Tomsk State University Research Articles

Images of camels on a mammoth tusk from West Siberia

This study introduces the engravings on a mammoth tusk from the lower reaches of the Tom River in West Siberia. The tusk was found in 1988 during construction works and was later transferred to the Tomsk State University, but it remained almost unknown to specialists until now. Radiocarbon dating by AMS reported the age of the tusk as 13,100–13,005 Сal BP (95% confidence level). The surface of the tusk is engraved with images of two-humped camels arranged in two pairs. In addition, arrows and wounds within the contours of the animals can be seen. The comparative analysis of the stylistic features of the camel figures shows that they correspond to the age of the tusk itself, making them, at present, the oldest camel images in Asia. The discovery of the engravings in this region is consistent with the theory of mobile population groups moving to western Siberia from the periglacial steppe to the south in the Late Upper Paleolithic.

Metal‐Ceramic Composites for Photocatalytic Oxidation of Diclofenac in Aqueous Solution

AbstractPhotocatalytic activity of metal‐ceramic composites synthesized by self‐propagating high‐temperature synthesis (SHS) is investigated in the processes of degradation of diclofenac (DCF). Optical properties of the composites were studied, and the band gaps of ceramic matrix semiconducting components were calculated from the absorbance spectra. The effect of the phase composition, UV irradiation duration, the nature and quantity of the activator (H2C2O4 and H2O2) on the degree of oxidation destruction was investigated. The best catalytic performance (98–99 % DCF degradation) was achieved with the combination of heterogeneous boron nitride and SiAlON based composites and a homogeneous photo‐Fenton system. However, DCF decomposition with a minimum number of intermediates was achieved using boron nitride‐based composites.

Preface

In this Volume are published the papers of the IX All-Russian scientific Conference with international participation on Continuum Mechanics and Celestial Mechanics – CICMCM’2019 held in Tomsk (Russia) November 18-20, 2019. The current event is the annual pre-anniversary meeting in the field of continuum mechanics and celestial mechanics at the Tomsk State University. This time the conference was attended by more than 100 scientific groups from Moscow, St. Petersburg, Nizhny Novgorod, Saratov, Tomsk, Birobidzhan, Izhevsk, Novosibirsk, Kaliningrad and other cities.The conference was organized by the Physical and Engineering Faculty and Research Institute Applied Mathematics and Mechanics at Tomsk State University (RIAMM) engaged in research in these particular areas. A lot of the scientific results were obtained using domestic noncommercial software packages and experimental facilities. Almost every third report is supported by various scientific Foundations, including the Russian Foundation for Basic Research (RFBR) and the Russian Science Foundation (RSN). Centers for Collective Use, including supercomputer Skyf-Cyberia are increasingly being used by many authors.Current volume contains 25 articles and is already the third it published in IOP Publishing. Articles of other participants will be published in scientific journal Works of Tomsk State University. Physics and Mathematical Series. The edition is available in open access and indexed Russian Science Citation Index. I would very much like for the scientific research published in the volume to receive an impetus for development by conducting joint work in the framework of the European and Russian scientific Foundations.List of Logos, Conference Chair, Editor-in-Chief are available in this pdf.

Reproductive biology of a rare species Begonia ludwigii in greenhouse conditions of the Siberian Botanical Garden of Tomsk State University

The paper presents the results of a reproductive biology study and the Begonia ludwigii seasonal development rhythm - a species classified by the International Union for Conservation of Nature as a rarity category EN (endangered species). The studies have shown that when cultivated in the Tomsk State University Siberian Botanical Garden greenhouse conditions, this species has high potential seed productivity (about 75,000 ovules per inflorescence), high fertility and pollen viability, but at the same time low true seed productivity (seed rate not more than 27%). It was established that the Begonia ludwigii seeds, in the greenhouse conditions, are tied to heterogamous pollination due to the absence of pollinating insects. The use of xenogamous artificial pollination increased the coefficient of seed productivity by almost 3 times. The paper also describes the full seasonal development rhythm, flowering biology, biomorphological features of pollen and seeds.

History of floristic studies in Abakan

Abakan is a capital of the subject of the Russian Federation, the Republic of Khakassia. The aim of the paper is to identify the history of botanical research on the territory of Abakan in the XX-XXI centuries. The floristic studies were carried out by advanced botanists, scientists of educational institutions (Tomsk State University, Krasnoyarsk State Pedagogical University named after V.P. Astafyev, Khakass State University named after N.F. Katanov) and scientific institutions of Siberia (Central Siberian Botanical Garden of SB RAS, etc.). The historical information collected from publications, route information provided by flora researchers, herbar labels, field diaries and herbarium reports is arranged in chronological order. The early history of the vegetation cover study of Krasnoyarsk Territory and Khakassia (from 1627 to 1954) is described in detail in the work of L.M. Cherepnina, further it is described in the works of N.N. Tupitsyna and others. In the XXI century the floristic studies were continued by representatives of the three scientific schools. The Tomsk school (TSU) is presented by A.L. Ebel, A.I. Pyak and others, the Novosibirsk school (TSSBS SB RAS) is presented by D.N. Shaulo and others and the Krasnoyarsk school (KSPU named after V.P. Astafiev) is presented by E.M. Antipova, T.M. Zorkina, O.P. Chebotareva. This school has a leading role in a special study of the Abakan flora.

PRO ET CONTRA. LECTURERS OF TOMSK AND TYUMEN UNIVERSITIES ON THE ADVANTAGES AND DISADVANTAGES OF THEIR PROFESSION

This article discusses the results of a field study conducted in 2019 at Tomsk State University (TSU) and Tyumen State University (TyumSU). The purpose of the study is to investigate the motivations behind educators’ choice of their profession and the aspects they say as its advantages and disadvantages. Methodologically, the study is based on 43 in-depth interviews with lecturers of TSU and TyumSU. These universities are located in Siberian cities and are among the group of the leading higher education institutions in Russia. The study shows that the lecturers associate the benefits of work at the university with the opportunities provided by the ‘5-100 Project’ to attain the world standards; good working conditions; prestige of work at a reputable university; stability of university employment; feeling of belonging to the academic; and so on. Most educators are dissatisfied with such aspects of university work as bureaucratization; redundancies; short-term contracts; the lack of transparency and inefficiency in funds distribution; and irregular working hours. We found that despite some divergence of views, the faculty of the TSU and TyumSU share a lot of opinions on the advantages and disadvantages of university work. Thus, the cases of the two Siberian universities provide us with the insights into a larger picture of the Russian system of higher education. These findings can be useful for HR services of universities for recruiting and retaining personnel.

МЕЗОМАСШТАБНАЯ МЕТЕОРОЛОГИЧЕСКАЯ МОДЕЛЬ TSUNM3 ДЛЯ ИССЛЕДОВАНИЯ И ПРОГНОЗИРОВАНИЯ СОСТОЯНИЯ МЕТЕОПАРАМЕТРОВ ПРИЗЕМНОГО СЛОЯ АТМОСФЕРЫ НАД КРУПНЫМ НАСЕЛЕННЫМ ПУНКТОМ

The paper describes the mathematical formulation and numerical method of the TSUNM3 high-resolution mesoscale meteorological model being developed at Tomsk State University. The model is nonhydrostatic and includes three-dimensional nonstationary equations of hydrothermodynamics of the atmospheric boundary layer with parameterization of turbulence, moisture microphysics, long-wave and short-wave (solar) radiation, and advective and latent heat flows in the atmosphere and at the boundary of its interaction with the underlying surface. The numerical algorithm is constructed using structured grids with uniform spacing in horizontal directions and condensing to the Earth surface in the vertical direction. When approximating the differential formulation of the problem, the finite volume method with the second order approximation in the spatial variables is used. Explicit-implicit approximations in time (Adams–Bashforth and Crank–Nicolson) are used to achieve second-order accuracy in time. The paper presents results of numerical forecasting of the main meteorological parameters of the atmosphere (temperature, humidity, wind speed and direction) and precipitation in different seasons in the Siberian region. The models were tested with the help of observations obtained using the Volna-4M sodar, MTR-5 temperature profile meter, and Meteo-2 ultrasonic weather stations of the Atmosfera Collective Use Center. The improved TSUNM3 model is shown to adequately reflect the precipitation time and intensity. However, in some cases, the times of its beginning and end do not always coincide, the difference can reach several hours. The precipitation phase state is reflected reliably. Over 70% of precipitation cases are confirmed by numerical calculations. The model satisfactorily predicts temperature and humidity characteristics. The quality of the precipitation forecast model is comparable to the modern mesoscale models, such as the Weather Research and Forecasting (WRF) model.

Determination of Е102, Е110, Е124, Е131 synthetic dyes in yogurt using the solid-phase spectrophotometry

Tartrazine E102, Yellow Sunset E110, Ponso 4R E124 and the Patented Blue E131 food synthetic dyes solid-phase extraction from yoghurts and biokefirs in a transparent polymethylmethacrylate matrix as a solid extractant was studied. The analytical signal was formed due to the accumulation of the dye in the volume of the polymer matrix without violating the transparency, and this corresponded to the wavelength of the maximum absorption of the corresponding dye. The sorption mechanism was based on the protonization of the carbonyl groups of PMM in the acidic media, and, as a result, the optode surface became positively charged. Therefore, the sorption of the R ± form of the E131 dye and the azo dye anions occurred by the positively charged PMM surface. The effectiveness of the proposed approach was shown for the identification and determination of the 2 food-grade synthetic dyes content using the visual and spectrophotometric methods. The optimal conditions for the analysis corresponded to pH <3, the duration of dye extraction into the polymer matrix was 20 min, the range of the detected concentrations was 0.2–40.0 mg / kg with the detection limit of 0.05 mg/kg, and an excess of sweeteners and preservatives did not significantly affect the results of the analysis. The results of the determination of the listed dyes were demonstrated in the current work for the case of individual and group presence of dyes in biokefirs and yogurts. The proposed technique is simple in execution and could be carried out using the standard spectrophotometric equipment. The advantage of the developed method for the determination of artificial dyes in comparison with the method of spectrophotometric determination with liquid extraction is a significant increase in the sensitivity of determination due to the accumulation of analyte, the exclusion of turbidity of an aliquot and the absence of dye loss due to its transition into the supernatant, and then into the solid phase of the matrix. Keywords : colorimetric sensor, solid-phase spectrophotometry, polymethylmethacrylate matrix, synthetic food colorant, dairy product DOI: http://dx.doi.org/10.15826/analitika.2020.24.1.002 A.A. Dudkina 1 , N.V. Saranchina 1 , T.N. Volgina 1 , N.A. Gavrilenko 2 , M.A. Gavrilenko 1 1 Tomsk Polytechnic University, 30 Lenin Ave, Tomsk, 634050, Russian Federation 2 Tomsk State University, 36 Lenin Ave, Tomsk, 634050, Russian Federation

Assessment of the success of the introduction of some rare plant species in the Siberian Botanical Garden of Tomsk State University

About 300 species of natural flora are currently in the collection of the laboratory of rare plants of the Siberian Botanical Garden of Tomsk State University (TSU). 6 species of rare plants of the natural Siberian flora, included in the Red Book of the Tomsk Region, were the objects of this study: Aconitum anthoroideum DC., Allium obliquum L., Erythronium sibiricum (Fisch. et C.A. Mey.) Krylov, Potentilla erecta (L.) Raeusch., Primula macrocalyx Bunge, Thymus marschallianus Willd. Evaluation of their successful introduction was carried out using scales proposed by various authors. Its own unified scale for the introduction of rare and endangered plants of the natural flora of Siberia has been developed. It was established on the basis of the analysis that the species studied upon introduction into the southern taiga subzone of Western Siberia belong to medium resistant (Thymus marschallianus), resistant (Aconitum anthoroideum, Allium obliquum, Erythronium sibiricum, Potentilla erecta) and highly resistant (Primula macrocalyx).

Международный обмен: особенности адаптации иностранных студентов в процессе обучения в российской вузовской системе (на примере Томского государственного университета систем управления и радиоэлектроники)

The article focuses on the multi-ethnic environment of the University, which reflects both multi-vector global and local processes and specificity of educational practices affecting the relationships in the University eco-environment. The authors consider the processes of adaptation of international exchange students in Tomsk State University of Control Systems and Radioelectronics (TUSUR) and the importance of intercultural interaction within these processes. Special attention is given to the harmonization of the University interethnic environment, the formation of friendly barrier-free interaction, which is possible because of the systemic work of educational process participants. The object of the research is the adaptation and intercultural communication in the student environment, with the focus on the specificity of adaptation of international exchange students. The authors draw on the theory of intercultural communication and employ methods of sociological survey and mathematical statistics. The survey, conducted in the fall of 2019 among 120 first-and second-year students from 36 countries with the use of a spontaneous sample type. The respondents were offered a questionnaire aimed at identifying the most urgent problems of adaptation in TUSUR. The survey resulted in a review of the challenges related to the adaptation of foreign students to new conditions in the host community. The results of the research bring to light new sociocultural approaches to the work with foreign students and can be used to optimize the interethnic interaction activities of educational system agents.

КОММУНИКАТИВНАЯ СТРАТЕГИЯ САМОПРЕЗЕНТАЦИИ В ЖЕНСКОМ ДИАЛЕКТНОМ ДИСКУРСЕ (НА МАТЕРИАЛЕ АВТОБИОГРАФИЧЕСКИХ РАССКАЗОВ)

The article examines the communicative strategy of self-presentation in female dialect discourse. Female dialect discourse is understood as a gender-marked type of dialect discourse. On the one hand, it incorporates all the features of dialect discourse; on the other, it has a number of features due to the gender of the subject. The sources of the study were oral autobiographical stories recorded during dialectological expeditions organized by the staff of Tomsk State University from 1946 to the present time in the areas where Russian old-timer dialects of the Middle Ob region are in use. The description of self-presentation strategy tactics in the female dialect discourse includes the following stages: identification and typification of the main tactics; analysis of their content; description of their linguistic expression. Based on the nature of the data provided (presence or absence of a subjective evaluative component), the authors identified the key tactics implementing the strategy of self-presentation: transferring objective information and transferring subjective information. The tactic of transferring objective information about oneself involves the transfer of factual information of a logical nature, which is based on facts: age, marital status, presence/absence of children, profession, place of residence, etc. The tactic of transferring subjective information contains the respondent’s evaluation of their appearance, character traits, intellectual level, life experience, description of the emotional state, interests, demonstration of attitudes. A positive impression of oneself in female dialect discourse is verbalized through the creation of a worthy image that corresponds to social and moral norms. Women demonstrate the following character traits and life principles: diligence, honesty, decency, calm temper, cleanliness, hospitality, negative attitude to alcohol, etc. Life values and principles are expressed through a positive description of close relatives, contrast with other people, negative evaluation or condemnation of actions and moral qualities of other people. The transmission of negative information about oneself is associated with evaluations of one’s intelligence, memory, speech abilities, appearance, age-related changes, as well as the informants’ belonging to rural culture, low educational level, lack of qualifications and profession. The communicative self-presentation strategy tactics in female dialect discourse are verbalized using multilevel linguistic means: evaluative vocabulary, metaphors, comparisons, numerals, adverbs, and various types of statements.

Всеволод Иванов. Корреспонденции из газеты «Вперед» (август – сентябрь 1919 года)

The article precedes the publication of 14 newly found correspondences of the classic of Russian literature of the 20 th century Vsevolod Ivanov (1895–1963). All of them were published in August – September 1919 in the mobile front-line newspaper “Vperyod” and are connected with the history of plots and stories of the writer about the Civil War in Siberia, first of all, with his famous story “Armored Train 14-69”. The publication fills in the gap associated with the incompleteness of the set of the newspaper “Vperyod” in the repositories of Moscow and St. Petersburg. The gap was filled thanks to the newspaper fund of the Scientific Library of Tomsk State University. The political and literary contexts of Ivanov’s work in the newspaper “Vperyod” are recreated, his relationship with the editor of the newspaper V. G. Yanchevetsky (1875–1954), known as the writer Vasily Yan, is described. An explanation of the changes in the views of the writer in 1919 is proposed. The poetics and genre of the published correspondence is preliminary characterized.

Вербализация концепта ЖЕНЩИНА (на материале женского диалектного дискурса)

This article is devoted to the development of a linguistic model for describing the concept WOMAN. The material is women’s dialect discourse. The sources of the material are the Tomsk dialect corpus which includes materials of expeditions organized by dialectologists of Tomsk State University from 1946 to the present days on the territory of Middle Ob dialects spread. In the article we used modeling method based on the idea of the nominative field of a concept, as well as an interpretation technique relying on analysis of contexts, and a method of quantitative calculations used in relation to units that represent the concept. Lexical and phraseological units that make up the nominative field of the concept were revealed during the research. These units were divided into the following lexical-semantic groups: 1) the general nominations of a female person; 2) age and status in marriage; 4) status in the family hierarchy; 5) anatomical and biological characteristics; 6) character traits and behavior; 7) appearance characteristics; 8) profession and work processes. Elements of different layers of the concept are revealed in each lexical- semantic group. All of them give a general picture of ideas about women. So, the basis for identifying of gender conceptualizations and stereotypes is the presence of linguistic oppositions of male and female; the presence of a large number of lexical units that reflect the status of marriage (girl, bride, young woman, wife, mistress, old woman, widow, old girl, brooch and so on); lexical pairs that are opposed to each other on the basis of evaluation “positive” – “negative” (clean, clean – dirty, mistress – disheveled, etc.). A large number of words that negatively assess certain qualities and behavior of women (gossip girl, market woman, stramovka, etc.) indicate the high requirements imposed on the woman, the condemnation of deviations from social norms. The content of the concept of WOMAN depends on the specifics of rural existence, which is based on work, the presence of patriarchal gender stereotypes, social and historical events and processes. The significance of the research is determined by the possibility of using its results for development of a new interdisciplinary scientific field – gender dialectology that studies the gender characteristics of the dialect.

“Ethno-Inclusion – Ethno-Exclusion” as a Dualistic Model of Cross-Cultural Adaptation in the University Educational Environment

The article is devoted to the problem of overcoming the contradiction between the requirements of society for inclusion in the ethno-social educational environment and providing comfortable intercultural communication. Therefore, the goal is to study "ethno-inclusion – ethno-exclusion" as a dual model of cross-cultural interaction. The study is presented as an area of scientific reflection describing the situation of interethnic interaction in the socio-cultural environment and revealing the behavioral vectors of the individual, allowing characterizing the current communicative situation in terms of the impact of extremism and negative socio-cultural transformations. The empirical base is the research conducted by the method of questioning of Tomsk state University of Control Systems and Radioelectronics (TUSUR) students in 2017. As a methodological basis adapted by the authors’ version of the method "Types of ethnic identity" G. U. Soldatova, S. V. Ryzhova was chosen. The dominant type, according to the results of surveys, was the type of "norm", suggesting an optimal balance of tolerance towards their own and other ethnic groups. The article presents the models of behavioral vectors correlating with the stages of cross-cultural adaptation process according to M. J. Bennett, that allows us to consider in detail the structure of positive ethnic identity (norm). Positive ethnic identity (norm), represented by the successive development of ethno-relativistic stages of perception of another culture, in its maximum value is defined as the stage of "integration", which is fixed among senior students. The functional stages of "recognition" and "adaptation" is of a transit nature and has fluctuating properties. In the analysis of ethnic identity, it is necessary to focus on the conceptual difference between them, integration as a normative form of cultural existence implies the presence of multiculturalism, a polyvariant image of the world and the multidimensionality of personal experience. The authors rely on their own system of indicators of the quality of the ethno-social educational environment. The materials of this article lay the foundations of interdisciplinary approaches to the formation of theoretical and methodological support of "ethno-inclusion" in the University environment and can be used in the educational process in the preparation of courses on intercultural communication, cultural studies, psychology, philosophy and other fields of knowledge related to the construction of a comfortable environment of cross-cultural interaction.

“Ethno-Inclusion – Ethno-Exclusion” as a Dualistic Model of Cross-Cultural Adaptation in the University Educational Environment

The article is devoted to the problem of overcoming the contradiction between the requirements of society for inclusion in the ethno-social educational environment and providing comfortable intercultural communication. Therefore, the goal is to study "ethno-inclusion – ethno-exclusion" as a dual model of cross-cultural interaction. The study is presented as an area of scientific reflection describing the situation of interethnic interaction in the socio-cultural environment and revealing the behavioral vectors of the individual, allowing characterizing the current communicative situation in terms of the impact of extremism and negative socio-cultural transformations. The empirical base is the research conducted by the method of questioning of Tomsk state University of Control Systems and Radioelectronics (TUSUR) students in 2017. As a methodological basis adapted by the authors’ version of the method "Types of ethnic identity" G. U. Soldatova, S. V. Ryzhova was chosen. The dominant type, according to the results of surveys, was the type of "norm", suggesting an optimal balance of tolerance towards their own and other ethnic groups. The article presents the models of behavioral vectors correlating with the stages of cross-cultural adaptation process according to M. J. Bennett, that allows us to consider in detail the structure of positive ethnic identity (norm). Positive ethnic identity (norm), represented by the successive development of ethno-relativistic stages of perception of another culture, in its maximum value is defined as the stage of "integration", which is fixed among senior students. The functional stages of "recognition" and "adaptation" is of a transit nature and has fluctuating properties. In the analysis of ethnic identity, it is necessary to focus on the conceptual difference between them, integration as a normative form of cultural existence implies the presence of multiculturalism, a polyvariant image of the world and the multidimensionality of personal experience. The authors rely on their own system of indicators of the quality of the ethno-social educational environment. The materials of this article lay the foundations of interdisciplinary approaches to the formation of theoretical and methodological support of "ethno-inclusion" in the University environment and can be used in the educational process in the preparation of courses on intercultural communication, cultural studies, psychology, philosophy and other fields of knowledge related to the construction of a comfortable environment of cross-cultural interaction.

Implementing the Adaptive Learning Techniques

The concept of adaptive learning emerged a few decades ago, but most theoretical findings have never been put into practice, and software solutions had no significant reach for a long time due to insufficient e-learning technology development and coverage. The recent advancements of information technology allow the elaboration of complex big data analytics and artificial intelligence solutions, in adaptive learning in particular. This article investigates exploitation of adaptive learning technology and techniques.The solutions proposed allow mapping optimal individualized learning paths for students in online courses, using the ratio of the level of knowledge at course completion to time spent on the course as an optimality criterion. A genetic algorithm is used to solve this optimization problem. A model based on the speed of forgetting was applied to extrapolate the level of retained knowledge. Practical implementation of the technology proposed involves a set of tools to expand the adaptive learning opportunities of distance learning systems and a module to operate the genetic algorithm. We developed a few options of software architecture using different technologies and programming languages and either one or two servers. The solution was tested during the design of adaptive learning courses for National University of Science and Technology MISIS (NUST MISIS) and Tomsk State University of Control Systems and Radioelectronics (TUSUR).

МОДЕРНИЗАЦИЯ ИНЖЕНЕРНОГО ОБРАЗОВАНИЯ В РЕГИОНАЛЬНОМ УНИВЕРСИТЕТЕ В УСЛОВИЯХ ЕГО СТАНОВЛЕНИЯ В КАЧЕСТВЕ УНИВЕРСИТЕТСКОГО ЦЕНТРА ИННОВАЦИОННОГО, ТЕХНОЛОГИЧЕСКОГО И СОЦИАЛЬНОГО РАЗВИТИЯ РЕГИОНА: ВЫЗОВЫ И ВОЗМОЖНОСТИ

The paper discusses the problems and challenges of engineering education, aspects of its modernization in the context of project training organization at universities that is based on the principles of CDIO, focused on generating innovation and addressing the specific needs of the regional economy. In the article, the authors cite and summarize the experience of software organization in four universities that have successfully implemented and used software: Astrakhan State University, Moscow Polytechnic University, National Research Tomsk Polytechnic University and Tomsk State University of Control Systems and Radioelectronics. Information on the implementation of software in ChSU is also used. By analyzing information, the authors draw conclusions relating to the positive role of project learning (introduced and practiced in universities) for the development of regions, the necessary measures to set up software systems at universities.

Субъективная оценка (не)благополучия населения регионов РФ на основе данных социальных сетей

В статье обосновывается новый метод субъективной оценки благополучия, основанный на анализе онлайн-активности пользователей в социальных сетях. Предлагаемый метод обладает как преимуществами (быстрота исследования, небольшие затраты, масштабность, детальность полученной информации), так и определенными ограничениями (охват «цифрового населения», технические сложности при исследовании густонаселенных мегаполисов и т.д.). В статье представлены результаты эмпирического исследования онлайн-активности пользователей социальной сети «ВКонтакте». На основе полученных данных рассчитан индекс субъективного (не)благополучия для 43 регионов РФ по 19 показателям, охватывающих экономические, социальные и политические аспекты качества жизни людей. Индекс субъективного (не)благополучия строится на изучении онлайн-активности пользователей, входящих в 1350 наиболее популярных региональных и городских сообществ в социальной сети «ВКонтакте». Период исследования включает в себя весь 2018 год.&#x0D; Благодарность. Исследование выполнено при финансовой поддержке «Программы повышения конкурентоспособности Томского государственного университета» (грант № 8.1.59.2018).

Erratum to: The Possibility of Harmless Destruction of an Asteroid Threatening the Earth

Page 786, FUNDING should read as follows: This work was supported by the Russian Science Foundation (grant 18-12-00050) and the Program for Enhancing the Competitiveness of Tomsk State University.

Surface electronic structure of the wide band gap topological insulator PbBi4Te4Se3

This work is supported by the Russian Science Foundation (Grants No. 18-12-00169 in part of the density functional calculations and No. 18-12-00062 in part of the photoemission measurements) and Saint Petersburg State University (Grant ID 40990069). The support from the Academic D.I. Mendeleev Fund Program of Tomsk State University (Project No. 8.1.01.2018), the Russian Foundation for Basic Researches (Grant No. 18-52-06009), the Science Development Foundation under the President of the Republic of Azerbaijan (Grant No. EIF/MQM/Elm-Tehsil-1-2016-1(26)-71/01/4-M33), the Basque Country Government, Departamento de Educacion, Universidades e Investigacion (Grants No. IT-756-13 and No. IT1301-19) and the Spanish Ministerio de Ciencia e Innovacion (Grant No. FIS2016-75862-P) are acknowledged. J.S.-B. gratefully acknowledges financial support from the Impuls-und Vernetzungsfonds der Helmholtz-Gemeinschaft under Grant No. HRSF-0067 (Helmholtz-Russia Joint Research Group). Calculations were partly performed using computational resources provided by Resource Center “Computer Center of SPbU” (http://cc.spbu.ru) and the SKIFCyberia sup