bluuebunny/crossref_metadata_2025 huggingface dataset:
MATHEMATICAL OBJECTS, STRUCTURES AND PROOFS (INTRODUCTION TO THE SPECIAL ISSUE)
Authors:   Ural Federal University named after the first President of Russia B.N. Yeltsin, Lamberov Lev D.
Published: December 2022

The paper serves as an introduction to the issues discussed in the following articles. It raises the problem (challenge) of integration, according to which an adequate solution of a philosophical problem should simultaneously be an answer to both ontological and epistemological questions. This problem is described speculatively and by referring to P. Benacerraf’s dilemma. In addition, the problem is illustrated by com-paring classical and intuitionistic mathematics and also through interpretation of the concept of computer proof. The paper demonstrates that adequate philosophy of mathematics must simultaneously take into account the ontological and epistemological aspects of mathematics and mathematical practice. Keywords: mathematical objects, structures, proofs, subject of mathematics, philosophy of mathematics.
A.N. KOLMOGOROV’S CALCULUS OF PROBLEMS AND HOMOTOPY TYPE THEORY
Authors:   Russian Society for History and Philosophy of Science, Rodin Andrei V.
Published: December 2022

In 1932 A.N. Kolmogorov proposed an original version of mathematical intuitionism where the distinc-tion between problems and theorems plays a central role and which differs in its content from the versions of intuitionism developed by A. Heyting and other followers of L. Brouwer. In view of today’s historians and logicians, it remains a controversial point whether this distinction is to be treated as logical or Kol-mogorov’s «problems» should be regarded as propositions, provided the latter term is interpreted intui-tionistically. The popular BHK semantics of intuitionistic logic, so called after Brouwer, Heyting, and Kolmogorov and supposed to provide a synthesis of ideas of these authors, does not formally distinguish between problems and theorems and treats this distinction as contextual or purely linguistic. We argue that the distinction between problems and theorems is a crucial element of Kolmogorov’s approach and provide a logical interpretation of this distinction using homotopy type theory (HoTT). The notion of ho-motopy level of a given type in HoTT allows one to distinguish, after Kolmogorov, between problems re-duced to proving a sentence and problems that require realization of higher-order constructions. Thus, HoTT provides a support for Kolmogorov’s view on intuitionistic logic in his polemics with Heyting. At the same time, HoTT does not solve the problem of finding a constructive notion of negation applicable to general problems, which is raised by Kolmogorov in the same paper and still remains open.
ARBITRARY OBJECTS, SPECIES STRUCTURES: METAPHYSICAL MATHEMATICAL STRUCTURALISM
Authors:   Institute of Philosophy and Law of the Siberian Branch of the Russian Academy of Sciences, Khlebalin Aleksandr V.
Published: December 2022

Non-eliminative structuralism, for example that in the version of S. Shapiro, faces the problem of the so-called incompleteness of mathematical objects and the problem of permutation. The article analyzes the concept of generic mathematical structuralism developed by L. Horsten, which claims to solve these prob-lems while adhering to non-eliminativist, realist positions. The paper presents the key characteristics of the conception of specific mathematical structuralism based on the concept of an arbitrary object offered by K. Fine and the idea of generic structures. According to this conception, each arbitrary object is associated with a domain of individual objects — its values. Thus, with each arbitrary number a domain of individual numbers is associated; with every arbitrary person — a domain of individual people. An arbitrary object has properties that are common to the individual objects of the associated domain. Generic structuralism treats mathematical structures as generic structures, while mathematical objects — as arbitrary. Generic structures themselves are defined by the relation of instantiation — the relation of being in a state. As a version of non-eliminative structuralism, the concept of generic structuralism avoids difficulties encountered by other for-mulations of this position. Another interesting feature of the concept is the shift of attention from ontologi-cal to metaphysical problems, which played a secondary role in the debate about mathematical structural-ism. In this regard, we consider the problem of the independence and definiteness of arbitrary objects, which was already pointed out by K. Fine, to be one of the important problems. As applied to Fine’s concept of ar-bitrary objects, interesting results have already been obtained by means of independent-friendly logic. The application of its conceptual means, in our opinion, will make it possible to obtain metaphysical results im-portant for the structuralist philosophy of mathematics. The advantages of the analyzed concept are identi-fied in the paper, and the directions of its further development are outlined.
THEORETICAL AND IDEOLOGICAL FOUNDATIONS OF THE CHRONOTOPOLOGICAL CONCEPTION IN THE CONTEXT OF RETHINKING THE MODERN STATE OF PHILOSOPHY AND ITS CLASSICAL CATEGORICAL SCHEMES
Authors:   Perm National Research Polytechnic University, Politov Andrei V.
Published: December 2022

The subject of the study is revision of the philosophical, theoretical, and ideological foundations of the chronotopological model of being (the idea of the spatiotemporal organization of being developed by A.A. Ukhtomsky and M.M. Bakhtin) in the context of existentially oriented criticism of the modern philosophical situation and the subsequent rethinking of the dialectical and categorical schemes of classical European philosophy, to which Russian philosophical culture belongs. To date, the development of the chronotopological concept from a single term «chronotope» to a full-fledged autonomous philosophical discipline (such as phenomenology, philosophical hermeneutics, philosophical anthropology) seems im-possible without fundamental rethinking of the foundations of its not only logical but also existential con-sistency, which, in turn, is impossible without referring to the existential foundations of being of a mod-ern philosopher and modern philosophy. Existential completeness and authenticity are considered as the fundamental basis of philosophizing and philosophical conception in the struggle against existential in-completeness, alienation, and fallenness, which characterize the modern existence of human. In the con-text of the author’s version of the path of formation of the fundamental categorical base of chronotopolo-gy as an independent philosophical direction, its conceptual foundation is proposed, in which the synthe-sis of fundamental conceptual and dialectical schemes of the European philosophical tradition critically revised from an existential point of view is realized, and vectors of further concretization of the chro-notopological models of the universe, human being, social structure, cultural and historical development become possible. At the same time, the proposed scheme does not privatize or cancel other probabilistic trajectories of the evolution of the chronotope concept, which does not contradict the principle of existen-tial authenticity of the theory articulated by the study.
CULTURAL FACTORS IN TRUST FORMATION IN ORGANIZATIONS: A SOCIOLOGICAL ANALYSIS
Authors:   Perm State University, Gordeyeva Svetlana S. , Sharypova Sofya Yu. ,   Perm State University
Published: December 2022

The relevance of the study is due to the high competition among organizations, which forces managers to look for new methods of improving the performance. A high level of organizational trust is one of the most significant factors in efficient operation of companies. This explains interest in research on various factors in the formation of trust in organizations. To date, there have been published quite many works devoted to organizational and individual conditions ensuring the formation of organizational trust. Less attention is paid by researchers to cultural prerequisites such as generalized trust, social control, and the values of collectivism and individualism in society. On the basis of a theoretical review, we describe the mechanisms of trust formation through these cultural prerequisites. It was revealed that organizational trust is related to the perception of behavior by others (generalized trust), but is not identical to trust at the behavioral level. Employees can demonstrate a high level of generalized trust, but at the same time show a willingness to be vulnerable to others in joint activities. It was also found that social control in society negatively affects organizational trust as it violates informal ties and does not allow the formation of in-formal norms and rules that are important for trust. Finally, it was found that organizational trust is posi-tively associated with individualism and with a focus on collective activity (team work). The trust of col-lectivists is limited to people with close social ties, while the trust of individualists goes beyond these re-lationships. Thus, the behavioral strategy that acquires a special role is building up a positive reputation of a «good» person, which contributes to the well-being of an individual since it provides him/her with help and support from others. The formulated conclusions indicate the importance of cultural prerequi-sites in the formation of trust in an organization, which should be taken into account in empirical studies. Keywords: organizational trust, trust factors, generalized trust, social control, collectivism, individualism.
PROBLEMS OF PSYCHOSEMANTICS IN MODERN PSYCHOLOGY (INTRODUCTION TO THE SPECIAL ISSUE)
Authors:   Udmurt State University, Kozhevnikova Oksana V.
Published: December 2022

The article serves as an introduction to the issues discussed in tthe special issue. The current state of psycho-semantics as an interdisciplinary research approach to the exploration of consciousness and personality which allows to study various forms of the existence of meanings, a picture of the world, subjective meanings, im-plicit and explicit intentions, attitudes, representations is analyzed. The history of its development associated with implementing into scientific practices the semantic differential method constructed in the middle of the last century by the American psychologist C. Osgood and its modifications proposed by Russian researchers are examined. A variety of options for the implementation of research by modern Russian scholars within the framework of the psychosemantic approach are described.
THE STUDY OF THE MOTIVATIONAL STRUCTURE OF THE COLLECTIVE SUBJECT UNDER THE CONDITIONS OF THE COVID-19 PANDEMIC: A PSYCHOSEMANTIC APPROACH
Authors:   Lomonosov Moscow State University, Mitina Olga V. , Bachkala Anna P. ,   Lomonosov Moscow State University, Morozova Olga V. ,   Lomonosov Moscow State University
Published: December 2022

The pandemic has brought humans fear for themselves and their loved ones, and frustration because of changes in habitual behavior. All this led to emotional dynamics and, therefore, to changes in the motivational structure not only randomly at the individual level, but also systematically at the group level. We have developed two attribu-tive psychosemantic techniques that we used to construct operational models of motivational space based on ac-tions and judgments actual at the time of the pandemic. In two studies conducted in Moscow and Tashkent, we aimed to identify and study the motivational features of behavior during the COVID-19 pandemic. 1) In Tash-kent, the motivational space was constructed using the methodology of attribution of motives to beliefs about COVID-19. The study involved 76 respondents (38 men and 38 women) between the ages of 20 and 33 (M = 23,8, SD = 3,4). 2) The method of attribution of motives to behavior was applied in Moscow. We surveyed 112 respondents (74 females and 38 males), aged 15 to 72 years (M = 33.2, SD = 15.2). In both studies, we used a snowball sampling technique (research participants asked their acquaintances to be surveyed). The data were ana-lyzed using factor analysis. In both cases, the Safety motive was extracted as the first factor, followed by the mo-tives of Strengthening social relations and Self-Determination. The fourth factor differed: in the Tashkent sample, the motive of Distrust was extracted, and in the Moscow one, Conformism. We interpreted the results in the framework of the self-determination theory of E. Desi and R. Ryan and the motivation theory of A. Maslow
CORRESPONDENCE BETWEEN SUBJECTIVE CHARACTERISTICS AND OBJECTIVE CRITERIA OF PERSONAL MATURITY OF UNIVERSITY STUDENTS
Authors:   Udmurt State University, Kozhevnikova Oksana V.
Published: December 2022

The category of «personal maturity» is increasingly in the focus of scientific research including the ones imple-mented using experimental psychosemantic methods. The purpose of this work is to study the correspondence be-tween of subjective characteristics and objective criteria of personal maturity of students. The main hypothesis of the study is based on the assumption that subjective ideas of students about the level of their own personal maturi-ty do not coincide with its actual, objectively manifested level. While studying subjective ideas of students about the level of their own personal maturity, a specialized semantic differential technique was developed. The crea-tion of research tools of this type is carried out in several stages, including identifying of evaluation objects, iden-tifying of evaluation scales, testing of a specialized semantic differential. Empirical data obtained through appli-cation of a specialized semantic differential was processed by means of exploratory factor analysis. As a result, two factors «Subjective Position» and «Positive Attitude» were identified. Subjective characteristics of personal maturity are reflected through the position of the object «My present Self» in the semantic space of these factors. Ideas about personal maturity in students who perceive themselves as personally mature and immature are gener-ally identical as evidenced by a similar pattern of the location of most evaluated objects, however, the position of the object «My present Self» is different which allows us to distinguish two contrasting groups of respondents. According to the psychodiagnostic evaluation, students who perceive themselves as personally immature demon-strate a higher level of personal maturity: they are more responsible, independent, autonomous, etc. The presented algorithm for developing a specialized semantic differential technique can be useful for researchers studying un-conscious, latent, poorly instrumented psychological phenomena
A PSYCHOSEMANTICAL STUDY OF THE REPRESENTATIONS AND ATTITUDES OF SCHOOLCHILDREN AND STUDENTS OF THE PERM SITY AND THE PERM TERRITORY
Authors:   HB Assistance, Afanasiev Vadim G. , Solomin Igor L. ,   HB Assistance
Published: December 2022

The study was carried out in 2017 by order of the Ministry of Education and Science of the Perm Territory as part of the task of early detection of schoolchildren and students prone to the use of narcotic and psychotropic substances. Using the methodology of psychosemantic express diagnostics of motivation based on the Express computer program, 56,317 students from the city of Perm and the Perm Territory were examined. Most re-spondents were characterized by a fairly high level of emotional well-being, a wide range of interests, satisfac-tion of leading needs, a high level of self-esteem, an optimistic attitude towards the future, a positive attitude towards their family, a low level of educational motivation and a lack of interest in educational activities, a negative attitude towards drugs, risk and death.However, 7% of schoolchildren demonstrated the most positive attitude and interest in drugs, 5% of the schoolchildren characterized the topic of death as highly attractive for them, and 15% of schoolchildren feel a desire for risk and thrills. A correlation was found between indicators of general emotional distress, negative attitude to learning, positive attitude to drugs, risk and death. As a result of the least squares fit of the regression, it was found that the indicators of drug attractiveness, risk and death are directly proportional to the square of the indicator of general emotional distress. The method of psycho-semantic express diagnostics of motivation makes it possible to differentiate test subjects by the content and level of emotional relationships and to identify risk groups of schoolchildren and students characterized by an increased interest in drugs and death and a desire for risky behavior.
A CAUSAL FOOTPRINT IN INDIVIDUAL-INTELLECTUAL INTEGRATIONS. PART 2. CAUSAL CHAINS AND LONGITUDINAL MEDIATOR MODELS
Authors:   Perm State Institute of Culture, Dorfman Leonid Ya. , Kalugin Alexey Yu. ,   Perm State Humanitarian Pedagogical University
Published: December 2022

In the previous report, the authors described three possible lines of integration: theoretical and empirical joint-ly, cross-theoretical and cross-empirical. In this report, their empirical verification examines on the example of V.S. Merlin’s theory of integral individuality, D.V. Ushakov’s structural-dynamic theory of intelligence, and J. Guilford’s theory of divergent (creative) thinking. Individual-intellectual integrations derive from above the-ories. These integrations appear due to the viewpoint of a causal chain. Its operational marker is longitudinal mediator models. The purpose of the study is to examine functionally the resource and potential of the theories of V.S. Merlin, D.V. Ushakov and J. Guilford for integration at empirical level; individual-intellectual integra-tions develop following causal chains in three time periods. Longitudinal mediation models were to test with an emphasis on the transformation of the effects of previous causes into new causes. The study involved 211 students of Perm higher educational institutions, studying humanities, of which 161 girls and 50 boys aged 17 to 22 years at the time of the first measurement (M = 18.56, SD = 0.83). We tested traits of integral individuali-ty (nervous system, temperament, and personality traits), crystallized and fluid intelligence, and creative think-ing in three periods, namely, the present, the future, and the post-future. Structural modeling was the main sta-tistical methods of data analysis. Crystallized intelligence, fluid intelligence, and creative flexibility revealed their mediator part between traits of integral individuality in earlier and later measurements. Each model was fit indices. However, creative fluency and originality did not function as mediators. Rather, they acted as the environment on which longitudinal mediator models operate. The results of the study can form the background for the development of a program of comprehensive individual-intellectual integrations as the basis of the edu-cational capital of the individual.
INTERNATIONAL FACULTY IN THE CONTEXT OF INTERNATIONALIZATION OF THE UNIVERSITY OF GHANA
Authors:   University of Ghana, Csajbok-Twerefou Ildiko , Dzyadyk Yuriy. I. ,   University of Ghana
Published: December 2022

This article is devoted to the study of internationalization strategy of the University of Ghana as well as character-ization by visiting scholars of their work at the International Faculty of the University. The paper draws the boundaries between such processes as globalization and internationalization, and also defines the areas of their functioning. The authors turn their attention to the process of glocalization associated with the introduction of a local element, without which the promotion of global processes can be difficult to apply. The paper indicates the reasons for the transformations in higher education, identifies strategic goals and discusses ways to achieve these goals. The article describes the need for internationalization of universities, in general, and the University of Gha-na, in particular. Further, the paper considers priority areas related to partnerships with other universities, attract-ing and recruiting freelance specialists from foreign countries, and creating student and teacher exchange pro-grams. International university teachers from Africa and Europe were interviewed. The study highlights the par-ticular interest in recruiting of international university teachers who have taught and continue to teach at various higher education institutions around the world, and therefore are highly qualified professionals with experience. Exchange with their experiences is in demand by many universities, since, while they are accumulating their own experience in a foreign institution, simultaneously they pass it on to colleagues and students. Our article further focuses on ways that can improve activities of the University of Ghana and overcome difficulties and characteriz-es the advantages and disadvantages of the work of the faculty with students. The paper also presents the results of a survey of respondents, where the international faculty assessed their stay and teaching at the University of Ghana. The results of the applied method of interviewing the international faculty (the object of study) will be-come the key to understanding the problems and solving the issues related to the internationalization of higher education in general (subject of study). The opinions of the respondents will be made available to the manage-ment of the University of Ghana. They may also influence the educational processes of other universities, since the University of Ghana is one of the leading institutions of higher education in the country and Africa, and a leader in the internationalization of education and in modern scientific approaches to teaching
UNDISCIPLINED MUNICIPALITIES: MALFUNCTION OF CENTRALIZATION AND LOCAL AUTONOMY IN RUSSIA IN 2010S
Authors:   Perm State University, Shevtsova I. K. , Gilev А. V. ,   National Research University Higher School of Economics
Published: December 2022

The local political autonomy in Russia is extremely low. Along with the municipalities having a narrow range of powers and financial capabilities higher-level authorities control local heads. The opportunities of regional authorities to appoint and dismiss heads of municipalities, as well as strengthening of the party of power on the local level, aim at control over electoral results and policy implementation. However, existing tools of political centralization at the local level often fail. In the article, we show two scenarios of regaining autonomy by the local elites. The first one is typical for the appointed mayors, who shirk regional policies because regions cannot effectively control them by positive or negative incentives. The second scenario is typical for elected mayors, who have a political power to provide necessary electoral outcomes and bargain electoral loyalty for the benefits of their municipalities being more responsive to voters’ demands. Moreover, even weak local institutions do not only help regional authorities to consolidate local elites but also provide opportunities for local elites to struggle more effectively for their aims. The research is based on interviews with local officials, deputies and experts conducted in Sverdlovsk and Irkutsk regions in summer of 2022 as well as on media materials.
TV IMAGE OF UKRAINE AS A MIRROR OF THE RUSSIAN POLITICAL SELF AT THE FORMATION STAGE OF THE MODERN STATE IDENTITY POLICY
Authors:   Perm State University, Sursanova Iu. V.
Published: December 2022

The mass protests in Russia in 2011-2012 prompted the authorities to search for what later became known as “spiritual bonds”. One of the “spiritual bonds” is the idea of brotherhood with the post-Soviet peoples. Among them Ukraine and Belarus - are the closest choice, and if Belarus is relatively stable in relation to Russia, Ukraine is mobile. For now the Ukrainian theme dominates in television discourse. We can trace the role of the image of Ukraine at the formation stage of a modern communication strategy using content-analysis of news materials of one of the main conductors of the state identity politics - TV channel "Russia 1" at the break of the socalled "protest year" in December 2011 and December 2012. Everything is clear with the image of the enemy and the image of the partner on the Russia 1 TV channel in the year of protest: the United States and the collective West are the embodiment of everything insidious, wrong, China is a role model. The plots about Ukraine, on the other hand, reveal interesting indentitarian strategies and show the subtleties of the state political identity, raising such topics of Russian political identity as the influence of the West, the discourse of a lost power, and the European choice.
HISTORICAL SPECIFICITY OF RUSSIAN REGIONS: AN INSTRUMENT FOR THE ANALYSIS OF POLITICAL SPACE HETEROGENEITY
Authors:   Perm Federal Research Center, Ural Branch, RAS, Kiryanov I. K. , Panov P. V. ,   Perm Federal Research Center, Ural Branch, RAS
Published: December 2022

Despite the trend toward homogenization of the political space, which serves as characteristic of modern nation-states, cross-regional differences persist, and sometimes even intensify. For that reason, the question arises why some regions almost do not deviate from national political trends, while in others a specific electoral landscape, special party systems, regionalist parties develop. Explaining these differences, researchers, as a rule, rely on social-economic, cultural, geographical and historical features of the regions. At the same time, large-N comparative studies require the quantitative measurement of cross-regional differences, and it is most problematic to find indicators that reflect the historical specificity of the regions. In the article, based on a tool developed for the comparative analysis of Western European regions, an original scale is proposed for quantitative measurement of the uniqueness of the history of Russian regions - the index of the specifics of political history (ISPI). This instrument is tested on the empirical material of such manifestations of the heterogeneity of the Russian political space as the intensity of regionalism in the early 1990s and the heterogeneity of the party-electoral landscape in 2000s. The analysis finds that history matters, and the proposed index is a promising tool for cross-regional comparative studies.
Finding Polygonum arenarium Waldst et Kit. in the West Siberia
Authors:   V.P. Astafyev Krasnoyarsk State Pedagogical University, Tupitsyna Natalia N. , Khozyainova Natalia V. ,   Tyumen State University
Published: December 2022

When studying flora and vegetation of the northern forest-steppe of Armizon District, Tyumen Region, in the field season of 2017, herbarium material was collected. Determination of its species affiliation made it possible to identify it as Polygonum arenarium Waldst et Kit. - sand knotweed - of the subsection Arenaria Tzvel. of the typical section of Polygonum L. genus that was found in the south of Tyumen Region after more than a century break in a new habitat. Previously, this species had been collected here by Slovtsov I.Y. "in the vicinity of Perevalova Village..." in 1891 and by Gordyagin A.Y. "... the southern part of the Tobolsk Governorate..." in 1901 (labels of Tomsk State University). However, there are no Siberian specimens of this species in the Herbaria of ALTB, NS, NSK, TK. The research shows a new location of this very rare species in Western Siberia -“Tyumen Region, Armizon District, vicinity of Prokhorova Village, near Solonets Cemetry, 7 July, 2017", as well as a description of the halophilic plant community in which the species was found: 100 m2; cut by tracks of vehicles, the soil is wet; grass cover is uneven, the projective cover ranges from 60% to 80%; the grass stand height is 40-55 cm, the richness in species is 21: Artemisia nitrosa Weber ex Stechm. and Puccinellia tenuissima Litv. ex V. I. Krecz. (cop1) are dominant, Artemisia laciniata Willd., Chenopodium glaucum L., Limonium gmelinii Kuntze, Juncus gerardii Loisel., J. compressus Kunth, Veronica spicata L., Alopecurus arundinaceus Poir., Elymrous mutabilis (Drob.) Tzvel., Rumex pseudonatronatus (Borbas) Murb. Myosurus minimus L., Polygonum neglectum Besser., Lepidium ruderale L., Psammophil-iella muralis (L.) Ikonn grow in lower abundance (sp); Inula britannica L., Allium an-gulosum All., Agrostis tenuis Bastard ex Roem et Schult., Potentilla argentea L., Tri-pleurospermum perforatum (Merat) M. Lainz are also present (sol). Individual P. are-nariums are crowded in this plant community, in the form of one spot in abundance sp, they are in a budding phase. The knotweed population can be classified as generative and full-bodied. The nomenclative and morphological characteristics of the species are given, the species is compared to a closely related species of the same subsection P. pseudoarenarium Klokov, and to species of the close subsection Patula Tzvel. In the Siberian enclave, the species dwells in its characteristic alkaline community which convinces of the aboriginal nature of the species, however given the place of growth (near the cemetery) and the anthropogenic disturbance of the community (vehicle tracks) it cannot be ruled out that it was introduced here. It is not possible to make a final conclusion due to insufficient study of the issue.
Magnesium silicates at high dynamic loading
Authors:   Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Maevskiy Konstantin K. ,   Novosibirsk State University
Published: December 2022

Research on the dynamic compression of geological materials is important for understanding composition and physical condition of the deep interior of the Earth and other planets. It also provides some data on the interaction processes related to the formation and evolution of planets. Magnesium silicates dominate in Earth's mantle and, thus, are expected to become the major phases in rocky exoplanets. In particular, enstatite Mg2[Si2O6] and forsterite Mg2SiO4 are essential constituents of Earth's mantles. Strong emphasis is put on the phase transition possibility for magnesium silicates under study. A remarkable fact is the dissociation of Mg2SiO4 into the following oxides: MgO and SiO2 (stishovite). The experiments have been carried out at a pressure value of 33 GPa, which corresponds to that in Earth's mantle at a depth of 1000 km. In this paper, the results of modeling the shock-wave loading of enstatite and forsterite as the mixtures of quartz SiO2 and periclase MgO are presented. The proposed model assumes that the components of the mixture under shock-wave loading are in thermodynamic equilibrium. The components of the material under study are considered in a phase transition region as a mixture of low- and high-pressure phases. The model is also valid for a polymorphic phase transition region. The calculations of magnesium silicates are performed with account for the polymorphic phase transition of quartz and periclase. The results are validated using the data obtained in dynamic experiments.
A numerical study of the effect of nonisothermality on the power-law fluid flow characteristics in a sudden pipe expansion
Authors:   Tomsk State University (Tomsk, Russian Federation), Mamazova Dilara A. , Ryltseva Kira E. ,   National Research Tomsk State University, Shrager Gennady R. ,   National Research Tomsk State University
Published: December 2022

In this paper, a steady laminar non-isothermal flow of a power-law fluid in an axisymmetric sudden pipe expansion is numerically simulated. The rheological behavior of the fluid is described by the modified Ostwald-de Waele law; the apparent viscosity is an exponential function of temperature. The equations are written in terms of dimensionless stream function - vortex - temperature. No-slip conditions and zero temperature are used on the solid wall. At the inlet boundary, the velocity and temperature profiles correspond to a one-dimensional steady non-isothermal flow of the considered fluid. “Soft” boundary conditions are assigned at the outlet boundary. The formulated problem is solved using the finite-difference method. The structure of the flow through a sudden pipe expansion is shown to include one- and two-dimensional flow zones with a recirculation region occurring in the inner corner vicinity. The variation in the two-dimensional flow zone length is analyzed with respect to a power-law index and dimensionless criteria of the problem. Distributions of the velocity, temperature, and apparent viscosity are presented at various Peclet and Reynolds numbers for dilatant and pseudoplastic fluids.
Bending vibrations of a heavy horizontal composite rotating shaft limited by a cylindrical baffle
Authors:   Perm State National Research University, Pestrenin Valeriy M. , Pestrenina Irina V. ,   Perm State National Research University, Perelman Oleg M. ,   Novobur LLC, Fadeykin Aleksandr S. ,   Novobur LLC, Derkach Nikolay D. ,   Novobur LLC
Published: December 2022

Drilling of wells, especially inclined and horizontal ones, is accompanied by the intense interaction of drilling tools with the borehole walls. Inborehole impacts negatively affect the drill pipe connections, electrical connections, strength characteristics of downhole motor structural elements, etc. The impact interaction of a drilling tool with a well is experimentally studied using a test bench, where the drilling tool sample is fixed in the middle of a heavy composite shaft arranged in cylindrical roller bearings. The rotating shaft is involved in the impact interaction with a cylindrical baffle due to bending vibrations. In this paper, a beam model of the described shaft is used to study the effect of the rotation speed, gravity forces, damping, and unbalance on the shaft motion. The research is carried out numerically using the ANSYS engineering software package. It is shown that the gravity forces shift the line of centers of gravity in shaft sections, relative to which it rotates. Damping, which is proportional to the speed, provides the shaft centering. The imbalance of the shaft causes bending vibrations. The possible modes of the shaft motion and the conditions for unstable motion are revealed. The mode of the shaft motion within a cylindrical baffle that ensures a steady periodic impact interaction is determined. This interaction induces elastic waves of the acceleration, transverse force and moments in the shaft.
The limit distribution of the perimeter of a convex hull generated by a Poisson point process in a convex polygon
Authors:   National University of Uzbekistan named after Mirzo Ulugbek, Khamdamov Isakjan M. , Chay Zoya S. ,   Tashkent University of Information Technologies, Sharipova Lola D. ,   Tashkent State Transport University
Published: December 2022

In this paper, we study various functionals of convex hulls generated by the realization of a homogeneous Poisson point process in a polygon on a plane. The convex hull is a generalization of the extreme elements of the sample when estimating the carrier of the distribution; and in the multidimensional case, as an estimate of the carrier of the distribution, it retains many properties of one-dimensional estimates, such as consistency, asymptotic unbiasedness, and sufficiency. Works on the study of random convex hulls in polygons and various functionals of them are usually referred to the field of probabilistic geometry. It should be noted that studying the properties of even the simplest functionals of convex hulls, such as the number of vertices or the area, is not an easy problem (see, for example, [1-4]). This also explains the fact that before the appearance of the work of P. Groeneboom [6], the main progress in this field was achieved only in the study of the properties of the mean values of such functionals. In [6], he succeeded in proving the central limit theorem for the number of vertices of a convex hull in the case when the support of the original uniform distribution is either a convex polygon or an ellipse. The main result of this paper consists in proving that the difference between the perimeters of the distribution carrier and the convex hull converges in probability to a random variable that has a distribution different from normal, and it is asymptotically independent of the number of vertices and the area of the convex hull.
Investigation of dynamics of a region with high-order orbital resonances
Authors:   Tomsk State University (Tomsk, Russian Federation), Blinkova Evgeniya V. , Bordovitsyna Tat’yana V. ,   National Research Tomsk State University
Published: December 2022

In this paper, the regions of orbital resonances 1:5, 1:7, 1:9, 1:10, and 1:11 at the Earth's rotation speed are considered. The motion of objects is simulated using the improved software package "Numerical Model of the Motion of AES Systems" on the SKIF Cyberia cluster of the National Research Tomsk State University. The modeling is performed with account for the effect of geopotential harmonics up to a degree and order of 10, as well as the attraction of the Moon and Sun. As a result, the maps of the distribution of orbital resonance multiplets and the MEGNO maps have been obtained for each region. All the regions are examined for the presence of real objects. The obtained data show that the chaotization of motion in the regions 1:5, 1:7, and 1:9 occurs due to the superposition of other different resonances on the second component of the orbital resonance. In the regions 1:10 and 1:11, the orbital resonance does not affect the chaotization of motion. All real objects located in the regions under consideration are not exposed to the effect of orbital resonances.
Pressure calculation for a fluid flowing in a plane wedge-shaped layer with account for inertial forces
Authors:   Saint Petersburg State University of Industrial Technology and Design, Kaurov Pavel V.
Published: December 2022

The Reynolds equations are solved with account for inertial forces in a plane wedge-shaped layer using the Slezkin-Targ method. The analytical expressions determining the dimensionless longitudinal velocity, hydrodynamic pressure, and total pressure force as functions of the lubricating Reynolds number and dimensionless parameter of the problem are obtained. A new method for solving the Reynolds equations is proposed accounting for inertial forces and avoiding averaging the inertial terms with respect to the gap height. The numerical analysis of the proposed method shows that in the first and second approximations, the deviations for the total hydrodynamic pressure force in a plane wedge-shaped layer differ little from each other in the considered range of the lubricating Reynolds number for varying dimensionless parameter of the problem, but exceed the deviation obtained using the Slezkin-Targ method. The coincidence of the first approximation with the second one gives ground to believe that the proposed method is more accurate for calculating the total hydrodynamic pressure force in the fluid flow occurring in a plane wedge-shaped layer.
Simulation of the stress state in barriers made of anisotropic materials
Authors:   Institute of Strength Physics and Materials Science Siberian Branch of the Russian Academy of Sciences, Krivosheina Marina N. ,   Tomsk State University
Published: December 2022

To study the properties of anisotropic materials, a mathematical model is proposed that accounts for the anisotropy of elastic and plastic properties, as well as the anisotropy of “thermal” and “cold” components of pressure. The model is applied in a threedimensional simulation of the deformation of an HCP-single-crystal barrier under impact loading by an aluminum impactor. The numerical simulation results are obtained using the dynamic finite element method with a difference scheme modified to account for the anisotropy of “cold” and “thermal” pressure components. To simulate the anisotropy of the stress deviator in the region of elastic deformations, generalized Hooke's law is used, while in the region of plastic deformations, the Mises-Hill plasticity function (Hill48) is used with account for the anisotropy of elastic properties and anisotropy of the Gruneisen coefficient. The experimentally and numerically obtained velocity profiles of the back surfaces of single-crystal zinc barriers during the spall fracture are compared with each other. When the impact loading direction coincides with [0001] axis, the elastic precursor is not observed on the velocity profile calculated numerically, which is the same for the one derived experimentally. This effect may be explained only with the use of anisotropic pressur.
Imaginational and emotional series of a work as one of the most important tasks of a pianist's creative activity
Authors:   Tomsk State University (Tomsk, Russian Federation), Okisheva Anna
Published: December 2022

In this work, attention is paid not so much to the technical ways of translating the work, but to the search for its content. The pianist, as a rule, has access only to the musical text - a message encrypted by musical means of expressiveness, transmitted by the composer to the addressee - the listener - through large spatial or temporal distances. “Deciphering” this message and turning it into a certain sound sequence is precisely the main task of the pianist-performer, the mediator between the minds of the composer and the addressee - the listener.
Unfocused Written Corrective Feedback for Academic Discourse: The Sociomaterial Potential for Writing Development and Socialization in Higher Education
Authors: Loo Daron Benjamin
Published: December 2022

Background. There is a prevailing belief that unfocused written corrective feedback may not be suitable to promote students’ academic writing development.

Purpose. This perspective piece demonstrates how unfocused written corrective feedback reflects the principles of sociomateriality, which views learning as dynamic.

Perspectives. Unfocused written corrective feedback has the potential to support university students’ academic discourse socialization. This perspective is based on the observation that actual written corrective feedback in a classroom setting is varied and contextual, and not focused on any particular grammar form or writing feature.

Conclusion. Unfocused written corrective feedback represents an optimal approach to support university students’ awareness and engagement with variables found in their learning ecology. These variables can support students’ academic writing development.
Moroccan EFL Public University Instructors’ Perceptions and Self-Reported Practices of Written Feedback
Authors: Mamad Abderrahim , Vígh Tibor
Published: December 2022

Background. Since the 1990s, teachers’ written corrective feedback (WCF) has been recognized as vital in addressing linguistic issues or product aspects of writing. However, it is necessary to go beyond error correction and focus on written feedback (WF) that concerns other areas of process writing. Still, teachers’ thinking on these issues is often an under-explored area.

Purpose. This study aimed to explore EFL instructors’ perceptions and their self-reported practices of product- and process-based WF in the writing context of tertiary education.

Methods. The exploratory quantitative study collected data from 51 Moroccan EFL writing instructors through a self-developed questionnaire. The questionnaire items regarding perceptions and self-reported practices were valid and acceptable for factor analysis of nine subscales covering the features of product- and process-based WF, and all of them proved to be reliable. This structure allowed several comparisons during data analysis.

Results. Concerning product-oriented WF, participants perceived applying WCF and WF modes on the written text as important techniques. As part of process-based WF, most of them highly valued effective WF modes in the writing process. Regarding their self-reported practices of product-based WF, instructors stated that they often employed WF modes on the written text. Within the process-based WF, they reported using judgemental feedback and effective WF modes as their most frequent practices. The comparisons between perceptions and self-reported practices showed mismatches in four subscales, including WCF, content-based WF related to macroaspects of writing, developing evaluative judgement, and effective WF modes in the writing process. Thus, instructors admitted the importance of WF in these areas although they acknowledged applying their practices less frequently.

Conclusions. This study verified the psychometric properties of a self-constructed questionnaire, which was justified to be appropriate to explore teachers’ perceptions and self-reported practices regarding WF. The results obtained from the different subscales support the effectiveness of WCF and allow the exploration of a new conceptualisation of WF as a process.
Towards Understanding Teacher Mentoring, Learner WCF Beliefs, and Learner Revision Practices Through Peer Review Feedback: A Sociocultural Perspective
Authors: Gao Yang , Wang Xiaochen
Published: December 2022

Background. The existing literature has focused on learner perceptions or beliefs about peer review tasks over the recent decade. However, little has been known about the relationships among learner beliefs about written corrective feedback (WCF), related teacher mentoring process, and learner revision practices.

Purpose. We thus aimed at addressing the gap by exploring how teacher mentoring and learner WCF beliefs may inform learner revision practices in the peer-reviewed process.

Methods. In this mixed-method study, we included four Chinese EFL students majoring in English as the participants and collected their WCF belief survey data. We also collected their actual practice data through PeerCeptiv, an online writing and rewriting platform. In addition, we traced the teacher mentoring practices and interviewed the participants about their beliefs and practices in the peer review and back-evaluation process.

Results. Through the mixed-methods design, we reported our major findings: the student participants believed empathy and resonance was the primary advantage of peer feedback, and teacher mentoring facilitated them in understanding and performing the peer review and revision tasks; we also found the student review process consisted of evaluating, resonating, learning, and reflecting practices and the student revision process included crediting, arguing, correcting, and polishing practices.

Implications. From a sociocultural perspective, we centered our discussion on these research findings by claiming that scaffolding in different forms work together enhance learner performance and student beliefs appear in a complex manner with student actual revision practices. We also offered insights for future studies and practical implications for language teachers.
An Analytical Study of Government Measures to Mitigate the Effect of Covid-19 on Indian Economy
Authors: Chander Vikas , Garg Basu
Published: December 2022

In view of serial waves of Corona virus, this paper is an attempt to analyse the different initiatives and measures of Government to mitigate the effect of COVID 19 on Indian economy. This study is secondary data based and relevant data has been collected from reports of economic surveys GOI, World Bank reports, news papers, SOP’s issued time to time by Ministry Home Affair and Health and Family Welfare, GOI, journals and websites. Macroeconomic indicators (GDP, Unemployment, inflation rate etc.) have been used to analyze and interpret data to fulfill the objectives of the study. Of course, Government measures have mitigated the effect of pandemic significantly, but more efforts are required to heal the damage of COVID 19 completely. The findings of this study will be helpful to policy makers to assess the performance of these measures to design appropriate policies to cope with Covid-19 and such pandemics in future.