bluuebunny/crossref_metadata_2025_split huggingface dataset:
ACOUSTIC FIELD CHARACTERISTICS UAV SCREW
Authors: Sokol G.I. , Aleksieienko S.V. , Mikhalov D.V. 
Published: May 2023

Unmanned aerial vehicles (UAVs) began to be actively used in civil and military spheres. During flight, UAV nodes emit noise into the environment, while the main radiation node is its propeller. In the civilian sphere, the noise of a drone can cause noise irritation in people, and in the military sphere, by registering this noise, it is possible to determine its bearing and destroy the aircraft. The need to get rid of these harmful factors creates the need to calculate the acoustic field of the UAV propeller.
The task: to analyze the noises that arise during the operation of the UAV; draw up a methodology for calculating the characteristics of the acoustic field of a UAV propeller; develop a program-methodology for measuring characteristics of the acoustic field of a UAV propeller and conduct measurements; to propose methods of noise reduction from propellers.
In the actual work, an analytical review of the designs of modern UAVs was carried out, which made it possible to choose the type of drone for research. They became the FPVRaptor V2, which was specially designed for flights with a camera on board to create videos. In addition, FPV Raptor V2 has good flight qualities.
The considered characteristics of the drone and its equipment. The main sources of noise when flying a UAV are its engines and propellers. In addition, noise is generated by the airframe and its equipment due to vibrations caused by the imbalance of assemblies and propellers. Vibrations are caused by the skin of the UAV, loose connections, poorly fixed equipment units. The FPVRaptor V2 UAV uses an electric motor, which is the quietest motor used on a drone. Provided that the parts of the drone are connected tightly and the equipment assemblies are securely fastened, the source of the noise is the propeller. The noise generated during the operation of UAV propellers was analyzed. On the basis of theoretical information on determining the acoustic characteristics of a UAV, a new method of calculating the sound pressure in the acoustic field of UAV propellers was developed. The physical and mathematical models proposed by L. Ya. Gutin were used to create the calculation methodology. The MathCAD program was used for calculations. The program allows you to calculate the characteristics of the acoustic field of the propeller of the drone. Based on the results of the calculations, graphs of the directionality of the acoustic field were constructed. The highest level of sound pressure is observed for the fundamental tone, a lower level for the second harmonic, even lower for the third, and so on. For the fundamental tone, the maximum sound pressure level is 1.9222Pa or 99.655dB, which is observed at angles of approximately 132º and 48º
PROFESSIONAL RESEARCH-TRAINING IN THE PROCESS OF TRAINING IN THE EDUCATIONAL PROGRAM OF THE SPECIALTY "AVIATION AND ROCKET AND SPACE TECHNOLOGY"
Authors: Shevtsov V.U. , Davydova A.V. 
Published: May 2023

High-quality training of professional specialists in the rocket and space industry is impossible without the initiation and development of creative research thought in the process of developing new, promising samples of the future equipment and technologies for their production and operation. The development and formation of skills of research creative activity should begin already during training in high school and be formalized to the working level while studying at higher educational institutions.
In the presented work, within the framework of the educational and scientific program for the preparation of bachelors in the specialty "Aviation and Rocket and Space Technology", special attention is paid to the problematic issues of today and promising areas of their solution, which is reflected in the "first place", in the process of teaching professional special courses. An important component of research training is also the presentation and consideration of problematic issues at a professional student seminar, which is regularly, twice a month, held on line and the participation of teachers and graduate students of the department of design and construction of rocket and spacecraft of Oles Honchar Dnipro National University. The result of this seminar is the annual submission of up to twenty to thirty reports only for the international youth scientific and practical conference "Man and Space".
For a conscious choice of the direction of individual creative activity in the work, a list of questions offered by the department for research work of bachelors and masters that may be of interest to employees of basic enterprises in the industry is given.
Festa e política em Rousseau
Authors: De Araújo e Viana Leite Rafael 
Published: May 2023

Este artigo busca explicitar a articulação entre estética e política em Jean-Jacques Rousseau. A investigação se fixará introdutoriamente na ideia de espetáculo no século XVIII para, em seguida, deter-se na festa pública tal como ela é explicitada na Carta a D’Alembert, com o objetivo de ressaltar os elementos estéticos e ético-políticos da teoria de festa em Rousseau.
Development of extruded animal feed based on fat and oil industry waste
Authors: Petik Ihor , Litvinenko Olena , Kalyna Viktoriia , Ilinska Olha , Raiko Valentina , Filenko Olesia , Lutsenko Maryna , Romanova Tetiana , Svishchova Yana , Ivakin Oleksii 
Published: May 2023

The paper considers the way to solve the problem of processing waste from the oil and fat industry, namely sunflower and soybean meals, which are a source of many valuable substances. The peculiarity of the work lies in determining the rational ratio of the base components of extruded animal feed, which is an important aspect of obtaining high-quality competitive products.
The research object is the use of oil and fat industry waste in extruded animal feed technology. The rational ratio of the components of extruded animal feed has been determined. The rational ratio of animal feed components is: sunflower meal – 0.40 parts by weight; soybean meal – 0.25 parts by weight; oatmeal – 0.35 parts by weight. The animal feed sample with justified composition corresponds to the commercial analogue in terms of porosity (72 % and 76 %, respectively) and cost ($285/t and $285/t, respectively). In addition, the extruded feed with the developed composition exceeds the commercial analogue in terms of protein content by 3.2 times and essential amino acids content by 2.9 times. The obtained data are explained by the use of a complex of components, namely oil and fat waste and starch-containing grain raw materials with various limiting amino acids and various technological features of the extruded mass of their mixture. The feature of the obtained results is the possibility to control the technological characteristic (porosity) of the finished product depending on the components ratio, which allows changing product characteristics according to consumer requirements. The research results make it possible to efficiently process secondary products of oilseed processing into a new competitive marketable product. From a practical point of view, the technology makes it possible to reduce the cost of storage/utilization of industry waste, get additional income from new products sales and improve environmental conditions. The applied aspect of using the scientific result is the possibility to create a range of animal feed with different technological indicators depending on the components ratio.
Determining the influence of compressor flow path abrasive wear on the gas turbine engine characteristics
Authors: Datsenko Vadym , Boyko Ludmila 
Published: May 2023

The operation of a gas turbine engine (GTE) in a dusty atmosphere leads to wear of the elements of the flowing part and, as a result, to a deterioration in its parameters and characteristics.
Helicopter and tank gas turbine engines operating in a dusty atmosphere, as well as gas turbine units of compressor stations operated in areas with high dust concentrations, are subjected to the greatest wear. When operating GTE under such conditions, the compressor is subjected to stronger wear. In this regard, the task addressed in this paper is determining the effect of abrasive wear of the compressor on GTE parameters. To this end, a method for calculating the GTE characteristics is built, making it possible to take into account the effect of abrasive wear of the flow path and blade crowns of the compressor.
Underlying the calculation method is a nonlinear mathematical model that makes it possible to describe the processes occurring in individual nodes and in the engine as a whole under stationary modes. A feature of this method is the two-dimensional description of the compressor in the engine system. The method reported here makes it possible to quickly estimate the effect of deviation of the geometric parameters of the flow path from the rated values on the characteristics of the compressor and engine as a whole.
The geometric parameters of the degraded-out axial compressor were simulated on the basis of wear data. The parameters and characteristics of the degraded-out compressor, as well as the gas turbine engine as a whole, were calculated. It was found that with a given wear of the flow path of the compressor, the specific power of the engine decreased by 7.5 % while specific fuel consumption increased by 6.4 %, and the stability margin decreased by 11.1 % compared to the original ones.
The results could be used to analyze and predict the operational efficiency of engines when they operate under conditions of high dustiness.
Determining patterns in loading the body of a gondola with side wall cladding made from corrugated sheets under operating modes
Authors: Vatulia Glib , Lovska Alyona , Myamlin Sergiy , Rybin Andrij , Nerubatskyi Volodymyr , Hordiienko Denys 
Published: May 2023

The object of research is the processes of emergence, perception, and redistribution of loads in the body of a universal railroad gondola with a cladding of corrugated sheets.
To improve the strength of the sheets of cladding, it is proposed to strengthen the most loaded area in terms of height (1/3 of the bottom tie-up) with horizontal corrugations. Determination of the geometric parameters of the corrugation is carried out by the moment of resistance of the sheet. The dynamic load of the gondola body with improved cladding was determined by mathematical modeling. The fluctuations of the jump were taken into consideration, that is, the translational movements of the body relative to the vertical axis. The results of the solution of the mathematical model have made it possible to conclude that the studied dynamics indicators are within the permissible limits while the car movement is estimated as "excellent".
The calculation was performed of the strength of the body of a gondola with improved cladding. It has been established that the strength of the gondola body under the main operating load modes is ensured. According to the results of calculations of static strength, the calculation was performed of the fatigue strength of the gondola body. It must be said that the fatigue strength of the body cladding increases by 3.7 % compared to the typical one.
A feature of the results obtained is that the proposed improvement of the cladding can be carried out not only at the design stage but also during repairs of cars.
The scope of practical use of the results includes the engineering industry, in particular railroad transportation. At the same time, the conditions for the practical application of the research results are compliance with the requirements for loading and unloading operations of gondola cars.
The results of the current research will contribute to devising recommendations for the design of modern structures of gondolas and for improving the efficiency of their operation.
Improving the production technique of meat chopped semi-finished products with the addition of dried semi-finished product with a high degree of readiness
Authors: Zahorulko Andrii , Zagorulko Aleksey , Yancheva Maryna , Savinok Oksana , Yakovets Lyudmila , Zhelievа Tetiana , Skoromna Oksana , Sushko Larysa , Kainash Alla , Tytarenko Nataliia 
Published: May 2023

The object of this study is a production technique of meat chopped semi-finished products with the addition of dried semi-finished product based on Jerusalem artichoke and zucchini.
The production technique of meat chopped semi-finished products with the addition of dried semi-finished products of a high degree of readiness (Jerusalem artichoke and zucchini) has been improved. The dried semi-finished product is manufactured by a low-temperature drying technique in an IR field at a temperature of 45...60 °C to the final solids content of 12...15 %. The adsorption properties of the dried semi-finished product of a high degree of readiness were determined and it was established that its swelling takes place due to the absorption of the water-fat emulsion while there is an actual increase in the volume of the semi-finished product by 2.3...2.6 times.
A feature of the production technique of meat chopped semi-finished products with the addition of a high-readiness dried semi-finished product to the recipe is frying in an apparatus with functionally closed media. The duration of frying in the proposed apparatus with functionally closed media compared to the conventional technique is reduced by 2.4 times. Introduction to the recipe of meat chopped semi-finished products of dried semi-finished products based on Jerusalem artichoke and zucchini reduces total weight loss by 11.9 % of meat culinary products without shrinkage. The data on the chemical composition of meat chopped semi-finished products with the addition of dried semi-finished products in comparison with the control confirm the increase in the nutritional value of the prototype while the energy value is reduced by 19 %. The implementation of the improved technique will make it possible to obtain a competitive range of meat chopped products with natural ingredients that increase the nutritional value of products and eliminate the use of artificial ingredients.
Improvement of the production technology of tokay wines based on the revealed effect of enzyme activity on the quality of grape variety
Authors: Bagirzadeh Afaq , Omarov Yashar , Haciyeva Aygun , Gurbanova Sevda , Gasimova Afet , Ismayilov Mehman , Nabiyev Ahad 
Published: May 2023

Wines of the Tokay type are produced using a special technology. According to Hungarian technology, for the production of these wines, bunches of white and red grape varieties are twisted on the vine, withered for a certain time, then dropped for processing. At the same time, the percentage of sugar in grapes is artificially increased due to the evaporation of moisture. In pre-dried grapes, the percentage of sugar should be in the range of 40–45 %. For the production of Tokay-type wines, the fermentation of grape must is carried out naturally without the addition of alcohol and other ingredients. After formation in the must of 14‒16 vol. % alcohol, the fermentation process is suspended naturally. As a result, natural sugar and alcohol remain in the wine material. Withered grape varieties, despite their high sugar content, are economically inefficient due to low juice yield and a quantitative decrease in extractive substances. Thus, the enrichment of wine material for the production of Tokay-type wines has not been studied. As an object of research, ripe technical grape varieties Bayan Shirey, Rkatsiteli, Cabernet Sauvignon, Madrasa cultivated in the foothills of the Geygol district and in the low-lying zone of the Samukh district were used. Grape varieties were harvested from the vineyards of the winery, located in the Goygol district and from the farm "Amin", located in the village of Gara-Yeri, Samukh district. For the production of wine, both ripe and separately withered grape varieties were used, twisting on the vine for 10–12 days. However, when twisted on the vine, about 15–20 % of the bunches of grapes break and fall to the ground. Further, in ripe and withered grape varieties, the quantitative content of dry matter, total sugar, including glucose and fructose, phenolic compounds, titratable acidity, vitamin C, and in both variants the yield of unclarified juice was determined separately. The regularities of increasing the activity of enzymes of the class oxidoructase and a representative of hydrolase-pectinesterase were considered. The results make it possible to adjust the quality indicators of grape varieties depending on their zoning and use them for the production of high-quality Tokay-type wines.
Development of a method for assessing the functioning of a grain product sub-complex using mathematical modeling
Authors: Beisekova Perizat , Ilyas Assel , Kaliyeva Yelena , Kirbetova Zhanar , Baimoldayeva Meruert 
Published: May 2023

The object of the study is the process of functioning of enterprises of the grain product subcomplex. In the course of the study, the problem of the growth rate and the peculiarities of the functioning of enterprises of the grain product subcomplex were solved.
An assessment of the functioning of the grain product subcomplex was carried out Republic of Kazakhstan using mathematical modeling, for which a methodology has been developed that allows considering factors with a heterogeneous metric, which includes the following steps:
1) index analysis twenty-one indicators, divided into groups;
2) development of formulas for calculation and integral indicators characterizing their dynamics;
3) determining the pace of functioning of the grain product subcomplex for 2011–2021. Graphs were made and a forecast of the performance indicators of the subcomplex until 2024 is presented for one of each group with the maximum coefficient of determination R2. According to three scenarios: optimistic, probabilistic and pessimistic. R2 is an indicator of the quality of forecasts: than the closer its value is to one, the higher the probability of execution. For eleven charts, the coefficient of determination is in the range from 0.9003 (pessimistic forecast for other industrial use of grain) to 0.9838 (optimistic forecast for the number of granaries). For ten, from 0.8025 to 0.8702, and for nine, from 0.705 to 0.7932. This means that the reliability of the calculations for twenty-nine forecast options is in the range from 70 to 98 %. This indicates fairly objective predictive values of the subcomplex performance indicators until 2024. Based on the results of the studies, optimistic and pessimistic scenarios are more likely to be implemented.
Development of technology of boiled sausage from non-traditional raw materials
Authors: Tayeva Aigul , Kozhakhiyeva Madina , Jetpisbayeva Bagila , Tlevlessova Dinara , Samadun Abdyssemat , Valiyv Aivaz 
Published: May 2023

This paper considers the possibility of improving the functional and technological properties of boiled camel sausage with the addition of hump fat and chicken fillet. The effect of pumpkin peel powder on lipid oxidation, functional and technological properties of sausages from combined meat was investigated. Camel meat as a meat product has many advantages, for example, low fat content, high nutritional value, and its taste is barely distinguishable from beef. At the same time, it has the following disadvantages: sweetish taste, coarse-fiber structure; camel sausage has a lower shelf life compared to beef sausage; it is harder due to the content of hydroxyproline. To improve the functional and technological properties, dried rowan powder and pumpkin peel powder of the "Winter Sweet" variety, a zoned variety, were added in different quantities for comparison. The control sample was made in accordance with GOST for boiled sausage, with the replacement of fat with hump fat, and the replacement of beef with camel meat. For experimental samples, a plan for a full-factor experiment was built, taking into account the material balance. Additives varied in 3 levels, from 3 to 6 %. 7 samples with control were in total with the control sample being the sausage prepared according to the same recipe but without additives. There were three parallel experiments in each sample. It was revealed that hydrated rowan powder has a negative effect on taste but, at lower doses, it gives a spicy taste to the sausage while the addition of hydrated powder from pumpkin peels improves taste and organoleptic characteristics. Thus, one can conclude that waste in the form of pumpkin peels is also a valuable and useful product for improving the functional, technological, and organoleptic characteristics of sausage. The result of this study shows that when hydrated rowan powder and pumpkin peel powder are added, the problem of taste, aftertaste, smell, and shelf life is solved in the selected ratio, while the sausage also becomes more tender overall
Improvement of the solution search method based on the cuckoo algorithm
Authors: Mohammed Basem Abdullah , Zhuk Oleksandr , Vozniak Roman , Borysov Ihor , Petrozhalko Volodymyr , Davydov Igor , Borysov Oleh , Yefymenko Oleksandr , Protas Nadiia , Kashkevich Svitlana 
Published: May 2023

An improved method of finding solutions based on the cuckoo algorithm is proposed. The research object is the decision-making support systems. The research subject is the decision making process in management tasks using artificial intelligence methods. The hypothesis of the research is to increase the efficiency of decision making with a given assessment reliability. The proposed method is based on a combination of the cuckoo algorithm and evolving artificial neural networks. The method has the following differences:
‒ an additional processing of the source data takes place taking into account the uncertainty about the state of the control objects and the type of data noise about the state of the control object is additionally taken into account;
‒ the state model of the control object is adjusted taking into account the available computing resources of the system;
‒ added procedures to reduce the probability of detecting nests and reducing the length of the cuckoo’s step;
‒ knowledge bases about management objects are additionally taught. The training procedure consists in learning the synaptic weights of the artificial neural network, the type and parameters of the membership function and the architecture of individual elements and the architecture of the artificial neural network as a whole. The effectiveness of the proposed method was evaluated and it was established that the proposed modification provides a better value of the objective function compared to the results obtained by other authors and ensures the fulfillment of all restrictions. The specified example showed an increase in the efficiency of data processing at the level of 21–28 % due to the use of additional improved procedures. It is advisable to use the proposed method in decision making support systems of automated control systems.