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Aim. To find and argue points of growth of additive manufacturing, as well as to justify the rel­evance and significance of new business models using digital platforms.Tasks. To consider the features of management of digital additive manufacturing; to analyze the reasons for the low rate of additive technology development; to show the prospects of dig­ital development of additive manufacturing; to justify the importance of digital platforms for additive services as a new business model and prove that digital additive manufacturing can be characterized as a system innovation.Methods. General scientific methods (analysis, synthesis, monographic, grouping) were used in the research. The best Russian and world practices, fundamental and applied works of na­tional and foreign researchers, scientists, practitioners in the field of management, digital transformation were studied using the search of relevant research in open sources, both in ge­neral purpose search engines, and in specialized search engines and databases.Results. It is proved that digital additive manufacturing should be regarded as a system in­novation, and its large-scale benefits can be realized if the technology is complemented by va­rious innovations in products, processes and services. From the author's point of view, the po­tential and prospects of a new business model in the online market of additive design and manu­facturing are obvious: a digital platform of additive services for manufacturing parts from various materials.Conclusions. Additive manufacturing plays a vital role in Industry 4.0 because of the shortened cycle time of the lean process and the high degree of decentralization of production processes. Therefore, a systematic approach using digital platforms is required to unlock their capabilities. Customers who require parts produced using this technology can place their designs on a plat­form and find a manufacturing partner based on available technical resources, geographic loca­tion, and the amount of anticipated cost. Implementing a digital platform design strategy that integrates all stages of the design and production process for different products, facilitates data traceability and product reproducibility on different additive manufacturing machines, greatly increases customer value.

A numerical model of heat transfer in the “human – clothing – environment” system under wind conditions is presented. It was used to study the nature of heat transfer in the I climatic region of the Russian Federation under the combined effect of low temperatures and wind. The conditions for the destruction of the boundary layer on the surface of clothing, as well as the nature of the change in the intensity of heat exchange between a person and the environment, are established.

The phylogeography of the Altai weasel (Mustela altaica) based on mitochondrial control-region sequences was investigated using samples from individuals obtained widely across the species range, including Central Asia, Tibet and southern Siberia. Thirty-four haplotypes were identified among 53 individuals from 32 localities. A maximum-likelihood phylogenetic tree for haplotypes showed two major clades, clades I and II. Clade I contained haplotypes from northern Eurasia, including the continental Far East, Altai Mountains and eastern Kazakhstan. Clade II comprised two subclades: group IIa, with haplotypes from around the Pamir Mountains, and the poorly supported group IIb, with haplotypes from the Tibetan Plateau. High haplotype diversity and low nucleotide diversity for clade I suggest that the range of M. altaica expanded over a relatively short period in northern Eurasia. High haplotype and nucleotide diversity for clade II indicate a longer-term, more stable population resulting from geographical isolation of individuals on the Tibetan Plateau by surrounding mountain ranges. Our study suggests that the ancestral population of M. altaica migrated into Tibet from the outside and has diversified in Tibet, seemingly not supporting the ‘out-of-Tibet’ hypothesis; however, we could not completely refute this hypothesis because an individual having a group IIb haplotype was detected in Mongolia.

The development of information technologies requires great attention of managers to the formation of information support and the promotion of goods and services to the market. The industry of tourism and hotel industry is developing in conditions of significant competition. Therefore, taking into account the relevance of the issue, the article considers innovative mechanisms for building effective management systems in tourism and the hotel and restaurant industry through the use of digital technologies. The purpose of the study is to develop ways of implementing innovative mechanisms for ensuring effective communications in the system of development of enterprises in the field of tourism and hotel and restaurant industry. a retrospective analysis of communication systems was carried out. The article is devoted to the definition of innovative technologies for the development of the communications system in different historical periods. The article defines modern trends in the innovative application of communication technologies and the latest communication systems. As a result of the study, the role of innovations in the formation of effective communications is substantiated, taking into account the specifics of the tourism and hotel and restaurant industry. The problems of remote communication under certain limitations have not yet been sufficiently studied. In particular, it is difficult to say about the consequences of such influences on the mental and psychological state of a person, because people are social beings and communication is a basic human need. Analyzing the processes of development of communication systems, it is possible to determine the cause-and-effect relationships of transformation, the influence of social processes on communications and communications on social processes. In the conditions of a competitive environment in the service sector, communication processes ensure high competitiveness of enterprises, provided they are effectively implemented. Therefore, it is appropriate to turn to the issue of finding innovative communication technologies in the system of development of tourism and hotel and restaurant enterprises. Keywords: digital technologies, innovative technologies, tourism, hotel and restaurant business.

The effect of the type (bovine chymosin (Chy-max Extra), camel chymosin (Chy-max M), and modified camel chymosin (Chy-max Supreme)) and applied dose (1500, 2500, or 3500 IMCU/100 kg of milk) of milk-clotting enzyme (MCE) on the proteolysis degree, microstructure, rheological and sensory properties of Crescenza soft cheese was studied. The proteolysis degree of cheeses was directly proportional to the general proteolytic activity (PA) and dose of the MCEs added into milk during the cheese production. With an equal dose of the MCEs added into milk, the highest level of proteolysis was noted in the cheese options produced with recombinant bovine chymosin (Chy-max Extra). There were no statistically significant differences (p > 0.05) in the proteolysis degree between the cheese options made with the same doses of the camel chymosin (Chy-max M) and modified chymosin (Chymax Supreme). After 21 days of storage, the cheeses with Chy-max Extra MCE had the most plastic consistency, while the cheeses with Chy-max Supreme MCE had the hardest and most elastic one. Cheeses produced with Chy-max M MCE occupied an intermediate position in terms of consistency density. Recombinant MCEs based on camel chymosin (Chy-max M) and modified chymosin (Chy-max Supreme) with low level of PA, may be recommended for use in the production of soft cheeses. This will extend the shelf life of cheeses by slowing-down the plasticization rate of their consistency.

It is shown that the existing mathematical models of heat transfer do not fully take into account the real shape and dimensions of the air layers of ventilated clothing. A numerical modelling method is proposed that takes into account the influence of the morphology of the human body and the physical and mechanical properties of textile materials on the size and shape of the air gap. Peculiarities of convective processes in the air interlayers of ventilated clothing at the ambient temperature of +27 °C are revealed by the calcula-tions. The zones of intensification and deceleration of the air flow under the clothes were revealed. It is shown that the results of calculations are consistent with the results of experimental studies.

The effect of milk-clotting enzymes (MCE) with different milk-clotting activity (MCA) and proteolytic activity (PA) based on recombinant calf chymosins (Chy-max® Extra: MCA=554 IMCU/g; PA=0.71 UA/g), camel (Chymax® M: MCA=904 IMCU/g; PA=0.68 PA units/g) and “modified” chymosin (Chy-max® Supreme: MCA=912 IMCU/g; PA=0.26 PA units/g) on the duration of milk coagulation, the composition of whey and fresh cheeses in the production of soft cheese of the Italian type Crescenza at a dose of MCE equal to 1500, 2500 and 3500 IMCU per 100 kg of milk was studied. With an equal introduction dose, the shortest average duration of curd formation is noted for Chy-max Supreme MCE (15.0–27.5 min), long one — for Chy-max M MCE (17.0–31.0 min), and the longest one — for MCE Chy-max Extra (18.0–35.5 min). There was no statistically significant effect (p< 0.05) of the type and dose of MCE on the total duration of cheese processing, as well as on the content of fat, protein and dry matter of whey. The type and dose of MCE had an impact on the properties of fresh cheeses: cheese options produced with the maximum dose of Chy-max Supreme had a statistically significant (p

Estimating word complexity with binary or continuous scores is a challenging task that has been studied for several domains and natural languages. Commonly this task is referred to as Complex Word Identification (CWI) or Lexical Complexity Prediction (LCP). Correct evaluation of word complexity can be an important step in many Lexical Simplification pipelines. Earlier works have usually presented methodologies of lexical complexity estimation with several restrictions: hand-crafted features correlated with word complexity, performed feature engineering to describe target words with features such as number of hypernyms, count of consonants, Named Entity tag, and evaluations with carefully selected target audiences. Modern works investigated the use of transforner-based models that afford extracting features from surrounding context as well. However, the majority of papers have been devoted to pipelines for the English language and few translated them to other languages such as German, French, and Spanish. In this paper we present a dataset of lexical complexity in context based on the Russian Synodal Bible collected using a crowdsourcing platform. We describe a methodology for collecting the data using a 5-point Likert scale for annotation, present descriptive statistics and compare results with analogous work for the English language. We evaluate a linear regression model as a baseline for predicting word complexity on handcrafted features, fastText and ELMo embeddings of target words. The result is a corpus consisting of 931 distinct words that used in 3,364 different contexts.

Introduction. In recent years, ultrasound and endovisual guidance have been introduced into clinical practice when performing percutaneous nephrolitholapaxy.Objective. To identify the most significant factors that influence the frequency of complete elimination of stones and the development of complications in percutaneous nephrolitholapaxy performed under ultrasound and endovisual guidance.Materials and methods. We analyzed the results of the treatment of 515 kidney stone patients who underwent percutaneous nephrolitholapaxy under ultrasound navigation and endovideoscopic guidance using a new method developed by us.Results. The average duration of the operation was 77.2 ± 1.9 min. Most of the operations were performed through one puncture access (95.1%) and in one stage (91.8%) with complete stone elimination in 80.6% of the cases. The degree of decrease in hemoglobin in the postoperative period was only 12.18 ± 0.6 g/l. The frequency of postoperative complications was 29.3%, in most cases there were 1 - 2 severity grades according to Clavien-Dindo. As a result of multivariate regression analysis, independent predictors influencing the frequency of complete stone eradication were the number of stones (p = 0.012), the fact of the presence of staghorn stone (p = 0.016), the number of stages of surgical intervention (p = 0.001). Correlation analysis revealed a statistically significant negative correlation between body mass index and the occurrence of complications (p = 0.005), a positive correlation between the presence of urinary tract infection and the occurrence of complications (p = 0.048), a positive correlation between the grade of blood loss and the occurrence of expectation (р < 0.001).Conclusions. Percutaneous nephrolitholapaxy under ultrasound and endovisual guidance without the use of X-rays is an effective intervention for most patients with kidney stones. Complete stone eradication depends on the number of stones, the presence of staghorn stone, and the number of stages of surgery. The incidence of complications is significantly affected by the body mass index, the presence of urinary infection and the degree of decrease in hemoglobin during surgery.

The article presents the design of the architectural and artistic composition “Memorial stele on a local spherical support” (KB-1 Stele), as well as the analysis of design solutions and the calculated justification of the strength and stability of the KB-1 Stele to external influences in conditions of the most intense climatic influences with parameters set according to building codes and regulations. The design of the KB-1 Stele is a vertically installed overall mass model of a peaceful nuclear explosive device weighing 2.8 tons and 2.8 meters high with hemispherical covers. In accordance with the terms of reference, it was required to preserve the appearance of the device as accurately as possible by placing it on a small local support. The peculiarity of the design lies in its angular mobility relative to the support. To ensure a stable equilibrium state of the stele, a hinge is organized at the place of support, the stele is installed freely by the lower sphere on an intermediate stand with a specially selected spherical surface. Additionally, the center of mass of the stele is significantly reduced by lightening (thinning the walls) of the upper part of the body and installing additional cargo in its lower part. As a result, under the action of external lateral loads, the stele acquires a stable position with possible fluctuations in the tumbler type and with a return to its original state. Analytical and numerical computational studies were performed to substantiate the strength and stability of the KB-1 Stele under external loads. It is shown that the developed design meets the regulatory requirements and is safe in operation.

A comparative test was carried out for milk-clotting enzymes (MCE) of animal origin (Naturen® Extra), microbial origin (Marzyme®) and MCE based on recombinant camel chymosin (Chy-max® M) in the production of soft cheese “Lyubitelskiy”. By the end of the shelf life of the cheeses (12 days at a temperature of 3 ± 1 °C), differences were noted in the degree of proteolysis (DP) and the value of the complex modulus G*, which were the following ones for cheeses produced with MCE of the brands: Naturen® — DP = 17.86 ± 0.24%; G* = 4164 ± 587 Pa; Marzyme® — DP = 17.98 ± 0.49%; G* = 4581±786 Pa; Chy-max® M — DP = 9.85 ± 0.63%; G* = 7949 ± 1157 Pa. Cheeses made with Chy-max® M MCE had a denser texture than cheeses made with MCE of Naturen or Marzyme, which did not differ significantly in consistency. In the studied cheeses, the severity of the bitter taste was proportional to the content of water-soluble peptides with a mass of 0.5–3 kDa. Cheeses with Marzyme® MCE had a more intense bitterness than cheeses with Naturen® MCE. There was no bitter taste in cheeses produced with MCE of Chy-max® M. It was concluded that in the production of soft cheeses, recombinant camel chymosin can be used to increase the shelf life, and MCE of microbial origin can be recommended to replace more expensive MCE of animal origin.

Bismuth–lithium alloys are considered primary candidates for the reductive extraction step in the on-line reprocessing of molten salt reactor fuel. The corrosion behavior of molybdenum-based alloys and Hastelloy® B-3 alloy (taken for comparison) was examined here in a liquid Bi–Li (5 mol.%) alloy at 650 °C. MoW10, MoW30, and TZM corrosion-resistant alloys were studied as prospective construction materials for holding liquid bismuth–lithium alloy. Rates of corrosion were determined by the gravimetric method as well as by chemical analysis of corrosion products formed in liquid-phase Bi–Li alloy. The microstructure and chemical composition of samples of the materials and Bi–Li alloys containing the corrosion products after the tests were determined using inductively coupled plasma–atomic emission spectroscopy, X-ray fluorescence analysis, scanning electron microscopy, and energy dispersive spectroscopy. TZM molybdenum-based alloy corrodes in the bismuth-lithium alloy due to the formation of a zirconium–bismuth intermetallic compound, which passes into the liquid phase. The corrosion rates of MoW10, MoW30, and TZM alloys at 650 °C were 16, 16, and 23 µm/year, respectively. Hastelloy® B-3 alloy, despite its high molybdenum content, was subjected to severe corrosion in liquid Bi–Li alloys due to dissolution of nickel in liquid bismuth. The corrosion rate of this alloy was 14 mm/year.

There are only about 7,100 adolescent and adult cheetahs (Acinonyx jubatus) remaining in the wild. With the majority occurring outside protected areas, their numbers are rapidly declining. Evidence-based conservation measures are essential for the survival of this species. Genetic data is routinely used to inform conservation strategies, e.g., by establishing conservation units (CU). A commonly used marker in conservation genetics is mitochondrial DNA (mtDNA). Here, we investigated the cheetah’s phylogeography using a large-scale mtDNA data set to refine subspecies distributions and better assign individuals to CUs. Our dataset mostly consisted of historic samples to cover the cheetah’s whole range as the species has been extinct in most of its former distribution. While our genetic data largely agree with geography-based subspecies assignments, several geographic regions show conflicting mtDNA signals. Our analyses support previous findings that evolutionary forces such as incomplete lineage sorting or mitochondrial capture likely confound the mitochondrial phylogeography of this species, especially in East and, to some extent, in Northeast Africa. We caution that subspecies assignments solely based on mtDNA should be treated carefully and argue for an additional standardized nuclear single nucleotide polymorphism (SNP) marker set for subspecies identification and monitoring. However, the detection of the A. j. soemmeringii specific haplogroup by a newly designed Amplification-Refractory Mutation System (ARMS) can already provide support for conservation measures.

The upper dentition of Crocidura exhibits polymorphic characters that were revealed for the first time in this study via high-resolution X-ray computed microtomography. Our analyses of 11 Crocidura species and selected Diplomesodon, Suncus and Sylvisorex species from different geographical regions and size groups revealed the most complex character states of upper dentition in the Ethiopian endemic species Crocidura yaldeni. A three-dimensionally based geometric morphometric analysis revealed the dependence of variation in skull muzzle shape on alterations in general upper dentition, such as a reduction in the number of antemolars. Principal components analysis revealed highly significant shape alterations and morphological trajectories in C. yaldeni (and more moderate ones in Suncus murinus) toward the Sorex-like morphotype in the outgroup, and less significant shape alterations in Crocidura obscurior, Crocidura phanluongi and Crocidura sapaensis with double-rooted third antemolar. Cladistic analysis based on a new data matrix for 20 species and 46 characters allowed us to determine the directions of the morphological trajectories: the apomorphic state of the most complex antemolars of C. yaldeni is associated with deviating skull muzzle shape changes, which we determined to be attributable to neomorphosis, and the less significant alterations in the shape of other Crocidura with complex antemolars are attributable to regional adaptation.

The article proposes a new approach to comparing accounts of the social media “VKontakte” and “Instagram” to determine those accounts which belong to the same user. The approach is based on the comparison of graphic content; the novelty of the approach consists in combining several methods for matching graphic content, also for the first time a method is proposed for matching accounts of the mentioned social media. The proposed method combines three methods of matching graphic content: by extracting the faces of the account users from the photos in the account and matching them, by matching all faces in both accounts, and by pairwise comparison of images to determine the same images in both accounts using the perceptual pHash method. The described method was tested on a dataset of more than 8,000 pairs of accounts. According to the results of the experiment, the value of the F1-score metric reached 0.87. The practical significance lies in automating the comparison of user accounts in various social networks by implementing of the developed algorithm in the prototype of the software package. A further direction for research lies in expanding the set of data and attributes of profiles considered for comparison. The results can be introduced into a software package for the analysis of the security of a user of information systems against social engineering attacks. It seems promising to combine the obtained findings with account matching methods based on the structural similarity of social graphs.

Based on new molecular data for mitochondrial (Cyt b) and nuclear (IRBP,RAG1) genes, as well as an extensive analysis of morphological material, we accessed actual species taxonomy and relationships among Asian red-cheeked squirrelsDremomysdistributed in eastern Indochina and southern China. Phylogenetic analyses demonstrated that Asian red-cheeked squirrels, which are currently attributed toD. rufigenis, are not homogenic but instead consisted of two independent species-level clades—northern and south-central. The latter clade was additionally subdivided into two highly divergent clades based onCyt bgene phylogeny. In spite of multidimensional statistics approach applied (PCA) only minor cranial differences were found between populations of study what lay a basis to treat it as cryptic species. Based on our findings, red-cheeked squirrels inhabit northern Vietnam and southern China, which are usually attributed toD. rufigenis, should be treated as distinct genetic speciesD. ornatusThomas, 1914. In ones turn, based on its peculiar external morphology we can attribute the specimens from southern and central Vietnam toD. rufigenisproper and treat them asD. rufigenisfuscusBonhote, 1907 andD. r. laomacheBonhote, 1921, respectively.

The development of foreign economic activity and the increase in exports and the share of non-primary non-energy exports are the most important tasks for the development of the regional economy. The research contains a retrospective analysis of trade and economic cooperation in the Samara region and an assessment of changes influenced by significant political, economic and global events and phenomena. It has been shown that significant developments since the beginning of the XX century (the global financial crisis of 2008 and the sharp fall in oil prices in 2009, 2015, the imposition of sanctions in 2014, the COVID-19 crisis) have necessitated and state policy has created the conditions for a consistent shift towards the expansion of non-primary non-energy exports. The evaluation showed that the Samara regions economy has entered a new stage of increasing the positive contribution of non-primary non-energy exports. The regions economy has successfully adapted to the impact of economic sanctions, reducing the role of European countries as an export destination and diversifying its export portfolio towards Asia and Africa. The authors have identified fast-growing five-year export countries for which special promotional policies have been proposed. The research has identified certain European countries that, despite the pan-European sanctions policies, are actively recovering exports from the Samara region, as well as European countries where local friendly policies can encourage mutual trade growth. The conclusion was reached that more attention should be paid to the border Kazakhstan, which has recently witnessed a trend towards the cooling of mutual relations at the national level. However, the neighborhood with Kazakhstan makes it impossible to ignore the policy of strengthening friendly relations in order to increase the economic stability and security of the border region of Samara.

The aim of the study is to assess the main radiation-hazardous factors that determine the effective dose of personnel during underground uranium mining at the Priargunsky Industrial Mining and Chemical Association, and to summarize the data of the radiation control of the enterprise for 2016-2020. The main factors that create personnel dose loads are: the volume activity of short-lived daughter products of radon decay in the air, the dose rate of external gamma radiation, and the volume activity of long-lived alpha-emitting radionuclides of the uranium-radium series in industrial dust. Information on the structure and values of individual effective doses of workers is presented. Recommendations for improving the radiation monitoring system are given.

The Altai weasel, Mustela altaicaPallas 1811 (Carnivora: Mustelidae), is widely distributed across open landscapes of central and eastern Asia. The geographical variation in skull morphology and taxonomic composition of this small mustelid remain poorly known. Based on extensive sampling in museum collections, we analyzed morphometric variation in 23 cranial characters of 232 M. altaica specimens from across its entire range. The multivariate analysis (nonmetric multidimensional scaling) revealed a geographical pattern of variation in cranial size and shape. Based on this result, two morphological groups have been comprehensively characterized. Weasels of the first group differ from those of the second in having larger skulls, wider neurocrania, elongated toothrows, and larger carnassial teeth, as well as in sexual size dimorphism. The first group is confined to the southwestern part of the species range (Tien Shan Mountains, Pamir, the Himalayas, and southern Tibet). The second group is widespread from the foothills of Tien Shan in the west to Khingan and Manchuria in the east. The distribution of the two groups of M. altaica is consistent with the “Out-of-Tibet” hypothesis. The first group presumably can be attributed to M. a. temonHodgson, 1857, whereas the second group can be treated as nominotypical M. a. altaicaPallas, 1811.

The effect of the type of milk clotting enzyme (MCE) on the duration of milk coagulation, parameters of the composition of whey and cheeses, and the output of cheeses in the production of soft cheese such as “Lyubitel'skiy” were investigated. Three brands of MCE of different origins were investigated: Marzyme® (MCE of microbial origin based on Rhizomucor miehei protease), Naturen® (calf rennet) and Chy-max® M (recombinant camel chymosin). It was established that MCEs had different ratios of milk clotting activity (MCA) to total proteolytic activity (PA). It was determined that the MCA/PA ratio, which characterizes the degree of specificity of the MCE action with regard to kappa-casein, in Chy-max M 1000 is ~7 times higher than that of Naturen and ~50 times higher than that of Marzyme. Such differences did not lead to a negative effect when using the Marzyme preparation in the production of soft cheeses. There were no statistically significant differences in the amount of dry matter loss of the curd into the whey, physicochemical parameters and output between the variants of cheeses made with the studied brands of MCE. Shorter duration of milk clotting (16.5 min) was observed with Marzyme than with MCE of Naturen (20.5 min) and Chy-max M (22.5 min). The results of the coagulation duration were explained by the stimulation of the activity of MCE of microbial origin, by the pH level of milk before coagulation (below pH 6.4). It was shown that modern MCEs of microbial origin could be recommended as a cost-effective replacement for more expensive rennet and recombinant chymosins in the production of soft and fresh cheeses.

A significant reduction in the cost of controlling a single-cylinder engine with positive ignition for small-scale mechanization can be achieved by replacing material sensors with virtual ones. The information required for control can be extracted from the crankshaft speed. The reliability of the mixture composition estimate based on the intracycle variation of the crankshaft angular velocity depends on many factors, including the installation accuracy of the position sensor of the given shaft and the synchronization disk or other element for determining the angular position of the crankshaft in the selected reference system. The properties of a single-cylinder engine are revealed. These make it possible to significantly weaken the effect of the displacement of the angular scale on the accuracy of assessing the composition of the mixture by the kinematic parameters of the engine operation, as well as to evaluate the displacement itself. The experiments were carried out on a general-purpose engine Honda iGX440 with a displacement of 0,44 liters, equipped with an experimental electronic control system for fuel injection, ignition and throttling. The hydraulic brake was used as the load. The displacement of the angular scale can be determined in various ways: by the deviation of the phase of the harmonic of the kinetic energy of the crank mechanism of any observed order at the extremum of the dependence of this phase on the ignition timing, all other things being equal; by the shift of the derivative with respect to the ignition timing of the specified dependency; by the shift of the dependence of the difference of this phase and the ignition timing from the latter; by the deviation of the phase of the harmonics of the kinetic energy of the crank mechanism of higher orders at the ignition timing, leveling the effect of the displacement of the scale on the phase of the fundamental harmonic of the kinetic energy of the crank mechanism. Refinement of the position of the crankshaft by evaluating the displacement of the scale by the proposed methods will preserve the necessary accuracy of control of the ignition advance angle on single-cylinder engines while increasing the tolerance for the installation of elements for determining the angular position of the crankshaft.

The purposeof this study is to study the modernization of the model of an attacker’s social engineering attack on a user, taking into account a wider range of factors influencing the success of a social engineering attack associated with the principles of social influence.Methods. To achieve this goal, the approaches to social influence and the components of social influence were analyzed. An integrated circuit of social influence is built, grounding in the context of socio-engineering attacks.Results. A model of social influence is proposed, built in the context of an attacker’s social engineering attack on a user. A new interpretation of the term user vulnerability in the context of information security has been proposed.Conclusion. The result obtained forms the potential of filling the user and attacker models with specific vulnerabilities and competencies, which will lead to a more accurate assessment of the success of the attacker’s social engineering attack on the user, due to the aggregation of information from incidents that have occurred.

Background. Prediction of the new coronavirus infection (COVID-19) spread is important to take timely measures and initiate systemic preventive and anti-epidemic actions both at the regional and state levels to reduce morbidity and mortality.Objective: to develop a model for short-term forecasting of COVID-19 cases and deaths in the Russian Federation.Material and methods. The data for the model training were collected from the Stopcoronavirus.rf and Johns Hopkins University portals. It included 13 features to assess the infection dynamics and mortality, as well as the rate of morbidity and mortality in different countries and certain regions of the Russian Federation. The model was trained by the CatBoost gradient boosting method and retrained daily with updated data.Results. The forecast model of COVID-19 cases and deaths for the period of up to 14 days was created. The mean absolute percentage error (MAPE) estimate of the model’s accuracy ranged from 2.3% to 24% for 85 regions of the Russian Federation. The advantage of the CatBoost machine learning method over linear regression was shown using the example of the root mean square error (RMSE) value. The model showed less error for regions with a large population than for less populated ones.Conclusion. The model can be used not only to predict the pandemic of the novel coronavirus infection but also to control and assess the spread of diseases from the group of new infections at their emergence, peak incidence, and stabilization period.

Aim. To introduce the scientific community to the main results of the international scientific and practical conference “National Identity and Patriotism in States in the Conditions of International Crises” which was held on October 28, 2022 and organized by the Department of Comparative Political Science of the Faculty of Political Science of Lomonosov Moscow State University with the support of the electronic network publications “Bulletin of the Moscow Region State University”.Methodology. This article presents the abstracts of the speeches of the conference participants who devoted their reports to the problems of national identity and patriotism. The authors were researchers from Moscow State University named after M. V. Lomonosov, INION RAS, Institute of Sociology FNISTs RAS, Northern (Arctic) Federal University named after M. V. Lomonosov (Arkhangelsk), Eurasian National University named after L. N. Gumilyov (Republic of Kazakhstan), University of Mumbai (Republic of India), University of Tair Recep Tayyip Erdogan (Republic of Turkey).Results. Using materials from Russia, Kazakhstan, Turkmenistan, Georgia, Belarus, Latvia, China and the Republic of Korea, the speakers showed a wide range of problems of national identity and patriotism. The main attention was paid to the topical issues of the formation of national identity and patriotism, the specifics of national identity in Russia and post-Soviet countries, the impact of stigmatization that fragments national identity and marginalizes the discourse of patriotism.Research implications. The published materials are of significant theoretical and practical importance in ensuring the sovereignty of Russia and other states, preserving and developing national identity and patriotic education of citizens under the influence of destructive socio-political technologies. The conclusions and recommendations of the researchers can contribute to the solution of urgent political, educational and educational problems.

There are limitations to the use of pneumatic drives in systems where the position of the parts of the working equipment need to be fixed, for example in systems for dosing bulk materials. The methods for fixing the position of the pneumatic cylinder rod are reviewed. A design of a pneumatic drive is proposed where the rod is fixed by a lockable mechanical transmission built into the pneumatic cylinder, which allows the output unit to be fixed in a certain number of fixed positions in conditions where the rod is prevented from rotation by the working equipment.

The spectrophotometric method for measuring protein content can be used to evaluate the degree of proteolysis in cheeses. At a wavelength of 280 nm, tryptophan and tyrosine are absorbed, a high amount of them is found in casein, the main protein of cheese mass. It was found that the value of the absorbance coefficient of the solution of proteins extracted from flavoring additives with cheese flavor (FA) and cheeses depends on the degree of proteolysis of proteins in the cheese mass and differs in FA and different types of cheeses. The highest absorbance coefficient is observed in the FA samples A1%1cm = 10.30, in which from 65 to 81% of the protein is converted into a soluble state. In cheeses, the degree of proteolysis is from 23 to 33%, and the absorbance coefficient of solution is from 1.1 to 2.4 (with the exception of Cheddar cheese), which indicates an incomplete transition of amino acids absorbing radiation at 280 nm into the extract released from cheeses. Using the spectrophotometric method, the results of measuring the content of soluble protein in cheeses and FA, strictly correlating with the results achieved by the Kjeldahl method (R2 > 0.81), can be obtained. To get reliable results of evaluating the content of water-soluble protein in cheeses, it is necessary to carry out measurements on a sample of cheeses belonging to the same species group, having the same specificity of proteolysis and slightly different absorbance coefficient between samples within the instance.

Major histocompatibility complex (MHC) genes have been widely studied to assess the immunological fitness and evolutionary adaptation of animal populations. Among the Canidae, the raccoon dog’s adventurous nature, omnivorous behavior, and high variability of intracellular pathogens make it ideal to study selection on MHC class I in a non-model canid species. Here, we examined allelic diversity and evolutionary patterns of MHC class I genes in the raccoon dog (Nyctereutes procyonoides). We identified 48 novel MHC class I alleles from 31 raccoon dogs from Japan and Russia. Some alleles were geographically restricted, whereas others were widely distributed across the species’ range. The rate of non-synonymous substitutions was greater than that of synonymous substitutions for both exon 2 and exon 3 encoding α1 and α2 domains, respectively, in the α chain of the MHC class I protein. Positively selected sites at the amino acid level were evident in both the α1 and α2 domains, and a recombination breakpoint was found in exon 3. Bayesian phylogenetic trees showed no evidence of trans-species polymorphism (TSP) with alleles from carnivoran species in other families but did detect TSP between raccoon dogs and the domestic dog, Canis familiaris, indicative of long-term balancing selection in canids. Our results indicate that the extensive allelic diversity of MHC class I in Japanese and Russian raccoon dogs has been influenced and maintained by pathogen-driven positive selection, recombination, and long-term balancing selection. Supplementary Information The online version contains supplementary material available at 10.1007/s13364-021-00561-y.