bluuebunny/crossref_metadata_2025 huggingface dataset:
Calculation of the sizes of the overflow part of ingots from steels 40ХЛ and Х12МЛ at application of gas-dynamic influence and electroslag heating
Authors: Selivorstov V. , Selivorstova T. , Zelenskyi K. , Ivanova L.
Published: August 2022

The results of analytical research on the use of methods for calculating the size of inflows of cylindrical casts from steels 40ХЛ and Х12МЛ weighing 200 - 16000 kg and a diameter of 0.25 - 0.7 m, hardening in metal form (mold) in electroslag heating of the melt and creating atmospheric gas pressure in the overflow part. Schemes of construction of the corresponding device and realization of technology are resulted. The use of the refrigerator design in the form of a metal housing with an insert of refractory material, graphite electrodes and a flux insert, which works on the principle of floating filling insert in the combined technology of gas-dynamic impact and electroslag heating, allows more efficient use of melt casting ingot by keeping the metal in a liquid state throughout the curing time of the main mass of the casting (ingot), thereby reducing the amount of melt required to feed the shrinkage and, accordingly, the mass of the overflow. This is especially true for alloy products that contain high-cost base components and / or alloys. It is also an urgent task to be able to determine the size of a particular filling when using technology for castings of different weights and sizes in the most convenient way without the implementation of cumbersome calculation schemes. It is shown that the peculiarity of determining the size of overflows of castings made using combined technology is to take into account changes in the size of the insert of refractory material (especially wall thickness), which occupies a certain share of the overflow part of the cast or ingot, which, in turn, will change the size of the filling. Calculations and nomograms for determining the height of the filling by its diameter and the mass of casts at the ratios of the diameters of the casting and filling 0.6, 0.65 and 0.7.
Models and procedures for classification and forecasting of nondeterministic processes according to chaotic dynamics parameters
Authors: Skalozub V. , Horiachkin V. , Klimenko I. , Shapoval D.
Published: August 2022

The article investigates the processes of classification, modeling and short-term prediction of nondeterministic time sequences, which are represented by antipersistent time series (ATS). The subject of analysis - procedures for classification and forecasting the pa-rameters of such models. The object of research is the processes of modeling and analysis of parameters of nondeterministic time series of ATS with a uniform step. The aim of the work is to increase the efficiency and accuracy of methods and algorithms for classification, modeling and forecasting of ATS. Models and methods of fractal analysis are used to study the properties of ATS, on the basis of which the categories of processes of numerical series are established. With the help of aggregation of ATS levels correct mathematical models of classification of nondeterministic time sequences are developed, and also algorithmic and software means of their realization are formed. Examples of models of numerical series obtained using the aggregation procedure presented in the study are given. It is established that the most detailed and stable is the classification of ATS based on data aggregation schemes without level crossing. The comparative analysis of numerical efficiency of algorithms of classification of ATS is carried out and the task of formation of procedures of interpolation and short-term forecasting of ATS is realized. An instrumental software environment is presented, which provides a correct study of algorithms for modeling and classification of antipersistent time series. Recommendations on the procedures for modeling ATS classification algorithms are of practical importance.
Method of own forms for determination of separate bands
Authors: Morozov A.
Published: August 2022

The problem of determining the separate bands of the phosphor photoluminescence spectrum described by the Gaussian function is solved by the method of decomposition into its own forms. This allows you to calculate two parameters of each band: amplitude and variance. An example is the photoluminescence spectrum of a ZnS:Mn single crystal. It consists of five separate bands. Two systems of fifth-order equations linear for one parameter of each band are obtained. This parameter is generalized and is equal to the product of the amplitude and the root of the variance. The coefficients of these systems depend on the second parameter. This non-linear parameter is related to variance. In order to simplify the two systems, the problem is solved in several stages. Based on the analysis of literary sources, the two largest bands are selected. In addition, the origin of coordinates is well chosen. This allows us to simplify both systems and completely determine the parameters of each of the largest bands from the systems of second-order equations. As a result of these simplifications, the order of the two systems and the parameters of the other three bands are reduced. Thus, the problem is reduced to solving a system of the second and third order nonlinear equations.
Micro-X-ray spectral determination of the chipboard dust samples elemental composition
Authors: Projdak Y. , Kamkina L. , Mianovska Y.
Published: August 2022

The paper determines the composition of dust from electrostatic precipitators of EAF gas cleaners during long-term storage in dumps in order to obtain information on classifying dust as hazardous waste. Determination of the heavy metals content in waste was performed by atomic absorption flame spectrophotometry on an AAS-1N spectrophotometer. The content of the amount total iron and the determination of its various oxidation states was carried out by redox titration with potassium bichromate in an acidic medium. A comprehensive metallo-graphic study of dust samples included macroanalysis (at x16 magnification), microanalysis of the structure of the end section of pellets from fresh dust from EAF electrostatic precipitators using optical microscopy (x 50, x 500). A detailed analysis of the microstructure of the selected samples was carried out using a JSM-6490 scanning electron microscope in the mode of secondary elastically scattered electrons. The X-ray spectral analysis of the selected samples was carried out using energy and wave spectrometers attached to a JSM-6490 scanning electron microscope. Chemical analysis of dust samples showed that there are no significant differences in the content of total iron in the presented dust samples, although there is some decrease in the depth of the dump. A stronger decrease in the transition from the surface of the dump to the depth is noted by the content of Fe3O4. All samples are magnetic, which indicates a significant content of magnetic nitrous oxide-iron oxide in the dust, most likely in an unbound state. The presence of zinc and lead impurities in the melting charge, evaporating at the operating temperatures of the furnace, leads to their oxidation by the air flow, as a result of which they can be in the final dust both in the form of free oxides and in the form of composite structures with iron oxides. It has been established that the results of the chemical analysis of electrostatic precipitator dust samples, their qualitative composition and the content of toxic heavy metals, in general (according to the average value of 10 determinations) correspond to the given technical conditions of the enterprise for this type of waste, the excess was obtained in terms of the zinc content in all considered iron-containing wastes. A distinctive feature of heavy metals present in the waste is extremely low mobility in buffer media and practical insolubility in water.
INVESTIGATION OF THE PARAMETERS INFLUENCE OF A CYLINDRICAL INDUCTOR WITH TWO-LAYER INWALL ON ITS TEMPERATURE
Authors: Dukhnevich К.L. , Кravets О.V. , Spirintseva O.V.
Published: August 2022

The thermal state of a cylindrical inductor with a two-layer inwall was investigated: the inwall temperature of the inductor for 12 pairs of heat-insulating materials of the inwall layers was calculated, and the influence of changes in the thicknesses of inner and outer inwall layers for fireclay-asbestos pair on the inwall temperature.
Formation of a set of informative features when deciding problems of predicting the durability of structures
Authors: Korotka L.I.
Published: August 2022

The paper proposes a method for extracting informative features for the training sample in the problems of predicting the durability of corroding structures. The work aims to analyze and evaluate the informative features that improve the quality of the data and to structure them. Kendall`s method is used to determine the value of each trait. It is proposed to use the training sample to work with a neural network or to build a fuzzy knowledge base only after the formation of a set of information attributes on their value.
Search engines for video
Authors: Linevych O.O. , Likhouzova T.А.
Published: August 2022

The thermal state of a cylindrical inductor with a two-layer inwall was investigated: the inwall temperature of the inductor for 12 pairs of heat-insulating materials of the inwall layers was calculated, and the influence of changes in the thicknesses of inner and outer inwall layers for fireclay-asbestos pair on the inwall temperature.
Program source codes conversion system
Authors: Sokol I. , Volkovskyi O.
Published: August 2022

The growing volume of technologies, the end of actively used development tools support, outdated API etc., entails the need of program codes conversion. In IT companies and not only, often begged the question of deprecated software support, which customers continue to use, or translation of current software to actual technologies. It is more rational for programmers to use the conversion and save most of code base, than rewriting all software by hand, even if manual adjustment is needed. At this moment, there are few high-quality code conversion systems. Largely, conversion systems work well only with similar programming languages. The task of program codes conversion is a deep and complex topic. Programmers are trying to improve translation technologies and facing with many challenges. This article discusses the basic principles of building a system for program codes conversion and some features of its practical implementation.
On one approach to the development of a simulator of the movement of an autonomous vehicle with training
Authors: Zaytsev V. , Bulatetskyi Ye.
Published: August 2022

The article deals with the use of simulators for controlling the movement of an autono-mous vehicle and development of a new simulator. The approach to creating a simulator of motion of a vehicle in the C# programming language is described. In the development for the implementation of simulation scenes used Unity 3D multi-platform tool is used in the devel-opment. The simulation uses direct propagation neural network that does not have a clear number of input level neurons, having only a constant output level, consisting of two neurons: the first one is responsible for acceleration, the second one is responsible for the ability of the car to turn left or to the right. Also, there is no clearly defined number of hidden levels and neurons located there. All this data in the simulation can be determined by the user. The input to the neural network values received from lasers. The lasers measure the distances to obstacles and feed the values to the input of the neural network. A sigmoidal activation function is implemented. To train the neural network an augmented learning algorithm is used, namely, a genetic algorithm applied to each vehicle, starting with the creation of each vehicle's own list of genes. In the network of each vehicle the number of genes is equal to the number of weights. For the first generation, the weights are set randomly. For the simulation, a generalized neural network with a large number of settings, with it is possible to change its structure: it is possible to change the number input level neurons that depend on the number of lasers at vehicle, their range, the height at which they detect interference, field of their visibility; you can change the number of hidden levels and the number of neurons that will be located there; control the mutation process used in the genetic algorithm; define the value of the mutation and the range of variation at which values can be varied; turn on and off the self-preservation, change vehicle speed, acceleration, set the maximum and minimum speed, edit the parameters responsible for the rotation of the car and its smoothness. Implementation of the project is provided on GitHub. The simulator can be downloaded by any developer from GitHub and can be used to implement and test various neural network training algorithms, including work of your own design.
Modeling strategic priorities for thermal modernization of industrial buildings
Authors: Nazarenko O. , Nazarenko I. , Ishchenko O. , Besarab T. , Kulik M.
Published: August 2022

The technology for generating positive ideas is based on human experience, the need to improve the technological process or reduce the operating costs of production and the basic amount of industrial waste. The work examines the audit of industrial buildings and an over-view of advanced technologies for the production of building materials from waste. Current measurements of energy consumption, exceeding the limits and increasing the cost of re-sources require the formation of scientific and technological accents for the development of mixture combinations in the formation of building materials. In the course of the experiments, the thermal properties of polystyrene, ecowool, expanded polystyrene, mineral wool, expanded clay, ecowool with expanded clay were studied. Experiences show that standard insulation technologies do not work productively in the case of industrial buildings with minimal funding. An integrated technology for obtaining a by-product from secondary resources is needed. Waste audit at the enterprise showed the possibility of using primary building materials for the generation of by-products. The available equipment with minimal modifications makes it possible to obtain a new product during the endothermic process of expanded clay swelling. The pressing of cotton wool with a lightweight expanded clay structure allows obtaining sheet materials of the required density up to 1 by 1 m in size. The flexibility of the obtained material allows it to be cut with a cutting tool to the required volume. The possibility of obtaining materials of different densities is convenient for use in any enterprise, when issuing recommendations for increasing the thermal resistance of the shell. The conducted studies of the thermal resistance of the obtained material show the convenience of manufacturing a product to comply with the sanitary conditions of an industrial enterprise. The experiments were carried out according to standard methods. The need to transfer buildings of industrial enterprises to an energy-saving heating mode is caused by the need to reduce the operating costs of enterprises.
Design and analysis of circuit technique of inverter converter for induction heating
Authors: Zimoglyad A. , Guda A. , Kalinina N. , Balakin V. , Larionov H.
Published: August 2022

For a research laboratory, the versatility and flexibility of equipment is usually one of the most important criteria. For these reasons, the task was to develop and manufacture a prototype of a laboratory inverter, capable to drive powerfull laboratory devices, like an induction heather, magnetic stress device, and so on. Among the required power leved, the wide frequency operationg range and durability are the inavoidable requirements. The article describes the schematics and design of a laboratory inverter designed for induction heating and melting. The inverter can be easily integrated into the equipment of laboratory installations (for example, intended to melt of metal in a vacuum post). It can also be used autonomously to harden and melt small samples of metals and alloys, including the color metals. The inverter power inverter is adjustable from 0 to 2 kWt, the operating frequency range from 50 kHz to 200 kHz, power supply from 220 V. A half-bridge topology was chosen as the core of the inverter construction. Was developed an undervoltage protection unit, overheat protection, a control circuit on a separate board, a voltage generator were assembled, and water cooling to the copper tubes of the oscillatory circuit was assembled. To test the efficiency of the inverter and the possibility of its operation on the load in the form of a circuit of the induction heater through the pump transformer, a series of experiments on metal heating was performed. To achieve this resuls, metal sample was placed inside the inductor coil, and the frequency was lowered from 200 kHz to 140 kHz. The power consumption from the network reached 1.5 kW. During these tests, no essentail overheating of the electornic componets was detected. The inverter has proved its efficiency during numerios tests. Due to the protection against overcurrent, overheating, low supply voltage in the control circuit, it is well suited for laboratory research on melting and heating of metal. The usage of modern element base, together with circuit solutions, allowed us to achieve the necessary parameters in terms of efficiency, operating frequency range and power.
Possibilities of reducing electricity consumption by ore-thermal furnace
Authors: Kachan Yu. , Mishchenko V.
Published: August 2022

Analysis of recent research and publications. The spread of electric current in the ore bath has been the subject of study for many years. Many scientists have performed mathematical modeling of electric fields of three-phase ore thermal furnaces, and also developed a method for conducting theoretical research using conformal mappings to determine the physical fields in the ore thermal melting furnace. Known mathematical models of energy distribution in the volume of the bath of the latter are based on the method of secondary sources, which has a number of disadvantages, in particular, complex integral equations that affect the volume of computational operations. Qualitatively, the electric field of the furnace is sufficiently illuminated, but the available information is not enough to accurately calculate the power, electrical transformations and temperatures at each point in the volume of the bath. The aim of the study. The above-mentioned mathematical models of the operation of the ore-thermal furnace describe only one process that takes place in it. Therefore, in complex modeling it is necessary to take into account all the processes and the relationship between them to obtain complete information about the power consumption of the furnace, the formation of melt and slag throughout the smelting of ferroalloys. Presentation of the main research material. The elements of the dynamic algorithmic model of operation of a round three-electrode ore thermal furnace are considered, which takes into account the specifics of electrical, thermal and chemical processes that are directly interconnected in the production of ferroalloys. Shows the complete generalized structure of such a model. The main purpose of its creation is the ability to control and influence the technological process to reduce the specific cost of electricity per unit of finished product. The algorithm is divided into basic blocks: input of initial parameters; division of the inner region of the furnace into elementary volumes (for calculations in them); determination of current flow paths; calculation of energy released in elementary volumes due to the passage of current through the charge; calculation of the temperature field of the bath; determination of the moment of self-ignition of coke; recalculation of the temperature field of the bath due to heat transfer processes; determining the amount of melt formed; calculation of the amount of charge that must be poured into the bath; output parameters of the furnace. The universality of this algorithm is the ability to interrupt the cycle of calculations under various conditions, such as: the value of the amount of electricity consumed (with time); the value of the formed melt (with time); and other. Conclusions. The model allows to stop melting and start draining of ferroalloys according to the predicted amount of formed melt, which in turn can reduce the melting time and the amount of electric energy consumed.
Modeling of the influence of the chemical composition and structure on the mechanical properties of alloy rolled products
Authors: Lutsenko V. , Golubenko T. , Chuiko I. , Lutsenko O.
Published: August 2022

Actual for modern engineering is the study of the influence of chemical composition and processing on the structure and mechanical properties during development of the new brands of the steel. The purpose of the study was the modeling of the role of the chemical composition for the formation of the mechanical properties and structure in determining the effect of the cooling rate on the austenitization temperatures of the 31CrMoV9 steel. It is known that the complex of mechanical properties of metal products depends on the number of alloying elements and the mode of heat treatment. Using the mathematical and physicochemical modeling for 31CrMoV9 steel were made dependent on the change in the mechanical properties of the alloy rolled products (σв, δ5) from the structural condition index (d). It is determined that for guaranteed compliance with the requirements of tensile strength (900-1000 MPa) and specific elongation (> 11%) the number of the alloying elements shall be corresponds to the following content: 2,46...2,62 % Сr, 0,2...0,24 % Mo and 0,17...0,19 % V. Received data are allow to forecast the rational mechanical properties of the heat treated rolled products depending on the change in the content of chromium, molybdenum and vanadium. Metallographic studies allowed to establish the influence of heat treatment parameters on the structure of the studied alloy steel. It is established that heating to the temperature А3+200°С and further continuous cooling with speeds > 0,8ºС/s prevents the formation of the pearlite structure, which during further heat treatment (annealing) promotes the passage of structural transformations (coagulation) in the steel. To prevent curvature of the metal, it is desirable to have cooling the rolled steel 31CrMoV9 at a speed of 0,8…2ºC/s. Recommended cooling rates allow to obtain a more acceptable structure for further processing with the required mechanical properties. Together with prognostication of the level of the mechanical properties for the certain chemical composition, these recommendations allow the rational use of the chemical elements and guaranteed compliance with the requirements of the European regulatory documentation EN10085:2001.
Stabilization of the radial clear in the pumping assembly of the supply pump improvement by improving the structure of the slide bearing bushing
Authors: Melyantsov P. , Losikov O. , Nazarets V. , Sidorenko V.
Published: August 2022

The performance of axial-piston hydraulic feed pumps depends on the technical condition of the coupling parts that form a radial gap in the pumping unit of the pump. The dynamics of its growth is largely due to the technical condition of parts that form a radial gap in the plain bearings of the pumping pump assembly: «drive shaft pin - bushing hole», «driven axle pin - bushing hole». Stabilization of a radial backlash in sliding bearings is possible by carrying out constructive improvement of the plug which will provide reduction of a contact angle of surfaces of friction of details in couplings. The aim of the work is to ensure the stabilization of the radial clearance in the pumping unit of the feed pump by developing constructive measures to reduce wear of parts in its plain bearings. From the analysis of the operating conditions of the plain bearing it is established that the reduction of the friction force is possible due to the reduction of the contour pressures and the increase of the area of liquid friction between the surfaces of the parts. Providing such conditions is possible by using combined bushings, which consist of working and guide bushings, between which is installed an elastic damping element in the spherical channels of which are additional compensation springs, which are placed in a circle through . The reduction of the friction force when using a combined sleeve with compensating springs is explained by the formation of the deformation component of the friction force at the vertices of the microroughness of the sleeve surface, as the spring elasticity is 4% less than the modulus of elasticity of the sleeve material. The lower value of the moment of friction forces at the end of the test is due to the constant absorption of vibration loads by the elastic damping element, the elasticity of which is 2% less than the modulus of elasticity of the sleeve material, which also reduces the contact area. The total less wear of the experimental friction pair is due to the reduction of the contact area of the shaft with the sleeve in the area of maximum values of friction forces.
Modeling of blast furnace melt processes when changing the program of charging the burden
Authors: Merkulov O. , Semenov Yu. , Dzhigota M.
Published: August 2022

The publication presents the results of a predictive assessment of the modeling of processes and final indicators of blast-furnace smelting with a change in the charge loading program for a blast furnace with a volume of 1719 m3, followed by comparison with the actual results obtained. Modeling was carried out using a mathematical model of blast-furnace smelting, which, in contrast to obtaining balance indicators, makes it possible to obtain knowledge about the mechanism of the processes due to which changes occur, including the uneven distribution of charge materials on the top of the blast furnace. The change in the distribution of the ore load was expressed in a decrease by 15-20% of the ore load in the radial ring zones 1-3, where their values in the first period did not exceed 1.0 and an increase in the ore load in the most loaded radial ring zones 5-10 by 2-10%. This led to the displacement of gas isotherms in the central and intermediate radial annular zones upwards, and only in the peripheral zone downwards. At the same time, the temperature difference between the gas and the charge also increased, especially in the upper part, and the softening and melting zone shifted upwards in most of the radial annular zones, except for the peripheral one - 10. The resulting value of heat transfer in the charge column is the gas temperature at the outlet of the charge column. The nature of its change along the radius of the blast furnace is the same for the values calculated by the model and those measured in the blast furnace and indicates an increase in the temperature of the flue gases when using the program for loading the second period. Similar curves for the degree of use of CO gas, obtained by calculation according to the model. From the obtained results, it follows that in lightly loaded radial annular zones, heating to a given temperature occurs at higher horizons, and in heavily loaded ones, at the lowest-high-temperature horizons, requiring heat transfer intensification and measures to improve energy utilization. Without additional measures, a decrease in the use of heat and a corresponding increase in the temperature of the exhaust gases with a reduction in the degree of use of the reducing ability of gases is inevitable, which is obtained as a result of calculations.
Working-Class People's Expressions in Modern Tamil Poetry
Authors: Mythreanbu
Published: August 2022

Although literary works are the products of the imagination of individual writers, they are considered to be the voices of the times. It is appropriate to consider literature as the essence of a long history and as a necessary document for social change, rather than as a dry reflection of social currents. In this way, in the contemporary literary environment, more attention is paid to poetry, lyrical content, expressive ability, social vision, and new ideas than to other types of literature. Free verse, which in recent times has been identified as modern poetry, has developed in the form of singing new verses. Accordingly, these poems have the characteristic of absorbing the modern trends of recent times. In general, the free verse that appeared in the late nineteenth century was renaissance-oriented and addressed the morals of the human race living in a particular place. In addition, they looked closely at the effects of economic and social changes and acted in such a way as to express their effects immediately through depiction. Thus, the modern poems of recent periods depict the various types of changes that occur in society every day. Under it, the ideologies expressed in recent modern poetry appear as sources of 'confessions' and sources of life for the living people. Accordingly, the expressions of modern poetry have focused on important socio-political and economic issues such as humanity, life problems, contradictions, crises, imbalances, effects of contemporary trends, reactions etc. Accordingly, modern literature diverges from the classical language of Tamil grammatical traditional poetry that has existed so far. Individual disability, mental nature, experience impressions, anger at restrictions, resistance, unity for love, failure thoughts, likes and dislikes about politics, and slander can all be found in modern poems. In this way, this review examines the pains of the basic people's lives, the inequality positions, the economic problems of the peasants, and the inhuman misery between the relations from the poems of the recent period.
The Characteristics and Lifestyle of the Bharathava People in the Novel "Alaivaik Karai"
Authors: G Anitha
Published: August 2022

According to the title of lower class people's history in literary works, Mrs. Rajam Krishnan's fictional painting "Alaivaik Karayil" is a biographical reference to the people of the fishery and Bharathavar clans, the lower class built along the coast at the border of the town. Sangam literature mentions Bharathavas as a division of Neithal (sea and land around the sea) people in Tamil Nadu. Living along the coast, the livelihood of the fishermen is based on the resources of the sea. The community of fishermen is a race that has not left the lap of the ocean mother who provides them life without settling in cities in search of livelihood. Toiling in the deep sea, enduring the vagaries of nature, drifting ashore, getting caught in nets, not being paid according to labour—there is no sure income for the labourer who is toiling in the sea. The scales of sharks are called thuvi. It is more valuable than fish. There is a compulsion to pay the thuvi and other things as a compulsory tax to the temple of Matha. Without trying to eliminate ignorance, addiction to drugs and sensuality, middleman troubles, the dominance of churches, resorting to drugs to forget life's dissatisfactions and disappointments, resistance to modern mechanised boats and the mechanised boat industry, etc. are considered to be the fuel of their greed. The status of referring to the power boat as a "Visapadaku", religious conversion, the pious fishermen who say "Mary is merciful," the religious fishermen, the inability to give dowry for the virgins, and conversion to Hinduism to escape the tax-extorting domination of the religious priests are implied. The fact that the author uses the same speech dialect after studying their speech reflects her fascinating experience. It has been shown that there are separate Tamil words that are not in our colloquial language today and that there is a separate case language that is a mixture of Portuguese, Sinhala, and Malayalam languages. The essence of this review article "Alaiyoram" is to explore the precious matters like pearls buried in the novelty in various situations.
Tensile rheological properties of melts of dispersion-filled polymer composites based on polyethylene containing glass microbeads
Authors: PHAM Q. D. , SURIKOV P. V.
Published: August 2022

The paper presents the results of the study of rheological properties of melts of dispersion-filled polymer materials based on polyethylene containing glass microbeads manifested under tensile stress in a thermostating bath. The dependences of tensile multiplicity on loading time are plotted, models describing the processes of stretching and subsequent relaxation are presented, the value of relative viscosity of composite materials is obtained.
Polymerization of poorly water-soluble monomers in the presence of ethoxylated polyalkylene glycol Laprol 6003, an ethoxylated product of alcoholate copolymerization of propylene oxide with glycerol
Authors: GRITSKOVA I. A. , KOVTUN I. D. , GOMZYAK V. I. , MILUSHKOVA E. V. , GUSEV S. A. , KLYUZHIN E. S. , KHADDAZH M. , ROMANENKO G. A. , LEVACHEV S. M. , BELENKO E. V. , CHVALUN S. N.
Published: August 2022

The paper shows the similarity of kinetic regularities of vinyl monomers polymerization in the presence of Laprol 6003, regardless of the degree of solubility of the monomers in water. It is assumed that this feature of polymerization is due to the same mechanism of formation of polymer-monomer particles (PMP) – from monomer microdroplets. The interfacial adsorption layer of PMPs, the main site of polymerization, is formed from a surfactant adsorbed from the bulk of the monomer phase and a polymer formed in the adsorption layer upon initiation of polymerization. The formation of complex structures in the interfacial adsorption layer of particles, the incompatibility of the surfactant and the resulting polymer, and high viscosity cause the formation of a strong interfacial layer that ensures the stability of polymer suspensions from the early stages of polymerization.
Physicomechanical properties of metal-polymer systems based on polypropylene
Authors: KAKHRAMANOV N. T. , ALLAHVERDIYEVA KH. V.
Published: August 2022

The influence of the concentration of nanoparticles of non-ferrous metals (aluminum and copper) on such physicomechanical properties of polypropylene as ultimate tensile stress, tensile yield strength, bending strength, elongation at break, heat resistance, melt flow rate is considered. The optimal concentrations of copper and aluminum nanoparticles have been determined, at which relatively high values of strength indicators are achieved. The influence of sulfuric vulcanization on the regularity of changes in strength properties has been studied.
Polybenzoxazine binders for polymeric composite materials
Authors: SIROTIN I. S. , PETRAKOVA V. V. , KIREEV V. V.
Published: August 2022

Phosphazene-containing benzoxazine compounds based on diamines of various structures were obtained as a result of the work performed. The resulting compounds were characterized by 1H NMR spectroscopy, the thermal and rheological properties of benzoxazines based on diamines were studied, and data of flammability were presented. The effect of the structure of the initial diamine on the properties of the resulting monomer and polymer has been studied. The curing kinetics of compositions of benzoxazines with different contents of phosphorus-containing flame retardant catalysts based on hexachlorocyclotriphosphazene and m-toluidine was studied. The synthesized monomers and the resulting compositions of benzoxazines with flame retardant catalysts can be used as heat and fire resistant binders for polymer composite materials, as well as hardeners for epoxy resins.
Innovation committees, a tool for business sustainability
Authors: DE LA PEÑA-ANGUIANO Fernando , ARAMBARRI Jon , DE LA TORRE-DÍEZ Isabel , DE CASTRO-LOZANO Carlos
Published: August 2022

The Innovation Committees in companies manage to obtain significant results in the creation of intellectual property intangibles, which increases their income, reduces costs and maintains a project portfolio of new products on the market, in an agile manner and aligned with market needs. Against with open and global competition, it is important for companies to specialize and innovate to give sustainability to their project, prosper and grow. To achieve this, we propose an Innovation Committee model as a differentiator to improve business qualities and skills. Thus, manage innovation and develop competitiveness with a new model of organization of an Innovation Committee. Our hypothesis is that if the company has an Innovation Committee, its life expectancy will increase and it will adapt to global conditions, guaranteeing its existence in the future. The phenomenon of the Innovation Committees had no impact or momentum because they were not defined in their organization, functions and roles, and they were not correlated to innovation management models. The research presented is exploratory. The results obtained and the beta tests of the Innovation Committee have made it possible to obtain significant results for future studies. An Innovation Committee is pertinent and effective, since from the beginning it provides skills, competencies and capacities to manage competitiveness and sustainable growth.
Block programming to develop interactive activities in the analysis of passive filters using an RC circuit for distance classes
Authors: GONZÁLEZ-GALINDO Edgar Alfredo , CARRILLO-MORENO Aldo Omar , DOMÍNGUEZ-ROMERO Francisco Javier , PÉREZ-GARCÍA Jorge
Published: August 2022

Block programming was developed for interactive activities in the analysis of a passive low pass filter using a RC circuit for distance classes. On a breadboard, was integrated an Arduino development board, a potentiometer and a visual indicator (a light emitting diode LED). The development of the programming was carried out using the software LabVIEW to generate an interactive front panel that allows us to manipulate and visualize the calculations, the graphic expressions and at the same time vary at least one passive element. A graphical interface was obtained that allows iterations and immediate calculations for the missing parameters to see the behavior of the filter and also generates a display for the mathematical expression and its Bode plot, the resistance allows us vary the values and make a sweep to locate the angular frequency and activate the light emitting diode connected on the development board. In the programming a web camera was implemented to visualize the circuit in real time at the moment of manipulating a graphical interface.
Correlation between school performance and writing skills in students entering higher education
Authors: TORRES-URBINA Arlet , ONTIVEROS-VARGAS Angel Adrian , SOTO-RIVERA Jesus Abraham , SALAS-NAME Sagrario Lizeth
Published: August 2022

Written language is an organized and voluntary activity, conscious analysis of the sounds that form. As a communication system for which there is structured a context of use and certain formal combinatorial principles. Objective: To identify the writing ability level at new students to higher education using the Brief Neuropsychological Battery NEUROPSI in Spanish. Methodology: The research is quantitative, exploratory, cross-sectional, descriptive, correlational and comparative. It is a non-probabilistic sample by convenience with 38 freshmen in City of Durango, Mexico. Contribution: There is a normal level of writing in 84.21% of college freshmen (32 students), 10.53% with moderate deficit (4 cases) and with severe deficit 5.26% (2 cases). Finally, 15.79% of all cases (6) resulted deficient according to the values of Spanish Brief Neuropsychological Battery.
Design and prototyping of an automated didactic medicine dispenser
Authors: ECHANDI-PACHECO Rodolfo
Published: August 2022

This project focuses on the principles of Arduino UNO, which is an open-source electronic platform that helps build a wide variety of projects without having expert programming knowledge. It is known that medicine, treatments and medications in general are constantly evolving thanks to the advancement of technology and science; therefore, this project has focused on that area through the construction of a medical dispenser that can contribute to the experience of the employees and the user. Each user will have an identification document with their predefined treatments and medications so that they can personally purchase all these products by simply placing their card near the dispenser, it will read the information and return the product. In short, having an Arduino as the brain of this project can facilitate any day-to-day task and help create devices that can regulate any dispensing process, reduce costs, and help people get their product without waiting too many hours in a hospital, primary reason for the construction of this project.
Generalización del Modelado de Cadencias de Tecleo con Contextos Finitos para su Utilización en Ataques de Presentación y Canal Lateral
Authors:   , González Nahuel
Published: August 2022

Las cadencias de tecleo configuran un atributo biométrico comportamental que puede ser utilizado como segundo factor de autenticación para la verificación transparente de la identidad del usuario. Todos los sistemas informáticos, y sobre todo aquellos relacionados con la seguridad, se encuentran bajo ataque permanente y deben ser diseñados con foco en esta consideración. En particular, un sistema de autenticación basado en cadencias de tecleo puede ser sometido a ataques de presentación con muestras sintetizadas; también, los atributos temporales de la escritura filtrados en el transcurso de un ataque por canal lateral pueden ser utilizados para identificar el texto ingresado o potenciar un ulterior ataque por fuerza bruta. Sin embargo, la mayoría de las veces los métodos propuestos en la literatura han sido evaluados bajo un modelo de esfuerzo cero, también llamado de impostores no entrenados, que subestima o ignora el riesgo de los anteriores. En esta tesis se propone un sistema de detección de vida que emplea una familia de estrategias de síntesis de muestras artificiales, utilizadas como adversarios en un sistema de clasificación aumentado con distancias basadas en los histogramas empíricos del perfil intrausuario, para mitigar los riesgos de un ataque de presentación. Adicionalmente, una modificación del esquema propuesto para la defensa permite abordar el problema de identificación del texto ingresado utilizando sólo atributos temporales, en textos más largos y con listas de candidatos más numerosas que en el estado del arte.
Gestión educativa: dimensiones, factores y desafíos para la transformación de la escuela
Authors: Cárdenas-Tapia Mary Jessica , Callinapa-Lupaca Edwin Alexander , Canaza-Turpo Colbert Francisco , Cateriano Alfredo , Cayllahua José , Calsin Aldo
Published: August 2022

El presente estudio pretende analizar aspectos que rodean a la Gestión Educativa y que de forma directa impactan en el rol pedagógico y el desempeño de las instituciones educativas. En esa línea, dentro de sus dimensiones se consideran el liderazgo directivo, los niveles de planificación estratégica, la evaluación de la gestión y las características del clima institucional como indicadores que definen su desenvolvimiento y las funciones de la Institución Educativa. De igual modo, aun cuando estas dimensiones puedan condicionar la capacidad de gestión institucional, también se adicionan factores que frenan el desarrollo de un buen desempeño institucional, principalmente, aquellos relacionados con la parte administrativa, la falta de capacitación y actualización y la propia realidad precaria del centro educativo. Por último, en base a estos presupuestos de líneas generales, este estudio termina desprendiendo algunos desafíos para la gestión educativa y la transformación de la escuela después de la pandemia del COVID-19.
Spatial Distribution of Bioavailable Metal Concentrations and
Total Metal Concentration-depth Relationship along the Sediment Profile within Phuket Bay
Authors: Akkajit Pensiri , Tipmanee Danai , Jaileak Kaimook
Published: August 2022

Heavy metals in coastal sediments can adversely affect human health and the environment. The distribution and metal bioavailability of Pb and Zn in 21 sediment samples collected from Phuket Bay, Phuket, Thailand using the first-two steps of sequential extraction proposed by the Standards, Measurements and Testing programme (known as BCR) was determined. The results showed that Pb formed weak complexes contributing up to 11.2% to 33% of its total concentration (1.7 to 7.5 mg kg-1) in the first fraction (BCR1), while Zn in the BCR1 fraction ranged from 4.9% to 9.9%. The results suggest that Pb could easily enter the food chain and the main cause of heavy metal contamination is related to local anthropogenic activities and effects of urbanization in the region, such as the ferry terminal, boatyards, and other maritime activities. Meanwhile, the enrichment factors of the metals showed minor to moderately severe enrichment. The metal concentration-depth relationship along the sediment profile showed metal concentration in each layer of the sediment core ranging from 45.4 to 88 mg Zn kg-1 and from 12.7 to 44.5 mg Pb kg-1. Based on the changes in heavy metal accumulation in the sediment core, and the calculated the enrichment factor versus depth, these allowed us to understand the historical variability in pollutant linked to past activities in Phuket Bay.
Pengaruh Krom pada Sambungan Las Terhadap Sifat Mekanik Baja Karbon dengan Elektroda E 6013
Authors: Syaripuddin  , Alamsyah Setyo Firman , Budhi Susetyo Ferry
Published: August 2022

This study aims to determine the effect of the addition of chromium in the SMAW process to the tensile strength, hardness value and macro structure of the low carbon steel welding joint using E6013 electrodes. The research procedure begins with the process of welding, making seam, making specimens: tensile test, hardness test and macro structure. Furthermore, the process of tensile, hardness and macro structure testing is carried out. The tensile strength value of the weld joint with the addition of chrome tends to be slightly smaller than that of the weld without the addition of chrome. The maximum tensile stress and elasticity limits for welded joints with added chrome are higher than for welded joints without added chrome. The addition of chrome to the welding process has been shown to increase hardness. In the macro structure, porosity did not occur both specimens with the addition of chromium and without the addition of chromium.
Sistem Informasi Loyalty Program di Layanan Penjualan Produk Software pada Bagian Point of Sales PT. XYZ
Authors: Suhandono Erwin , Putra Agung Trilaksono Suwarto
Published: August 2022

This research is backed by customer loyalty to the point of sales service tends to decline due to the difficult marketing part of managing customer data manually in accepting and responding to questions related to Web application features and help with how to use them, as more and more customers become difficult to control and track in each issue. The subject in this study is the customer service Manager. Data source is selected using special criteria with the condition of user who experienced directly the event that became the focus of research, able to retell the events that have been experienced, and willing to be a research user who get the conclusion that it needs a system to manage customer data, conduct promotional activities and see the growth of customers online. The data collection techniques in this study use observation methods and library studies. From the results of the research that has been implemented to implement the results of the research into the loyalty program information system in the software product sales service at the point of sales of PT. XYZ in the form of a website to manage customer data by the marketing and Android applications section for customers.