicator of the state of protein metabolism (0.72 - at 12 months and 1.23 - at 18 months). An increase of 3.8% in the amount of lysozyme in the blood serum of bulls at the age of 18 months was established. compared to 12 months. (p<0.05).
Wooden roof structures of the Moberg house
Authors: Seliutina Liubov , Ratkova Elena , Okulova Ekaterina
Published: March 2023

The preservation of cultural heritage sites is an important task. Historical monuments are a reflection and documentary evidence of the past, information about which must be preserved and passed on to future generations. One of the most vulnerable and fragile structures in a building is the roof. This work provides historical information and presents the results of a survey of the structures of the building of engineer Moberg in the urban-type settlement of Kalevala in the Republic of Karelia of the Russian Federation. The structural system of the roof and the joint work of its elements have been studied. The expediency of preserving the structural system, shape and geometric parameters of the roof, as well as replacing the existing structures before the reconstruction with new elements from modern sawn timber has been substantiated. The cultural heritage site “House of Engineer Moberg” is an architectural monument of regional significance of the early 20th century and the main historical building of the urban-type settlement of Kalevala, built under the influence of the ideas of Finnish national romanticism. According to archival sources, the house was built in 1906 and renovated in 1925-1926 with the participation of engineer Eduard Moberg and builder Tuomas Waller. Nowadays, the building houses the ethnocultural center kalevalatalo.
Reliability analysis of pile foundations: peculiarities of consideration of uncertainties and partial factors
Authors: Ushakova E.
Published: March 2023

Pile foundations are used to transmit construction loads deep into the ground, thus ensuring the stability of the structure. In this context, there is no question that the calculation of pile bearing capacity is important in the design of economical and safe geotechnical structures. Typically, the axial bearing capacity of piles can be determined using five approaches. At the same time, under real conditions, the effectiveness of these approaches is limited, firstly, by the restrictions inherent in their computational apparatus and, secondly, by the action of a variety of uncertain and random factors. Meanwhile, in geotechnics the uncertainties are largely unknown or very difficult to measure. In view of the above, the aim of the article is to develop a methodology for analyzing the reliability of a pile foundation taking into account uncertainties and partial factors. The methodological basis of the research is a comprehensive approach, which includes the analysis and synthesis of literary data on the topic of work, analytical and experimental research. In the process of research an algorithm based on the Monte-Carlo method and the evolutionary neural network, which allows in the process of calculating the reliability of piles to take into account such uncertainties as: physical, statistical and modeling uncertainties. The conducted tests showed that the model has a high prediction accuracy. The theoretical value of the obtained results consists in the development of the pile foundation reliability evaluation apparatus due to the use of neural network modeling. In practice, the recommendations formulated in the article can be used as a basis for conducting experiments with pile foundations in various soil sciences conditions.
The influence of mathematical modeling on the physical impact in soils
Authors: Agakhanov Elifkhan , Agakhanov Murad , Agakhanov Gadji
Published: March 2023

The behavior of soils in the foundations of buildings and structures, as well as in ground structures and massifs, is formed under the influence of force (surface and volume) and physical (temperature, humidity, etc.) influences. However, if mathematical modeling of force impacts in ground environments can be considered a completely solvable task today, then we consider such a statement premature in relation to physical impacts. The peculiarity of physical impacts is that they can be both the cause of forced deformations and the cause of changes in soil properties. The ground environment with creep properties, which is under both force and physical influences, is considered. The systems of equations of mechanics of a deformable solid for a triaxial stress state and a differential equation of thermal conductivity are used. Within the framework of the model of a linearly deformable continuous isotropic body, mathematical modeling of physical impacts in ground media with creep properties was performed. In a quasi-elastic formulation, a solution is obtained for an unlimited soil massif with a flat surface under the action of a plane -parallel heat flow. In the absence of force influences in a quasielastic medium for deformations from physical influences, we have the usual equations of elasticity theory. The solution obtained for an unlimited soil massif allows the calculation of stresses taking into account creep caused by temperature fluctuations on the surface in it.
Transport accessibility assessment of rural tourism facilities
Authors: Zolotarev Sergey , Kusakina Olga , Ryazantsev Ivan , Yushchenko Irina , Ivashova Valentine
Published: March 2023

The paper presents the results of theoretical understanding of the transport accessibility of rural tourism facilities and an empirical study of the opinions of rural tourism consumers. On the basis of a brief review of scientific publications on the development of various types of rural tourism and the impact of transport accessibility of tourist facilities on them the relevance and significance of the research is determined. The factors that influence the choice of tourist products are formulated. Estimated judgments of survey participants are analysed and latent variables and the role of quality of transport infrastructure in the choice of tourist products are established on the basis of a statistical procedure of factor analysis. The data obtained constitute an important input for transport accessibility of rural tourism facilities and infrastructure decision-making in regions with a large share of rural areas.
Survey of transport company employees' mindsets and values
Authors: Shukshina Lyudmila , Shukshina Tatiana , Taysaeva Svetlana , Kamneva Olga , Kalimullin Timur
Published: March 2023

This paper presents a study of the attitudes and values of employees in transport companies. The relevance of the study stems from the fact that the attitudes and values of employees affect the performance of the organisation in the same way as professional skills and often organisations do not find it necessary to pay attention to this, reducing the manager's job to identifying competencies. It is important for internal management to know the motivations and values of employees, because they are often transferred to colleagues and customers. The following methods were used in the research: diagnostics of socio-psychological orientations of personality in motivational and demand sphere by O. F. Potemkina, diagnostics of values - Schwarz questionnaire, peculiarities of internal marketing were studied by R. Mowday, R. Stiers, and L. Porter's method of personnel loyalty measurement. Sociopsychological attitudes have been shown to correlate with the values of transport company employees with different length of service. It was found that there is a significant direct correlation between the indicators "result" and "universalism", "work" and "achievement", "work", and "independence" for employees of the transport company with 15 to 20 years of work experience. For employees whose length of service varies from 5 to 15 years, there is a positive correlation between the indicators "process" and "independence", "work" and "stimulation", "money" and "independence". The study will make it possible to determine company development strategies through human resources, taking into account the length of service. This is necessary to optimise the performance of the entire transport company.
Analysis of the recovery device control system
Authors: Nuyya O. , Bushuev A. , Litvinov Yu. , Boikov V. , Sergeantova M.
Published: March 2023

Energy recovery of various types is an urgent task in the development of control systems for electromechanical devices. rational and careful use of energy resources. The purpose of this work is to analyze four-quadrant asynchronous electric drives with vector frequency-current control systems and autonomous voltage inverters with sinusoidal pulsewidth modulation based on IGBT modules. The design algorithm is considered and the results of modeling of such energy recovery systems are given. The proposed control system of the recovery device can be used as an integral part of a specialized controlled electric drive for escalator stations of the subway, electric transport and other electromechanical systems in order to save energy consumed.
Audit methodology for middle and lower-level managers of a transport company
Authors: Kapitonova Yulia , Vakulyuk Vadim , Omelchenko Oleg
Published: March 2023

The staff of the organization, as the main driving force of any company, at all times required special attention. And in the conditions of digital globalization, deeper penetration of artificial intelligence into everyday life, the attitude of an ordinary employee to his work is transformed, the requirements for managerial personnel are also changing. The problem being developed in the current article is relevant due to the growing discontent in the labor market. The main purpose of the study is to develop a methodology for auditing middle and lower-level managers. The main results of the conducted research can be called: firstly, the methodology of the audit of the management of the middle and lower levels of the transport company is presented, secondly, the ranking of managers according to the effectiveness of their professional activities is presented, thirdly, the sequence of the audit of middle and lower level managers is presented and justified. The practical significance of the conducted research lies in the fact that the formulated proposals can be used in the audit of the management staff at the enterprises of the transport industry.
Diversification mechanisms and their effectiveness
Authors: Kashirin A. , Kashirin P. , Semenov A.
Published: March 2023

The work is devoted to finding effective mechanisms for the implementation of diversification and commercialization in large companies. World practice outlines that big are quite actively use the purchase (mergers and acquisitions) of other companies as a powerful diversification tool. Mergers and acquisitions allow companies - buyers quickly increasing the number of new products and services in their portfolio. This mechanism is used in the military and civilian sectors simultaneously. Boeing, Northrop Grumman, Raytheon Corp., Intel, Google, NEC and others are constantly buying third-party companies and sell their own assets. Based on the analysis of domestic and foreign experience in this area, it is concluded that, among currently used, the most optimal diversification mechanisms are the purchase of innovative companies, the involvement of external teams in the organization. Also among these mechanisms are buying the specialists with innovative technological competencies, the acquisition (purchase) of external innovative technologies and competences.
Historical and retrospective aspects of the development of the regional system of additional (pre-university) education as an environment for the formation of a specialist who meets the requirements of the time
Authors: Sergushina E. , Lomshin M.
Published: March 2023

The concept of socio economic development of the Russian Federation pays special attention to the issue of increasing the competitiveness of the domestic economy, which implies improving the training of personnel capable of meeting its needs. Ensuring the high quality of Russian education in accordance with the changing demands of the population are promising tasks for the development of Russian society and economy. Practically every legal document regulating the sphere of education in the Russian Federatio n emphasizes the importance of training and retraining of specialists for various branches of social and economic development, giving priority to the needs of the population for high quality educational services that meet their needs, paying special attent ion to the role of training and retraining of scientific and pedagogical personnel, since they will train specialists various specialties and areas of professional activity in the conditions of social and economic transformations.
Pricing strategy for work and services of transportation company
Authors: Shkurina L. , Maskaeva E.
Published: March 2023

Competitive pressures and economic turbulence increase the need to find new ways to maintain a stable financial position. This task is also faced by the railway transport and makes transport companies look for new markets for new works and services. The article considers the market of track structure maintenance services and reveals the factors that influence the volume of this market. The authors of the article consider the pricing policy for track structure maintenance services. Based on the analysis of competitors’ prices and the pricing policy pursued by the infrastructure directorate, an approach to the formation of the pricing strategy in this market segment is proposed.
Identifying conceptual gaps in the concept of natural personhood in the banking and credit system of Tajikistan
Authors: Muhammadyusuf Shukhratpur
Published: March 2023

The question around the subject of bank credit has always been in the view of legal jurisprudence and doctrine. One of these issues is that the legal personality of a natural person in banking-credit relations is devoid of comprehensive scientific and legal study. This emphasizes the necessity of further research into the issue. This article is devoted to the participation of natural persons in the banking-credit obligations of the Republic of Tajikistan. It also provides an overview of the reality of the existence of natural persons as a subject of civil law obligations. It also investigates the relationship between the concepts of «natural person» and «citizen». It analyzes the essence of a natural person as a participant in banking-credit obligations, and combines the analysis results in order to define the characteristics of the subject. This article considers a natural person as a participant in all civil law relations, then as a participant in banking-credit obligations. Within the study framework, the use of the term «natural person» is suggested instead of the incorrect term «citizen». This article is also the first to investigate the constituent elements of the legal personality of a natural person in banking-credit obligations. It discusses the issue of the legal personality of natural persons as a participant in banking-credit obligations, clarifies the concept of legal capacity, and qualifies certain categories of the active legal capacity of natural persons. Moreover, it also describes the types of bank credit with the participation of natural persons in two main groups.
The nexus of top executives’ attributes, firm strategies, and outcomes: Large firms versus SMEs
Authors: Xie Jun , Nozawa Wataru , Managi Shunsuke
Published: March 2023

Based on a unique and extensive dataset of top executives, this study explores the effect of top executives’ attributes on firm performance through strategic choices for capital structure and investments. The big five personalities and top executives’ other four essential personal attributes are identified from over 970,000 observations in Japanese firms. We applied structural equational modeling to test the hypothesized mediation models and the differences across large, medium, and small-sized firms. The results show that top executives in small and medium-sized enterprises (SMEs) present stronger linkages with strategic choices, significantly mediating the relationship between top executives’ attributes and firm performance. Specifically, top executives with higherconscientiousness,decisiveness, andfinancial prudencetend to choose conservative strategies, while those with higherneuroticism, openness, andagreeablenesstend to adopt risky and innovative strategies. In contrast, top executives’ attributes can hardly predict firm strategies and outcomes for large firms, and neither fails to predict firm outcomes in SMEs given the inconsistent mediation.
Exploring the parameter space of MagLIF implosions using similarity scaling. II. Current scaling
Authors: Ruiz D. E. , Schmit P. F. , Yager-Elorriaga D. A. , Gomez M. R. , Weis M. R. , Jennings C. A. , Harvey-Thompson A. J. , Knapp P. F. , Slutz S. A. , Ampleford D. J. , Beckwith K. , Matzen M. K.
Published: March 2023

Magnetized liner inertial fusion (MagLIF) is a magneto-inertial-fusion (MIF) concept, which is presently being studied on the Z pulsed power facility. The MagLIF platform has achieved interesting plasma conditions at stagnation and produced significant fusion yields in the laboratory. Given the relative success of MagLIF, there is a strong interest to scale the platform to higher peak currents. However, scaling MagLIF is not entirely straightforward due to the large dimensionality of the experimental input parameter space and the numerous physical processes involved in MIF implosions. In this work, we propose a novel method to scale MagLIF loads to higher currents. Our method is based on similarity (or similitude) scaling and attempts to preserve much of the physics regimes already known or being studied on today's Z pulsed-power driver. By avoiding significant deviations into unexplored and/or less well-understood regimes, the risk of unexpected outcomes on future scaled-up experiments is reduced. Using arguments based on similarity scaling, we derive the scaling rules for the experimental input parameters characterizing a MagLIF load (as functions of the characteristic current driving the implosion). We then test the estimated scaling laws for various metrics measuring performance against results of 2D radiation–magneto-hydrodynamic hydra simulations. Agreement is found between the scaling theory and the simulation results.
Nanosecond-pulsed plasma jet in air and air/helium mixtures: Plasma properties and anticancer effect
Authors: Qi Miao , Zhang Xinying , Peng Sansan , Fan Runze , Pang Bolun , Luo Rong , Ding Zhenjie , Xu Dehui , Liu Dingxin
Published: March 2023

Nanosecond-pulse power has the characteristics of quickly increasing applied power, short pulse width, and considerably high-energy electrons. In this study, we investigated the different air/helium mixture ratios of nanosecond-pulsed-power-driven plasma jet discharge characteristics and the physicochemical properties of the gaseous and aqueous phases. Results showed that the length and luminescence intensity of the plasma increased with decreasing air ratio. Notably, there is a maximum inflection point in N2O5 of Fourier transform infrared spectrometry detection and concentration of H2O2 at 70% air ratio. Furthermore, we used drug-resistant ovarian cancer cells (A2780/ADR) as a model to detect the anticancer effect, with the results indicating that 70% air ratio is the best condition to inhibit cell growth and induce cell apoptosis. Our research indicates that the air discharge driven by a nanosecond-pulse power supply has potential application in an ovarian cancer drug-resistant tumor cell therapy.
Overexpression of rice acyl-CoA-binding protein OsACBP5 protects Brassica napus against seedling infection by fungal phytopathogens
Authors: Panthapulakkal Narayanan Saritha , Alahakoon Aruni Y. , Elliott Candace E. , Russell Derek , Taylor Paul W. J. , Lo Clive , Chye Mee-Len
Published: March 2023

Context Class III acyl-CoA-binding proteins such as those from dicots (Arabidopsis and grapevine) play a role in defence against biotrophic pathogens. The overexpression of the monocot Oryza sativa (rice) OsACBP5 in Arabidopsis and rice has been demonstrated to enhance broad-spectrum disease resistance against selected phytopathogens in OsACBP5-overexpressing (OsACBP5-OE) lines. Aims We aimed to develop transgenic rapid-cycling Brassica napus (B. napus-RC) and canola cv. Westar OsACBP5-OEs using tissue culture-based Agrobacterium-mediated transformation and to evaluate transgenic plants for resistance against Alternaria blight, blackleg and Sclerotinia rot diseases. Methods Transgenic B. napus-RC and cv. Westar OsACBP5-OEs were generated through Agrobacterium-mediated transformation using Agrobacterium strain LBA4404 harbouring a plasmid with the rice complementary DNA encoding OsACBP5 driven by the cauliflower mosaic virus 35S promoter. Alternaria blight and blackleg pathogen assays were based on infecting young cotyledons, while detached leaf assay was used to test the tolerance of B. napus plants toward Sclerotinia sclerotiorum. Key results Average transformation efficiencies of 24.2% and 29.1% were obtained for B. napus-RC and B. napus cv. Westar cotyledons respectively. OsACBP5-OE plants exhibited resistance 5 days after inoculation with Alternaria brassicae, 12 days after inoculation with Leptosphaeria maculans, and 24 h after inoculation with S. sclerotiorum. Conclusions Transformation of B. napus-RC was shown herein to be an effective trait testing platform for canola. This study also provides an insight into the usefulness of OsACBP5 in enhancing resistance to necrotrophic phytopathogens. Implications OsACBP5 can be overexpressed in other crops to generate pathogen-resistant varieties.
Manufacturing and characterisation of magnesium composites reinforced by nanoparticles: A review
Authors: Monish P , Hari Krishna KL , Rajkumar K
Published: March 2023

Magnesium metal matrix composites (Mg-MMC) are versatile materials notable for their utilisation in automotive, aerospace, and manufacturing sectors due to their superior mechanical properties and high specific strength. Nanoparticle reinforcements at varying concentrations are used to improve the mechanical and tribological properties of the Mg alloy. In this paper, the effects of varying nanoparticles (namely silicon carbide, carbon nanotubes, titanium nanoparticles, and tungsten carbide) on different Mg alloys are discussed along with relevant manufacturing processes. From the literatures, Mg-MMCs are fabricated from AZ91 alloy with silicon carbide nanoparticle reinforcement of 1 wt-% composition, manufactured using ultrasonic-assisted stirring, which showed the best relationship in overall material properties over other nanoparticle reinforcements.