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Purpose. The main objectives of scientific work is to study the technological parameters of the sodium hydroxide method of delignification of non-wood raw materials and production of fibrous first stuff for the manufacturing of packaging types of paper. Methodology. For the research, rapeseed stalks, sodium hydroxide cooking, anthraquinone catalyst were used. The brews were cooked in steel autoclaves, which were lowered into a glycerin bath. Standard methods for the determination of the quality indicators (yield and residual lignin content) of non-wood fiber first stuff were used. As a mathematical data processing method, the generalized reduced gradient method was used. Laboratory samples of castings of fibrous first stuff and paper were made on a LA-2 sheet-making apparatus, the mechanical parameters of the outturn sheet were determined according to the standard methods using appropriate instruments. Results. The expediency of using rapeseed stalks for processing of fibrous first stuff under alkaline conditions has been proven. It was found that the greatest influence on the delignification of raw materials has the raise of cooking temperature from 80 to 120 ° C and the use of the anthraquinone catalyst. It has been shown that the obtained rapeseed first stuff have sufficient paper-forming properties and are suitable for use in the production of MS 5B brand paper for the use in the production of fluting paper or board of B-3 grade. The scientific novelty of the work is due to the environmental friendliness of the agro-waste processing as an alternative raw material for the production of fibrous first stuff at low cooking temperatures. Using rapeseed stalks as an example, the influence of technological parameters on the quality indicators of first stuff was studied. Using the mathematical methods of the processing of experiment data, the optimal ratio of fibrous first stuff /waste paper at which the strength indicators of fluting paper or board will meet the standards was determined. Practical significance. Research results has shown the expediency of using oilseed wastes for processing of fibrous first stuff, with the aim of expanding the raw material base of cardboard and paper production. [ABSTRACT FROM AUTHOR]

Purpose: Development of models of estimations is qualities, that characterize a cloudiness and exposure of measure of influence of paper cloudiness on properties that characterize quality of the printed products with development of recommending polygraphists on the choice of paper for the estimation of descriptions of paper quality for polydiene productions. Methodology. A paper was investigational with the purpose of estimation of his cloudiness. The programmatic-algorithmic providing is worked out for the estimation of measure of vibrations of parameters that characterize quality of the printed products. Results. The worked out algorithm for the estimation of paper quality allows to conduct the analysis of his basic properties and determine his fitness to the use for printing. Scientific novelty. Worked out recommendations about the use of paper, that are characterized the quantitative estimations of properties: absorbancy, whiteness, contrast, for printing to it to the certain products: text editions, business graphics, highly artistic editions and advertisement products. Practical meaningfulness. Undertaken experimental studies educed the most effective parameter that characterizes a paper cloudiness, namely, forming index. The got models, and possible limits of oscillation of paper properties, underlay quantitative estimations of paper quality for her recommendation to the use for the certain printed products. [ABSTRACT FROM AUTHOR]

Purpose. An assessment of suitability and economic feasibility of use of annual plants which are grown in Ukraine, for receiving cellulose and providing the cellulose-and-paper enterprises with cheap and qualitative raw materials. Methods. In work for definition percentage contents of cellulose Vilshtetter-Shudl's method is used. Results. Percentage of cellulose, productivity and acreage of straw of rice, buckwheat, flax olive and technical hemp are analyzed. Scientific innovation. Import substitution of cellulose by means of her receiving from straw of annual plants which in enough are grown in the territory of Ukraine is for the first time proved. The practical significance. Revival of production of cellulose from annual plants will promote ensuring economic independence of Ukraine in production of the materials which contain cellulose and increase of employment of agricultural producers and workers of other industries. It will give the chance to completely provide the paper enterprises of Ukraine with own raw materials and to reduce dependence on import of our country by $209898 thousand. [ABSTRACT FROM AUTHOR]

Goal. The use of nanomaterials as a composite material to improve the efficiency of a protective coating for shielding against electromagnetic interference. Methodology. Samples were studied using equipment from Keycom Corp. (Japan) developed for measuring the shielding effect. Ultrasonic dispersion of nanomaterials was performed using a UZDNA1200T ultrasonic disperser. The resistivity of the composite coatings was measured using a ST2558B-F01 standardized 4-electrode cell. Results. The influence of various nanomaterials on the protective properties of thin carbon-polymer coatings has been established. The following nanomaterials have been investigated: boron oxide and carbide, iron oxide, carbon nanotubes, and graphene. The dependence of the resistivity of the coating and the shielding effect on the type of nanomaterial in the composite sample has been established. It has been experimentally proved that the ultrasonic dispersion can improve the shielding effect by 2.5 times. It has been found that graphene has a slight advantage compared to other carbon materials. Also, our results have been established that non-conductive materials such as nano-oxides of iron, boron, and boron carbide can be quite effective for creating radio-absorbing composite materials. Scientific novelty. The paper proposes a new approach to obtain thin protective coatings against electromagnetic radiation using nanomaterials such as boron carbide, boron oxide, iron oxide, some types of carbon nanotubes, and graphene. The paper proposes a unique algorithm for the ultrasonic dispersion of nanomaterials for the manufacture of composite materials. For the first time, an analysis of the shielding effect of coatings based on domestic materials using international standardized research methods has been carried out. Practical significance. Composite coatings can primarily be used to protect humans from electromagnetic radiation. The materials can be widely used to solve the problems of shielding premises, equipment, in the military, and medical industries. [ABSTRACT FROM AUTHOR]

Create a model for determining the coefficient of friction of textile materials to identify the main factors influencing the process of friction, taking into account the structural and mechanical properties of materials. Modeling of friction process in textile materials as a combination of adhesive and elastic phenomena. Roughness of solid bodies and the main parameters of roughness, such as the height of micro-irregularities, their pitch, sharpening, etc. described in many standards and scientific papers. However, the modeling of the friction process in such systems is very complicated due to the irregularity of distribution of microroughness. The analysis of literature data showed that the surface roughness of textile materials is an important and effective factor in predicting the tactile properties of products for various purposes. Estimation of surface roughness is usually carried out using subjective and objective methods, and the latter can be contact and non-contact. The paper develops a model for determining the coefficient of friction of textile materials to identify the main factors influencing the friction process, taking into account the structural and mechanical properties of materials. Friction force is presented as a combination of two main factors. The first is the elastic resistance to deformation, the second is the adhesive resistance to compression of the structural elements of the material. The main parameters influencing the coefficient of friction of textile fabrics - modulus of elasticity of structural elements, their geometrical parameters - surface density of textile material, linear density of structural elements are established. The obtained results allow to qualitatively predict the friction forces of a textile material with known parameters of its structural elements, as well as to normalize these parameters to create materials with specified friction indices. The obtained results make it possible to select the threads that form the textile material, according to the values of the modulus of elasticity, thickness, location density to ensure the minimum friction force. [ABSTRACT FROM AUTHOR]

Purpose. A monitoring of market of application of poliheksametylenhuanidin hydrochloride derivatives as antibacterial drug component and identify opportunities for its application in the fields of consumer industry. Methods. Review of the scientific sources about the general state of the subject. Results. In the paper was analyzed a number of scientific and patent literature for the last 15 years based on the Ukraine patent base and international base «Espacenet Patent search». There was defined advanced application domain of poliheksametylenhuanidin hydrochloride. Scientific novelty. In the paper were studied a patented scientific developments of the poliheksametylenhuanidin hydrochloride application in various fields of industry for the past 15 years. The practical significance. The analysis of the dynamics of patenting and areas of use during 2001- 2015 years poliheksametylenhuanidin hydrochloride. [ABSTRACT FROM AUTHOR]

Purpose. Development of improved methods of rational internal shape design of shoes on the basis of the formation of a database of 3D feet models using efficient software and advanced equipment. Methods. Methods of anthropometric studies offeet without contact using computer technology and special tools; mathematical methods ofprocessing the results of the experiment; graph-analytical methods of research and building of parameters of plantohram were used. Results. A database of 3D feet models and plantohram of the investigated groups of people were created. The algorithm of last designing in the medium Crispin LastMaker based on the created databases was shown. The contours of experimental lasts of two width (medium and wide) were calculated and designed on the basis of anthropometric research. Two models of shoe lasts (medium and wide width) for comfortable shoes were developed. Scientific novelty. The paper presents a rational way to design a shoe lasts in the medium of specialized software module Crispin LastMaker based on a mathematical model NATF obtained by the data processing of contactless research offeet of a homogeneous sample. Practical significance. The way to design an efficient internal form of shoes presented in the paper can be applied for industrial development of mass production of lasts of different styles for different groups ofpeople. [ABSTRACT FROM AUTHOR]

Purpose. In this article attention is focused on the problem of monitoring the level of quality of electricity with the use of control of consumption currents of various equipment. Methods. In this paper, an improved algorithm for controlling electricity quality indices, necessary for the normal operation of energy supplying organizations, is described. Results. The algorithm of modeling that helps to analyze the whole time interval of the quality control of the electric power is considered at the same intervals during which the vectors-lines of quality control are determined. Originality. Scientific novelty and theoretical value in this paper are studies of the slow fluctuations of network voltage. The practical significance. The applied value of the work lies in the fact that the accuracy of the information is monitored for the quality of electricity in cases of random processes in the network, which leads to violation of the frequency and stationary signals. The author proposed a new algorithm for calculation, which is based on the processing of this particular measurement information. [ABSTRACT FROM AUTHOR]

Purpose. We want to establish the influence of perturbations of an arbitrary physical nature on the motion of a dynamically symmetric rigid body, close to the Lagrange case. The problem is posed of investigating the behavior of the solution of system of equations of motion. Methodology. The averaging method is used for solving the problem. We apply an averaging procedure for system of the equations of motion of a rigid body under arbitrary initial conditions for perturbations admitting of averaging with respect to phase of the nutation angle. Findings. We consider a motion of a rigid body in Lagrange’s case under the action of a small torque which is constant in the body-connected axes and applied along the axis of symmetry. We examine a perturbed Lagrange motion, taking into account the torques acting on the rigid body from the external medium and small constant torque. The averaged system of equations of motion for slow variables is obtained. Numerical solutions of the averaged systems of equations are constructed. Originality. As a result of analysis and solution of the obtained equations, we establish some quantitative and qualitative specific features of the motions and provide a description of the evolution of the body motion. Such problems take place in the investigation of the motion of satellite about its center of mass, in dynamics of gyroscopes. Practical significance. The paper presents an approach to the dynamics of angular motions of rigid bodies subjected to perturbation torques of different physical nature. Evolution of these motions is analyzed by means of averaging method. The approach presented in the paper and the obtained results are applicable to the attitude dynamics of spacecraft. [ABSTRACT FROM AUTHOR]

Purpose. Research and solve the problems of custom-made shoes, taking into account the subjective feeling of consumer comfort. Methodology. Theoretical and analytical, marketing and experimental research. Findings. On the basis of the comparative analysis of results of anthropometric researches of feet and subjective feelings of comfort of footwear expediency of perfection of process of designing of footwear by the individual order with use of the universal model-transformer of footwear is proved. This paper analyzes modern materials, consumer choice factors influencing the formation of the range of innovations in the production of footwear by individual order. comfortable parameters based on the sensations of pressure on the customer's foot. The results of researches of individual sensations of pressure on the foot by footwear in a standing and walking condition are given. Originality. Based on a computer system with an Arduino Uno microcontroller and resistive force sensors FSR402, a device for determining the pressure between the foot and the inner surface of the shoe has been developed. The made model-transformer of footwear with use of installation of computer system on the basis of the Arduino Unо microcontroller gives the chance to measure level of subjective comfortable pressure of footwear on a foot of the customer. Practical value. Creating a comfortable and convenient shape of the product is one of the main stages of shoe production, the quality and careful implementation of which depends not only on the shape stability and comfort of shoes during operation, but also the appearance of the product. These studies make it possible to investigate and predict the provision of high quality, comfort and durability of shoes with uppers of modern classic and non-typical (python, crocodile) natural leather materials both in the layout and in the manufacture and operation of the product, as well as after repair and upgrade or improvement product design. The proposed model-transformer of shoes using a prototype computer system. [ABSTRACT FROM AUTHOR]

Purpose. Creation of mathematical models that allow determining the relationship between the design and technological parameters of the plate feeders and the energy consumption arising during their operation. Methodology. The work uses the classical mechanics principles, the contact interaction of solids theory and the mathematical modeling method. Findings. The paper considers the design and operation principle of a continuous plate feeder, defines its main design and technological parameters. The factors that create mechanical loads on the drive of the feeder plate are investigated. Mathematical models have been developed that make it possible to determine the moments of resistance and the power consumed by an electric motor during the equipment operation. The proposed models make it possible to determine the load on the drive in static and dynamic operation modes and take into account the design, technological parameters of the equipment and the bulk material physical and mechanical properties. The study results of the friction coefficients influence, the knife position and the force of its pressing on the plate surface, the plate rotation speed on the loads acting on the electric drive are presented. It has been found that the drive calculation is expedient for the mode in which the distance between the knife edge and the rotation axis of the plate is maximum, which corresponds to the operation at maximum load. It has been determined that a change in the feeder technological parameters (plate rotation speed, knife position) can lead to a change in the load on the electric drive by 86%, which must be taken into account when choosing a drive. Originality. Mathematical models of the continuous plate feeder operation have been developed, which make it possible to determine the relationship between the design and technological parameters of the plate feeders and energy consumption. Practical value. The results obtained make it possible to determine the load on the plate drive by the known design, technological parameters and bulk material physical and mechanical properties. [ABSTRACT FROM AUTHOR]

Purpose. The purpose of the work is to study the effect of styrene-acrylic polymer coatings on the change in physical, mechanical and hygienic properties of cotton fabric. Methodology. Aqueous dispersions of styrene-acrylic polymers (Lacrytex 640, Akratam AS 02.1, Tubifast AS 4010) were selected as the object of study. The processing of cotton fabric was carried out by the method of impregnation with varying a concentration of the studied polymers in finishing bath from 50 g/l to 150 g/l, followed by drying and heat setting. Standardized methods for studying the properties of textile materials were applied. The effect of polymer coatings on the physical and mechanical properties of cotton fabric was evaluated by the indicators of weight gain, thickness and rigidity. The hygienic properties of treated cotton fabric were characterized by hygroscopicity and breathability. Findings. The paper presents the results of a study of the dependence of physical, mechanical and hygienic properties of cotton fabric on the type and concentration of styrene-acrylic dispersions used. According to the results of the experiment, it was found that the acrylic copolymer Lacrytex 640 increases the elastic properties of treated fabric in the entire concentration range studied. It was determined that the greatest decrease in air permeability is typical for fabric samples coated on the basis of Akratam AS 02.1 dispersion. The hygroscopicity of cotton textile material with an increase in a concentration of the studied styrene-acrylic polymer dispersions from 50 g/l to 100 g/l decreases slightly (by 2%). Originality. It is proved that the styrene-acrylic copolymer Tubifast AS 4010 due to the formation of highly elastic film provides a soft handle and high hygienic properties of cotton fabric. Practical value. The obtained experimental results are of practical value in the development of new finishing compositions for textile materials. [ABSTRACT FROM AUTHOR]

Purpose. Determining the rational structure of the automatic control system of the motorcompressor, which provides minimal energy losses when switching on and going to a steady state mode of operation of a household refrigerator. Methodology. The methods of simulation modeling, comparative analysis, research of control systems and the main provisions of technical thermodynamics and the theory of automatic control are used in the work. Findings. The paper considers the principle of operation of the refrigeration unit of a household refrigerator, schematically shows its main elements and the relationship with the steam compression cycle. Simulation models of automatic control systems based on proportional-integral-differential controller, fuzzy and hybrid controllers have been developed. The proposed models allow to evaluate the quality of temperature control in the refrigeration compartment and to determine energy losses during transients. The results of computer simulation of transients in temperature control systems due to changes in the performance of the motor-compressor and the obtained values of power losses are presented. It is established that the smallest losses of the electric power at instant increase of heat inflows in refrigerating department occur at application of a fuzzy regulator. It is determined that the use of fuzzy controllers in automatic control systems reduces the duration of transients, the time of the first negotiation, the number of oscillations, but leads to static error and increases the maximum deviation from the set temperature in the refrigerator compartment. Originality. Simulation models of control systems of the motor-compressor of a household refrigerator for assessment of quality of regulation and definition of losses of the electric power during transient processes are developed. Practical value. The ways to increase the energy efficiency of household refrigerators through the introduction of control systems with fuzzy regulators are proposed. [ABSTRACT FROM AUTHOR]

Purpose. Studying the influence of continuous centrifugal mixers design features on their smoothing ability. Methodology. The methods used are discrete elements, mathematical modeling and regression analysis. Findings. The paper considers five continuous centrifugal mixers designs with conical and parabolic rotors. The mixers design features are determined, allowing to change their smoothing ability. Mathematical models of the bulk materials particles movement inside each mixer have been developed based on the discrete element method. The considered mixers reaction to a step change of the key component amount is investigated. The transients parameters are calculated and the particles average residence time in the mixer is determined. It is established that the introduction of turbulizers in the mixers design increases the particles kinetic energy, which leads to a decrease in their residence time in the mixer. Moreover, the absence of a turbulizer leads to a decrease in the mixing intensity. It was also found that the most effective way to increase the mixer smoothing ability is the introduction of additional rotors. In terms of the technological and design parameters combination, the use of mixers with a conical rotor and a turbulizer is the most effective from the point of view for increasing the smoothing ability. Originality. On the discrete element method basis, the bulk materials particles movement models in continuous centrifugal mixers of five designs have been developed. The influence of the mixers design features on their smoothing ability and average mixing time is determined. Practical value. The results obtained allow us to select the appropriate mixer design according to the specified requirements for smoothing ability. [ABSTRACT FROM AUTHOR]

Purpose. Study of physicochemical properties, chemical nature, and interaction with collagen of new fatliquoring preparations of various origins to identify among them effective reagents for resource-saving technologies focused on the production of leather products with predictable properties to reducing the harmful load on the environment. Methodology. To determine the basic physicochemical properties and chemical nature of fats, traditional and modern physicochemical methods of analysis (titrimetric, viscometric, infrared spectroscopy) were used, as well as visual assessment. Result. The paper presents the results of determining the chemical nature and physicochemical properties of new fatliquoring preparations - industrial products of natural and synthetic origin: Synthol EW321, synthesized based on emulsified synthetic fats; Synthol MC derived from phosphated synthetic fats; Sulphirol C, based on sulfitated fish oil, is resistant to electrolytes; semi-synthetic composition CMX-473, obtained on the basis of sulfonated and sulfated fats; synthetic electrolyte-resistant composition CMX-470, obtained on the basis of sodium salts of alkyl succinic acid and synthetic fats. IR-spectroscopic studies of the fibrous collagen preparation treated with these fatliquoring preparations were carried out. The nature and change in the optical density of the absorption bands of the functional groups of the protein depending on the type of fat used is determined. It was found that the studied reagents interact mainly with nitrogencontaining and hydroxyl groups of collagen. Scientific novelty. Peculiarities of interaction in the “collagen - chemical reagent” system in the presence of fatliquoring preparations of various origin intended for processing the leather are investigated. Practical significance. The results of the work will contribute to the expansion of the assortment and the justified use of effective chemical reagents in innovative technologies for the production of leather. [ABSTRACT FROM AUTHOR]

Purpose. The energy parameters determination of bulk materials mixing equipment. Methodology. The paper used methods of mathematical modeling, comparative analysis and research of electric drive. The particles motion study inside the mixer was performed on the theoretical mechanics laws basis. Findings. Design features of continuous and batch bulk materials mixers are considered. The operation principle and energy consumption are shown for a periodic action tape mixer with a productivity of 4000 kg / h. The continuous centrifugal mixer design and operation principle are presented. A particle motion mathematical model inside a continuous centrifugal mixer is presented. The mutual arrangement analysis of the bulk material particles inside the rotor was carried out and the conditions are determined under which a high-quality mixing process is ensured. Mathematical models are proposed to determine equipment design and technological parameters based on a given performance. Operation modes are determined in which the centrifugal mixer consumes the maximum energy amount. An algorithm for determining the continuous electric centrifugal mixer power is proposed. The comparative analysis results of the continuous and batch mixers energy consumption with the same performance are presented. A study of operating modes and factors affecting energy consumption was carried out. Originality. Mathematical models are obtained that allows determining the relationship between a continuous centrifugal mixer performance, its operating modes, and power consumption. Practical value. The obtained results permits to make an informed choice of equipment for mixing bulk materials. [ABSTRACT FROM AUTHOR]

Purpose. The study of the influence of tuck of one layer of a double tuck knit on the size, shape and disposition of the loops of the opposite layer is the goal of this paper. The overall picture of their interaction has been clarified and the obtained rules has been illustrated by new structure creation. Methodology. The common positions of the theory of knitting and the structure formation of the weft double knitted fabric, the mechanic of flexible thread, and also the methods of geometric models have been used for this research work. Results. The weft tuck knits have been divided according the alternation of the loops and the tucks in the course. Behind this feature, it was proposed to divide the tuck knitted structures into simple and patterned. In a simple tuck knit, the specified alternation is absent: its courses are formed exclusively tucks or exclusively loops. In the patterned knit, there is an alternation of loops and tucks. The mechanics features of an interaction between loops and tuck stitch in weft double knitted structures have been revealed. The effect of this interaction on the appearance of the knitted fabric surface is shown. The new double tuck knitted structure with improved surface optics has been developed. Scientific novelty. It is shown that it is possible to obtain structural effects in the one layer of loops based on patterned weft tuck double knitted structure with the placement of tucks in opposite layer of the structure. It is not only the zigzag loop wales (without shifting one needle bed relative to another), but others also, which are based on the unfolding of loops relative to the fabrics surface in addition to the inclination of loops as well as different size and shape of the loops. The knitted fabric of double tuck interloping with an alternating optical effect was developed at the patent level. Practical value. More reasonable design of double tuck interloping with tucks in one layer due to the interaction of their structural elements as well as an expansion of the pattern possibilities of tuck structures are the practical value of this research. [ABSTRACT FROM AUTHOR]

Purpose. The purpose of the work is to study the effect of polymer coatings on the rigidity of cotton knitted fabric. Methodology. As the object of the study aqueous dispersions of acrylic copolymers and aliphatic polyurethanes are used. Standardized methods for studying the indicators of physicomechanical properties of polymer films and textile materials are used. The formed polymer films are characterized by their appearance and an indicator of relative elongation at break. Mechanical properties of cotton knitted fabric with polymer coating are evaluated in terms of rigidity. Findings. The paper presents the results of the study of the physicomechanical properties of polymer films of acrylic and urethane nature. The dependence of the elasticity of the formed films on the functional groups of the polymer and their relative position is shown. According to the results of the experiment, it was established that the rigidity of the finished knitted fabric depends primarily on the chemical structure of the polymer binder. It was determined that the studied acrylic copolymer with the adhesion promoter and aliphatic polyurethanes due to the high degree of cross-linking enhance the elastic properties of the polymerfiber composite formed. The necessity of choosing a polymer with high elasticity to form a coating on a knitted fabric was established. Originality. It is proved that the proposed styrene-acrylic copolymer due to the formation of a highly elastic film allows us to obtain a soft handle of cotton knitted fabric. Practical value. The results of the experiment are of practical importance for the development of new finishing compositions for textile materials. [ABSTRACT FROM AUTHOR]

Purpose. The goal of the work was to study the physico-chemical properties of styrene-acrylic polymer film to form a coating on a textile material. Methodology. A water dispersion of a styrene-acrylic copolymer was used as an object of study. Standardized methods for studying the indicators of the physicochemical properties of polymer films and physical properties of textile materials have been applied. The study of the structural parameters of an individual polymer film was carried out using the sol-gel method. The physical properties of the studied polymer material were evaluated according to the results of the resistance of the film to hydrolytic degradation at different processing temperatures and the effects of soap and soda solution. The quality of cotton knitted fabric with the formed polymer coating was evaluated by the change in hygroscopicity and breathability. Findings. The paper presents the results of a study of the structural and physical properties of polymer film based on the styrene-acrylic copolymer. The optimal polymer composition was determined to create a coating on the textile material and the concentration of the proposed composition was established, at which the hygienic properties of the cotton knitted fabric did not deteriorate. Originality. It is proved that the proposed polymer composition allows you to create a resistant coating on cotton knitted fabric and at the same time keeps hygroscopicity and breathability of knitted сloth. Practical value. The results of the experiment are of practical importance for the development of new finishing compositions for textile materials. [ABSTRACT FROM AUTHOR]

Purpose. The goal of the work is to determine the dependence of lightfastness of colours obtained by reactive dyes on the interlacing of cotton knitted fabrics. Methodology. The study was carried out using cotton knitted fabrics of various interlacing: plain, rib knitted fabric 1×1 and pique. Samples of knitted fabric were previously prepared by the combined method of washing and peroxide bleaching. Dyeing was carried out by reactive dyes brand Bezaktiv Cosmos periodically. The insolation of the dyed samples was carried out on a device with a mercury-tungsten lamp. The lightfastness of the samples was evaluated according to BS 1006 UK/TN standard by determining color differences at regular intervals using a colorimeter. Findings. The paper presents the results of a study of the effect of interlacing of cotton knitted fabric on the resistance of colours obtained by reactive dyes to light. It is established that the surface structure of knitted fabric affects the fading of colours with reactive dyes to varying degrees. It has been proven that a knitted fabric with a uniform smooth surface loses colour less under the action of light due to its ability to evenly distribute energy and reflect incident light compared to knitted fabrics with an uneven and rough surface. Based on the data obtained, the mechanism of the effect of light on knitted fabrics of various interlacing is given. Originality. The influence of the interlacing of cotton knitted fabric on the lightfastness of colours obtained by reactive dyes was studied. Practical value. According to the results of the study, interlacing of cotton knitted fabric were determined, which provide colours with reactive dyes with high resistance to light exposure, as well as interlacing, which require light-shielding treatment under the same conditions. [ABSTRACT FROM AUTHOR]

Purpose. Develop a mathematical model of an abstract network packet filter with the ability to classify Peer-to-Peer interactions. Methodology. Used methods of mathematical modeling, simulation modeling for the method of group method of data handling and methods of mathematical statistics. Verification of effectiveness of the proposed models and methods is performed by comparing various metrics of the classifier of peer-to-peer interaction. The combination of different approaches in the synthesis of network filter rules allows us to abstract from the transport layer protocols, the rules are described as a binary tree that is searched for peer-to-peer interaction properties. Findings. The paper proposes a mathematical model of an abstract network packet filter, which allows the use of a flexible accounting policy in networks of general purpose. Under the accounting term we meant the possibility of creating restrictions for a number of users who create the largest volumes of information flows, thereby affecting other participants in the network segment. The establishment of an effective procedure to combat this phenomenon will improve the quality of the services provided and minimizes the possibility of exceeding the level of allowed bandwidth. The use of an abstract network filter can be combined with a system for monitoring proper work of a multiservice network, thereby providing a systematic approach in identifying problems and violations of access policies. Scientific originality. The proposed model by combination of the reviewed methods allow us to identify peer-to-peer interaction with increased accuracy. Particular importance is vital as the process of creating classification filter rules, permits to use external tools that provide interaction signatures of applications. Practical value. The results of theoretical studies were implemented as a separate software module of the packet classification system for automatically determining the parameters of interaction between applications in a peer-to-peer network. The learning process of the classification network is carried out automatically, which results in complete autonomy of the system. [ABSTRACT FROM AUTHOR]

Purpose. Development of theoretical bases for managing the processes of generation, accumulation and consumption of electricity in the microenergy system with a deterministic daily electricity consumption schedule with several sources based on one criterion - the conditional dynamic tariff. Methodology. Given the discrete and combinatorial nature of mathematical problems for systems of this kind, the principles of structuring, decomposition, as well as methods of discrete optimization, set theory, matrix algebra, are applied. Results. The paper substantiates the main provisions of the method of mathematical modelling of the functioning of the micro-energy system with traditional and renewable sources and its optimization based on the conditional dynamic tariff using spectral analysis. It is shown that the creation of electrical systems based on mutually integrated distributed sources of electricity (traditional and renewable) requires the use of automated control systems taking into account the topology, basic and mixed modes of operation, control of generation and consumption of electricity. Originality. For the first time, it was proposed to use a mathematical model of the functioning of a micro grid with mutually integrated distributed sources of electricity and computer control systems with regard to topology, control of generation and consumption of electricity based on spectral analysis, which made it possible to optimize such electricity complexes according to one criterion - conditional dynamic tariff. Practical significance. The obtained results create prerequisites for solving problems related to mathematical modelling of the operation of complex multicomponent systems, the definition of procedures for analyzing their effectiveness and optimality, the improvement of control algorithms, the creation of appropriate software. [ABSTRACT FROM AUTHOR]

Purpose. Investigate and analyze topical issues of reforming technical regulation clothing and personal protective equipment in Ukraine and internationally. Methodology. The paper used methods standardization process. Findings. This paper investigated the development of technical regulation of products including special purpose clothing and personal protective equipment. Deals with the requirements for the quality of materials and supplies clothing. Originality. The structural elements of the communication system of technical regulation clothing and personal protective equipment in Ukraine. Practical value. The level of harmonization of standards in the manufacture of PPE and found that GOST is much more than ISO EN. [ABSTRACT FROM AUTHOR]

Purpose. Research of the current state of the footwear products standardization within the Ukrainian technical regulation system. Methodology. Special methods of the standardization process research are applied in the paper. Findings. This paper examines the current state of standardization of footwear products in Ukraine for Technical Regulation System. The main problem areas are determined. Originality. Market of the footwear products is analyzed and the growth of the imported products is determined. Practical value. The products technical regulation system is significantly outdated and needs reformation - among 46 existing standards of ISO 18 standards and one technical regulation are to be improved. [ABSTRACT FROM AUTHOR]

Purpose. To study the effect of active functional groups of cross-linking agents on the physical properties of starch polymer films. Methodology. Standardized methods for studying the indicators of physical properties of polymer films have been applied. Findings. The paper presents the results of the study of the effect of crosslinking agents of different chemical structure on the physicomechanical properties, the influence of atmospheric moisture and the resistance to wet treatments of starch polymer films. An improvement in studied parameters of the films with the use of L-tartaric acid was established. Originality. It has been proved that the use of L-tartaric acid as a crosslinking agent makes it possible to improve the physical properties of polymer films based on starch. Practical value. The obtained experimental results are of practical importance for the development of new environmentally friendly polymer materials. [ABSTRACT FROM AUTHOR]

Purpose of the research is to substantiate the feasibility of rotary type aerators usage at biological water treatment plants with recirculation. Methodology. The main advantages and disadvantages of alternative aeration systems in recirculating aquaculture systems are determined on the basis of the devices technical characteristics and observations results. Determination of the rotor type aerator performance on dissolved oxygen was carried out under conditions of a laboratory experiment using rotary-type aeration. Findings. The paper substantiates the efficiency of rotary aerators for ensuring the proper oxygen regime for water treatment. The scheme of aerator connection the block of biological water treatment facilities was proposed and the rational operational parameters at the coefficient of recirculation at the farm were determined within the limits of 90-97%. Originality. The efficiency of rotor-type aeration systems for oxygen saturation of reversible water has been proved. Practical value. The usage of a rotary aerator will reduce the energy consumption and the heat loss compared to pneumatic aeration systems. [ABSTRACT FROM AUTHOR]

Purpose. Investigation of the wetting ability of surfactants solutions of various classes in relation to a grey cotton knitted fabric. Methodology. The wetting ability of surfactants solutions of different concentrations was determined by the Draves immersion method. Findings. The paper presents the results of the study of the wetting ability of surfactants solutions of various classes in relation to grey cotton knitted fabric. Originality. For the first time, the dependence of the wetting time of the samples of grey cotton knitted fabric on the concentration of surfactants of various classes was established. Practical value. Surfactants and their concentrations are established, which ensure the maximum rapid wetting of knitwear. [ABSTRACT FROM AUTHOR]

Purpose. To develop a method for automatically determining the parameters of a rectangular grid for designing rational schemes for cutting sheet materials. Methodology. The methods of analytical geometry and applied mathematics are used to determine the parameters of a rectangular lattice for the design of rational schemes for cutting sheet materials. Findings. In the paper, a method was proposed for automatically determining the parameters of a rectangular lattice for designing rational schemes for cutting sheet materials. Originality. A method is proposed for automatic determination of the parameters of a rectangular lattice, which is more effective when designing rational schemes for cutting sheet materials. Practical value. The results of theoretical studies were implemented in the software module for automatic determination of the parameters of a rectangular lattice, which allowed to develop a software product for the automatic design of rational schemes for cutting sheet materials. The developed software product can be used in the light industry to automatically design rational schemes for cutting sheet materials on parts of footwear and other industries when cutting sheet materials on flat geometric objects. [ABSTRACT FROM AUTHOR]

Purpose. Analysis of the structural characteristics of the national costume, its ornamentation, colors and shapes for subsequent transformation of the main components, to create a modern collection. Methodology. In the work it is used literary-comparative analysis, which allows to consider features of formation of a suit, to investigate the nature of its occurrence and role in a holistic manner. To identify the main methods of suit formation is applied the system-structural analysis, which involves a degree of abstraction in the analysis of the shape of the suit. In the course of work it is used the investigation of the shape at different levels: material-decorative, structural, coloristic, or plastic; the techniques of harmonization of the composition of the costume are allocated for each level. Findings. The conducted researches give the possibility of adaptation of the iconic components of traditional garments form the vector of transformation of national costume in modern way. Originality. The paper identifies the major structural characteristics of the national outfit formation that is advisable to transform during creating the actual image in the fashion industry and the development of collections of fashion costume in the segment of mass market. Practical value. Carried out information provides the opportunity to choose some of the components of the national costume of the studied countries, that play a significant role in the design of the collection and transmit the symbolism of the Scandinavian traditions in costume design. Also, on the basis of detailed analysis of primary source the sketch project for a collection was created. [ABSTRACT FROM AUTHOR]

Purpose. Analysis of existing methods and instruments for measuring the thermophysical properties of shoe materials and its indicators to determine the appropriateness of using one or another technique depending on the research objectives. Methodology. Analytical review and systematization of scientific and technical information about methods and instruments for studying the the thermophysical properties of shoe materials. Results. The paper presents an analysis of modern methods and instruments for studying thermophysical properties - their features, advantages and disadvantages are noted. Scientific novelty. A detailed analysis of existing methods and instruments for determining the thermophysical properties of shoe materials has been carried out, and the main directions and prospects of research have been systematized. Practical value. The systematization of methods, methods and instruments for studying the thermophysical properties of shoe materials makes it possible to quickly orientate in a large number of methods. And also determine the appropriateness of their use depending on the tasks assigned. [ABSTRACT FROM AUTHOR]

Purpose. To develop a method for the automatic design of rational schemes for the dense placement of planar geometric objects in a rectangular region of specified dimensions. Methodology. The methods of analytical geometry and applied mathematics used to design and correct rational schemes for the dense placement of planar geometric objects in a rectangular region. Findings. In the paper, a method was proposed for the automatic design of rational schemes for the dense placement of planar geometric objects in a rectangular region of specified dimensions. Originality. A method is proposed for automatic design of rational schemes for the dense placement of planar geometric objects in a rectangular region of specified dimensions that is more efficient than existing ones. Practical value. The results of theoretical studies were implemented in a software module for the automatic design of rational schemes for the dense placement of planar geometric objects in a rectangular region of specified dimensions. [ABSTRACT FROM AUTHOR]

Purpose. Preparation ofpulp from linen fibers suitable for the manufacture ofproducts for technical purposes. Methods. To obtain pulp suitable for making technical articles used neutral sulfite method. Results. As a result of systematic experimental studies found optimal parameters and modes with pulping flax fiber and defined limit concentration of the working fluid. Scientific innovation. Experimental samples of cellulose fibers from flax neutral sulfite method suitable for the manufacture of technical products. The practical significance. On the basis of theoretical and experimental studies in this paper we propose a method for producing cellulose fibers from flax. Due to the technological features of the process, cellulose derived from indicators of quality that rivals the quality of the pulp indicators derived from hardwood trees. [ABSTRACT FROM AUTHOR]

Purpose. Derivation of the calculated ratios for energy inputs and capacity of energy storage (АE) and estimation of economic efficiency prospects from the use of parallel active filters (PAF) with АE on the example of a three-phase four-wire power supply system for hostel No. 7 KNUTD. Methodology. The economic and energy efficiency of the electrotechnical complex "three-phase four-wire power supply system - PAF with АБ" is estimated by the ratio ofpayment for electricity through a two-tariff system and energy losses in the power cable. The analytical conditions of the expediency of applying the PAF with АБ on the indicator of saving payment for electricity are investigated. Findings. The paper substantiates the concept of constructing a three-phase power supply system with the PAF and АБ for the possibility of redistributing the daily energy consumption schedule for the interval of the preferential tariff and demonstrating the prospective economic efficiency indicators using the example of a three-phase four-wire power supply system for hostel No. 7 KNUTD. Originality. New analytical dependences of the relative daily payment and increase of the heat load of the transmission lines on the value of the energy storage capacity are redistributed during the redistribution of the daily energy consumption schedule for the interval of the preferential tariff. Practical value. These dependencies can be used to optimize the relationship between capital and operating costs when developing a business plan for upgrading the power supply system of a hostel or any other educational facility. [ABSTRACT FROM AUTHOR]

Purpose. Existing approaches of the vocations calculation are not correct in all enterprises. The aim of the paper is the legal rationale for the creation of a reserve vacations in the Ukraine. Methodology. Well-known methods are used: legal research and cause - effect relationships. Findings. This paper presents the results of research regulatory support an allowance holidays. We consider the feasibility of establishing a reserve vacations for businesses. Originality. Regulatory rationale for the creation of a reserve for selling enterprises of Ukraine and the impact on your holiday allowance of financial and tax accounting are studied. Practical value. The methodology for payment of vacations is proposed for an enterprise provisioning. The necessity of creating a pool of leaves for Ukrainian companies, mentioned effects of non-compliance with the law. [ABSTRACT FROM AUTHOR]

Purpose. Investigated features issues of automation of systems and modules in the production of footwear and components. Development technological process of manufacturing preventive insoles using automated systems and modules. Methodology. The results of theoretical research were conducted on a number of theoretical attempts to automate the process of manufacturing preventive insoles by introducing elements of automation in technological process to prove the practical significance of work and the replacement of manual labor on stream, thereby achieving improved quality of products in this segment, the ability to mass-produced products to extend the range, improving manufacturing technology and also with a view to reduce the cost of the product that makes it available to the consumer. Findings. The paper presents the technological process of mass production preventive insoles with replacement manual labor on stream and developed a schematic block diagram of the automated manufacturing process of products for special purposes. Originality. For the first time developed a technological process mass production preventive insoles with active influence on the reflex points of the foot with elements of automation stream. Practical value. Applying a systematic approach studies the issue of an automation manufacturing process preventive insoles provide improved the process of their production by automating the process. [ABSTRACT FROM AUTHOR]

Purpose. Determine the technological features of garments manufacturing of made from opticalfiber materials taking into account their mechanical properties. Methodology. Standardized methods for studying the mechanical property and experimental methods for studying the technological processing of the garments manufacture were use. Findings. The paper describes the results of mechanical properties of opticalfiber materials and proposed recommendations for garments technological processing of such materials. Originality. The analysis of the mechanical properties of opticalfiber materials is carried out and the process parameters of processing sewing goods are proposed. Practical value. The results of the mechanical properties of opticalfiber materials provide the possible to quickly select technological parameters for the processing of garments [ABSTRACT FROM AUTHOR]

Purpose. Analysis of existing methods for measuring the vapor permeability of textile and its indicators to determine the appropriateness of using one or another technique depending on the research objectives. Methodology. Analytical review and systematization of scientific and technical information about methods for studying vapor permeability. Findings. The paper presents an analysis of standardized methods for studying vapor permeability - their features, advantages and disadvantages are noted. The analysis covers the techniques that are presented in ASTM E96; ISO 15496; BS 7209; JIS L1099; ISO 2528; DSTU 3672; ISO 11092; ASTM 1868. Originality. A detailed analysis of existing methods for determining vapor permeability of textiles has been carried out, and the main directions and prospects of research have been systematized. Practical value. The systematization of methods for studying vapor permeability of textiles makes it possible to quickly orientate in a large number of methods and indicators to determine the appropriateness of using one or another technique depending on the research tasks. [ABSTRACT FROM AUTHOR]

Purpose. Investigated features issues of automation of systems and modules in the production of footwear and components. Development technological process of manufacturing preventive insoles using automated systems and modules. Methodology. The results of theoretical research were conducted on a number of theoretical attempts to automate the process of manufacturing preventive insoles by introducing elements of automation in technological process to prove the practical significance of work and the replacement of manual labor on stream, thereby achieving improved quality of products in this segment, the ability to mass-produced products to extend the range, improving manufacturing technology and also with a view to reduce the cost of the product that makes it available to the consumer. Findings. The paper presents the technological process of mass production preventive insoles with replacement manual labor on stream and developed a schematic block diagram of the automated manufacturing process ofproducts for special purposes. Originality. For the first time developed a technological process mass production preventive insoles with active influence on the reflex points of the foot with elements of automation stream. Practical value. Applying a systematic approach studies the issue of an automation manufacturing process preventive insoles provide improved the process of their production by automating the process. [ABSTRACT FROM AUTHOR]

Purpose. Determine the technological features of garments manufacturing of made from opticalfiber materials taking into account their mechanical properties. Methodology. Standardized methods for studying the mechanical property and experimental methods for studying the technological processing of the garments manufacture were use. Findings. The paper describes the results of mechanical properties of opticalfiber materials and proposed recommendations for garments technological processing of such materials. Originality. The analysis of the mechanical properties of opticalfiber materials is carried out and the process parameters of processing sewing goods are proposed. Practical value. The results of the mechanical properties of opticalfiber materials provide the possible to quickly select technological parameters for the processing of garments [ABSTRACT FROM AUTHOR]

Purpose. Analysis of existing methods for measuring the vapor permeability of textile and its indicators to determine the appropriateness of using one or another technique depending on the research objectives. Methodology. Analytical review and systematization of scientific and technical information about methods for studying vapor permeability. Findings. The paper presents an analysis of standardized methods for studying vapor permeability - their features, advantages and disadvantages are noted. The analysis covers the techniques that are presented in ASTM E96; ISO 15496; BS 7209; JIS L1099; ISO 2528; DSTU 3672; ISO 11092; ASTM 1868. Originality. A detailed analysis of existing methods for determining vapor permeability of textiles has been carried out, and the main directions and prospects of research have been systematized. Practical value. The systematization of methods for studying vapor permeability of textiles makes it possible to quickly orientate in a large number of methods and indicators to determine the appropriateness of using one or another technique depending on the research tasks. [ABSTRACT FROM AUTHOR]

Purpose. Identifying characteristics create kinetic typography. Methodology. Used system of general scientific and empirical research methods: analysis and synthesis, generalization and systematization, which allowed the analysis of the creation of typography in motion. Findings. During the study kinetic typography, set a good use of basic knowledge in videotypohrafiky created. Scientific novelty. The paper analyzed and studied the sequence of creation and features to transfer emotions and supply some of the author's ideas to his audience through animated text. Practical significance. The practical significance of the work lies in the fact that the results can be used as material for training and improving the theoretical base of students majoring fotovideodizayn, and can be used in the preparation of individual projects video. [ABSTRACT FROM AUTHOR]

Purpose. The adhesion of the active material to the current collector, as well as resistance of electrochemical capacitors was investigated in the paper. Methods. An adhesion was evaluated by peeling test, an resistance was measured using impedance technique. Findings. Different Al current collectors have been tested and compared in order to improve adhesion of the active material and contact resistance. Using the Al current collectors with different morphology and extended surface gave possibility to improve adhesion and to reduce the contact resistance between the active layer and Al foil. The current work describes also some new approaches for low-cost electrode fabrication process using the water-based binder system based on Styrene-Butadiene Rubber (SBR) and Carboxymethyl cellulose (CMC). Originality. A new environmentally friendly and low-cost method for manufacturing the electrodes of electrochemical capacitors has been proposed. The method has shown the possibilities to produce electrodes with a high adhesion of the active layer to the Al current collector of some morphology and also achieving the low contact resistance. Practical value. The results allow us to improve the electrical characteristics of electrochemical capacitors and the technology of its production. [ABSTRACT FROM AUTHOR]

Purpose. Analysis of protective textiles development on the background of scientific progress and technological achievements of textile industry is the main arm of this research. Methodology. Analysis and systematization of scientific information in the field of protective textiles have been conducted. Results. The article provides an analytical review of scientific papers in the field of protective textiles, the main areas of research have been categorized and the basic requirements for a variety of protective materials have been systematized Scientific novelty. The detailed classification of protective textiles has been carried out and the main research directions in the field of protective textile have been systematized. In the past decade, the production of protective textile is growing faster compared to the other segments of technical textiles. Practical value. The classification of the protective textile materials that contained in this review and systematization of scientific and framework on the development and the use of protective textile materials enable quick orientation in a wide range of protective textiles and contribute to the definition of perspective research directions in this field. [ABSTRACT FROM AUTHOR]

Purposel. Development of a new method of formation of chain stitch and recommendations regarding the determination of parameters of working bodies and mechanisms of the sewing machine. Methodology. When developing a new method used a general heuristic method using the principle of "extra element". If defined parameters working body uses a common design technique of sewing machines chain stitch, the basis of which rests similarity theory to determine the optimal values of geometrical parameters of working bodies, based on the magnitude of their turns as the basis for designing appropriate mechanisms. Also used analytical methods for determining the geometric parameters of complex surfaces with regard kinematic and dynamic interaction of threads with these surfaces. Findings. The paper proposed a new manufacturing process for flat sewing machine chain stitch, which has several advantages over similar known process. The technique of defining the basic geometrical parameters of working body - the expander and are depending on rational parameters for determining the mechanisms of sewing machine. Originality. Definition of rational geometric parameters of the looper operating element of the conditions of its interaction with the needle, the laws of their movements and technological parameters of two-thread chain stitch flat. Practical value. The proposed method stitch formation improves economic performance flat sewing machines chain stitch, which can be used to connect or processing edges knitted materials, and proposed depending on the basis for designing sewing machines of this type. [ABSTRACT FROM AUTHOR]

Goal. The aim of this paper is to study the basic aspects of the formation of energy security, the factors affecting its software at the enterprise level. Methods. Method of research involves the use of methods of analysis and synthesis, comparison, generalization of the method, system approach. Results. We investigated the nature and importance of energy security as a condition of providing energy state to implement repeatable processes in the national economy and security state of the energy sector of Ukraine. Scientific novelty. Practical recommendations for the definition of the factors and the main directions of energy security. Practical significance. The results will help to address policy issues in the field of energy security of the enterprise. [ABSTRACT FROM AUTHOR]

Purpose. The paper analyzes the advantages of direct surface water cooling systems (DSWCS) and describes the possible values of energy savings using examples of typical objects that use this technology. Methodology. The latest trends in the use of DSWCS were analyzed. The characteristics of the existing object were used to specify the power used to pump water from surface water to a heat exchanger and this value is compared to the cooling capacity of the DSWCS. Findings. The calculations showed that the power used to pump water from the surface water to a heat exchanger for the reviewed object is very insignificant in relation to the total value of cooling capacities. Originality. It was shown the necessity of clarifying the factors that affect the efficiency of such systems and the need to create a DSWCS design methodology for assessing the benefits of using such systems in Ukraine. Practical value. The data can be used to justify the use of DSWCS. [ABSTRACT FROM AUTHOR]

Purpose. Power factor improvement and the corresponding values of the efficiency index through shunt active filter for three-phase power system. Methodology. Energy efficiency of the electrical engineering complex "shunt active filter Cables for Power Systems" is estimated by ratio of Energy loss from inverters to power cables. It's proved the analytical usefulness of shunt active power filter in terms of energy efficiency. Results. This paper surely contains solutions to extremal problems for parameters that determine the output performance of three-phase power system in the Nonsinusoidal Operation Modes: the full power of a ratio four-resistances of the power cable determination; power loss minimization and maximizing power factor. Scientific novelty. For the first time the method for upgrades to improve efficiency through the use of shunt active filtering for energy efficiency estimation of three-phase four-wire system was proposed and it can improve the load power factor with account of filter's intrinsic losses. Practical significance. The new analytical dependence applicability of shunt active filter for increasing energy efficiency of four-wire major power system was obtained. These correlation functions are capable to substantiate the selection of hardware components and switching frequency of power inverters for shunt active filters at design. [ABSTRACT FROM AUTHOR]

Purpose. The paper deals with the construction of perspective images in the paintings of the famous Renaissance and Baroque artists. The importance of the works of art analysis in the studying of the perspective and shadows as well as the place of perspective in the overall image theory is defined.. Methodology. The systematic and comparative analysis of the landscape paintings by the artists of the Renaissance and the Baroque period. Findings. Analysis of the Renaissance and Baroque works of art makes it possible to trace the development of aerial perspective as the thinking of artists of the time. The stages of the development of the perspective as the science are analyzed. The approaches to the analysis of the perspective in the image and the role of this aspect in the formation of the future professional designer. Originality. It was determined that a comparative analysis of the works of art from different periods is a required part of practical exercises in studying the perspective and shadows, as well as for the understanding of the general laws in the development of the geometric perspective. Practical value. The results can be used during the "Perspective and shadow" study by the design students and for the identification of the period of the works of art.. [ABSTRACT FROM AUTHOR]

Purpose. The paper analyzes the data obtained by the field research for 6 days of the heating season. The data shows the operation time of a fan used in a dynamic storage heater and how many times the fan is turned on per day and the obtained information is used for the evaluation of the fan power consumption. Methodology. The dynamic storage heater is placed in the room. There is the heat transfer from the device outer surfaces and from its airways. The fan is used to blow air through airways. Two temperature sensors control the fan operation in order to keep the room temperature in the allowable range. Findings. The field research shows the data of the fan operation time for 6 days. It was found that the fan was turned on from 23 to 40 times per day and the operation time varied from 2.59…4.42 hours per day. The shown data demonstrates only a special case, not a general case. Originality. The result of the field research shows how dynamic storage heaters function. The data of the operation time and the number of times when a fan is turned on give some additional evaluation of the technical aspects of the use of fan assisted storage heaters. Practical value. These data can be used as a justification for using a fan assisted storage heater. [ABSTRACT FROM AUTHOR]

Purpose. Justification of a criteria of efficiency of local micro energy systems. Methods. Micro energy system is considered as a single unit controlled by the managed system with intelligent electricity sources that can be integrated into a centralized grid. Analysis of approaches evaluate the effectiveness of the local "smart" microgrid shall be based on the discrete and combinatorial nature of mathematical models of such systems by applying the principles of structuring, decomposition and pipelining, the network graph theory. Results. The research justified the concept and principles of conditional dynamic pricing as the integral index of the current cost of electricity microgrid with multiple sources prior to distribution between consumption of a local object based on the current cost of electricity in the chosen time interval considering the load curve at the current time. Originality. For the first time to assess the effectiveness of local microgrid with traditional and renewable sources suggested the use of the conditional dynamic pricing as the integral index of the current value of the power systems based on the load level at the current time. The practical significance. This paper proposes a method of forming the control algorithms of the energy balance of micro-networks using an intelligent control system based on the daily forecasting generating of independent sources, the use of storage capacity for optimal power consumption for the local object. [ABSTRACT FROM AUTHOR]