bluuebunny/crossref_metadata_2025 huggingface dataset:
Vital structure of cenopopulations of Potentilla alba L. (Rosaceae) at the Southern Opillia
Authors: Buchko O
Published: July 2021

It is presented results of individuals vitality research and the vital structure of Potentilla alba L. (Rosaceae) cenopopulations at the Opillia. It is investigated 15 cenopopulations according to Yu. A. Zlobin. It is established that the vital status of individuals and the vital structure of P. alba cenopopulations vary depending on the ecological-cenotic conditions. In most cenopopulations, there are individuals of all classes of vitality, but in the correlation between classes there are significant differences. Cenopopulations belong to three vital types, however, prosperous types prevail. The predominance of vitality highest class individuals and high values of the quality index are characteristic for cenopopulations that grow at the mesophytic and steppe meadows and meadow steppes, at podzolic chernozems with a capacity 45-60 cm, formed at the slabs or sloping parts of the slopes – in formations groups of Brizietа mediae and Brachypodietа pinnati. Equilibrium cenopopulations with superiority of vitality higher or middle-class individuals are presented at the meadow steppes formed at relatively steep slopes – in formations groups of Caricetа humilis and Seslerietа heufleranae, as well as associations of Brachypodietum (pinnati) festucosum (valesiacae). Depressive type with minimum values of the quality index and advantage vitality lower class individuals includes the cenopopulation in the formation groups of Elytrigietа intermediae, which are characterized by a high density of dominant species and the plentiful flora composition. The same indicators are typical for the cenopopulation in association groups of Festucetum (valesiacae) stiposum (pennatae), which grows at a steep slope of a hill with shallow black soil and scattered gipsoandardites.
Modern views on phylogeny and systematic position of the genus Muscari (Asparagaceae) Miller
Authors: Boychuk Svitlana , Budzhak Vasyl
Published: July 2021

Systematic and phylogenetic status of Muscari – valuable ornamental and melliferous genus of flowering plants, still unclear despite numerous explorations. Therefore, the aim of the work was to carry out a critical analysis of publications devoted to phylogeny and taxonomy of the genus Muscari and to clarify its taxonomic position. The article provides a brief overview of the main publications dedicate to phylogeny and taxonomy of the genus. The systematic position of the genus Muscari in the early phylogenetic systems, taxonomic systems of the XX century and modern molecular phylogenetic systems is observed. Modern phylogenetic systems developed by Angiosperm Phylogeny Group (APG III, APG IV) and based on DNA sequence analysis. They show that Muscari belongs to the subfamily Scilloideae, family Asparagaceae s.l., order Asparagales, clusters Monocots. Phylogenetic relationships within the genus Muscari is difficult and controversial. In general, there are two main concepts of the genus Muscari division into subgenus. The first was developed by F. Speta in 1999 and is based on molecular data. In it, the genus is considered in a broad sense (s.l.), and divided into 4 subgenera: Muscari, Leopoldia, Muscarimia and Pseudomuscari. The second, more modern concept was developed by R. Govaerts and presented in the «World Checklist of selected plant families». According R. Govaerts, Muscari is divided into 3 separate genera: Muscari s.str. (=Muscarimia, Botryanthus), Leopoldia and Pseudomuscari. Paleobotanical data analysis established that the ancestral forms of modern Muscari originated approximately 3,29 million BC in the Mediterranean and spread to other regions of the world. The closest phylogenetic relatives of Muscari are the genera Scilla and Bellevalia. Chouardia and Nectaroscilla are also highly related. Comprehensive studies of morphological, biogeographical, molecular and other peculiarities of critical taxa are needed to clarification of the systematic position and phylogenetic relationships within the genus Muscari.
CULTURE FORMING ASPECT OF PUBLIC SERVICE ADVERTISING
Authors: Horban Yurii
Published: July 2021

The advertising space acts as a global axiological translator at the present stage, forming a new anthropological type. Acting as a mechanism of persuasion, advertising has become a particular cultural consumption factor, forming a certain way of life and worldview of a person. Public service advertising is the most up-to-date, dynamic and accessible system among information and advertising technologies as to creativity. The purpose of the article is to analyse the peculiar workings of public service advertising discourse and determine the dominant sphere of advertising impact. The research methodology is based on the use of analytical, structural methods, and also objectivity and consistency standards for identifying the procedure, features and typology of public service advertising and functional features of forms of social advertising impact. The study’s scientific novelty consists of public service advertising as a cultural phenomenon, demonstrating the importance of a comprehensive study of cultural, anthropological and philosophical aspects of advertising activities. Conclusions. Thus, focused on the mass environment and reality, advertising is ontologically focused on material mediation and is the most profound intuition of social action. The art of advertising is an ability to convey information, prioritise skills and creativity, and attract the creative realities of a person’s identity and the subject of advertising discourse. It is proved that in advertising, virtual reality becomes a broad integrative mechanism in all its connotations, presentation, systems of human functioning and personal identity in the virtus space of contemporary culture. The culture of information and advertising presentations tries to assimilate, on the one hand, a cultural tradition, and on the other — makes it possible to escape from the brutal, primitive reality of complaint, the need to survive, compete for life. The entire advertising system is ontologically immersed in ethics and aesthetics.
REPERTOIRE TRADITION OF THE UKRAINIAN DRAMA THEATRE: HISTORICAL AND CULTURAL ASPECT
Authors: Matvieieva Kateryna
Published: July 2021

The purpose of the article is to find out the repertoire traditions of Ukrainian theatre from the first professional theatre to the present day. The research methodology applies an interdisciplinary approach. In particular, the principle of historicism is an opportunity to trace the change in the repertoire policy of theatres under the influence of sociopolitical circumstances. Structural-functional and macrodynamic methods to study the theatre at different stages of development are methods of analysis and synthesis used to identify the main artistic phenomena and trends in theatrical activities. Scientific novelty. Based on the analysis of the repertoire plays of five Ukrainian theatres: the Theatre of Coryphaei, Taras Shevchenko Kharkiv Academic Ukrainian Drama Theatre, Taras Shevchenko Dnipro National Academic Ukrainian Music and Drama Theatre, Ivan Franko National Academic Drama Theatre, Maria Zankovetska Theatre — trends in the development of the repertoire policy of the Ukrainian theatre are identified, the influence of traditions and society on the work of leading Ukrainian theatre figures is justified; the boundaries of the concept of “repertoire traditions” are expanded. Conclusions. The article examines the peculiarities of the development of Ukrainian theatre from the creation of the first professional theatre in Ukraine to the present day, highlights the impact of repertoire censorship. Five stages of the formation of the repertoire traditions of Ukrainian drama theatres are described: the period of the birth of Ukrainian drama (I. Kotliarevsky); further repertoire traditions in Tsarist Russia era; the formation of modern Ukrainian theatre (Les Kurbas); the period of World War II and post-war times, when there were attempts to transform the Ukrainian theatre into a Soviet one. It was found out that a unique feature of modern Ukrainian theatre is performances on second stages, one-person production, and the use of advanced technology.
WORK OF NIKOLAI TSIVCHINSKII: CONTRIBUTION OF THE BOYCHUK SCHOOL TO THE ART OF KAZAKH TAPESTRY
Authors: Suraganov Sergali , Suraganova Zubaida
Published: July 2021

The purpose of the research is to introduce the creative achievements of N. Tsivchinskii into scientific use in the context of the formation of the art school of the Ukrainian avant-garde of Mykhailo Boychuk. The study’s objectives are to determine the origins of the formation of the muralist and arts and crafts master N. Tsivchinskii’s work, his contribution to the shape of the history of the Kazakh professional tapestry. His work reflects the penetration and deep insight into the significance of traditional cultural identity, the Boychuk school’s monumentalism inherent. One of the few surviving Boychukists who were scattered to the four corners of the earth by fate, N. Tsivchinskii developed the versatile skills, artistic language, and tradition of the Boychuk school also became one of the brightest figures in the Kazakh decorative and applied arts. The life path and work of N. Tsivchinskii reflect the most critical and tragic chapters of the country development thoroughly, which is no longer on the map. The research methods used are biographical, source-based, and historical. The methodological innovation of the research is the use of the biographical approach along with the historical one in the framework of the “new comparative history” as an effective tool for studying the artistic heritage of Kazakhstan and Ukraine in the Soviet era. The scientific novelty of the study is determined by the introduction of new information about the artist, whose work was only mentioned in the context of the Boychuk school scholars’ activities, a significant part of whose followers were destroyed during the years of the Red Terror. Conclusions. The work of N. Tsivchinskii is considered in the context of the activity of the art school of M. Boychuk, where he became an arts and crafts master. In the 1930s, in Kazakhstan, N. Tsivchinskii continued the traditions of the Boychukists, became the founder of the first carpet cooperative craft society, which became a truly significant phenomenon in the history of the formation of professional decorative and applied art in the republic.
POPULAR CULTURE AS A SOURCE OF IDEAS IN THE URBAN SPACES OF WESTERN UKRAINE DURING THE PANDEMIC
Authors: Babii Nadiia
Published: July 2021

The purpose of the article is to investigate the current issue of changes in activities in the urban spaces of Western Ukraine during lockdown (March–June 2020) and adaptive quarantine (2020–2021) and show the importance of popular culture as a constant that reflects the collective notion of space, updates the imaginary topography, affects the performatisation of the cities and formats of artistic practices. Research methodology. R. Barthes’ methods of semiotic analysis are used, combining structuralism with semiotics, according to which urban spaces are considered as a discourse. The method of site research was applied, which allowed collecting relevant texts concentrated in the spaces of cities where a specific cultural image of the coronavirus time has been recorded. The scientific novelty consists in the determination of the role of popular culture as a vital factor of new sociocultural contents in a crunch period. Conclusions. The article emphasises that the rationalism of anthropological space has been transformed fundamentally during the pandemic and changed the vector of interdependence between the subject, space and place, where the “I” is localised in a new space with the content of the last place, having suffered the destruction of connections due to the absence of “presence”. It is proved that the lack of direct communication with the audience contributed to the spread and use of synthetic art practices that combine postmodern practices with global digitalisation, but this does not mean their novelty. Based on the analysed practices, it is proved that the differences lie in sociocultural characteristics, and popular culture was the first to make alternative adjustments to the changing spaces. Art circles and official bodies oriented on the mass audience have used popular symbols of quarantine realities. Therefore, popular culture in the crunch becomes a source of ideas in the promotion of sociocultural meanings.
ARTIFICIAL INTELLIGENCE AND ISSUE OF AUTHORSHIP AND UNIQUENESS FOR WORKS OF ART (TECHNOLOGICAL RESEARCH OF THE NEXT REMBRANDT)
Authors: Sovhyra Tetiana
Published: July 2021

The purpose of the article is to explore the specifics and uniqueness of visual works created using AI technology. The research methodology is based on applying analytical, theoretical, and conceptual research methods of technological art and the interrelation between digital technologies and art in general. The scientific novelty lies in the fact that the art forms that created using digital technologies were analysed for the first time. In the article, we have considered the phenomenon of technological art due to integrating art and technology. Conclusions. It is revealed that due to the mathematical analysis of the artists’ artworks, certain algorithms of the author’s work can be found, the main components of the work of art can be analysed, and the sign system of art can be transformed into a system of a different order which is numerical one. Thus, the colour, shape, positioning of the objects on the canvas (composition) — everything turns into numerical formulas and combinations. The graphic drawing is transformed into digital, algorithmic. A certain number system is being built, which allows to group works (one artist, era, art movement) into single collection systems, analyse and identify similar algorithmic chains, and create new art products based on these algorithms using the obtained numerical combinations. It means that with algorithmic analysis, it is possible to compare and even combine different types of art within one plane, one form, and one art product.
STAGE IMAGES OF ROCK MUSICIANS AND THEIR INFLUENCE ON THE FORMATION OF MODERN TRENDS IN CLOTHING DESIGN
Authors: Kyselova Kateryna , Shandrenko Olha , Shcherbak Alina
Published: July 2021

The purpose of the article is to reveal the influence of stage images of rock musicians on fashion design trends formation. Research methodology: the authors of the article use methods of source study analysis to determine the level of scientific development of the issue, comparative historical analysis to identify the characteristic features of images of musicians and catwalk models of clothing collections of famous designers, and theoretical generalization to draw conclusions. The scientific novelty of the work is to highlight the influence of stage images of musicians on the formation of modern trends in fashion design. The analysis of genre affiliation reveals stylistic differences of the stage costume of popular musicians of the USA and Europe. Some stylistic characteristics of the artists’ stage clothing could be traced in the collections of famous fashion brands of the 21st century, such as Balenciaga, Philipp Plein, Vetements, Alexander Wang, Alexander McQueen, and others. Conclusions. The research reveals the main stylistic features of the stage costume of hard rock and heavy metal musicians. Stage images of artists were innovative and widely used in fashion design of the 20th and early 21st century. The active influence of musicians on fashion trends began in the 60s and 70s of the twentieth century, which coincided with the development of stage costume design and the significant spread of media technology. Hard rock and heavy metal performers created and popularized such a style direction as “grunge”, which is one of the leading musical trends in 2020–2021. Designers of the 21st century borrowed many details, visual and stylistic features, and even concepts for brands from popular hard and heavy artists of the 1970s–1990s. Stage images of rock musicians have a significant impact on the development of fashion and design.
ICONIC AND SYMBOLIC ASPECT IN TRADEMARKS OF THE LATE 19th AND EARLY 20th CENTURIES
Authors: Kolisnyk Oleksandra , Ohanesian Solomiia
Published: July 2021

The purpose of the study is to identify the possibilities of visual symbolism in the creation of a company image using a logo in the late 19th and early 20th centuries. Research Methodology. The historical, historical-comparative, analytical methods were used to conduct the research; art history methods — formal, figurative-stylistic, semantic analysis — were used to identify the figurative and symbolic language of the company’s logos late 19th – early 20th centuries. Conclusions. Based on the analysis of the works of foreign and national scientists of the 20th century, the symbol and mark are characterised as means of expressing the phenomenon essence, and the existing classifications of symbols are considered. The logos used in the late 19th – early 20th centuries in the world practice and on the Ukraine territory are analysed. The example of the Prudential Financial insurance company (the USA) shows that the use of a symbolic element remained unchanged in the process of its changes during 1860–1996. On the example of the trademarks of Ukrainian enterprises — the Ernst Mehlhose Agricultural Machinery Plant (1874–1923), the F. V. Alsop in Kharkiv enterprise, Luhansk Textile Mill (1904–2001), Kyiv Contract Fair (1797–1930) — the methods of visual identification are considered, the artistic means are determined; the comparative analysis is carried out. It is established that the image of the rock in the structure of the American company logo is a symbol of strength and security and appeals to its main characteristics. It is determined that in the means of visual identification of Ukrainian enterprises of the late 19th – early 20th centuries, there is a tendency to express clearly the company specialisation through realistic images of architectural buildings that belonged to them or produced products, as well as ordinary names with moderate artistic design.
Innovational system of quality control of seeding material in corn seed growing
Authors: Kyrpa M. Ya. , Stasiv O. F. , Lukyanenko T. M.
Published: July 2021

Results of quality investigations of corn hybrids seeds that are formed at the growing phases, postharvest processing and storage are expounded. Quality control system which is based on the acting (standardized) and additional indexes and also methods of their definition is worked out. Seeds viability on the cold germination method, energy and growth force, uniformity and damage are additional indexes, they have high correlation level with sowing qualities and plenteous hybrids properties. Cold germination method includes variable temperatures 8 – 10 and 18 – 20 degrees Celsius that reproduces conditions of “sowing – seedling” corn period in the field. The uniformity is determined by the method of separating seeding material and determination of some fractions content on seeds size 9, 8, 7, 6 mm in it. The damage is defined by looking-over seedlings through a magnifying glass and their separating into 3 groups: seeds which are not damaged, with macro- and micro- damage of germ and endosperm, also seeds with damage in the kind of plucked veil are separately distinguished. The largest level of additional indexes correlation determined by new methods is within r = 0,583 – 0.781 and refers to the field seeds germination, individual plant productivity of corn hybrids. On the base of acting and additional indexes conditioned seeds are offered to be evaluated in accordance with 3 indexes of sowing suitability. If seeds of the first and the second (high and medium) indexes are used marketable seeds of corn hybrids productivity can be increased on 15–18 %. The highest index seeds viability on the method of cold germination must be 85–100 %, quantity of strong plantlets – no less 81 %, uniformity – 91 % and more, content of seeds with macro damage – till 5 % and micro damage – till 29 %. The system of quality control is recommended to be used in the process of seeds preparation and on the phase of their certification. Key words: corn, hybrids, seeds, system of quality, indexes and methods.
Modern systems of agriculture and a new interpretation of crop rotation value of agricultural crops
Authors: Shevchenko M. S. , Decyatnik L. M. , Derevenets-Shevchenko K. A.
Published: July 2021

Based on a broad experimental study of crop rotation productivity in different locations of the Steppe zone, a correlative model for estimating the role of predecessors in the formation of post-crop yields has been developed. The connection between quality of agrotechnologies and change of degree of crop rotation competitiveness of culture is presented. A retrospective analysis of the efficiency of farming and crop rotation systems showed that the constant improvement of varieties and hybrids of crops and technologies for their cultivation created objective agrobiological grounds for reassessment of predecessors in crop rotation. The main motive for this transformation was that in modern agricultural systems, high-potential biotechnological resources allow to obtain higher crop yields on the worst predecessors than on the best in the past. In order to universalize the evaluation of crop rotation efficiency and model their productivity, it is proposed to introduce a crop rotation depression coefficient, which shows the share of yield remaining after individual predecessors compared to its baseline level after black fallow. The most favorable conditions developed after crops with a coefficient above 0,80 – winter wheat, barley, rape, rye, spring barley, oats. At the same time, the development of post-rotational crops was significantly inhibited by sunflower, corn for grain and silage, beets, sorghum and soybeans, their depression coef-ficient was 0,66–0,78. The proposed methodology of system analysis for the assessment of predecessors opens wider opportunities for the formation of adapted crop rotations, optimization the set of crops to market requirements, formation important adjustments to crop rotations in extreme conditions, regulation crop rotation productivity taking into account agrotechnological modernization. Keywords: crop rotation, tillage, fertilizers, crops, grain, predecessors, harvest, minimization.
The influence of sows age on multiple pregnancy and nest weight during weaning
Authors: Нeranina L. A.
Published: July 2021

The results of the study of the indices of the own productivity of sows of Large White breed of different reproductive ages and the influence of this trait on the multiple pregnancy and the weight of the nest when weaning piglets are presented on the basis of using the documentation of the pedigree registration of pigs of the State Enterprise "Experimental farm" Elite "of the Institute of Agriculture of the Steppe NAAN" for the last three years. Based on the results of our research, it was found that the multiple births of sows of group I (18–24 months) is 10.4 heads, the weight of the nest at weaning at the age of 60 days is 181.8 kg, the safety of piglets at weaning is 91 %. Similar indicators in animals of the II and III groups (25–36 and 36 months and older) were 11.1–10.2 heads, 193.8 and 174.2 kg, 96 and 93 %, respectively. The variability of quantitative traits, which were the subject of our research, ranges from 9.3 to 17.5 %, that is, it corresponds to low and medium risk. When determining the influence of the age of mothers on their multiple births and the weight of the nest during weaning of piglets, it was found that the highest correlative relationship – r = 0.44 is observed between the age of the queens 18–24 months and multiple births and weak – r = 0.10 between the age of the uterus 25–36 months and multiple pregnancy. In queens older than 36 months, the correlation between age and productivity is weak and negative, which confirms that with an increase in their age, the reproductive and productive qualities of animals decrease. Improving selection work depending on age is an important and urgent issue in increasing the efficiency of pig breeding, since the volume of pork production depends on it. The age of sows is one of the key factors that affects the reproductive qualities of animals and determines the terms of the economic use of the broodstock, which, in turn, predetermines the need to study this aspect. Key words: pigs, age, sows, productivity, multiple pregnancy, influence, correlation, nest mass.
Pengaruh Disiplin Dan Aktivitas Belajar Terhadap Hasil Belajar Siswa Mahasiswa Pendidikan Guru Madrasah Ibtidaiyah FAI UM Sumatera Barat Tahun Ajaran 2022/2021
Authors: Susanti Dini , Nastuti Reni
Published: July 2021

Penelitian ini adalah penelitian expost facto, penelitian ini dilakukan setelah melihat fenomena-fenomena yang telah terjadi pada mahasiswa PGMI FAI Um Sumatera Barat setelah melakukan observasi. Hasil observasi menemukan bahwa terdapat mahasiswa yang belum disiplin dalam belajar dan masih kurang aktif dalam mengikuti pelajaran. Peneliti ingin mengetahui  apakah terdapat pengaruh disiplin dan aktivitas belajar ini terhadap hasil belajar mahasiswa. Penelitian ini bertujuan untuk mengetahui: (1) Pengaruh disiplin terhadap hasil belajar mahasiswa PGMI, (2) pengaruh aktivitas belajar terhadap hasil belajar mahasiswa PGMI, (3) pengaruh disiplin dan aktivitas belajar secara bersama-sama terhadap hasil belajar mahasiswa PGMI. Instrumen penelitian untuk meneliti kedisiplinan dan aktivitas terhadap hasil belajar adalah teknik angket yang dimana telah disediakan alternatif-alternatif jawaban yang telah disediakan. Kemudian populasi dalam penelitian ini adalah seluruh mahasiswa PGMI tahun ajaran 2020/2021.
Influence of cathode and anode processes on tribocorrosion of aluminium alloy AA2024 in acid rain
Authors: Khoma M. , Vynar V. , Vasyliv Сh. , Dykha A. ,   Khmelnitskyi National University, Kovalchyk Yu.
Published: July 2021

The nature of cathodic processes during the frictional interaction of aluminum alloy with ball corundum in the conditions of reciprocating motion has been studied. Under conditions of anodic polarization under conditions of friction, corrosion processes are activated and their speed during friction increases many times. The potential on the surface of the alloy under acid rain shifts sharply in the negative direction. Changes in the tribopotential and coefficient of friction are characterized by a gradual shift in values ​​at the initial stage of research. The oxide film is formed on the metal surface in neutral and acidic environments. The service life of the film is increased due to electrochemical protection during cathodic polarization at the electrode potential of pure alloy without oxide film. It is proved that polarization changes the life of the film in the initial stages and the loss of material and the coefficient of friction during the entire test period. It is established that the nature of surface fracture also changes as a result of application of the polarization potential during friction. The largest surface damage is observed during anodic polarization.
Durability of working bodies of soil-cultivating machines strengthened by composite electrolytic coatings (CEC)
Authors: Stechyshyn M. , Kornienko A. , Stechyshyna N. , Martynyuk A. , Tsepeniuk M. , Herasymenko V.
Published: July 2021

The task of this work is to find the optimal ratio between the size of the particles of silicon carbide and their volumetric content in the nickel matrix to provide maximum characteristics of strength and wear resistance of the working bodies of soil-processing machines. The article investigates the processes of forming complex electrolytic coatings (CEC) on a nickel basis with particles of the filler of various sizes of silicon carbide (SIC). It has been established that the formation of a sicle size sicle and SiC5 is carried out on a vertical, and all other particles in a horizontal cathode. The volumetric content of SICnano and SiC5 particles in nickel reaches a maximum of about 10%, and SiC100 – 46 %. Cap with particle size 28/20 and 50/40 μm allow you to get the most wear-resistant coatings. In this case, the coating with particles 28/20 μm have higher wear resistance, but coating with particles 50/40 μm are more technological when they are formed. The size of the filler particles has a significant effect on the tribological characteristics of the CEP, namely wear resistance and friction coefficient. It has been established that the highest wear resistance and the smallest friction coefficients are characterized by coatings having as a filler of fractions 28/20 and 50/40 μm. Tribological studies show the promise and efficiency of the CEP to increase the wear resistance of the working bodies of soil-cultivating machines.
Technological factors influence on the antifriction coatings quality
Authors:   Central Ukrainian National Technical University, Shepelenko I.
Published: July 2021

The conditions for the antifriction coatings formation during finishing antifriction non-abrasive treatment (FANT) are analyzed. The requirements for this kind of coatings and the main criteria for assessing their quality are noted. A relationship has been established between the quality of the coating obtained with FANT and the technological factors that determine the conditions for contacting the tool with the treated surface. It is proved that the shape and size of microroughnesses of the treated surface determine the efficiency of the microcutting process and filling the microcavities with the rubbed material. Technological factors influence on the coating quality was investigated during FANT by implementing a multifactor experiment, as a result of which a connection was established between the technological parameters of the process (total friction path, load on the tool), as well as the length of the supporting surface with indicators characterizing the coating quality. Statistical models were obtained for mass transfer of antifriction material, area (continuity) of the coating and surface roughness at natural values of the factors, which made it possible to establish the studied factors influence on the optimization parameters. The analysis of the experimental scattering graphs made it possible to clarify the nature of the factors changes and analyze their mutual influence on the optimization criteria. Taking into account the inversely proportional relationship of the optimization criteria, the achievement of their maximum values at the same time is impossible, therefore, the values are taken according to the final result of the FANT process. The range of the studied factors values is established, the regularities of their change are substantiated from the point of view of the selected optimization criteria. Determination the rational values of the FANT process technological parameters will improve the antifriction coatings quality obtained by a friction-mechanical method.
Theoretical research of the technology of finishing cylinders with antifriction materials
Authors:   Mykolayiv National Agrarian University, Marchenko D. , Matvyeyeva K. ,   Mykolayiv National Agrarian University
Published: July 2021

The article analyzes the research aimed at the use of various materials, additives and additives to oils. It is established that their application is mainly limited to the stages of operation, bench and operational running-in. The use of antifriction materials at the stage of processing the parts of internal combustion engines, limiting the resource, is small, despite the fact that such treatment reduces the running-in time and improves the finish of the friction surfaces. Theoretical calculation of the parameters of the working surface of the engine cylinder liner during their finishing using special antifriction materials showed a 2-fold increase in the bearing surface (from 0.2 to 0.4 of the nominal surface area at the level of the middle line of the profile) and a roughness of 0.27 μm, which is close to the values after the bench run-in. This proves the possibility of using this treatment in order to reduce the time of preparation of CNG and improve the characteristics of the surfaces to be worked. It is established that the finishing of engine cylinder liners with antifriction materials should be carried out at the contact pressure of the working tool (brass bars) on the surface of the sleeve 3 MPa, the speed of the working tool 5.5 m/s, the processing time of the sleeve 20 min. Finishing of sleeves with use of compositions TSK-B100 + SURM-KV, SURM-UO and RVS allows to reduce mechanical losses on friction in TsPG by 5-19% at the beginning of process of running in after processing in comparison with mechanical losses at the end of cold running in without finishing sleeves; to obtain the roughness parameters after finishing the same as after cold running in without additional processing of the sleeves; increase the bearing surface by 2 - 2.5 times (from 0.2 - 0.25 to 0.4 - 0.5 of the nominal surface area at the level of the middle line of the profile), which confirms the calculated data. The final treatment of sleeves with compositions based on antifriction materials TSK-B100 + SURM-KV, SURM-UO and RVS allows to provide values of parameters of a working surface of sleeves (reduction of roughness, increase of a basic surface) approaching their values after cold running in, therefore allows to increase contact loadings. in the connection "sleeve - piston ring" after this treatment and reduce the time of the bench run-in (to the values required for the attachment of other engine connections).
Theoretical justification of the influence of change of dilaton and compression bonds of atoms of materials of machine parts on their tribological effect
Authors:   Central Ukrainian National Technical University, Aulin V. , Lysenko S. ,   Central Ukrainian National Technical University, Hrinkiv A. ,   Dniprovsky State Agrarian-Economic University, Derkach О. ,   Dniprovsky State Agrarian-Economic University, Makarenko D. ,   Dniprovsky State Agrarian-Economic University, Zhylova І. ,   Central Ukrainian National Technical University
Published: July 2021

The course of friction and wear processes in the surface layers of conjugations of machine parts is clarified on the basis of the idea of dilaton and compression bonds of atoms in the materials of parts. Dilaton-compression connections are random in nature, and therefore in this work the theory of destruction of parts by S.M. Zhurkov, thermodynamic and quantum physical approaches. The entropy at the macro-, meso- and microscopic levels and the local regions of the materials of conjugation of the parts subject to friction loading are considered. In the diagram of the state of atomic-molecular bonds the dependence curve Fi(ri) or Ti(ri) is considered and the analysis of transformations of bonds according to the specified diagram is carried out. From the point of view of solid state physics and tribophysics, the manifestation, evolution and consequences of the influence on the characteristics and properties of the friction zone of dilaton and compression bonds of material atoms are considered. Composite materials (composite coatings) are substantiated in more detail. This takes into account the assessment of the concept of material stresses in the friction zone, the ability to relax it, as well as the presence of the SD effect. The fracture process is associated with the modulus of elasticity of the components of the composite material and the bulk content of the filler. An appropriate condition is proposed, which determines the tribological efficiency of composite materials and coatings.
The influence of auger wear on the parameters of the dehydration process of solid waste in the garbage truck
Authors:   Vinnitsa National Technical University, Bereziuk O. , Savulyak V. ,   Vinnitsa National Technical University, Kharzhevskyi V. ,   Khmelnitskyi National University
Published: July 2021

The article is dedicated to the study of the influence of auger wear on the parameters of the dehydration process of municipal solid waste in the garbage truck. An improved mathematical model of the drive operation of dehydration of solid waste in the garbage truck is proposed, which takes into account the wear of the auger and allowed to numerically determine the dynamics of the drive during start-up. It was also established that increasing wear of the auger, the pressure of the working fluid at the inlet of the hydraulic motor rises, and the angular velocity and speed of the auger is significantly reduced. The research of this mathematical model was carried out using the numerical Runge-Kutta-Felberg method of the 4th order with a variable integration step. By means of the method of regression analysis, the power dependencies of the change of nominal values ​​of pressures at the inlet of the hydraulic motor, angular velocity and speed of rotation of the auger from the value of its wear are determined. The last-mentioned dependence defines the detuning from the optimal speed of the auger during its wear and is used to determine the energy consumption of dehydration of solid waste, taking into account the wear of the auger. It is established that the wear of the auger by 1000 mm leads to an increase in the energy consumption of dehydration of solid waste by 11.6%, and, therefore, also leads to an increase of the cost of the process of their dehydration in the garbage truck. It was also established the expediency of further research to determine the appropriate material of the auger and the ways to increase its wear resistance.
Methods for controlling the elastic damping characteristics of pneumatic seat suspensions
Authors: Lyashenko M. V , Shekhovtsov V. V , Potapov P. V , Iskaliyev A. I
Published: July 2021

The pneumatic seat suspension is one of the most important, and in some situations, one of the key components of the vibration protection system for the human operator of the vehicle. At the present stage of scientific and technical activities of most developers, great emphasis is placed on controlled seat suspension systems, as the most promising systems. This article analyzes the methods of controlling the elastic damping characteristics of the air suspension of a vehicle seat. Ten different and fairly well-known methods of changing the shape and parameters of elastic damping characteristics due to electro-pneumatic valves, throttles, motors, additional cavities, auxiliary mechanisms and other actuators were considered, the advantages, application limits and disadvantages of each method were analyzed. Based on the results of the performed analytical procedure, as well as the recommendations known in the scientific and technical literature on improving the vibration-protective properties of suspension systems, the authors proposed and developed a new method for controlling the elastic-damping characteristic, which is implemented in the proposed technical solution for the air suspension of a vehicle seat. The method differs in the thing that it implements a cyclic controlled exchange of the working fluid between the cavities of the pneumatic elastic element and the additional volume of the receiver on the compression and rebound strokes, forming an almost symmetric elastic damping characteristic, and partial recuperation of vibrational energy by a pneumatic drive, presented in the form of a rotary type pneumatic motor. In addition, the method does not require an unregulated hydraulic shock absorber, while still having the advantage of improved vibration-proof properties of the air suspension of a vehicle seat over a wide range of operating influences.
Modeling the parameters of free and driving wheel rolling modes taking into account the asymmetry of the normal reaction diagram
Authors: Romanchenko M. I
Published: July 2021

A method for determining the power and kinematic parameters of a tire and a wheel for free and driving modes of rolling is given. The displacement of the center of normal reactions of the road support surface was taken into account. The amount of displacement is presented as a linear function of the longitudinal force coefficient. The analytical description of the dependence reflects the relationship between the longitudinal force coefficient and the asymmetry coefficient of the diagram of normal reactions of the bearing surface and determines the displacement of the center of normal reactions towards the front edge of the contact area of the tire. The calculated asymmetry of the epure of relative normal reactions can be obtained by choosing the appropriate value of the asymmetry coefficient in the range from 1 to 0. Based on a numerical example, a graphical-analytical display of the force and kinematic parameters of rolling of a wheel with a 15.5-R38 model F-2A tractor tire is presented when using the epure of relative normal reactions described by a parabolic dependence of the fourth degree. The longitudinal force coefficient is determined taking into account the formation of the resulting longitudinal reaction by two components - in the slip section and in the rest section of the tire contact pad elements. It was found that the maximum value of the longitudinal force coefficient for an asymmetric epure of relative normal reactions is observed with a larger value of the wheel slip coefficient compared to a symmetric epure, but remains practically unchanged for both compared diagrams of relative normal reactions. The presented method for determining the power and kinematic parameters, taking into account the asymmetry of the epure of normal reactions of the supporting surface, can find practical application in the selection and substantiation of rational modes of operation of wheel propellers of tractor transport and technological units in various road conditions.
ANALISIS PENDAPATAN REGIONAL KOTA BATAM MELALUI BIDANG KONSTRUKSI & PARIWISATA
Authors: Valensia Angelina , Henokh Tanberius Elbert
Published: July 2021

butuhkan pendapatan untuk mendukung pemerintah dalam memajukan pertumbuhan ekonomi.Tujuan dari penelitian ini adalah untuk menganalisis apa yang membuat perekonomian tumbuh lebih cepat. Setelah kita menganalisa lebih jauh, kita memutuskan untuk memilih “pariwisata “Seperti topik kita karena Batam mendapat rekor peringkat ke-2 setelah Bali, misalkan PDRB akan lebih banyak. Kita sebagai mahasiswa perlu mengetahui dan mempelajari darimana asal pendapatan Kota Batam dan kegunaannya untuk membangun infrastruktur yang sebagian Pendapatan tersebut berasal dari sektor pariwisata, oleh karena itu kami akan menganalisis semua pengukuran pendapatan dan produk domestik bruto kota Batam melalui sektor pariwisata.Selain Pariwisata, konstruksi juga membuat domestik bruto Batam menjadi lebih tinggi yaitu memegang 21,67%. dari 100% yang juga mendukung di bidang pariwisata seperti akomodasi, tempat rekreasi, atau museum.
FABRIKASI PADUAN Fe-Al DARI SAMPAH LOGAM HOME-INDUSTRI-LOKAL
Authors: Sulanjari Sulanjari , Aryanto Didik
Published: July 2021

Paduan Fe-Al merupakan senyawa intermetalik yang menarik untuk dipelajari. Hal tersebut karena dapat diaplikasikan sebagai struktur tahan korosi pada suhu tinggi. Daur ulang skrap Fe dan Al secara langsung untuk menjadi paduan FeAl memiliki keuntungan diantaranya murah dan dapat menggunakan bahan lokal. Pada penelitian ini telah dilakukan fabrikasi paduan Fe-Al dengan menggunakan material daur ulang skrap Fe dan Al. Skrap Fe dan Al dibersihkan dengan standar pembersihan dan dikeringkan dalam vakum oven. Skrap Fe dan Al dicampur dan dimilling dengan komposisi yang berbeda yaitu, 50%Fe50%Al, 75%Fe-25%Al, 87,5%Fe-12,5%Al. Campuran serbuk Fe-Al dikompaksi dalam bentuk pelet dan di sinter pada suhu 500°C selama 1 jam didalam tungku pemanas vakum dengan tekanan vakum 32 mbar. Hasil analisis XRD menunjukkan bahwa puncak difraksi memiliki kesesuaian dengan puncak difraksi unsur murni besi (Fe) dan alumunium (Al). Selain itu, reaksi Fe-Al, Fe-O dan Al-O juga terjadi. Hal itu ditandai dengan munculnya beberapa puncak kecil yang menunjukkan fasa Al13Fe4, Fe3Al, FeAl2, Al2O3 dan Fe2O3. Hasil karakterisasi morfologi menunjukkan bahwa semua sampel paduan Fe-Al masih tersusun oleh unsur Fe (abu-abu terang) dan Al (gelap). Hasil morfologi permukaan sampel paduan Fe-Al menguatkan hasil XRD. Nilai kekerasan berubah dengan perubahan komposisi Fe dan Al. Nilai kekerasan yang diperoleh dalam rentang 52,94 HV – 94,81 HV (pengukuran) dan 56,88 HV – 95,45 HV (perhitungan). Hasil pengukuran dan perhitungan nilai kekerasan menguatkan dari data XRD dan morfologi dari sampel paduan Fe-Al. Paduan Fe-Al yang disintering dengan suhu 500°C belum terbentuk intermetalik Fe-Al.
ANALISA KERUSAKAN PIPA AIR PENGUMPAN BOILER
Authors: Sukandar Sukandar , Heryana Yana
Published: July 2021

Abstrak: Pipa air pengumpan boiler adalah suatu sistem pengumpan air ke boiler. Untuk pelindungan dari serangan korosi pada pipa disuntikkan inhibitor. Kerusakan terjadi  pada pipadi ujung pipa injeksi  inhibitor setelah 7 tahun operasi. Lokasi pipa inhibitor adalah 800 mm setelah swing check valve. Untuk mencari akar penyebab dilakukan analisa kerusakan. Untuk mendukung analisa kerusakan dilakukan pengujian dan pemeriksaan komposisi kimia, fraktografi, metalografi, kekerasan, produk korosi, polarisasi, simulasi aliran dan rasio Na dan PO4 dalam inhibitor. Hasil pemeriksaan komposisi kimia menunjukkan bahwa material pipa adalah sesuai standar. Hasil pemeriksaan fraktografi menunjukkan kerusakan berupa penipisan lokal berbentuk cekungan sepatu kuda. Hasil pemeriksaan metalografi menunjukkan struktur mikro material pipa adalah ferit dan perlit normal. Hasil pemeriksaan produk korosi menunjukkan kandungan oksigen yang sangat tinggi. Hasil pengujian polarisansi dengan inhibitor adalah 19,991 mpy. Hasil simulasi aliran menunjukkan di lokasi pipa injeksi inhibitor adalah zona aliran diam. Hasil pemeriksaan kandungan inhibitor menunjukkan bahwa rasio Na dan PO4 dibawah 2,85:1. Dari hasil pemeriksaan dan pengujian tersebut dapat dikerucutkan bahwa akar penyebab kerusakan pipa air pengumpan boiler adalah serangan korosi akibat konsentrasi oksigen.Kata kunci: Pipa Air Pengumpan Boiler, Baja Karbon, Inhibitor, Aliran Diam, Caustic Gouging, Konsentrasi Oksigen.
Infusão Calórica e Proteica versus Prescrição Dietética na Terapia Nutricional Enteral do Paciente Oncológico
Authors: Silva Mikelly Joanny da , Silva Thalia de Jesus Souza da , Cordeiro Sobrinho Jorge Antonio Pavão , Garcia Erika Ribeiro , Medeiros Maria Tereza Silva de , Câmara Thalita Albuquerque Véras , Sousa Rosângela Maria Lopes de , Santos Alexsandro Ferreira dos
Published: July 2021

Introdução: O suporte nutricional no paciente oncológico não se restringe ao cálculo das necessidades nutricionais e à prescrição dietética, é necessário que o volume prescrito seja realmente infundido. Objetivo: Comparar a infusão calórica e proteica com a prescrição dietética em pacientes oncológicos sob terapia nutricional enteral. Método: Estudo retrospectivo, analítico, conduzido em fichas de acompanhamento nutricional de pacientes que estiveram internados durante sete dias no mínimo, exclusivamente sob terapia nutricional enteral por sonda ou ostomia entre janeiro/2009 e dezembro/2012. As fichas que atenderam aos critérios de seleção foram ordenadas alfabeticamente e, aleatoriamente, selecionadas por intervalo de retirada (k=5). Coletaram-se: idade, sexo, localização tumoral, composição nutricional, volume prescrito e aquele infundido da fórmula enteral utilizada. Com estes dois últimos, calculou-se o indicador “prescrição versus infusão”. Os testes t Student, t pareado e qui-quadrado foram aplicados a um nível de significância máximo de 5%. Resultados: Das 120 fichas analisadas, prevaleceram homens (61,7%) com idade média de 58,3±16,8anos. Em 2010, houve maiores médias de diferença entre volume prescrito e infundido (-392,64ml) e calorias prescritas versus infundidas (-528,23cal). Apenas 37,5% dos pacientes receberam um mínimo de 70% do volume prescrito. Conclusão: Houve um inadequado consumo da dieta infundida em relação à prescrita. Sugere-se que intervenções pela equipe multiprofissional em terapia nutricional minimizem as intercorrências encontradas.