bluuebunny/crossref_metadata_2025 huggingface dataset:
The impact of employment factors on the perception of work-life balance among employees
Authors: Burkhanova Flura , Baimurzina Guzel , Turakayev Marcel
Published: December 2022

The article analyses part of the results of a survey of the population of the Republic of Bashkortostan aged 17 and over, conducted in October-November 2020 as part of the study "Quality of Employment and Human Development". The volume of the analysed subsample of employees is 898 people. It is correct for employees of the Republic by gender, age, place of residence. The subject of the analysis is the influence of labour factors on the perception of work and personal life as balanced or unbalanced among employees. The main objective of the article is to test the hypothesis that the low quality of employment contributes to the formation of a sense of imbalance and dissatisfaction with work and life in general. The results showed that the hypothesis was generally confirmed. A number of features of employment that characterise it as low quality increase the proportion of those who feel an imbalance in work and personal life. These include: work without formal employment (informal employment); work not in the specialty; negative labour practices (delays at work, working on weekends, doing work at home during non-working hours, performing work functions in a state of illness, restrictions taking care of one's health due to work). Negative subjective characteristics of labour activity also contribute to an increase in the level of imbalance between work and the rest of life: dissatisfaction with working conditions, its safety, psychological climate, technical equipment, sanitary and hygienic conditions; perception of the place of work as the one of the injustice, insecurity and as the one where it is difficult to defend one's rights; non-compliance by the employer with the terms of the employment contract. In part, the imbalance contributes to the instability of employment, the possibility of losing a job. One of the results of the study is the conclusion that the feeling of balance/imbalance is associated with subjective assessments of work and personal life, they are more negative in the group with imbalance and more positive in the group with balance. Differences are especially evident in assessments of work as bringing pleasure and moral satisfaction, in assessments of life as one in which it was possible to achieve everything that one wanted.
Confronting Pandemics: Human and Non-Human Agents in the Discourse of the Moscow Authorities on COVID-19
Authors: Bagina Yana , Zaporozhets Oksana , Govorova Anastasia
Published: December 2022

The article is devoted to the discourse of the Moscow city authorities regarding COVID-19. We believe that this discourse is closely connected with the implemented city policies, articulating and legitimising them. The empirical base of the study is news from the official website of the Mayor of Moscow and entries from the blog of the Mayor of Moscow Sergey Sobyanin. The article focuses on discursively created agents of urban life, the attitude of city authorities towards them and the relationship between them during the COVID-19 pandemic.

There are many human and non-human agents in the coronavirus discourse: government officials, townspeople, agents associated with the treatment of coronavirus (medical workers and technologies), and agents associated with the life of the city during the pandemic (infrastructure, organisations and companies, employers, education system). All of them are built around a key agent - the virus itself. Citizens as agents in power discourse are represented by a variety of categories that form two large overlapping groups. The first group is associated with the position of people regarding the disease: people with suspected coronavirus, who fell ill with varying degrees of severity of the disease, recovered, died; donors, vaccine study participants, vaccinated. Over the analysed time period, the discourse related to morbidity undergoes at least two turning points: the transition from a small number of cases to statistics disaggregated in terms of age, and from disaggregated statistics to the total number of cases with an emphasis on the number of severe cases of the disease. The second group of categories of citizens includes belonging to certain social groups, for example, an age cohort, socially vulnerable groups, workers (in general and in certain industries), schoolchildren and students, service users, public transport passengers.

Citizens are viewed by city officials as important agents involved in the fight against the pandemic. Their agency is discursively produced as a result of the interaction between themselves and the city authorities. Citizens who follow the authority rules gain agency, while those who do not follow them are deprived of it due to rare mention or omission.
On the application of the "DAY AFTER RECALL" methodology in measuring broadcasting ratings: the experience of the Republic of Belarus
Authors: Postalovsky Aleksandr
Published: December 2022

The presented article is devoted to the theoretical and methodological consideration of the research practice of implementing the methodology for measuring DAY AFTER RECALL (DAR) broadcasting, used by the national meter (СJSC MediaIzmeritel) in the Republic of Belarus. The paper reveals in detail the foundations of DAR methodological tools, describes the heuristic potential, capabilities and limitations of the described measurement method. The article also reveals the content of the main metrics (media indicators) that are used in media planning, describes the mechanism for forming a sample population used in such studies. An abstract analysis of the socio-demographic profile of the radio audience was carried out, rating indicators (share) of radio stations were identified. At the end of the article, based on the practice of implementing a radio measurement project, reasoned conclusions are formulated about the advantages and limitations of the DAR technique. It is concluded that there is no conditional universal and “ideal” way to measure broadcasting ratings, since each of the described methods has its own advantages and limitations. In these contexts, first of all, the material and organisational capabilities of a research company come to the fore when making the final choice of a method for measuring the broadcasting audience.
Karakteristik Zona Laterit Berdasarkan Data Sumur Uji di Kecamatan Bungku Pesisir, Kabupaten Morowali, Sulawesi Tengah
Authors: Arif Arif , Lama Lama , Nurfasiha Nurfasiha
Published: December 2022

Daerah penelitian terletak di Kecamatan Bungku Pesisir, Kabupaten Morowali, Provinsi Sulawesi Tengah. Pengambilan data penelitian dilakukan pada lubang sumur uji. Jarak antara titik sumur uji yaitu 25 m, dengan 5 titik sumur uji yang memanjang seluas 100 x 25 m. Dinding sumur uji kemudian di deskripsi secara langsung tiap lapisan. Informasi yang diperoleh dari pengamatan dinding sumur uji adalah warna lapisan tanah, jenis mineralisasi, tingkat pelapukan serta ukuran butir. Zona overburden didasarkan pada kenampakan fisik dari dinding sumur uji dilapangan yang umumnya banyak di jumpai bahan organic seperti akar tanaman. Secara umum dijumpai mineral seperti besi oksida, kromit, Goetit. Ketebalan zona overburden berkisar 4 - 11 m. Zona limonit umumnya sangat lunak, tersusun oleh mineral lempung. Mineral yang umum dijumpai yaitu oksida besi, seperti goetit, hematit, limonit, mangan dan talk. Kadar nikel berkisar 0,30% - 1,42% dengan ketebalan berkisar 2 - 3 m. Zona saprolit merupakan zona yang kaya akan unsur Ni dan Mg serta minim akan unsur Fe. Banyak dijumpai proses pengayaan, yang ditandai dengan munculnya mineral serpentin dan garnierit magnesit. Kadar nikel kisaran 1,7% - 3,4%. Ketebalan lapisan antara 3 - 8 m. Zona bedrock memperlihatkan rekahan dengan intensitas yang cukup tinggi dengan tingkat pelapukan dan serpentinisasi rendah, kompak, dan masif. Umumnya rekahan-rekahan yang berbentuk tidak beraturan diisi oleh mineral silika membentuk silica boxwork dan mineral garnierit.
Karakteristik Batuan Ultrabasa Di Desa Winatu Dan Kamarora, Kabupaten Sigi, Provinsi Sulawesi Tengah
Authors: Mareoli Eksel Setiawan , Puspita Riska , Ninasafitri Ninasafitri
Published: December 2022

Ultramafic rocks are found in Sigi district in the Kamarora and Winatu areas but are not mentioned in the regional geology of the Poso sheet and the Pasangkayu sheet so that it is interesting to investigate further. Therefore, it is important to conduct this research to determine the characteristics and processes of ultramafic rock formation in the Kamarora and Winatu areas of Sigi district using the Petrographic and X-Ray Fluorescence (XRF) methods. The results of this study are based on petrographic analysis of two rock samples in Kamarora Village containing olivine (60-55%), omphasite (15-10%), enstatite (5%), serpentine (10%), garnet (15-10%) ) and chlorite (5%) with the rock name lherzolite, while one rock sample in Winatu Village contained serpentine minerals (75%), olivine (15%), omphasite (5%), enstasite (5%) with serpentine rock names. The chemical composition and percentage of each element of the samples analyzed by XRF stations ST01K, ST02K, ST01W are as follows: major element SiO2 (40 – 41.1 wt %), Al2O3 (2.90 – 19.6 wt %), Fe2O3 (7 – 9.98 wt %), MgO (17 – 33.7 wt %), CaO (11.30 – 12.4 wt %), Na2O (0.147–2.11 wt %), K2O (0.0558 – 0.234 wt %) and minor elements with a content range of TiO2 (0.104 – 0.965 wt %), MnO (0.102 – 0.145 wt%), SO3 (0.0719 – 0.259 wt %), Cl ( 0.0954 – 0.360 wt %), NiO (0.0272 – 0.307 wt %), Cr2O3 (0.111 – 0.403 wt %), Co2O3 (0.0246 wt %), WO3 (0.0563 – 0.0661 wt %). Rocks formed in the type of tholeiite magma, this type of magma has a low potassium content, usually formed in subduction and non-subduction areas. Based on the results of the plot on the Pearce et al (1976) diagram, it is known that the tectonic order of rock formation is on the ocean ridge and floor or the expansion of the ocean floor.
Epidemia jako metafora preapokaliptyczna. Przypadek „Choroby Libenkrafta” Ołeksandra Irwańca
Authors: Ursulenko Anna
Published: December 2022

Metaphors are a way of understanding and expressing difficult and abstract matters. The image of a community infected with a fatal and disgusting disease is a popular medium for social criticism utilized in different cultural contexts, including the literary field. In this article, the author examines the specifics of the use of the maladic metaphor in the novel Libenkraft’s Disease by Oleksandr Irvanets. The various approaches to the issues that are the crux of the anxious and dark meaning of this text allow us to come to several conclusions. The perspective of utopian studies proves that — contrary to previous fi ndings — the novel should be classified as an apocalyptic utopia. Postcolonial criticism of the cultural representation of violence shows that Libenkraft’s Disease is one of numerous texts in Ukrainian literature that propose settling past accounts by way of revenge. The findings of René Girard and Susan Sontag allow us to confirm the dangerous closeness of the epidemic metaphor to the phenomena of symbolic violence and social oppression also in the contents of Irvanets’s novel. The confrontation between the visions included in Libenkraft’s Disease and the current situation in Ukraine prompts readers to conclude that, at least in the case of this novel, the author deserves to be called a prophet of the past.
Realismus a dekadence jako „nákaza“ v dobové řeči o literatuře 19. století
Authors: Vrajová Jana
Published: December 2022

The aim of this paper is not to analyze the thematization of diseases (whether specific or general) or contagion expressed in literary form, but to explore the ways in which the discourse of contemporary literary criticism applied imagery associated with disease to descriptions of shifting literary norms in conjunction with changing cultural and social paradigms of the time.
“An Unpleasant Book about Unpleasant Boys at an Unpleasant School”: Kipling’s Reshaping of the Victorian School Story in “Stalky & Co.”
Authors: Dobosiewicz Ilona
Published: December 2022

“Slaves of the Lamp, Part One”—the first tale of Rudyard Kipling’s Stalky & Co.—was published in 1897, forty years after the publication of Thomas Hughes’s Tom Brown’s Schooldays, a book that created a pattern followed by other practitioners of the school-story genre. The aim of the following paper is to discuss the ways in which Kipling challenged the established conventions of the Victorian school story. In contrast to his predecessors, Kipling did not set his tales in an old, established public school; he questioned the importance of sports and games in developing manly character; and refused to idolize the school traditions. His protagonists rebel against authority and do not follow the rules, but are intent on the pursuing their own interests and pleasures, and do not hesitate to venture out to explore and appropriate for themselves new spaces outside of school boundaries. An important feature of Stalky & Co. is its rejection of anti-intellectualism that characterizes many Victorian school stories. Stalky & Co. abounds in literary allusions, the protagonists are voracious readers; moreover, reading and writing are represented as essential parts of the process by which cultural maturity and authority are attained.
Ambiguity in John Donne’s “Holy Sonnet 13”
Authors: Spyra Piotr
Published: December 2022

Taking William Empson’s remarks on John Donne’s “Holy Sonnet 13” as its starting point, the article explores the superstructure of ambiguity at work in the poem, going beyond Empson’s derogatory comments voiced in his Seven Types of Ambiguity in order to pursue a structure of oscillation, which, as the argument shows, underlies the entirety of the sonnet and recurs throughout it in a number of guises. Through an overview of different Catholic and Protestant readings of “What if this present”, the article investigates how the interpretation of the text shifts with changes in understanding the sonnet’s final line, highlighting its potential for self-referentiality and the latter’s interpretive consequences. The close reading offered in the process locates itself half-way between the search for a resolution of opposites characteristic of the New Critical tradition and a deconstructionist reading which denies the existence of a thematic centre in Donne’s poem. Reflecting on its own logic and the argument it proffers, the article inquires into the difference between these two kinds of close reading, suggesting that it may be more illusory than it seems.
On the Diminutivisation of Polish Nouns: Small Is Not Always Beautiful
Authors: Tabakowska Elżbieta
Published: December 2022

Situated at the interface between grammar, semantics and discourse, the cornerstone of the cognitivist approach to language and grammar, the paper presents some interrelations between these fields. As an illustration, the author analyzes some aspects of the morphological category of Polish diminutive. Like in other Slavic languages, it is highly productive; Polish diminutivises adjectives, adverbs, pronouns and verbs, but it is the noun that undergoes the process most easily and most frequently. The analysis focuses on the most productive type of nominal structures, i.e., synthetic diminutives. The discussion is inspired by Ronald Langacker’s cognitive grammar, and it is within this framework that the analysis presented in the paper is carried out, with the aim of describing cognitive processes that underlie, and give rise to, the polysemy of diminutive structures. Analysed from the cognitivist point of view, diminutivisation can be seen as making use of the same basic cognitive mechanisms that are operative in other areas of language production and use: metonymy, metaphor and blending.
The English Auxiliary Clusters as a Case of the Grammatical Category Concentricity
Authors: Malak Janusz
Published: December 2022

The English auxiliary clusters are unique among similar clusters in Indo-European languages in their structure, which is characterized by sequentiality. The lack of any possibility of reversing the sequence auxiliaries in such clusters begs the question concerning this strict ordering as the reflection of mutual relations obtaining between grammatical categories rendered by periphrastic formations based on those auxiliaries. As will be indicated in the present article, this strict sequentiality characterizing the position of auxiliaries is the reflection of the relations between the grammatical categories signalled by periphrastic formations participating in auxiliary clusters, which is characterized by concentricity in the sense that one grammatical category is embedded in another category.
O Ormianach bukowińskich i nie tylko w listach Anny Danilewicz
Authors: Pełczyński Grzegorz
Published: December 2022

Anna Danilewicz was an activist among the Polish Armenians from Bukovina and Bukovinians themselves. After the Second World War she settled in Lower Silesia, returning to her roots and memories from Bukovina, Romania, in her publications. She was regarded as a great authority among the Armenians and Bukovinians. For many years the present author exchanged letters with her, letters now analysed in the article. They contain a lot of valuable information, unknown from Anna Danilewicz’s other writings. Worthy of note are also Danilewicz’s reflections on various matters.
P-glycoprotein (ABCB1) - weak dipolar interactions provide the key to understanding allocrite recognition, binding, and transport
Authors: Seelig Anna , Li-Blatter Xiaochun
Published: December 2022

P-glycoprotein (ABCB1) is the first discovered mammalian member of the large family of ATP binding cassette (ABC) transporters. It facilitates the movement of compounds (called allocrites) across membranes, using the energy of ATP binding and hydrolysis. Here, we review the thermodynamics of allocrite binding and the kinetics of ATP hydrolysis by ABCB1. In combination with our previous molecular dynamics simulations, these data lead to a new model for allocrite transport by ABCB1. In contrast to previous models, we take into account that the transporter was evolutionarily optimized to operate within a membrane, which dictates the nature of interactions. Hydrophobic interactions drive lipid-water partitioning of allocrites, the transport process’s first step. Weak dipolar interactions (including hydrogen bonding, π-π stacking, and π-cation interactions) drive allocrite recognition, binding, and transport by ABCB1 within the membrane. Increasing the lateral membrane packing density reduces allocrite partitioning but enhances dipolar interactions between allocrites and ABCB1. Allocrite flopping (or reorientation of the polar part towards the extracellular aqueous phase) occurs after hydrolysis of one ATP molecule and opening of ABCB1 at the extracellular side. Rebinding of ATP re-closes the transporter at the extracellular side and expels the potentially remaining allocrite into the membrane. The high sensitivity of the steady-state ATP hydrolysis rate to the nature and number of dipolar interactions, as well as to the dielectric constant of the membrane, points to a flopping process, which occurs to a large extent at the membrane-transporter interface. The proposed unidirectional ABCB1 transport cycle, driven by weak dipolar interactions, is consistent with membrane biophysics.
Recent advances in shape selectivity of MFI zeolite and its effect on the catalytic performance
Authors: Zhang Lan , Liu Ning , Dai Chengna , Xu Ruinian , Yu Gangqiang , Chen Biaohua , Wang Ning
Published: December 2022

MFI zeolite characterized by uniform pore size, adjustable acidity, and high-temperature resistance has a broad application prospect in catalytic reactions. However, controlling the product distribution of zeolite as a catalyst is still confronting great challenges and applications. It is considered as an effective way to control the product distribution by developing and improving new zeolites to modulate their shape selective effect. In recent years, researchers have achieved remarkable successes in investigating the shape selective modulation of zeolites on catalytic reaction and molecular diffusion. The microporous channels of MFI zeolite are the main places for the entry and exit of reactants or product molecules. This review provides the research progress of the shape-selective modulation of MFI zeolite channels and its influence on a series of catalytic performances in recent years. The shape-selective modulation of microporous channels of zeolite, encapsulation of micropores to metals, catalysis of mesoporous zeolite, and the distribution of framework Al were all systematically discussed. The development of advanced catalysts still faces great challenges and potential applications. Finally, we discussed the problems to be addressed urgently in the field of zeolite catalysts in the future.
Vibration resistance, vibration testing, vibration monitoring and diagnostics of gyroscopes and other rotary systems
Authors: Petrenko Viktor
Published: December 2022

This article is devoted to the presentation in a historical development of the results achieved, founded by M.A. Pavlovsky scientific directions related to the study of vibration processes in rotary systems
Analytical review of studies in the field of stabilization error measurement methods
Authors: Bezvesilna Olena , Kyrychuk Yurii , Kotlyar Svitlana , Ilchenko Mykola , Halytskyi Vyacheslav
Published: December 2022

In this article, an analytical review of the literature on methods for measuring the stabilization error of stabilization systems (SS) is carried out. The relevance of further research and development in the field of ways to improve the accuracy of measurements of the stabilization error of the SS is substantiated.

The modern method for determining the median error of the SS has distinctive features and has a number of advantages: it requires much less time and the use of manual labor; performed in digital form of information processing in numerical and graphical form; does not require the need to install a movie camera (it was replaced by an optoelectronic module, information from which is fed to the input of a video monitor, to which it is connected via the Pinnacle Movie Box Plus USB matching device, through which the video image is transmitted for recording to a laptop). After performing the research, information according to a specially developed program is automatically processed on a computer, which, based on the results of calculations, gives a more accurate (compared to the new method) value of the median stabilization error along the horizontal and vertical guidance channels.

The model of construction of the line of domestic SS corresponds to the principle of "dependent stabilization" rigid connection of vertical and horizontal channels of the stabilizer with the device of supervision over objects.
Mathematical model of the automatic control system in the problem of guaranteed accuracy
Authors: Zbrutsky Oleksander , Osokin Vladyslav , Min Zheng
Published: December 2022

The formulation and solution of the mathematical problem of the synthesis of an automatic control system (ACS) of guaranteed accuracy under uncertain disturbances using the inverse dynamic system approach is considered. No restrictions are imposed on uncertain perturbations, and the perturbations themselves can be arbitrary. The procedure for forming the structure of the ACS with guaranteed accuracy, which ensures the preservation of the quality (stability and quality of the transient process) of the ACS during compensation of disturbances, and the features of this structure are shown. The proposed method of forming a corrective influence to compensate for the effects of disturbances as a function of the approximation of the ACS state variable to the limit of the permissible value. For the first time, it is shown that such a structure of ACS with guaranteed accuracy corresponds to a new mathematical structure - an algebraic differential equation (for a system with one degree of freedom) or a system of such equations (for a system with several degrees of freedom).
Technical vision system of qadcopter for precision farming
Authors: Bobkov Yuryi , Shevchuk Artem
Published: December 2022

Precision farming is a modern direction of agricultural development, which opens new opportunities to increase the productivity of each land by taking into account its specific features. Its implementation requires an assessment of the spatial heterogeneity of soils and agricultural vegetation. This ensures the timely application of adequate agricultural measures in those places that need it.

In this work, ways of solving the problems of precision farming are analyzed. The expediency of using a quadcopter with a technical vision system to obtain high-resolution images of the studied land plot is shown.

Specialized systems of technical vision for the tasks of precision agriculture are currently not mass-produced. Therefore, a block diagram of the quadcopter's technical vision system was developed, which made it possible to determine the necessary technical characteristics and select the appropriate industrial equipment.

Necessary software and algorithms were developed for the technical vision system. The proposed algorithm is based on the use of high-quality images from the technical vision system of the quadcopter, low-resolution satellite images and the results of agrochemical analyzes. When processing data, individual images taken with a quadcopter camera are combined into a single orthofotoplan. Then NDVI indicators from satellite images and results of agrochemical analyzes are added to it. The identified zones of plant fertility make it possible to build a differentiated fertilizer application map and a map of the agro-operations task plan for precision farming equipment.

To verify the results, studies were conducted on a test site with an area of 57.4 hectares, which was located in the Chaplin district of Kherson region. With the help of the selected equipment and the developed algorithms, images of the area were obtained, an orthofotoplan with plant germination zones was formed, and a map of fertilizer application for precision farming equipment was developed. Field studies fully confirmed the correctness of the calculations and the performance of the proposed algorithms.
Assessment of the effect of cross-section deplaning on the stress-strain state of thin-sheet structural elements with notches
Authors: Bondarenko Oleksander , Gogoleva Diana , Lymanskyi Ihor
Published: December 2022

Currently, the use of light steel thin-walled structures from roll-formed sections in industrial and civil construction is increasing. Studies of the strength properties of these structures will lead to the development of the entire industry, including the aviation industry, which includes the development, manufacture and installation of structures using thin-walled bent profiles.

       The study tested of the influence of deplanation of the cross-section of thin-sheet plates on their use by various methods: FEM-modeling of static thin-sheet samples (plates) with various stress concentrators, imitating structural notches and / or operational defects of structural elements, structural or stimulating stress-strain. fuselage of transport aircraft, analytical calculation and carrying out a full-scale experiment. On the basis of the results obtained and their comparison, conclusions are drawn about the peculiarities of using each of them in the study of the phenomenon of warping on the load of thin-walled elements.
INNOVATIONS OF TESTING ENGLISH FOR SPECIFIC PURPOSES TO STUDENTS OF OTHER MAJORS ONLINE DURING COVID-19 PANDEMIC AT MILA UNIVERSITY CENTRE, ALGERIA
Authors: Bouderbane Abderrahim
Published: December 2022

This article examines a very thorny issue of testing English for Specific Purposes through a barcode correction system to evaluate the usefulness of distance education. The fact is that, this system was used for the first time as a type of assessment which focuses on enriching student’s minimum vocabulary in a variety of English for Specific contexts. Henceforth, the barcode correction system is applied in this study on different types of ESP exercises, and they are corrected as they are taught, explained and consolidated in distance education. Using a quantitative approach in order to determine online teaching efficiency, the barcode system is used to correct student’s papers in a total correction time based on a single time 0.45/paper, calculate the rate of mistakes, and diagnose problems of correct answers, and missing marks. The results indicate that there is a high correlation between mistakes and ESP exercises calculated by the correction of barcode reading. Learning has become much more digitized with subject-specific content and simple exercises with specific communicative objectives.
WHAT WE KNOW AFTER THE PANDEMIC. ONLINE AND FACE-TO-FACE TESTING IN COMPARATIVE PERSPECTIVE
Authors: Stradiotová Eva , Némethová Ildiko , Štefančík Radoslav
Published: December 2022

The article aims to find out the impact of online education on on-site education by analysing the results achieved by the respondents in the tests. We used descriptive statistical methods to analyze the data. The reason was that such methods allow us to better understand the correlation between the results obtained in traditional testing and online testing. The research was conducted in the summer semester of the academic years 2020/2021 and 2021/2022. 2508 students of the University of Economics in Bratislava participated in the research. The respondents were first-year Bachelor's degree students at the University of Economics in Bratislava whose first foreign language was professional English. When analyzing the data we took into account the test results, the number of students who did not take the test, the number of students who had to retake the test, and the number of students who did not take the test. The results confirmed that students who took the test in the home environment performed significantly better than students who took the test in person at the university. The results of on-site education were influenced by the online learning process. As students adapted to the online environment, they changed their study habits, which had a negative impact on learning. This negative impact was also reflected in the results of the on-site testing. The solution to this situation is to better prepare teachers for online learning and to ensure that schools are equipped with the latest technology.
Оntological approach to aggregated evaluation of the work of teams with multiple levels of hierarchy
Authors: Gladun Anatoly , Rogushyna Julia , Lesage Martin
Published: December 2022

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Implementation of the interactive educational and methodical complex of micro-learning using H5P
Authors: Puchkov Oleksandr , Riabtsev Viacheslav , Kulikov Vasyl
Published: December 2022

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Assessment of the impact of metrological and diagnostic support on reliability of digital devices
Authors: Sakovych Lev , Khodych Oleksii , Martusenko Yurii , Bilan Iryna
Published: December 2022

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Analysis of functioning efficiency of information transmission systems with chaotic signals with OFDM-modulation within the conditions of intentional interference
Authors: Vasiuta Konstiantyn , Zbezhkhovska Uliana , Slobodyanuk Valerii
Published: December 2022

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The dependence of the internal electrical resistance of the cable rubber rope on the presence of a cable rupture
Authors: Belmas Ivan , Bilous Olena , Tantsura Ganna , Shvachka Angelina
Published: December 2022

Problems. The introduction of steel reinforced concrete coatings of structures, in our opinion, is preceded by the development of methods for monitoring the state of cable-stayed ropes - creating safe conditions for long-term operation of structures.

The aim of the study. Analytical determination of the dependence of the internal electrical resistance of a cable-stayed rubber cable rope on the presence of a cable rupture.

Methods of implementation. To control all cables, the system must provide alternate monitoring of the electrical resistances of the circuits formed by the cables, compare them with reference values, and issue a signal regarding the condition of the rope. It should be designed on the basis of the following data: the type and design of the cable-stayed rope, its length, the number and layout of the cables in the rope, the ability to access one or both of its ends, the electrical properties of the cables and rubber, the resistance values ​​of the cables for all schemes of their determination.

Research results. Requirements for the automatic control system of the cable-stayed rubber cord rope. The regularity of the dependence of the electrical resistance of the cable-stayed rope on the burst of an arbitrary cable. Possibility of automatic control of the state of the rubber-cable cable-stayed rope.

Conclusions. The results obtained can be considered quite reliable, since the equations obtained on the basis of the fundamental provisions of electrical engineering are obtained analytically in a closed form. Experimental studies have established that the internal electrical resistance of the rope cables depends on its properties and the presence or absence of damage to the cables. The rope includes a number of cables. Any cable can be damaged.
Universal research installation for compression of tubular billets
Authors: Titov Viacheslav , Godziy Sergiy , Myronenko Vitaliy
Published: December 2022

The research was conducted at the Department of Aircraft Technology and Design of the Educational and Research Institute of Mechanical Engineering of the National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”. On the basis of performance of scientific subjects concerning compression of a tubular cavity preparation with formation of an internal cavity the most perspective schemes of such technological processing were investigated and technological and constructive elements of processes and the equipment were defined. Indicators such as quality (compliance of the product with the requirements of use) and its cost, process productivity, technical and economic characteristics and versatility of the equipment were taken into account. To experimentally confirm the chosen direction of implementation, first of all, experimental equipment was designed and the technical process was modeled according to each of the proposed schemes.
Calculation and experimental procedure for determining the modulus of elasticity of porous coatings on a substrate during bending. Part 1. Theoretical foundations
Authors: Dyman Marianna , Moltasov Andrii , Kalyuzhny Serhii
Published: December 2022

The purpose of this work is to develop a design and experimental technique for determining the modulus of elasticity of one of the layers of a two-layer bar of rectangular cross section during bending, provided that the modulus of elasticity of the other layer is known. In this part of the work, using the transition formulas of relatively parallel axes, a mathematical expression has been obtained to determine the bending stiffness of a two-layer rectangular section, which does not include distances from the centers of weight of sections of layers to the pivot center of weight of the entire section, which, in turn, depend on the elastic modules of layers. The presence of such an expression made it possible to form an algebraic equation in which the modulus of elasticity of one of the layers can act as an unknown. As a result, the mathematical connection of the unknown modulus of elasticity with the known modulus of elasticity of the other layer, geometric dimensions of layers and bending stiffness of the entire section was established, which should be determined experimentally.
Finding and analyzing of the energy and force parameters of the flange formation process by orbital stamping by rolling
Authors: Godziy Sergiy , Klisko Andrii , Myronenko Vitaliy
Published: December 2022

A characteristic feature of the details considered in the article is the increased diameter of the flange. At the Department of Aircraft Production Technology of the Scientific and Educational Mechanical and Mechanical Engineering Institute of the Kyiv Polytechnic Institute named after Igor Sikorskyi developed an original technological process for manufacturing products with a developed flange part using the positive effects of the progressive rolling stamping method. The method has energy-strength advantages over traditional methods of manufacturing parts with relatively thin structural elements. The center of application of such technologies is expanding more and more, but the basic technological calculations of process parameters have not yet been introduced widely enough into production practice. The proposed sequence of technological calculations and basic parameters of specialized installations for rolling stamping.
The influence of the size of details on the frontal resistance forces during magnetic abrasive finishing
Authors: Zastavskyi Kostyantyn , Maiboroda Viktor
Published: December 2022

The magnetic abrasive finishing process (MAF) is an effective method of finishing details. It is especially beneficial of processing important parts with complex shape, such as cutting tools, gas turbine blades, medical products, etc. MAF allows to affect the quality of the treated surface, surface hardness, microgeometry of cutting edges (for a cutting tool), removal of residual stresses in the material of the details. The relative newness of the method and, hence, little awareness of the processes and phenomena that occur during MAF limit the wide use of the method in production.
Insufficient awareness of the nature of MAF, especially regarding the forces that arise during the interaction of the processed part and the environment of the magnetic abrasive tool (MAT). Available researches provide only basic information that is not sufficient for a comprehensive study of MAF. This is especially true for the effect of size of the detail on features of the implementation of the process.
Conducting research on the processing of parts of various sizes and determining the forces and phenomena accompanying the MAF.
To perform the aim, a device with a dynamometric sensor that allows to measure the frontal resistance was used. Ferromagnetic and paramagnetic material cylindrical details with different diameters (8, 12 and 16 mm) were used. Polymam-M and Polymam-T (grain size 400/315 μm, 200/100 μm) powders were used. The speed of movement varied in range 1 - 3 m/s, induction of magnetic field: 0.20 - 0.24 T.
It was established that for the specified processing conditions, the influence of the magnitude of the magnetic field induction prevails over the influence of the speed of movement of details. The effect of the size of the parts on the specifics of the MAO is shown, the nature of processing by individual structural formations of the MAO and the difference between them is determined. The question of fluctuations in the magnitude of the resistance force at MAO and the influence of movement speed on them is considered.
The influence of technological parameters on the frontal resistance force during processing of parts of different diameters and materials with different magnetic properties has been determined, and further directions for research have been determined.
Criterion of the limit state of composites materials
Authors: Bobyr Mykola
Published: December 2022

The work proposes and substantiates a type of phenomenal criterion of composite material destruction at the stage of macro crack origination. It considers damageability and two mechanisms of destruction: tearing and slice. It describes that as parameter of damageability it can be taken specific energy of extra stresses or specific energy of diffusion. For proportionate and complex processes of metallic materials loading they result equally in practice. Methodologies of respective energetic parameters search are described. It is set threshold value of stress in the element of construction during the reach of it it is necessary to consider an accumulation of damage. It is described the methodology that describes interconnection between anisotropy factors and components of damage tensor.
Influence of magneto-abrasive machining on the characteristics of the surface layer of flat parts
Authors: Dzhulii Dmytro , Maiboroda Victor , Burikov Oleksii
Published: December 2022

The paper presents the study of the influence of the process of magneto-abrasive machining (MAM) on the characteristics of the surface layers of flat surfaces of parts made of ferromagnetic material U9 by machining with end-type heads based on high-power permanent magnets that form a magneto-abrasive tool of the "brush" type. For estimation of the influence of the process of magneto-abrasive machining on the surface layer, the parameters of surface hardness were analyzed after the machining of test samples with different powders and under different modes. The degree of influence of the MAM on the surface, both in terms of the hardness of the surface layer and the deformation of samples due to compressive residual stresses arising as a result of machining, was studied. The estimation of the state of the surface layer was performed by the change in hardness after machining, the magnitude of the degree of hardening, to some extent, by the parameters of roughness. The control of changes in internal residual stresses formed in the surface layers of samples due to the interaction of powder particles with the surface during machining was carried out according to the degree of their deformation after MAM. It was found that due to MAM, internal compressive stresses of 30–100 MPa arise in the near-surface layer of the material of the samples, while the magnitude of the stresses varied in inverse dependency, that is, with an increase in the working gap, in the vast majority of cases, a decrease in the magnitude of the stresses was observed. It was shown that the depth of the hardened layer under different machining conditions is up to 200 µm or more, and the strengthening coefficient varies from 10 to 40%.
Safety margin determination of the nuclear power plant reactor pressure vessel with taking into account warm pre-stress effect
Authors: Ishchenko Oleksii , Kryshchuk Mykola
Published: December 2022

In case for nuclear power plants long-term service operation over their design life, it is necessary to calculate reactor pressure vessel (RPV) strength and durability acknowledgment (static strength, strength under cyclic and seismic loads, brittle fracture resistance (BFR) include) the as one of the most important NPP structure. Usually, according to the brittle strength assessment, RPV resource is determined, that is, time of its subsequent safe operation. The purpose of this work is assessed BFR RPV at potential emergency accidents (EA) using the Ukrainian warm pre-stress approach. The calculated thermohydrodynamic parameters at EA were used to calculate the stress-strain state of the developed reactor finite element (FE) model. For researching, the most indicative scenarios were selected: where reactor is cooled at a high pressure. In RPV FE model cracks are modeled at the most dangerous places - welds and nozzle. Stress intensity factor (SIF) distribution along crack front and temperature for the most dangerous accidents in terms of BFR are presented in figures. Brittle strength condition is ensured during the nuclear power plants service operation for up to 60 years, which is more than 1.5 times more than the oldest Ukrainian power plant with VVER-1000. For some emergency accidents, warm pre-stress really significantly increased RPV safety margin, but for the most dangerous accidents, the results are the same as without taking into account WPS.
Using the functional approach in the development of hybrid processes in engineering: practical aspects
Authors: Salenko Oleksandr , Klimenko Sergiy , Orel Vadum , Kholodny Volodymyr , Gavrushkevich Natalya
Published: December 2022

The principles of creating hybrid processing processes based on the functional approach are given. The base of this approach, its theoretical aspects are given in the first part of the article. The practical application of the approaches is reflected in specific scientific and technical problems in the problem of high-quality cleaning of the surface from various adhesive coatings, the use of methods for obtaining holes and perforations in workpieces from metals and composite materials, as well as in the problem of contour cutting of plates from superhard sintered materials. It is shown that the use of a functionally oriented approach makes it possible to identify such combinations of force and energy effects that make it possible to process even those materials that are considered difficult to process or not machinable.
Samples of cleaned surfaces, cuts of superhard materials, holes in honeycomb systems of aerospace engineering are presented.
SENSORS BASED ON NANOCELLULOSE FOR BIODEGRADABLE, FLEXIBLE, DISPOSABLE AND WEARABLE ELECTRONICS
Authors: Naidonov Arsenii , Koval V.M.
Published: December 2022

Problems. Rapid technical progress has led to a reduction in the useful life of consumer electronics. The introduction of green, flexible, biodegradable electronic devices will prevent an environmental catastrophe. Recently, the use of organic materials instead of inorganic analogues has become increasingly popular, which makes it possible to move from rigid solid-state sensors for multiple use that require disposal to flexible, disposable sensors that are suitable for human wear on the body or clothing and for spontaneous decomposition in nature after using. One of such promising organic materials is nanocellulose.

The aim of the study. Studying the possibility of nanocellulose application for the manufacture of flexible, wearable, disposable sensors of various types of physical and chemical quantities.

Methodology of implementation. In the article the analysis, classification and comparision of various technologies and features of synthesis, as well as the main characteristics of flexible sensors made on the basis of nanocellulose were fulfilled. Also the main parameters of flexible sensors based on nanocellulose were being compared with corresponding analogs of sensors based on artificial polymers.

Research results. The paper established the physical and technological features of using nanocellulose for the manufacture of sensors of various types of physical and chemical quantities in order to improve their performance. It has been established that nanocellulose can be used both as a substrate and as a sensitive element of a sensor. It has also been shown that nanocellulose is suitable for use in sensors based on both electrical physical phenomena and optical effects.

Conclusions. Nanocellulose is a promising biodegradable material on the basis of which flexible, disposable, wearable sensors can be created. The manufacturing technology of such sensors should contain only low-temperature and dry processing processes. For effective use in certain types of sensors, it is advisable to manufacture nanocellulose with a modified surface or in the form of composites with other nanomaterials. Based on the obtained results, it is possible to improve existing and develop new methods of creating flexible wearable disposable sensors that do not require disposal.