bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation of the healthy nutrition attitude and nutritional literacy level of university students receiving health education
Authors: Iskender Hatice , Yildiz Nesibe , Dokumacioglu Eda
Published: September 2023

BACKGROUND:

A healthy and quality lifestyle is built upon the fundamental pillars of healthy nutrition, quality sleep, physical activity, and stress management.

OBJECTIVE:

This study was conducted to examine the attitudes towards healthy eating and nutrition literacy knowledge levels of university students who have received health education.

METHODS:

The study sample consisted of 295 students who were studying in the field of health sciences. The study includes questions from three separate sections. The first section contains a socio-demographic characteristics form, the second section contains the Healthy Nutrition Attitude Scale (ASHN), and the third section contains the Nutrition Literacy Scala (NLS).

RESULTS:

The mean ASHN score of our study was 71.38±11.7, while the mean NLS score was 19.80±4.2. When our scale scores were categorized, the ASHN score was found to be high, while the NLS score was borderline. A positive significant relationship was found between the scale score averages of ASHN and NLS. As students’ scores on healthy eating attitudes increase, it has been observed that their nutrition literacy scores also increase.

CONCLUSIONS:

We can say that health education is important in developing healthy eating habits among university students.
Bedřich Smetana's Opera "The Sold Bride" in the Logos of Music History
Authors: Afonina Olena
Published: September 2023

The purpose of the article is to study scientific research on the history of Bedřich Smetana's opera “The Bartered Bride”. The methodology of the work includes: source study – for the study of scientific literature and periodicals on the history of B. Smetana's opera “The Bartered Bride”; historical – to consider the opera at different times; generalising – for updating and specifying the basic information about the specified opera. The scientific novelty of the work lies in the fact that the analysis of foreign scientific sources and periodicals on the subject of this opera was conducted for the first time. Conclusions. The relevance of the study of scientific literature and periodicals on the opera by the Czech composer Bedřich Smetana is determined: the importance of Czech culture and musical art in Ukraine (V. Shchepakin, Yu. Zinko, S. Kalytko, A. Kravchuk, I. Pop); clarification of the authorship of the Ukrainian translation of the libretto of B. Smetana's opera “The Bartered Bride” and parallels with M. Lysenko's opera “Natalka Poltavka” (O. Smolnytska); criticism of the choreographic component in the opera from an archival source (T. Churpita). Coverage of the fate of the opera at different times: the popularity and inexhaustible source of Czech folklore (G. Palla, S. Bergmannova); emphasising the patriotism and progressiveness of B. Smetana’s work in comparison with other Czech composers (Z. Nějedla); the influence of F. Liszt and P. Cornelius on the idea of a national comic opera; the flourishing of national ideas and the activities of the C. H. Mahá circle, the reflection of ideas in the libretto of K. Sabina and its relevance to the Czech language (D. Tyrrell); criticism of the premiere performances (Josef Krejčí). Comparison of the comicism of W. A. Mozart's opera “The Marriage of Figaro” and B. Smetana's “The Bartered Bride” (G. Schenker) with an emphasis on heterogeneity, organic joy, simplicity, and charming naivety in the transfmission of content can be considered an open path to future popularity. The critic's remarks about the organic thematic development and orchestral perfection in Smetana's opera were available only to Mozart. Criticism of the contemporary opera performance directed by E. Nellis “The Bartered Bride” (G. Shpalkova).

Key words: musicology, logos of music history, criticism, comic opera, national opera, folk art, Bedřich Smetana's opera “The Bartered Bride”, libretto.
Spiritual Paraphrases in the Works of Ferenc Liszt
Authors: Beinyk Yevheniia
Published: September 2023

The purpose of the study is to study the spiritual paraphrases of Ferenc Liszt in order to identify Christian worldview motifs in the compositions of this type. The research methodology is based on historical, analytical, comparative methods, cultural interdisciplinary approach, hermeneutic approach, which follows from the intonational vision of the nature of music based on the works of B. Asafiev’s followers in Ukraine – D. Androsova, O. Markova, O. Roshchenko, O. Sokol, and other leading scholars. Scientific novelty. For the first time in Ukraine, Liszt’s compositional landmarks are highlighted with an emphasis on a religiously and morally significant number borrowed from the material of the model on which the paraphrase is written. A classification of spiritual paraphrases by the type of thematic borrowings – from operatic representations of spiritual chants or through references to liturgical music as such – is introduced for the first time. Сonclusions. Among the vast heritage of the composer’s spiritual music, a special niche is occupied by spiritual piano paraphrases. Conventionally, the spiritual paraphrases created by the composer can be divided into paraphrases on opera themes based on models of spiritual music and paraphrases on directly spiritual works. Paraphrases on church music as such are unique in that here music intended directly for service in a church moves into the instrumental secular sphere. The metaphor of the spiritual-secular is derived from this, which gives special significance to Ferenc Liszt’s work, especially in his later years. However, the paraphrases based on Verdi’s workswhich model church sounds, are also significant, and their introduction into the piano composition is despite the emphasis on the popular non-church images.

Key words: spiritual music, paraphrase, musical genre, style in music, modelling of ecclesiasticism in secular art.
Directing Activity: Paradigm of Integrity of Creative System and Praxeological Processes of Stage Mastery
Authors: Donchenko Natalia
Published: September 2023

The purpose of the article is to consider and provide an appropriate description of the sphere of directing as a paradigm of an integral creative system, to highlight its artistic and aesthetic feasibility and to determine its role in the praxeological establishing processes of stage mastery. The research methodology is to use the functional method to consider the synthesis of cognitive meanings, pragmatic characteristics, classification guidelines of the profession. The systematic method is applied to interpret and holistic consider the conceptual and structural activity of the director as a paradigm of the stage art. The art history method helped highlight the directing activity as a phenomenon of critical interpretation of an artistic work in the creative process over the theatrical form. The axiomatic method is used to summarise the established ideas of the creative activity of a master director, its level of expediency and degree of artistic value. The modelling method helped determine the standard, the model of the optimal system for constructing a quality directing activity in the phased creation of a stage production. The analytical method is applied to analyse the essence of the relevant spectrum of content, artistic achievements and effectiveness of the creative skills of a theatre production specialist. The novelty of the research lies in a comprehensive analysis of the reproductive capacity of directors, the quality of professional knowledge and abilities, and the degree of effectiveness of qualification requirements. Conclusions. The question of studying the presence of two full-fledged artistic principles in directing in Ukrainian theatre: directing the so-called root and directing the result remains open, because the opinion of what is characteristic and valuable in the directorial activity of Ukrainian theatres has not been corrected. Everything that contains the paradigm of the main trends in the stage creativity of directors has not been sufficiently analysed. Although the rich and inexhaustible treasure trove of practical experience of Ukrainian directors forms the fundamental basis for an analytical study that will create an appropriate scientific and theoretical opinion on the comprehensive definition of the content of all criteria for identifying directorial activity, the format of special abilities, the degree of giftedness and the range of talent of a director-professional of stage art is to be studied.

Key words: directing activity, knowledge and creative abilities, director, actor, theatre.
The Impact of Public Agricultural Spending on Foreign Direct Investment Inflows in Agriculture in South Africa: An ARDL Analysis
Authors: Mbiakop William Djamfa , Khobai Hlalefang , Fani Djomo Choumbou Raoul
Published: September 2023

Since the transformation of South African agriculture post-apartheid, public agricultural spending and foreign direct investment in agriculture were regarded as predominantly essential for the development of agriculture sector. However, many authors still argue whether public agriculture spending should be complemented by foreign direct investment inflows in agriculture or vice versa.  Thus, the key focus of this paper is to investigate the impact of public agricultural spending on foreign direct investment inflows in agriculture in South Africa over the period 1991-2019. The Autoregressive distributed lag(ARDL) Bounds test and Granger causality were used to investigate both short run and long-run impact of public  agricultural spending on foreign direct investment inflows in agriculture. The results of the long run model show that agriculture production has a positive and significant impact on foreign direct investment. However, public spending in agriculture has a negative and significant influence on the foreign direct investment inflows in agriculture. In addition, Granger causality results show causality flowing from public agriculture spending, net export and inflation  to foreign direct investment inflows in agriculture. Hence, it is recommended that  policymakers should take practical steps towards total eradication of misallocation and squandering of the available funds and redirected toward bridging infrastructural deficits, land restitution to promote foreign direct investment inflows the development of agriculture.
Stepwise approach in the management of oral lichen planus
Authors:   Department of Oral Pathology, Tokyo Medical and Dental University, Japan, Nguyen Phan The Huy ,   Department of Oral Pathology, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam, Tran Ngoc Lien ,   Department of Oral Pathology, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
Published: September 2023

Lichen planus is a chronic inflammatory disease in the skin, hair, nails, and mucous membranes. Like in other sites, oral lichen planus (OLP) includes asymptomatic and flare-up or symptomatic periods. The symptomatic period is characterized by erosive, ulcerative, or painful symptoms. In addition, some lesions may have potentially malignant transformation. Despite many molecular-based studies, the OLP etiology is still unclear. Hence, there is no gold-standard therapy for OLP so far. The management of symptomatic lesions is based on each individual’s clinical features, and treatment outcomes are often unpredictable. That explains why most dentists are not confident in dealing with this disease. Nevertheless, there is a consensus among the majority of authors that the pathogenesis of OLP, as an immune-mediated disease, is related to T-lymphocyte immunological dysfunction. Medical treatment, using immunosuppressant therapies or immunomodulators, aims (1) to alleviate painful symptoms, (2) to heal the ulcerative and atrophic lesions, (3) to reduce the risk of malignant transformation, and (4) to prolong the symptom‑free intervals. This review article aims to synthesize current literature evidence and integrate the authors’ experience in suggesting a stepwise approach to manage OLP patients.
Effect of prf on pain, swelling, trismus after surgical removal of impacted lower third molars
Authors:   Department of Oral Minor Surgery, National Hospital of Odonto-Stomatology at Ho Chi Minh City, Vietnam, Phan Thinh Canh , Vu Hoang Minh ,   Faculty of Odonto-Stomatology, Pham Ngoc Thach Medical University, Vietnam, Nguyen Khoa Van ,   National Hospital of Odonto-Stomatology at Ho Chi Minh City, Vietnam, Nguyen Ly Thi Bich ,   Department of Oral Minor Surgery, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
Published: September 2023

Objectives: The aim of this study is to evaluate the effects of PRF on reducing pain, swelling and trismus after surgical removal of impacted lower third molars. Materials and methods: A randomized controlled clinical trial with parallel design was performed on 47 healthy patients, with 55 mandibular wisdom teeth on both sides with similar difficulty index, having needs and indications for extraction. All patients had the same standardized extraction protocol at Department of Minor Oral Surgery in National Hospital of Odonto – Stomatology at HCM City. In the study group, patients’ blood was collected, centrifugated to produce PRF, which was then placed in the wisdom tooth sockets after surgery. In the control group, the tooth sockets were curetted and sutured as in normal protocol. Pain level was assessed according to VAS scale at 2, 4 and 6-hour time point after patients’ lower lips stopped feeling numb, and on the 1st, 3rd and 7th postoperative day; swelling was evaluated based on the measurements between facial landmarks; trismus was assessed based on the distance between incisal edges of upper central incisor and lower incisor during maximum mouth opening on the 3rd and 7th postoperative days. Data obtained were statistically analyzed. Results: The pain level of patients in the PRF group was significantly lower than that of the control group (p<0.05) on the 1st and 3rd postoperative days. The swelling level did not differ between the two groups at all time. There was less trismus in the PRF group compared to the control group at all times, but the difference was not statistically significant (p>0.05). Conclusion: This study suggests that using PRF can help reduce pain level and trismus after surgical extraction of impacted lower third molars and could be used routinely after third molar sugery extraction.
Prevalence of medication adherence in patients with type 2 diabetes mellitus at outpatient clinics, Thong Nhat hospital, Ho Chi Minh City
Authors:   School of Medicine, VNU-HCM, Vietnam, Lê Trương Thuỳ Nguyên ,   Faculty of Pharmacy, Thong Nhat Hospital, Ho Chi Minh City, Vietnam, Lê Tường Vy ,   School of Medicine, VNU-HCM, Vietnam, Bùi Thị Hương Quỳnh ,   Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, Vietnam; Faculty of Pharmacy, Thong Nhat Hospital, Ho Chi Minh City, Vietnam, Phạm Thị Thu Hiền ,   Faculty of Pharmacy, Thong Nhat Hospital, Ho Chi Minh City, Vietnam
Published: September 2023

Background: Medication adherence plays important role in diabetes mellitus treatment. Objective: To investigate using of antihyperglycemic drugs, prevalence of medication adherence and risk factors associated with medication adherence. Method: A cross-sectional study was conducted in 300 patients with type 2 diabetes at Thong Nhat hospital from 01/2021 to 06/2021. Patients were interviewed with a prepared questionnaire. Medication adherence was defined based on scores of Morisky questions: good adherence: MMAS = 8, moderate adherence: 6 ≤ MMAS < 8 and poor adherence: MMAS < 6. Results: 47,7% patients were administrated with dual therapy; metformin and gliclazid were most commonly used (93,9% and 40,3%, respectively). The prevalence of medication adherence was 73,7%; proportion of good and moderate adherence were 19,7% and 54,0%, respectively. The odds of medication adherence in smoking group was 89% lower than non-smoking group (OR = 0,11; 95% CI: 0,03 – 0,38; p < 0,001); this figure in insulin group was 61% lower than group not using insulin (OR = 0,39; 95% CI: 0,2 – 0,79; p = 0,008) and the odds of adherence in male patients was 2,3 times higher than female patients (OR = 2,3; 95% CI: 1,19 – 4,44, p= 0,014). Conclusions: Medication adherence prevalence of type 2 diabetes patients at Thong Nhat Hospital is moderate. Giving up smoking, consulting using drugs and importance of medication adherence may improve medication adherence for diabetes patients.
Merchantry as a social institution of Kazakh society: Russian and Kazakhstani historiography
Authors:   L.N. Gumilyov Eurasian National University, Yermenbayeva G. , Mukatayeva L. ,   M.S. Narikbayev KAZGUU University, Mazhitova Zh. ,   Astana Medical University, Khassenova Zh. ,   L.N. Gumilyov Eurasian National University
Published: September 2023

This article provides a historiographical review of scientific works devoted to the history of the merchants of Kazakhstan, their role in the socio-economic and cultural development of the country in the second half of the XIX – early XX century. Scientific interest in the figure of a merchant-entrepreneur, a bay, the creator of a trading network, industrial enterprises, a philanthropist and a benefactor is justified, as it makes it possible to more clearly represent his social function, and through this to outline the corresponding qualities of merchants. Up until the late 1980s. in the Russian historical science, merchants were given obviously insufficient attention, the history of merchants was ignored as an object and subject of research. Merchants in Kazakhstan in different historical periods played an important role in the economy and culture of the region. Studying the history of merchants can reveal many aspects of the life of this class group, as well as its interaction with other social groups. Historiographical analysis of the history of the merchants of Kazakhstan in the second half of the XIX – early XX centuries. contributes to the objective reflection of studies published in various periods: pre-revolutionary (pre-Soviet), Soviet, post-Soviet (modern) periods of the history of Kazakhstan. The historiographical analysis is relevant from the point of view of modern discussions about the contribution of merchants to the socio-economic development of cities, charity, culture of Kazakhstan. The revival of entrepreneurship, modern socio-economic processes encourage scientists to study this problem in depth.
Activities of the national intelligentsia to organize assistance to the Kazakhs mobilized for rear work during the First World War
Authors:   Siberian Branch of the D.S. Likhachev Russian Research Institute of Cultural and Natural Heritage, Sarmanova S. , Kozybayeva M. ,   Branch of the Institute of History and Ethnology named after Ch.Ch. Valikhanov, Maslov Kh. ,   L.N. Gumilyov Eurasian National University
Published: September 2023

The article examines the role of figures of the Alash movement and the Kazakh intelligentsia in organizing assistance to Kazakhs mobilized for rear work during the First World War. With the beginning of the requisition, the activities of public committees for the organization of assistance to mobilized Kazakhs intensified. The article examines the activities and his direct participation of Alikhan Bukeikhan and his associates in the creation of a foreign department under the Committee of the Union on the Western Front, which monitored the living and working conditions of the rear guards, dealt with their nutrition and treatment. The authors come to the conclusion that numerous appeals of «Alash» figures demanding the immediate return of Kazakh workers mobilized for rear duty and the cessation of further mobilization lead to the fact that the Provisional Government was forced to issue a special decree suspending the mobilization of Kazakhs for rear work. In general, the analysis of archival materials showed that the involvement of educated Kazakh youth in the work of the Foreign Department to assist compatriots mobilized for rear work allowed them to go through a serious political school, and they fully managed to prove themselves during the subsequent revolutions.
Patriotic mobilization of women workers in West Kazakhstan through Soviet propaganda during World War II
Authors:   Abai Kazakh National Pedagogical University, Tapalova A.
Published: September 2023

This research paper examines the impact of Soviet propaganda on women workers in the West Kazakhstan region during World War II. Despite facing difficult working conditions, women workers in this region were mobilized through propaganda campaigns that aimed to promote patriotism and encourage them to take on traditionally male-dominated roles in home front. The study addresses two key questions: How did Soviet propaganda mobilize women workers in this region, and what impact did it have on their daily lives? The research methodology involves a content analysis of periodical press and personal sources such as memoirs and letters. Additionally, the study utilizes primary sources to understand the function of the Communist Party's agitation and propaganda apparatus. The findings highlight the power of propaganda in shaping the thinking and behavior of a population during a critical period in history, contributing to a better understanding of the influence of agitation and propaganda on women's work ethic and providing a valuable contribution to the historiography of women's employment during the war. This paper contributes to our understanding of the impact of propaganda on women workers during World War II in the Soviet Union and provides insights into the daily lives of women workers in a specific region.
"Turkish colleagues worked perfectly!": Ankara's secret contribution to the British suppression of German-Polish diplomatic contacts in 1940-1941
Authors:   Tel Aviv University, Falkov Ya.
Published: September 2023

The historiography of the Second World War traditionally points to the position of neutrality, which was emphatically adhered to by official Ankara until the beginning of 1945. It is generally believed that it was she who allowed the Turkish republic to avoid being drawn into a global conflict, as well as the seizure of the country's territory by the troops of one of the conflicting parties. The British and German archival documents discovered by the author of the article indicate that the Turks were far from neutral in the intelligence sphere. Their close secret cooperation with the British allowed them to prevent Berlin's attempt to end the war in Europe on favorable terms already in 1941. Thus, the Turkish state had a much more significant influence on the course of the Second World War than previously assumed.
КРИТЕРІЙ ЯКОСТІ ПЕРЕХІДНОГО ПРОЦЕСУ І ПОКАЗНИКИ ТОЧНОСТІ СИСТЕМИ СТАБІЛІЗАЦІЇ РАКЕТИ
Authors: Авдеев Вольт Васильевич
Published: September 2023

Equations given connection between criteria coefficients, control law, coordinates vectors of errors and the work of an inertial actuating link during transient process of a constant disturbing acceleration compensation for the case of a plain rotation movement are obtained. Unlike traditional form of a control law that in article takes in account all coordinates of the state vector according to chosen model what has a positive influence on stability factor and stabilization accuracy. Obtained results give the possibility to determine control law coefficients on the assumption of taken priority system’s indexes.
МЕТОДИ Й МОДЕЛІ ДОСЛІДЖЕННЯ ВІРТУАЛЬНИХ ВИРОБНИЦТВ, ОРІЄНТОВАНИХ НА ВИПУСК ВИСОКОТЕХНОЛОГІЧНОЇ ПРОДУКЦІЇ
Authors: Федорович Олег Евгеньевич , Западня Ксения Олеговна , Гайденко Олег Александрович
Published: September 2023

The problem to create the virtual manufacturing system (VMS) for the manufacture of high-tech products (aeronautics, automotive, instrumentation, etc.) is stated and solved. In order to achieve the goal three phases that are logically linked to each other are outlined, such as the selection of VMS composition, preparing of the production of high-tech products to fulfill the orders portfolio, the arrangement of "supply - production - sales" logistics chain. The models and methods based on lexicographical ordering of the alternatives, linear integer programming with Boolean variables and agent-based simulations are developed. The proposed approach makes it possible to evaluate the costs, time and risks associated with VMS organization to fulfill the orders portfolio.
«НЕПЕРЕДБАЧЕНІ УСКЛАДНЕННЯ» В АЛГОРИТМІ ОБРОБКИ ТРИГРАННИХ КУТІВ АБО ПРО ВЛАСТИВОСТІ ПЛОСКИХ КУТІВ ТРИГРАННОГО КУТА
Authors: Лякун Станислав Федорович , Юркевич Владимир Евгеньевич
Published: September 2023

The plane angle (PA) properties in the trihedral angle (TA) are described. But “unexpected troubles” of these properties arise at the development of the TA processing technology. Because if you do not take into account the properties of the plane angles when testing the algorithms for calculation and processing of the PA, the improper conclusion will be made that these algorithms are useless! In particular, the algorithm is applicable at the manufacturing of the deep-space communication equipment, waveguides, bodies of the microwave integrated modules, radar equipment as well as in the machine computer numerical control unit as cycle named “trihedral angle”. It means that the trihedral angle processing technology, which has not been born as yet, will be “dead”. In the article four properties of the plane angles are described in terms of the trihedral angle fabricability. Three of them are known in the mathematics. The forth property is proven for the first time. The required calculations to check the creation of the control program and algorithm for processing of the TA are given with a help of Microsoft Excel program. The authors can send the algorithm realized in Microsoft Excel with the user manual by the e-mail.
АВІАЦІЙНЕ ТРАНСПОРТУВАННЯ РІДИННИХ РАКЕТ-НОСІЇВ
Authors: Фролов Виктор Петрович , Клименко Дмитрий Васильевич
Published: September 2023

This paper concerns the problem of liquid propellant launch vehicles delivery to the launch center. The variants of launch vehicles transportation using rail, road and air transport were considered. The key problems of transportation using the aircrafts, such as overloads applied to the launch vehicle attake off and landing, variation of temperature inside the aircraft cargo compartment, difference in pressure inside the launch vehicle propellant tank sand aircraft cargo compartment, were studied. As a result the proposals for avoiding such problems at transportation using aircraft were stated. Also, the transportation using aircraft was selected for delivery of the Cyclone-4 orbital launch vehicle and the block of Taurus-II launch vehicle.
ФОРМУВАННЯ ЕФЕКТИВНОСТІ ЕТАПУ ТЕХНОЛОГІЧНОЇ ПІДГОТОВКИ ВИРОБНИЦТВА АГРЕГАТІВ ЦИВІЛЬНИХ ЛІТАКІВ
Authors: Коцюба Александр Анатольевич
Published: September 2023

Based on analysis of numerous sources, a set of interrelated components of technological preparation of the civil aircraft production is established, among which manufacturability of aggregates’ structure, most fully reflecting quality of product, is highlighted. Decomposition of manufacturability complex, consisting of interconnected components of the design, production and operational manufacturability, is carried out. New variant of the technique of evaluation of total maintainability of aircraft assembly or aggregate, based on the expert evaluations of contributions of mutual influence of its components, presenting an open system, capable to further expansion or folding depending on conditions and scales of production, is offered. Hypothetical demonstration example of the formation of efficiency of technological preparation stage of the civil aircraft aggregate production is considered.
ПРО МОЖЛИВІСТЬ УСУНЕННЯ КРАПЕЛЬНОЇ ФАЗИ ВАКУУМНО-ДУГОВОГО РОЗРЯДУ ВВЕДЕННЯМ ЕНЕРГІЇ У ЗОНУ ЇЇ ТРАНСПОРТУВАННЯ
Authors: Сысоев Юрий Александрович
Published: September 2023

Briefly reviewed the known methods of reducing the amount of microdroplets in a vacuum arc coatings. It has been shown that they do not allow to completely eliminate the microdroplets of the plasma stream. The possibility of removing the drip phase vacuum arc discharge by evaporation it when entering the microwave energy in its transportation zone was considered. Vacuum arc apparatus for implementing this method was proposed. The estimation of microwave energy required to evaporate droplets of titanium at a current of arc 100 A was done. Unaccounted the factors that can lead to lower of obtained value were considered.
ПОРІВНЯЛЬНІ МЕХАНІЧНІ ТА МЕТАЛОГРАФІЧНІ ДОСЛІДЖЕННЯ ЗВАРНИХ З’ЄДНАНЬ З ВИСОКОМІЦНИХ ТИТАНОВИХ СПЛАВІВ ОТРИМАНИХ МЕТОДАМИ АРГОНОДУГОВОГО ТА ЕЛЕКТРОННО-ПРОМЕНЕВОГО ЗВАРЮВАННЯ
Authors: Федосов Олексій Вікторович , Карпович Олена Володимирівна
Published: September 2023

The paper presents the results of mechanical and metallographic studies of the welded joints structure of the high-strength titanium alloys 20-30 mm width. In the paper is shown that with TIG and EBW welding of high-strength titanium alloys, there is a tendency to form defects in the weld metal. The results of metal chemical composition are shown in the paper as well thermal influence, micro- and macrostructure of welded joints and the measurement of hardness are presented. Recommendations are developed, which in a great degree exclude the appearance of defects in welded joints and increase their performance characteristics.
ДОСЛІДЖЕННЯ ВПЛИВУ ВОЛОГОСТІ ПОВІТРЯ НА ПАРАМЕТРИ ГАЗОТУРБІННОГО ДВИГУНА
Authors: Бойко Людмила Георгиевна , Даценко Вадим Анатольевич
Published: September 2023

The mathematical model of a turbo-shaft engine with a two-stage gas generator was obtained. This model is based on the multi-stage compressor blade – to - blade description, which makes it possible to evaluate the effect of air humidity on its performances. The characteristics of the axial multistage compressor in the presence of a moist component in the air at the engine entrance and in its absence were compared. The gas turbine engine main parameters were shown in the presence of moisture content. The quantitative estimation was made as well.
ВИКОРИСТАННЯ КОНДЕНСАТУ ПРИ КОМБІНОВАНОМУ ОХОЛОДЖЕННІ ПОВІТРЯ НА ВХОДІ ГАЗОТУРБІННОЇ УСТАНОВКИ
Authors: Радченко Андрей Николаевич , Портной Богдан Сергеевич , Прядко Александр Игоревич , Кантор Сергей Анатольевич , Прядко Александр Игоревич , Кантор Сергей Анатольевич
Published: September 2023

The heat-humidity processes in the two-stage air cooler of combined type with water stage of precooling air to the temperature above 15 °C and refrigerant stage of further deep cooling air to the temperature about 10 °C by utilizing the exhaust gas waste heat in the absorption lithium-bromide chiller as the high temperature cooling stage and refrigerant ejector chiller as the low temperature cooling stage of the combined thermotransformer for gas turbine intake air cooling has been analyzed for daily changing ambient air temperatures and corresponding heat loads on the stages as consequence. The processes of producing the condensate as a subproduct of gas turbine unit intake air two-stage cooling were simulated for two variants of design heat loads upon air cooler stages: for approximately equal heat loads upon the air cooler stages and for more than twice decreased heat load upon the high temperature cooling stage as compared with a heat load upon the low temperature cooling stage. The data about hourly amount of condensate extracted in each air cooler stage summed up over days and month and its temperature were calculated. The results of calculation have shown that the temperature of condensate received in the refrigerant low temperature cooling stage is about 11 °C and the temperatures of condensate received in the high temperature cooling stage with a chilled water temperature of 7 °C from absorption lithium-bromide chiller is about 15 °C that is the first one is lower by about 4 °C. It was also shown that the temperature of condensate from both stages of a combined twostage air cooler remained nearly unchangeable during July. A conclusion about separate rejecting condensate from high and low temperature cooling stages of air cooler was made. The reserves of refrigeration capacity of absorption lithium-bromide chiller and refrigerant ejector chiller due to daily changeable heat loads were analyzed from the point of their use for cooling of condensate to the temperature of about 7 °C and its application as a coolant for high temperature cooling stage of gas turbine intake air cooler.
МОДЕЛЮВАННЯ ХАРАКТЕРИСТИК БАГАТОСТУПЕНЕВОГО ВІСЬОВОГО КОМПРЕСОРА АВІАЦІЙНОГО ДВИГУНА З УРАХУВАННЯМ ЕРОЗІЙНОГО ЗНОСУ ЛОПАТОК
Authors: Барышева Елена Серафимовна , Дёмин Александр Евгеньевич , Зеленский Роман Леонидович
Published: September 2023

In developing of methods for diagnostic based on the parameters of the working process of the flow-through part of aviation gas turbine engines, the development of the working process thermogasdynamic model for the engine is the main task. Math modeling of various types of defects of engine elements is carried out by introducing into the model the changed characteristics of these units, which makes it possible to determine the change of parameters which are recorded in operation. With the help of such a model it is possible to assess the technical state de the deviations of the measured parameters. The ability to determination and using of the multistage axial compressor characteristics with taking into account the erosive wear of its elements during operation significantly enhances the capabilities of such models, since the erosion wear of the flowing part, the blades of the impellers and the guide vanes of the multistage compressor is one of the most frequent cause of early removal of the gas turbine engine from the aircraft. The mathematical model of the multistage axial compressor is created and the results of its verification according to experimental data are given. The correspondence of the obtained compressor mathematical model to the real object is shown in a wide range of regimes in terms of rotation frequency and flow rate. In accordance with the level of the compressor model, the authors proposed a method for taking into account the abrasive wear of the blades and its implementation is carried out. The proposed approach is open for making changes as data is accumulated during operation. Influence on the compressor characteristic of various factors arising in the course of operation, such as changing the chord and geometric angles of the profile, is considered and the results of are shown. Calculations of compressor characteristics with taking into account erosion wear in a wide range of operating conditions are carried out and the obtained results are presented. The obtained characteristics of the compressor allow to form a diagnostic mathematical model of the engine. With the help of this model, it is possible to select the most informative parameters recorded for use in diagnosing the development of such a defect as erosion wear.
ДВОМАСОВА МОДЕЛЬ СИСТЕМИ СИЛОВОЇ ГІРОСКОПІЧОЇ СТАБІЛІЗАЦІЇ
Authors: Газарханов Энвер Тапдыг , Каримли Тогрул Иса , Нейматов Васиф Айдын
Published: September 2023

The mechanical system of the gyro stabilization device on one axle, consisting of a stabilizing engine and a hinged frame, has been investigated using a two model that adopts as the first mass a stabilizing engine, аnd as an inferred mass, the gyroscope frame of a single axis of the coordinate system. The objective is to draw up a transmission function for the mechanical system of the gyroscope stabilizer in order to obtain transitional processes that meet the conditions of technical period based on known Mathematical models of mechanical conductivity often encountered in the study of mechanical electric power systems. It was proposed to apply the standardized equation of the third order with constant coefficients and to obtain the equations of the moment of inertia, in which the conditions of technical optimum were maintained in any case. It was also suggested that a formula be applied to discriminant a cubic equation in order to obtain calculation formulas to calculate the moments of inertia that provide the conditions of technical optimum. In this case, a definition of the dimensionless parameter, expressed by the multiplicity of the stiffness coefficient value, is given, relative to the value at which the moments of inertia of the mechanical system Gyrostabilizer have zero values, and the defining physical. The meaning of the resulting equations for the mechanical system. In the MATLAB software environment, models have been prepared to derive the transition processes of the two system of Gyrostabilizer, the moments of inertia of the hinged frame and the rotor of the stabilizing engine from the dimensionless parameter, with different values Friction coefficient and transitional processes at different values of the coefficient of multiplicity. The graphs and transition curves that have been obtained demonstrate that the equality of moment of inertia is only possible if the technical optimum is achieved, the oscillation ability transition rate decreases with the increase. A multiplicity coefficient, and the effect of this setting is relatively low during the transition process. Thus, the results obtained from the simulation of computer models confirmed the validity of the studies carried out.
СИСТЕМА НАДДУВАННЯ БАКА ПАРАМИ КИСНЮ З ОЧИЩЕННЯМ ВІД ПРОДУКТІВ ЗГОРЯННЯ
Authors: Мітіков Юрій Олексійович , Дубровський Іван Дмитрович
Published: September 2023

Considered with respect to modern launch vehicles, the risks of using the once widespread systems of pressurization of tanks with liquid oxygen by its hot vapors. Such systems were successfully used at the Fau-2, at the second stage of the LV 63S1, the first stage of the Saturn-V LV. They do not require complicating the launch complex by means of refueling compressed gases onto the launch vehicle. When switching to engines with afterburning of oxidative gas, the situation worsened. The generator gas contains up to 5% of water vapor and carbon dioxide. In a cryogenic tank they can condense. In oxygen, after the high-pressure pump, there are also these components. They enter the oxygen after drive unit of the turbine of the booster pump. In general way, the condensed phase does not harm the pump. It causes concern among designers of systems of pressurization of tanks with oxygen due to the potential risk of a condensed phase. The purpose of the research is the safe use of oxygen vapors to boost the tanks initially containing a condensed phase. The most dangerous first tens of seconds of operation of the propulsion system were analyzed. Mass-exchange processes in the increasing free volume of a tank with oxygen are considered. The dynamics of the pressure variation of saturated water vapor in the tank and their partial pressure under a hot charge is studied. New possibilities for a sharp increase in the pressure of saturated water vapor in a tank are presented. New possible constructively simple ways of purifying the oxidative generating gas and liquid oxygen from the condensed phase are investigated. Recommendations have been worked out. Two possible principal schemes for eliminating the volume condensation of water vapor are presented and analyzed. To cope with surface condensation, a number of devices for introducing steam into the tank are proposed. Radically, the problem is solved when hot steam is injected into the tank in the form of turbulent vortex rings. The mass efficiency of steam systems with proposed schemes for purification from potential condensate is shown using the example of a tank with oxygen from a medium-sized launch vehicle.
ПЛАНУВАННЯ ВАНТАЖОПЕРЕВЕЗЕНЬ В УМОВАХ ПІДВИЩЕНИХ РИЗИКІВ
Authors: Федорович Олег Евгеньевич , Гайденко Олег Александрович , Пуйденко Вадим Алексеевич
Published: September 2023

The problem of planning of cargo transportation in the logistics chain "supply-production-sales" in terms of high risks has been stated and solved. Risk factors are analyzed and, with the help of experts, their impact on the main transportation performance is evaluated by means of full-factorial experiment planning. It makes possible to identify the significant risk factors and use them in future to take measures on risk minimization and neutralization. In order to create the cargo transportation schedules the problem of getting the most efficient transport route that minimizes the risks has been formulated and solved. The routing algorithm based on simulation for making the cargo transportation plan in terms of high risks is proposed. In order to reach the goal the distribution of "numerical" waves between the different transport hubs is used. It makes possible to find the least risky route for the vehicles. The obtained route of the movement serves as the basis for obtaining schedules of cargo passing through the transport nodes of the system, in which storage, transportation or distribution of cargo flows is possible. The algorhythm will allow the formation of rational traffic routes simultaneously for several cargo flows and delivery and acceptance points of cargo flows. The optimization of costs for cargo transportation by the selection and justification of measures aimed at minimizing risks using Boolean linear programming has been carried out. The proposed approach should be used in the tasks of planning the transportation of goods in the logistical chain "supply - production - sale" in conditions of increased external and internal risks.
РЕАЛІЗАЦІЯ АДИТИВНИХ ПРОЦЕСІВ ЗВАРЮВАННЯ ПРИ ПРОЕКТУВАННІ І ВИГОТОВЛЕННІ ДЕТАЛЕЙ ГАЗОТУРБІННИХ АВІАДВИГУНІВ
Authors: Овчинников А. В. , Басов Ю. Ф. , Петрик И. А. , Скребцов А. А. , Марченко Ю. А.
Published: September 2023

This paper presents a research of titanium alloy specimen structures obtained by electron-beam melting of domestically produced powders performed on СВ-212М type installations. Titanium alloy BT1-10 granular powders obtained by hydrogenating-dehydrogentaing have been selected as a feedstock. The 12х12х100 mm specimens have been obtained and investigated. Deposited layer structures have been investigated. Neither porosity, nor incomplete fusions in the obtained specimens have been found. A possibility for manufacturing of a part with complex geometry, employing electron-beam building up technique and the advanced titanium alloy BT1-10 powder, has been investigated
АНАЛІЗ ЗАДАЧ І АЛГОРИТМІВ ЦІЛОЧИСЛОВОЇ ОБРОБКИ ДАНИХ У СИСТЕМІ ЗАЛИШКОВИХ КЛАСІВ
Authors: Krasnobayev V. A. , Yanko A. S. , Kurchanov V. N. , Koshman S. A.
Published: September 2023

The coding of remainders number witch submitted the appropriate modules of residual classes system (RCS), made with data from complete system of the smallest non-negative residues (CSSNR) was showed in the article. In this aspect, CSSNR is the basis for the construction of non-positional code structure in RCS. Possible field of science and engineering, where there is an urgent need for fast, reliable and high-precision integer calculations were clarified and systematized in the paper. On the basis of studies of the properties of RCS were examined the advantages and disadvantages of using modular arithmetic (MA). Using the results of the analysis of problems of integer data and a set of positive attributes of MA, the classes of problems and algorithms, which using RCS, much more efficient binary positional numeral systems were defined in the article.
СИНТЕЗ ЗВОРОТНИМ ТРАСУВАННЯМ ЗОБРАЖЕНЬ ВЕКТОРНИХ ТЕКСТУР, СФОРМОВАНИХ МЕТОДОМ СФЕРИЧНОЇ ІНТЕРПОЛЯЦІЇ
Authors: Гусятин В. М. , Гусятин М. В.
Published: September 2023

In article questions of increase of realness of the scenes synthesized by method of the reverse tracing are considered. The task of visualization is solved by the reverse tracing of the vectorial textures set by straight lines and smoothed by method of spherical interpolation. Analytical ratios for implementation of each stage of visualization of such vectorial textures are given. Feature of the solution of the task is combination of a method of spherical interpolation and synthesis of the image of a vectorial texture the reverse tracing for one pass. This approach allows us to expand the joint application of these methods, including through the use of existing databases vector textures defined by straight lines
АЛГОРИТМ ШВИДКОГО ПОШУКУ СИГНАЛІВ В ПРИЙМАЧАХ GNSS
Authors: Буняева И. В.
Published: September 2023

The synthesis of digital algorithm for fast search of navigation signals in GNSS is accomplished. The architecture of the corresponding device for quick search of signals is discussed, as well as its capabilities in comparison with traditional approaches. It is proved, that the best method of achieving the required sensitivity of the algorithm (in view of the simplicity of implementation) is a cascade of coherent and non-coherent accumulation of the received signals. At the same time, it is technically easier to set the minimal possible time of the coherent accumulation, and the necessary sensitivity is to be achieved with the help of the non-coherent accumulation.
ІМІТАЦІЙНА МОДЕЛЬ СУПУТНИКОВОЇ МЕРЕЖІ КОМУТАЦІЇ ПАКЕТІВ З РІЗНОВИСОТНИМИ ОРБІТАЛЬНИМИ СЕГМЕНТАМИ
Authors: Лабуткина Т. В. , Ларин В. А. , Беликов В. В. , Борщёва А. В. , Тихонова А. А. , Деревяшкин Д. И.
Published: September 2023

A simulation model of a packet switching satellite network based on a satellite constellation with different orbit heights is presented. The model is meant for analysis of load and data routing at the initial stages of designing of a satellite constellation. Topology of the network and the load in its nodes are modeled. The notion of load of a node is introduced for modeling. This notion is based on division of the node store on an accepted number of levels. The state of a node is determined by the number of filled levels of the store. The change of the load of a node store is modeled as a process of reproduction and dying out caused by the exchange of load with the surface users of the system and the transit load flow through the node
ГЕОІНФОРМАЦІЙНА СИСТЕМА МОНІТОРИНГУ РЕГІОНАЛЬНИХ РЕСУРСІВ ТА ІНФОРМАЦІЙНО-АНЛІТИЧНОЇ ПІДТРИМКИ УПРАВЛІНСЬКИХ РІШЕНЬ
Authors: Шишко И. В. , Прохоров А. В. , Прохоров В. П. , Бурьянова М. П. , Матюшко А. О. , Алилуенко Е. О.
Published: September 2023

The research applies the generation matters of the geoinformational system for regional resources monitoring and management decision information-analytical support. The article represents the system structure, its functions, monitoring data configuration and general operational modes. The basic modes of the system are outlined. The need of application of informational system to the monitoring of the communal property subjects activity indices; analyzing diversified current information; searching for the acceptable variants of the effective regional resource management is grounded.
ВИКОРИСТАННЯ ПРЕЦЕДЕНТНОГО ПІДХОДУ ДЛЯ ФОРМУВАННЯ ПЛАНУ ЗАХОДІВ ЩОДО ПІДВИЩЕННЯ КОНКУРЕНТОСПРОМОЖНОСТІ ПІДПРИЄМСТВА, ЩО РОЗВИВАЄТЬСЯ
Authors: Федорович О. Е. , Западня К. О. , Иванов М. В.
Published: September 2023

Formulates and solves problems of choice of activities for the formation of an action plan directed on increasing competitiveness of developing enterprises. For this purpose an hierarchical database of precedent (HDP) is formed, which contains the well-known (typical) events, which previously successfully held in domestic and world practice of reforming the enterprises. Events correspond to the hierarchy of supply chain of production and HDP formed as reuse activities with values of competitiveness indicators. Qualitative values of parameters for the formation of precedential "words" in HDP are used. Directed search of "close" (required) precedents is carried out in the lexicographical sense to form an action plan to increas a competitiveness of developing enterprise.