bluuebunny/crossref_metadata_2025 huggingface dataset:
Polityczna imitacja jako źródło współczesnej kontrrewolucji w postkomunistycznej Europie – próba ujęcia teoriopolitycznego
Authors:   Uniwersytet Kazimierza Wielkiego w Bydgoszczy, Polska, Lewandowski Arkadiusz
Published: December 2021

The main goal of this article is analysis of the influence of the policy of imitation on the phenomenon of counterrevolution. The aim of the article was to answer the research question whether the politics of imitation and counterrevolution at the level of theoretical considerations can constitute elements of one theory concerning the crisis of liberal democracy in post-communist European countries? The detailed question was whether political imitation is a category by which it is possible to explain the causes of the process of counterrevolution in post-communist Europe? The considerations are based on the concepts of Jan Zielonka, as well as the ideas of Ivan Krasett and Stephen Holmes. In accordance with the principles postulated by Ivan Krastew and Stephan Holmes, the politics of imitation is an important reason for the success of populist, which Jan Zielonka equates with counterrevolution. Negative opinions about the course of the systemic transformation mainly focus on its lack of alternatives, on the problem of imposing liberal values, and on the problem of economic stratification. These premises also constitute the basis for the contemporary problems of the crisis of liberal democracy.
Koncepcja i implementacja wschodniej polityki bezpieczeństwa energetycznego prezydenta Lecha Kaczyńskiego w latach 2005–2010
Authors:   Uniwersytet Marii Curie-Skłodowskiej w Lublinie, Polska, Mazur Grzegorz
Published: December 2021

The aim of the article is to present the political concept of Lech Kaczyński in terms of ensuring gas security and, more broadly, energy policy during his 2005–2010 presidency. The issues of political cooperation of this statesman will be discussed here, both within international organizations, such as GUAM, and within the framework of international bilateral relations. The work also answers the question about the possibility of implementing this policy in the context of Poland’s geopolitical position (proximity to Russia) and its impact on the GUAM countries or Kazakhstan.
Development of a fuzzy GERT-model for investigating common software vulnerabilities
Authors: Semenov Serhii , Zhang Liqiang , Cao Weiling , Bulba Serhii , Babenko Vira , Davydov Viacheslav
Published: December 2021

This paper has determined the relevance of the issue related to improving the accuracy of the results of mathematical modeling of the software security testing process. The fuzzy GERT-modeling methods have been analyzed. The necessity and possibility of improving the accuracy of the results of mathematical formalization of the process of studying software vulnerabilities under the conditions of fuzziness of input and intermediate data have been determined. To this end, based on the mathematical apparatus of fuzzy network modeling, a fuzzy GERT model has been built for investigating software vulnerabilities. A distinctive feature of this model is to take into consideration the probabilistic characteristics of transitions from state to state along with time characteristics. As part of the simulation, the following stages of the study were performed. To schematically describe the procedures for studying software vulnerabilities, a structural model of this process has been constructed. A "reference GERT model" has been developed for investigating software vulnerabilities. The process was described in the form of a standard GERT network. The algorithm of equivalent transformations of the GERT network has been improved, which differs from known ones by considering the capabilities of the extended range of typical structures of parallel branches between neighboring nodes. Analytical expressions are presented to calculate the average time spent in the branches and the probability of successful completion of studies in each node. The calculation of these probabilistic-temporal characteristics has been carried out in accordance with data on the simplified equivalent fuzzy GERT network for the process of investigating software vulnerabilities. Comparative studies were conducted to confirm the accuracy and reliability of the results obtained. The results of the experiment showed that in comparison with the reference model, the fuzziness of the input characteristic of the time of conducting studies of software vulnerabilities was reduced, which made it possible to improve the accuracy of the simulation results.
Determining patterns in thermoelastic interaction between a crack and a curvilinear inclusion located in a circular plate
Authors: Zelenyak Volodymyr , Klapchuk Myroslava , Kolyasa Lubov , Oryshchyn Oksana , Vozna Svitlana
Published: December 2021

A two-dimensional mathematical model of the thermoelastic state has been built for a circular plate containing a curvilinear inclusion and a crack, under the action of a uniformly distributed temperature across the entire piece-homogeneous plate. Using the apparatus of singular integral equations (SIEs), the problem was reduced to a system of two singular integral equations of the first and second kind on the contours of the crack and inclusion, respectively. Numerical solutions to the system of integral equations have been obtained for certain cases of the circular disk with an elliptical inclusion and a crack in the disk outside the inclusion, as well as within the inclusion. These solutions were applied to determine the stress intensity coefficients (SICs) at the tops of the crack.
Stress intensity coefficients could later be used to determine the critical temperature values in the disk at which a crack begins to grow. Therefore, such a model reflects, to some extent, the destruction mechanism of the elements of those engineering structures with cracks that are operated in the thermal power industry and, therefore, is relevant.
Graphic dependences of stress intensity coefficients on the shape of an inclusion have been built, as well as on its mechanical and thermal-physical characteristics, and a distance to the crack. This would make it possible to analyze the intensity of stresses in the neighborhood of the crack vertices, depending on geometric and mechanical factors.
The study's specific results, given in the form of plots, could prove useful in the development of rational modes of operation of structural elements in the form of circular plates with an inclusion hosting a crack.
The reported mathematical model builds on the earlier models of two-dimensional stationary problems of thermal conductivity and thermoelasticity for piece-homogeneous bodies with cracks.
The formation of economic and marketing prospects for the development of the market of information services
Authors: Pererva Petro , Nazarenko Stanislav , Maistro Ruslana , Danko Taras , Doronina Maya , Sokolova Liudmyla
Published: December 2021

This paper investigates the current state and prospects of the development of the European IT services market. A detailed analysis of the economic indicators of the IT market in European countries has been conducted. Marketing characteristics of the external market of IT services were considered, in whose formation a leading role belongs to export deliveries. It has been determined that the capacity of the international segment of the IT services market in most European countries increases by an average of 20 % annually, and the share of IT technologies exports in the overall export structure exceeds 8 %. The forecast of changes in the internal market of IT technologies in the post-Soviet countries was analyzed. Based on the results, it was concluded that in the future the capacity of the domestic IT services market could increase and, in 2024, in particular in Ukraine, would exceed the volume of USD 2 billion. The results of studying the level of prices for IT services in the post-Soviet countries suggest that they mainly correspond to the prices for similar services in different groups of European countries (with different material capabilities). That means that for IT service consumers in countries with a low standard of living, price characteristics are not an obstacle to obtaining the highest quality services from domestic or foreign suppliers. The role and importance of personnel support of the information industry, which is key in the formation and development of the IT services market, have been determined. It has been proven that specialists who attained IT education mostly work according to the skills and competencies obtained, which distinguishes them favorably from specialists in other fields. Despite the tendencies of a certain outflow of specialists outside the countries with a low living level, the number of IT specialists is growing progressively in their economies. In many ways, these trends are facilitated by an increase in the number of graduates from specialized educational institutions.
Determination of the magnitude of short-circuit surge current for the construction of relay protection on reed switches and microprocessors
Authors: Neftissov Alexandr , Biloshchytskyi Andrii , Talipov Olzhas , Andreyeva Oxana
Published: December 2021

A study of the functioning of reed switches under the influence of a magnetic field created by a current in a conductor in a transient mode with the presence of an aperiodic component has been carried out. A well-known method for determining current using reed switches was implemented. At the same time, it was determined that the originally formulated method did not give the required result within the limits of errors. This is most likely due to the peculiarities of the mechanism of movement of the reed switch contacts. Alternatively, the measurements were taken to take the return currents instead of the pick-up currents and the time between the return times. They are more stable. Simulation is performed, experimental determination of the value of surge current by measuring time is carried out. The main element of the created installation was the power transformer coil with low active and high inductive resistance. As part of the study, the reed switches were placed in a magnetic field with an aperiodic component, as in the transient mode. This study will show the applicability of reed switches for the construction of relay protection devices that will not need current transformers to obtain information about the primary current in the conductor. In the course of the research, it was found that the error in determining the magnitude of current was no more than 10 %. Using microprocessors, it is possible to build relay protection devices with a speed of up to 20 ms. This result makes it possible to build new devices. Since in the well-known developments, it was only said about determining the magnitude of current in a steady state. When building relay protection devices on reed switches, without using current transformers, it will be possible to build backup protections that duplicate not only the devices themselves, but also the primary measuring transformers with other sensitive elements. This will improve the reliability of the power supply.
Prediction of combined cycle power plant electrical output power using machine learning regression algorithms
Authors: Santarisi Nader S. , Faouri Sinan S.
Published: December 2021

In order to monitor the performance and related efficiency of a combined cycle power plant (CCPP), in addition to the best utilization of its power output, it is vital to predict its full load electrical power output. In this paper, the full load electrical power output of CCPP was predicted employing practically efficient machine learning algorithms, including linear regression, ridge regression, lasso regression, elastic net regression, random forest regression, and gradient boost regression. The original data came from an actual confidential power plant, which was working on a full load for 6 years, with four major features: ambient temperature, relative humidity, atmospheric pressure, and exhaust vacuum, and one target (electrical power output per hour). Different regression performance measures were used, including R2 (coefficient of determination), MAE (Mean Absolute Error), MSE (Mean Squared Error), RMSE (Root Mean Squared Error), and MAPE (Mean Absolute Percentage Error). Research results revealed that the gradient boost regression model outperformed other models with and without using the dimensionality reduction technique (PCA) with the highest R2 of 0.912 and 0.872, respectively, and had the lowest MAPE of 0.872 % and 1.039 %, respectively. Moreover, prediction performance dropped slightly after using the dimensionality reduction technique almost in all regression algorithms used. The novelty in this work is summarized in predicting electrical power output in a CCPP based on a few features using simpler algorithms than reported deep learning and neural networks algorithms combined. That means a lower cost and less complicated procedure as per each, however, resulting in practically accepted results according to the evaluation metrics used.
Defining patterns of heat transfer through the fire-protected fabric to wood
Authors: Tsapko Yuriy , Tsapko Аleksii , Bondarenko Olga
Published: December 2021

Under the thermal action on wood when applying a protective screen made from fire-retardant fabric, the process of temperature transfer is natural. It has been proven that depending on the thermal properties of the coating of fire-proof fabric, this could lead to varying degrees of heat transfer. Therefore, it becomes necessary to study the conditions for establishing low thermal conductivity and establishing a mechanism that inhibits heat transfer to wood. Given this, a mathematical model has been built of the process of heat transfer to wood when it is protected by a screen made of fire-proof fabric. According to the experimental data on determining the temperature on the non-heated surface of the fabric and the resulting dependences, the density of the heat flow transmitted to wood through fire-proof fabric was determined. Thus, with an increase in the temperature, the density of the heat flow to the surface of the wood through a protective screen made of fire-proof protected coating based on "Firewall-Attic" increases to a value above 16 kW/m2, which is not sufficient for ignition of wood. Instead, the density of the heat flow through the protective screen of fire-proof fabric protected by the "Firewall-Wood"-based coating did not exceed 14 kW/m2. This makes it possible to argue about the compliance of the detected mechanism of formation of heat-insulating properties in the protection of wood and the practical attractiveness of the proposed technological solutions. Thus, the peculiarities of inhibition of the process of heat transfer to wood through a protective screen made of fire-proof fabric under the action of a radiation panel imply the formation of a heat-insulating layer of coked cellular material when decomposing the coating. Thus, on the surface of the fire-proof fabric, a temperature above 280 °C was achieved and, on an untreated surface of the fabric, it did not exceed 220 °C, which is insufficient for the ignition of wood.
Design of an universal source for semi-automatic ac welding and induction heating
Authors: Burlaka Vladimir , Lavrova Elena , Podnebennaya Svetlana , Ivanov Vitaliy , Burikov Serhii
Published: December 2021

This paper proposes a circuit solution and a power source control algorithm for semi-automatic AC welding with improved energy and weight-size characteristics. A distinctive feature of the designed source is the absence of an input rectifier: welding is carried out with a high-frequency alternating current. That has made it possible to significantly reduce power losses in the source, as well as provide the possibility of implementing induction heating by connecting an inductor to the source output.
Another distinctive feature of the designed source is an increased power factor and a reduced level of higher harmonics of the current consumed. The power factor of the described source reaches 0.94 against 0.5÷0.7 for sources equipped with a conventional rectifier with capacitive smoothing.
The designed source's composition includes a power supply system for the wire feed drive with speed stabilization due to positive feedback on the motor current. That has made it possible to ensure the stable operation of the drive in a wide range of speeds. A model has also been developed of a flux wire welding torch containing a feed drive and a coil with a wire (up to 100 mm in diameter), placed, in order to reduce the size, in the handle of the torch.
In addition to the welding function, the source makes it possible to solve the tasks related to induction heating and/or hardening of small parts; to that end, a compact inductor is connected to its output.
Tests of the source showed the feasibility of the proposed ideas and circuit solutions. The dimensions of the source are 190×107×65 mm; weight, 1.4 kg; output current, up to 120 A. The proposed technical solution enables the construction of small-sized, lightweight, universal, easy-to-use power supplies for semi-automatic welding with the option of induction heating
Implementation of reengineering technology to ensure the predefined geometric accuracy of a light aircraft keel
Authors: Maiorova Kateryna , Vorobiov Iurii , Boiko Maksym , Suponina Valeriia , Komisarov Oleh
Published: December 2021

The subject of this research is the technology of reengineering and control of parts of aircraft objects (AOs) and technological equipment for their manufacture. The predefined accuracy of the keel of a light aircraft and molding surfaces of technological equipment for its manufacture has been ensured by using reengineering technology and CAD systems. A portrait of the actual physically existing keel of a light aircraft was built in the *.stl file format using the software Artec Studio (USA). The control and comparison of the geometry of the shapes of the analytical standard with the actual physically existing keel of a light aircraft based on its portrait have been implemented. The methods used are the analysis and synthesis of the experimental geometry of shapes, the method of expert evaluations. The following results were obtained: based on the analysis and synthesis, the presence of significant errors in the accuracy of the manufacture of the keel for a light aircraft in the range from −5.26 mm to +5.39 mm was detected. It has been shown that the key factor is the keel's relative plane indicator, which is outside the tolerance margin and is 85 %. It was decided to fabricate new technological equipment from another material – organic plastics. Control of the technological equipment made from organic plastics for the keel of a light aircraft showed that the shape-forming surfaces of the equipment have appropriate shapes and sizes corresponding to the existing analytical standard and are devoid of inaccuracies that occurred in the previous version. The range of keel margins that was made using the new technological equipment from organic plastics is from –0.51 mm to +0.34 mm while the relative plane of the keel outside the tolerance margin does not exceed 15 %. The study results showed the adequacy of the decisions taken, ensuring the predefined accuracy for the keel of a light aircraft and molding surfaces of technological equipment for its manufacture.
Food safety of plasma-chemically activated water and bread made with its use
Authors: Mykolenko Svitlana , Pivovarov Olexandr , Yefimov Valentyn , Sova Nataliia , Tymchak Dmytro
Published: December 2021

Water treatment by contact non-equilibrium low-temperature plasma refers to innovative methods of processing food raw materials, which requires determining the level of safety of its use to meet the requirements of food safety for humans. The test animals were divided into four test groups with two different basic diets. The tested substances were drinking main water (control group) and plasma-chemically activated water (experimental group); wheat bread (control group) and wheat bread produced using plasma-chemically activated water (experimental group). It was found that there was no significant difference between the control and experimental groups of animals in body weight and its changes during 90 days of the introduction of the test substances into the diet. The amount of water and feed consumed was in direct proportion to the change in the weight of animals in the corresponding diets.
The hematological and biochemical analysis of the blood of the test rats did not confirm the toxic or allergenic effect of the studied feeding factors on their organism. An increase in the number of erythrocytes in the blood and activation of the phagocytic activity of experimental groups of animals were confirmed. This confirms the positive effect of plasma-chemically activated water and wheat bread made with its use on metabolic processes in the body of animals.
Macromorphological parameters of the body of animals and the results of histological studies of the stomach, liver, kidneys and femur as potential target organs demonstrated the absence of dystrophic-degenerative changes in these organs. A comprehensive study of the food safety of plasma-chemically activated water and wheat bread made with its use proves the possibility of using an innovative method of water treatment in food production.
Development of a method of coordination of project and operational activities in the process of manufacturing complex knowledge-intensive products
Authors: Teslia Iurii , Khlevna Iulia , Yehorchenkov Oleksii , Latysheva Tatiana , Grigor Oleg , Tryus Yuriy , Prokopenko Tеtiana , Polishchuk Oksana
Published: December 2021

It is shown that the production processes of project-oriented enterprises focused on manufacturing complex knowledge-intensive products combine project and operational activities. Analysis of project management methodologies in terms of their suitability for managing the activities of project-oriented enterprises engaged in manufacturing these products was conducted. It was found that project management methodologies do not address this issue, remaining outside the scope of project managers. To eliminate this shortcoming of the project management methodology, it was proposed to supplement it with the concept and method of coordination of project and operational activities in the process of manufacturing complex knowledge-intensive products.
The concept of integration of project and operational activities in the process of manufacturing complex knowledge-intensive products was proposed. A method of coordination of project and operational activities in the process of manufacturing complex knowledge-intensive products was developed. The following criteria were proposed: management of operational processes as processes depending on the progress of projects; evaluation of the success of projects taking into account the assessment of their provision with products of operational activities. A model for calculating the number of components to be produced during the implementation of projects of manufacturing complex knowledge-intensive piece products was developed. The method of multiple simulations of project and operational processes in projects of manufacturing complex knowledge-intensive products was proposed.
The developed concept and method passed practical testing at enterprises engaged in manufacturing complex knowledge-intensive products, in particular, Karbon Invest, LLC (Ukraine), and showed high efficiency of managing projects of manufacturing complex knowledge-intensive products. The developed tools allow creating integrated management systems for project and operational production of complex knowledge-intensive products.
Determining the impact of digitalization on the economic security of trade
Authors: Zubko Tetiana , Hanechko Iryna , Trubei Oksana , Afanasyev Kostyantyn
Published: December 2021

The modern system of relations between countries is being transformed with the spread of digitalization. Accordingly, there is a need to study the practical aspects of digitalization of trade as a major component of international relations. Therefore, this study aims to determine the impact of digitalization processes on the performance and economic security of trade. The main directions for the development of digitalization in trade were determined and the influence of digital technologies on the economic security of trade entities (enterprises) was investigated.
The main components of the economic security of trade enterprises were identified. The main difficulties in the development of the digital economy were highlighted. The main directions for the development of digitalization of trade enterprises were determined.
The list of factors that most influence the formation of trade turnover was substantiated: income of the population, number of trade workers, inventories, producer price indices, digital technologies (telecommunications, data processing, etc.).
Methods of economic statistics (statistical observation, dynamic and structural analysis) were used to test the hypothesis of the relationship between informatization and economic security of trade enterprises. Methods of correlation and regression analysis were used to study the strength of the relationship between the volume of turnover and the factors that determine it.
Based on the modeling, a statistically significant relationship was identified between the indicators of the volume of information and related services and trade volumes, which confirms the dependence of the economic security of trade enterprises on digitalization. The proposal to supplement the already existing methodology for assessing the economic security of the trade enterprise with indicators reflecting the impact of digital technologies was justified. The results of the study can be useful for adapting strategies for the development of trade enterprises in the context of the global digital ecosystem.
Establishment of the dependence of the strength indicator of the composite material of pressure hoses on the character of single damages
Authors: Nazarenko Sergii , Kushnareva Galina , Maslich Natalia , Knaub Ludmila , Naumenko Nataliia , Kovalenko Roman , Konkin Valery , Sukharkova Elena , Kolienov Oleksandr
Published: December 2021

Experimental studies are presented and the dependence of the change in the strength of the material of a pressure head fire hose of type T with an inner diameter of 77 mm in the longitudinal direction is established, taking into account single damages. The work describes the plan of the experiment and carried out a number of field experiments to determine the effect of the length ld and the depth K damage on the strength F of the hose material, that is, obtaining the dependence F=f (ld, K). A mathematical method of experiment planning was used and a plan was drawn up for a complete multivariate experiment of type 2k with an acceptable model accuracy of 5 %. The limits of variation of the factors are set taking into account a priori information, experimental capabilities and on the basis of the results of preliminary search experiments. The dependence in the coded and natural values of the factors is obtained. The reliability of the relationship was checked using the Fisher test, the calculated value of which was 5.98, which confirms the adequacy of the described process with a probability of 95 %.
Analyzing experimental studies of the dependence of the change in the strength of the hose material on the length and depth of damage, it can be said that the change in the strength of the hose almost linearly depends on the specified damage parameters. It is found that with increasing damage, the strength of the hose material significantly decreases. When varying the length factor and the greatest depth of damage, K=0.4 mm, the strength of the hose material decreases from 11.67 kN to 8.77 kN, and in percentage terms by 25 %.
The results obtained can be used in practical units of emergency rescue teams, when diagnosing hidden damage in pressure head fire hoses in order to prevent their failure in case of fires
Development of mandelbrot set for the logistic map with two parameters in the complex plane
Authors: Ahmed Wasan Saad , Abbas Saad Qasim , Khamees Muntadher , Jaber Mustafa Musa
Published: December 2021

In this paper, the study of the dynamical behavior of logistic map has been disused with representing fractals graphics of map, the logistic map depends on two parameters and works in the complex plane, the map defined by f(z,α,β)=αz(1–z)β. where  and  are complex numbers, and β is a positive integers number, the visualization method used in this work to generate fractals of the map and to inspect the relation between the value of β and the shape of the map, this visualization analysis showed also that, as the value of β increasing, as the number of humps in the function also increasing, and it demonstrate that is true also for the function’s first iteration , f2(x0)=f(f(x0)) and the second iteration , f3(x0)=f(f2(x0)), beside that , the visualization technique showed that the number of humps in that fractal is less than the ones in the second iteration of the original function ,the study of the critical points and their properties of the logistic map also discussed it, whereas finding the fixed point led to find the critical point of the function f, in addition , it haven proven for the set of all pointsα∈C and β∈N, the iteration function f(f(z) has an attractive fixed points, and belongs to the region specified by the disc |1–β(α–1)|<1. Also, The discussion of the Mandelbrot set of the function defined by the f(f(z)) examined in complex plans using the path principle, such that the path of the critical point z=z0 is restricted, finally, it has proven that the Mandelbrot set f(z,α,β) contains all the attractive fixed points and all the complex numbers  in which α≤(1/β+1) (1/β+1) and the region containing the attractive fixed points for f2(z,α,β) was identified
Devising matrix technology for forecasting the dynamics in the operation of a closed military logistics system
Authors: Ugol’nikov Alexander , Diachenko Volodymyr , Kliat Yurii , Kosenko Artem , Shelukhin Serhii
Published: December 2021

There is a tendency of intensive development of a new scientific area aimed at optimizing the processes of comprehensive ensuring the life of society and industrial processes of countries, specifically logistics, and its more important aspect, military logistics. This paper considers typical contradictions between the need and opportunities for additional development of the theory of processes involving this system. On the one hand, the military has important, dynamic, multifaceted processes for the comprehensive provision of their combat operations to analyze, which requires significant intensification of the development of methods and models for quantitative analysis of the effectiveness of the functioning of military logistics systems. On the other hand, there is now limited availability of theoretical developments and the practical application of the necessary, convenient, effective mathematical tools aimed at computerization of solving the problems of providing military scientific and technical problems in real time.
Matrix technology for forecasting the dynamics of functioning of closed systems of military logistics of various military purposes is proposed. Matrix calculus makes it possible to obtain intermediate and ultimate results in a compact form and carry out complex and cumbersome calculations using effective algorithms. A method to precisely solve the system of linear differential equations describing processes of arbitrary type has been proposed. The method is based on the use of the operational calculus by Laplace. The possibilities of the method and procedures of forecasting are illustrated by solving practical military tasks that arise during the functioning of military logistics systems of varying complexity. These tasks differ in configuration, different numbers of possible states, and state transitions
Interaction of surfactants with poloxamers 338 and its effect on some properties of cream base
Authors: Bezuglaya Elena , Lyapunov Nikolay , Lysokobylka Oleksii , Liapunov Oleksii , Klochkov Volodimir , Grygorova Hanna , Liapunova Anna
Published: December 2021

The aim. Study of the interaction of surfactants with poloxamer 338 (P338) and the effect of P338 on the properties of cream bases.

Materials and methods. Solutions of the surfactants and P338 as well as cream bases were under study. The average hydrodynamic diameter (Dh) and zeta potential (ζ‑potential) were determined by the light scattering intensity and electrophoretic mobility of micelles. The electron paramagnetic resonance (EPR) spectra of spin probes in micelles, solvents and bases were obtained; the type of spectrum, isotropic constant (AN), rotational correlation times (τ) and anisotropy parameter (ε) were determined. Liquids and cream bases were studied by capillary and rotational viscometry; the flow behaviour and yield stress (t0), dynamic and apparent viscosity (η) as well as the hysteresis (thixotropic) area (AH) were determined. The microstructure of the bases was examined by optical microscopy. The strength of adhesion (Sm) was assessed by the pull-off test, and the absorption of water was studied by dialysis.

Results. Under the impact of P338 the hydrodynamic diameters of micelles formed by cationic, anionic and nonionic surfactants decreased as well as the absolute values of their ζ‑potential became lower, but the microviscosity of the micelle nuclei increased. There was also a change in the structure of the aggregates of surfactant with fatty alcohols; EPR spectra, which were superpositions characteristic for the lateral phase separation, converted into triplets that indicated the uniform distribution of lipophilic probes in the surfactant phase. When the content of P338 increased to 17 %, the rheological parameters of the bases increased drastically, the flow behaviour and the microstructure changed. The bases had the consistency of cream within temperature range from 25 °C to 70 °C and completely restored their apparent viscosity, which had decreased under shear stress. P338 enhances the adhesive properties of the bases. Due to their microstructure, cream bases have a lower ability to absorb water compared to a solution and gel containing 17 % and 20 % P338, respectively.

Conclusions. The structure of surfactant micelles and aggregates of surfactants with fatty alcohols changed under impact of P338 due to the interaction of surfactants with P338. As a result of this interaction, at a sufficiently high concentration of P338, the microstructure and flow behaviour of bases changed, their rheological parameters, which remain high at temperatures from 25 °C to 70 °C, increased significantly, and water absorption parameters decreased. The bases with P338 were more adhesive
Synthesis and antibacterial activity of 3-arylaminomethyl-1-(2-oxo-2-arylethyl)-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a] azepin-1-ium bromides and aryl-(4-R1-phenyl-5,6,7,8-tetrahydro-2,2a,8a-triazacyclopenta[cd]azulen-1-ylmethyl)-amines
Authors: Demchenko Nataliya , Suvorova Zinaida , Fedchenkova Yuliia , Shpychak Tamara , Shpychak Oleh , Bobkova Ludmila , Demchenko Sergii
Published: December 2021

The aim of this work is to develop methods of synthesis of 3-arylaminomethyl-1-(2-oxo-2-arylethyl)-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-1-ium bromides and aryl-(4-R1-phenyl-5,6,7,8-tetrahydro-2,2a,8a-triazacyclopenta[cd]azulen-1-ylmethyl)-amines and to study their antimicrobial activity against strains of gram-positive and gram-negative bacteria as well as yeast fungi.

Materials and methods. 1Н NMR spectra were recorded on Bruker 400 spectrometer operating at frequency of 400 MHz. Antimicrobial activity of the compounds synthesized was evaluated by their minimum inhibitory concentration (MIC) values.

Results and discussion. The interaction of 3-arylaminomethyl-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepines with substituted phenacyl bromides produced novel 3-arylaminomethyl-1-(2-oxo-2-arylethyl)-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-1-ium bromides. The latter when refluxed in 10 % solution of NaOH gave aryl-(4-R1-phenyl-5,6,7,8-tetrahydro-2,2a,8a-triazacyclopenta[cd]azulen-1-ylmethyl)-amines. The study of antimicrobial activity of the compounds obtained allowed to find derivatives which are active against С. albicans and S. aureus strains. Among the compounds tested 3-[(41-bromophenylamino)-methyl]-1-[2-(4-methoxyphenyl)-2-oxoethyl]-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-1-ium bromide 5cd appeared to be more active than the reference drug Cefixime and displayed close antimicrobial activity as the antibiotic Linezolid.

Conclusions. It was found out that derivatives of 3-arylaminomethyl-1-(2-oxo-2-arylethyl)-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-1-ium bromides display broad spectrum of antimicrobial activity and are able to inhibit growth of both bacteria and fungi. S. aureus and C. albicans turned out to be the most sensitive strains to the compounds tested, MIC was in the range of 6.2-25.0 mg/mL. Gram-negative strains of microorganisms were less sensitive to the compounds evaluated and 5fа was the most active derivative displaying antimicrobial activity at the concentration of 50.0 mg/mL. Antimicrobial activity of triazoloazepinium bromide derivatives was similar to that one of Linezolid and Fluconazole reference drugs and more pronounced than the activity of Cefixime.

Hence, the data gathered evidence the feasibility of further study of the antimicrobial properties of the most active compounds in in vivo experiments aiming at assessment of the prospects for the creation of new effective and safe antimicrobial drugs based on them
Specific features of the right to associate in trade unions in the republic of Azerbaijan: theoretical and practical analysis
Authors: Ganberov Dashqin Majid oglu
Published: December 2021

The presented scientific article examines the features of the right to associate in trade unions in the Republic of Azerbaijan. The importance of the creation and activity of trade unions in the development of civil society is substantiated. It is noted, that on the basis of the right to association, various public organizations are being created in society. Within the framework of these organizations, members of the community ensure or defend their common interests. In order to determine the place of the right to associate in trade unions, it is important to analyze the level of its compatibility with other human rights and freedoms. As you know, the right to association is closely related to such social rights as the right to work and rest. Therefore, it was advisable to first determine the relationship of the right of association with these rights. The main goal of the modern state is to ensure the well-being and free development of the individual. Therefore, we can say that in the constitutions of such states, the right to work is separately enshrined. It is important to define the relationship of the right to association with other human rights. This will form a broader understanding of the nature of the right of association. Within the framework of this scientific article, the significant place of the right to association in trade unions is determined among constitutional human rights in the Republic of Azerbaijan. The right to association creates a real opportunity for the realization of other important social and political rights.
It is also noted, that the issue of the activity of trade unions is in the center of attention of researchers in many countries. Analyzing the characteristics of trade unions, it is noted, that they are important aspects of civil society. The article also examines the highlights of civil society. It is noted, that civil society consists mainly of public organizations. The level of development of civil society depends on the level of effective activity of public organizations. In this regard, trade unions occupy a special place. These and other issues are comprehensively considered in the presented scientific article.
Modeling the phased implementation of headhunting as a way to fill vacancies
Authors: Zhaldak Anna , Krasovska Mariia
Published: December 2021

The object of research is a set of stages of processes, used in the application of hunting as a method of closing vacancies. Such stages include: sources of search for candidates, ways of their interest formation, telephone conversation as an interview, negotiations and compilation of statistics with direct transfer of information to the director of the company.

In the course of the study, such general scientific and specific research methods as analysis and synthesis, induction, deduction, as well as methods of comparison, observation and a systematic approach, were used. These methods are to determine the results and dynamics when recruiting strategies are changed or when they are combined. With the help of comparison methods and a systematic approach, it was possible to determine the optimal strategy for closing the required number of vacancies in the future. Using the observation method, it was possible to consider the dynamics of indicators from each selection method separately or in different combinations with each other.

Among the complex methods, an analysis was used, which allowed to understand the dynamics of indicators and draw conclusions based on them on each of the options for implementing the methods. With the help of induction on the basis of a set of conclusions about each of the options separately, a generalized conclusion was made about the further rationality of the method of hunting as effective for businesses. The simulation allowed us to develop a strategy for the phased implementation of hunting based on direct search and understanding of its difference with the latter. With regard to theoretical methods, in the process of research the transition was made from the definitions and general provisions of the hunt to a specific consideration of the method in the enterprise and its direct implementation.

The result of all studies was:

– summary of theoretical aspects of headhunting as an effective method of attracting staff;

– effective change of dynamics of indicators at the enterprise during introduction of hunting and its combination with direct search;

– a developed strategy for the phased implementation of the hunt to increase the effectiveness of the method.
The development of theoretical, methodological and practical recommendations of the innovative development vectors of business process reengineering and strategic management of enterprises
Authors: Mandych Oleksandra , Mykytas Arkadii , Ustik Tetiana , Zaika Svitlana , Zaika Olena
Published: December 2021

The object of research is the reengineering of business processes, which is used to increase the effectiveness of strategic management of an enterprise, which will create a new type of environmental enterprise «bioalliance». One of the most problematic places is the possibility of conducting marketing research to ensure the competitiveness of enterprises. The paper used the hypothetical method in substantiating the theoretical and methodological principles of organization and functioning of bio-alliances as the basis of bio-economy for rural areas. The study used the economic-statistical method, ranking of economic zoning, correlation and regression and cluster analysis. These methods were used in the elaboration of directions, sources and strategies of development, components of system and process management, state support for the implementation of traditional and new socio-economic and environmental functions. Also in the course of the work, methods of ideal modelling, mathematical modelling and programming, abstract-logical and structural-logical, extrapolation, expert evaluations, surveys, observations, qualitative and quantitative, imaginary and social experiments were used. The results of the market analyses of agricultural companies showed the inexpediency of agricultural companies. Based on the research, modelling and re-engineering of business processes through the implementation of organisational, corporate, business and functional strategies was proposed. The new form of agrarian enterprises, proposed in the work, is «bioalliance», based on the principles of integration of tourism sphere, sphere of organic production and production of eco-commodities, as well as using bio-resources as the main source. Compared to similar known methodologies of strategic management, the proposed methodology provides enterprises with a high level of importance in the regions, increasing the efficiency of the use of the resources available in their ownership. And also to allocate new market segments in order to attract not only existing, but also potential consumers.
VIBRATION OF SANDWICH BEAMS REINFORCED BY CARBON NANOTUBES UNDER A MOVING LOAD
Authors: Tran Thom , Trinh Hien Thi , Nguyen Kien Dinh
Published: December 2021

This paper studies vibration of sandwich beams reinforced by carbon nanotubes (CNTs) under a moving point load. The core of the beams is homogeneous while their two faces are of carbon nanotube reinforced composite material. The effective properties of two face sheets are determined by extended rule of mixture.  A uniform distribution (UD) and four different types of functionally graded (FG) distributions, namely FG-X, FG-FG-V, FG-O, are considered. Based on a third-order shear deformation theory, a finite element formulation is derived and used to compute the vibration characteristics of the beams.
AS CONTRIBUIÇÕES DO PROGRAMA PFRH NA FORMAÇÃO DE UM TÉCNICO-CIDADÃO DO INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO RIO GRANDE DO NORTE
Authors: Fernandes Cristiane Do Nascimento , Silva Aline Dayane Nunes da , Sousa Hítalo Rhângelo de
Published: December 2021

O presente trabalho possui o objetivo de apresentar como o Programa Petrobras de Formação de Recursos Humanos (PFRH) contribui para a melhoria da formação do técnico-cidadão egresso do Técnico em Edificações do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte (IFRN)/Campus Mossoró, possibilitando assim, a ampliação não só de seus horizontes na área acadêmica como também no mercado de trabalho, além de agir como ferramenta facilitadora para o profissional que opta por seguir a carreira de Engenheiro Civil ou Arquiteto. Nele serão apresentadas as principais atividades desenvolvidas no programa, bem como abordadas as oportunidades proporcionadas por este.
Implant Placement in the Esthetic Zone: More Efficiency in Guided Surgery
Authors: Alevizakos Vasilios , Mitov Gergo , von See Constantin
Published: December 2021

The aim of this case report is to describe the combination of a surgical guide with a temporary restoration to streamline the implant process. A 54-year-old male patient presenting with partial edentulism underwent computer-aided template-guided implant placement for the replacement of the missing upper second right incisor. The presented technique was used during the surgical procedures; it introduced the integration of a surgical guide into the temporary fixed partial denture. Using computer-aided design, computer-aided manufacturing technology and virtual implant planning, a temporary-implantation fixed partial denture was constructed, and a guidance sleeve was implemented into it. The implant bed preparation was then performed using the bridge as a surgical guide. After osteotomy, the guidance sleeve within the bridge was sealed, and the bridge was temporarily incorporated for submerged healing of the implant. The use of a temporary restoration as a surgical guide seems to make the digital workflow of guided implant placement more efficient by achieving a representative clinical outcome.