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Документ Determining the dynamics of electromagnetic fields, air ionization, low-frequency sound and their normalization in premises for computer equipment(ПП "ТЕХНОЛОГІЧНИЙ ЦЕНТР", 2022) Glyva, V; Kasatkina, N; Levchenko, L; Tykhenko, O; Nazarenko, V; Burdeina, N; Panova, O.; Bahrii, M.; Nikolaiev, K.; Biruk, Y.Computers are an important technical tool in many types of administrative, production, and educational activities. They are the main tool in managing technological processes at industrial enterprises, in air traffic management, the generation and transmission of electricity, etc. Users of this category perform responsible work, the quality and infallibility affect the safetyof people, the smooth operation of enterprises, and the quality of products. Therefore, such personnel must be provided with the most favorable working conditions. Significant impact on workers is exerted by such physical factors of the production environment as microclimate, electromagnetic fields, insufficient air ionization, noise.Документ «Development and investigation of protective properties of the electromagnetic and soundproofing screen»(// Eastern-European Journal of Enterprise Technologies (Восточно-Европейский журнал передовых технологий) // 2018, Vol.6, №5(96), р.54-61., 2018) Glyva, V.; Lyashok, J.; Matvieieva, I.; Frolov, V.; Levchenko, L.; Tykhenko, O.; Panova, O.; Khodakovskyy, O.; Khalmuradov, B.; Nikolaiev, K.Розроблено технологiю виготовлення унiверсального електромагнiтного та умозахисного екрана на основi пiнолатексу та пiнополiстиролу. Проведенi дослiдження дисперсностi та фiзичних характеристик компонентiв матерiалу для екранування електромагнiтного поля та шуму. Розроблений матерiал складається з латексу та залiзорудного пилу з переважною дисперснiстю 12 мкм. Для пiдвищення шумозахисних властивостей у процесi виготовлення латексу до нього додавався пiноутворювач – синтетична олеїнова кислота. Для зменшення ваги у матерiал додавався гранульований полiстерол розмiрами 1−3 мм. Проведенi дослiдження екранiв товщинами 5 мм та 10 мм з рiзним вмiстом металевої субстанцiї. Визначено, що коефiцiєнти екранування матерiалу товщиною 5 мм для вмiсту залiзної руди 5−20 % складають: для електромагнiтного поля частотою 2,4−2,6 ГГц – 1,8−44; для магнiтного поля промислової частоти − 1,2−15,0. Для матерiалу товщиною 10 мм – 2,9–52,0 та 2,3–38,4 вiдповiдно. Iндекс зниження шуму 41−44 дБ досягається на частотах шуму 6−8 кГц, найбiльш критичних для людини. Проведенi структурнi дослiдження поверхнi матерiалiв. Встановлено, що за вмiсту металевої субстанцiї вiд 15 % її розподiл у тiлi матерiалу стає нерiвномiрним. Для пiдвищення ефективностi електромагнiтного захисту доцiльно попередньо виготовити iз залiзорудного пилу магнiтну або реологiчну рiдину i використати її у технологiчному процесi виготовлення пiнолатексу. Доведено, що комбiнованi електромагнiтнi та шумозахиснi (акустичнi) екрани, маючи малу товщину та вагу, можуть забезпечити зниження рiвнiв електромагнiтних полiв та шуму до нормативних, що особливо важливо при їх застосуваннi у транспортнiй галузi.Документ Development and study of protective properties of the composite materials for shielding the electromagnetic fields of a wide frequency range(2020) Glyva, V.; Kasatkina, N.; Nazarenko, V.; Burdeina, N.; Karaieva, N.; Levchenko, L.; Panova, O.; Tykhenko, O.; Khalmuradov, B.; Khodakovskyy, O.1. The technology of fabrication of a metal-textile material for shielding electromagnetic fields was developed. It is based on the influence of a constant magnetic field of high heterogeneity from two magnetic conductors on a textile material impregnated with a magnetic fluid containing ferromagnetic nanoparticles. This has made it possible to reduce magnetic fluid consumption from 45‒50 g/m2 to 35 g/m2 compared to its counterparts and increase the number of shielding particles implanted into fabric fibers from 1.5‒1.6 g/m2 to 2.9‒3.0 g/m2. 2. The technology of manufacturing metal-polymeric material has been developed. It differs from its counterparts in pre-treatment of a mixture of iron ore concentrate and liquid polymer by ultrasonic radiation at a frequency of 23 kHz and amplitude of 45–50 μm. This has enabled an increase in the dispersity of the iron ore substance by mechanical action and ensured uniform distribution of particles in the polymer by intensive ultrasonic mixing. 3. The study of protective properties of a single-layer textile material has shown that the guaranteed shielding factor in protection against the magnetic component of the electromagnetic field of industrial frequency and its harmonics amounted to 6. The shielding factor of the electrical component was 1.5. The shielding factor in protection against an electromagnetic field of ultrahigh-frequency (2.45 GHz) was 3.6. Such values indicate the suitability of the studied materials for the manufacture of personal protective means. 4. Studies of protective properties of the metal-polymer material have shown that the guaranteed shielding factor for the magnetic component of the electromagnetic field of industrial frequency and its harmonics is 3. The shielding factor for the electrical component is 2. The shielding factor for the electromagnetic field of ultra-high frequency (2.45 GHz) is 5.7. Such protective properties indicate the possibility of using the material as a means of collective protection, for example in facing surfaces of large areas.Документ Development of models of the electromagnetic environment in buildings and urbanized areas(Технологічний центр, 2022-12-30) Levchenko, Larysa; Ausheva, Nataliia; Burdeina, Nataliia; Aznaurian, Iryna; Biruk, Yana; Kasatkina, Nataliia; Matvieieva, Iryna; Nazarenko, Vasyl; Nikolaiev, Kyrylo; Tykhenko, OksanaA set of measures and means to control the electromagnetic situation of the environment in the territories of urban development, in buildings and individual premises has been substantiated and developed. The simulation tools show the ability to rationalize the parameters of overhead lines with voltages of 220 kV and below, which will reduce the electromagnetic load in the territories. Modeling the propagation of fields from underground high-voltage lines has established that the values of magnetic fields compared to overhead lines are lower up to 30 times. Models of propagation of electromagnetic fields of very high and ultrahigh frequency were built. Sources of electromagnetic fields of non-production origin in industrial buildings have been investigated. Uncompensated currents in power networks with nonlinear electric consumers generate magnetic fields by induction of 0.35–1.20 μT, which exceeds the maximum permissible levels of operation of computer equipment. Leakage currents on grounded metal structures generate magnetic fields with 1.52–6.75 μT. Simulation of the propagation of electric and magnetic fields of components of personal computers of controlled ranges according to the MPRII standard was carried out. Models of propagation of the magnetic field of industrial frequency around electric motors and generators with their cross sections were built. On the basis of such models, design schemes for placing equipment in production areas are selected or places of safe stay and movement of personnel are selected. The expediency of using shielding to reduce field levels to safe values due to coating surfaces with liquid protective mixtures was shown. Metal-containing composition based on water-dispersion paint makes it possible to reduce the level= of magnetic field of industrial frequency by 2.5–2.6 times, electric field by 1.6–1.7 times, electromagnetic field of industrial frequency – by 1.2–1.3 times.Документ Electro-optical effects in 2D macroporous silicon structures with nanocoatings.(Semiconductor Physics, Quantum Electronics & Optoelectronics, 2015. V. 18, N 4. P. 377-384., 2015) Sapelnikova, O.; Karachevtseva, L.; Parshyn, K.; Lytvynenko, O.; Konin, K.; Stronska, O.Документ Electromagnetic screens application for population protection from electromagnetic fields and radiation(Electromagnetic screens application for population, 2018-10-10) Glyva, V.; Panova, O.Conclusions 1. Assessment of electromagnetic environment has to be conducted prior to screen material and structure selection; it includes determination of frequency and amplitude parameters of electromagnetic fields and external and internal sources radiation. 2. It is necessary to choose reasonable correlation of attenuation and reflection screen parameters for maximal reduction of this physical factor impact on human. It is efficient to apply graphic dependencies given in this paper. 3. Ferromagnetic electromagnetic screens application is the most acceptable under condition of full blocking of field source or with accounting reflection effect that enables preliminary calculation of shielding efficiency based on geometrical issues exclusively. 4. Variability of shielding coefficients has to be taken into account at electromagnetic shielding application because of diffraction phenomena at the screen edges. 5. In all cases it is necessary to take into account the feasibility of screen production and installation, as well as its cost, which is provided by rationalization of shielding and reflection coefficients selection (i.e. with principle of reasonable adequacy).Документ Elements of technology for the surface gipsum composite and its properties, as a facing material(ОДАБА, 2022-03) Tarasevych, V. I.; Gasan, Yu. G.The paper considers the issues of obtaining a composite material based on gypsum, fly ash and sulfur with improved performance. Regularities of impregnation of a gypsum sol matrix with a sulfur melt are established, taking into account the capillary-porous structure of the gypsum sol stone and the physical and technical properties of sulfur. The conducted studies make it possible to determine the sulfur mass transfer coefficient ams and the maximum sulfur-containing Us in impregnated products, depending on the initial values of the sulfur melt temperature, water-solid ratio and fly ash content. This allows to determine quickly and effectively the duration of impregnation to a given sulfur content for a specific composition and size of gypsum products. Technological factors influencing the hardening coefficient, water resistance and chemical resistance of gypsum ash products impregnated in sulfur melt have been studied. An analysis of the results shows that the strength of samples impregnated with sulfur increases while the degree of filling of the pore space with it is increasing. So, with increase in the relative sulfur content (v = Us / Usmax) from 0.30 to 0.90, the compressive strength increases from 10.1 to 42 MPa. It has been established that water resistance of the impregnated samples significantly depends on the degree of impregnation and the amount of fly ash. The experiments carried out give reason to believe that the material based on gypsum, ash and sulfur refers to waterproof materials, since the softening coefficient is higher than 0.7. It has been established that gypsum and gypsum samples impregnated with sulfur melt have a chemical resistance coefficient of at least 0.7, which allows them to be classified as chemically resistant. The resulting sulfur-gypsum composite is distinguished by high strength, water and corrosion resistance to aggressive environments of livestock complexes, food and chemical industries, where it should be used in the form of special facing products. В роботі розглянуті питання отримання композиційного матеріалу на основі гіпсу, золи-виносу та сірки з підвищеними експлуатаційними характеристиками. Встановлено закономірності просочення гіпсозольної матриці розплавом сірки з урахуванням капілярнопористої структури гіпсозольного каменю та фізико-технічних властивостей сірки. Проведені дослідження дозволяють визначати коефіцієнт масопереносу сірки ams та максимального сірковмісту Us у просочених виробах, залежно від вихідних значень температури розплаву сірки, водотвердого відношення та вмісту золи-виносу. Це дозволяє ефективно та оперативно визначати тривалість просочення до заданого вмісту сірки для конкретного складу та розміру гіпсозольних виробів. Досліджено технологічні фактори, що впливають на коефіцієнт зміцнення, водостійкість та хімічну стійкість гіпсозольних виробів, просочених у розплаві сірки. Аналіз результатів показує, що міцність просочених сіркою зразків підвищується зі збільшенням рівня заповнення нею порового простору. Так, при збільшенні відносного вмісту сірки (v= Us/Usmax) з 0,30 до 0,90 межа міцності при стисканні підвищується з 10,1 до 42 МПа. Встановлено, що водостійкість просочених зразків істотно залежить від ступеня просочення та кількості золивинесення. Проведені експерименти дають підставу вважати, що матеріал на основі гіпсу, золи та сірки відноситься до водостійких матеріалів, оскільки коефіцієнт розм'якшення вище 0,7. Встановлено, що гіпсові та гіпсозольні зразки, просочені розплавом сірки, мають коефіцієнт хімічної стійкості не менше 0,7, це дозволяє віднести їх до хімічно стійких. Отриманий сіркогіпсовий композит відрізняється високою міцністю, водо- та корозійною стійкістю до агресивних середовищ тваринницьких комплексів, підприємств харчової та хімічної промисловості, де його слід використовувати у вигляді спеціальних облицювальних виробів. Ключові слова: сірка, гіпс, зола, водостійкість, хімічна стійкість, розплав сірки.Документ Evaluation of the frost resistance of concrete in real operating conditions(IOP Conference Series: Materials Science and Engineering, 2020-09) Краснянський, Григорій Юхимович; Азнаурян, Ірина Олександрівна; Лаповська, Світлана Давидівна; Клапченко, Василь ІвановичKey words: the frost resistance of concrete, adsorption isobars, humidity, a conductometric method, the kinetics of moisture diffusion, capillary-porous structure Abstract. The article proposes a method for evaluating the frost resistance of concrete at actual operating temperatures, using measurement results at temperatures that are regulated by current standards. Frost resistance was evaluated by determining the amount of water freezing at different temperatures, based on the measured adsorption isobars and the obtained relationship between the freezing temperature of water in concrete pores and relative humidity. A comparison of the calculated values of the frost resistance of concrete with those got based on direct measurements showed the adequacy of the calculation model. To get information about the frost resistance of concrete during unilateral freezing, a conductometric method was used to determine the kinetics of moisture diffusion and ice formation. It is shown that the use of this method allows one to establish the propagation speed of the ice formation and water diffusion front and the corresponding freezing depth of concrete samples depending on their capillary-porous structure and initial storage conditions. In general, the studies conducted allowed us to get a more reliable picture of the behaviour of concrete under alternating temperature load than is provided for by current regulatory documents.Документ Features of quantitative measurements of the dynamic module of elasticity of binders in optimization of production technology serogypsum composite(ОДАБА, 2021-06) Tarasevych, V. I.; Gasan, Yu. G.; Dolgoshey, V. B.The paper considers the issues of studying the structure formation of binders during hardening to determine the optimal moments of mechanical action on gypsum concrete specimens, which makes it possible to optimize the technology of their impregnation with sulfur melt. The time dependence of the elastic modulus of a hardening, binder is its important physicochemical characteristic, since it is used to objectively identify the stages of structure formation, to simulate the processes occurring at each of the stages. It is noted that the method of acoustic resonance of bending vibrations, in the case of hardening binders, needs correction with respect to the measurement technique and interpretation of the results obtained. The kinetics of the resonance frequency of a sample consisting of a rigid cell and a dispersion poured into it is a function of the elastic properties of the cell, the dispersion itself, the contact zone of the dispersion with cell and therefore cannot be used for either qualitative or quantitative analysis of the kinetics of hardening. Taking into account the elasticity of cuvette is necessary to obtain reliable information. В роботі розглянуті питання дослідження структуроутворення в’яжучих в процесі тверднення для визначення оптимальних моментів механічної дії на гіпсобетонні зразки, що дозволяє оптимізувати технологію їх просочування розплавом сірки. Часова залежність модуля пружності твердіючого в’яжучого є його важливою фізико-хімічною характеристикою, оскільки вона використовується для об’єктивного виділення етапів структуроутворення, моделювання процесів, що протікають на кожному з етапів. Відмічається, що метод акустичного резонансу, у випадку твердіючих в’яжучих, потребує корекції відносно методики вимірювань та трактовки отриманих результатів. Кінетика резонансної частоти зразка, що складається з жорсткої кювети і залитої в неї дисперсії, є функцією пружних властивостей кювети, самої дисперсії, зони контакту дисперсії з кюветою і тому не може бути використана ні для якісного, ні для кількісного аналізу кінетики твердіння. Врахування пружності кювети є необхідним для отримання достовірної інформації.Документ Influence of local electric fields on the photoluminescence of CdS nanocrystals on the oxidized macroporous silicon surface(Chemistry, Physics and Technology of Surface., 2015) Sapelnikova, O.; Karachevtseva, L.; Lytvynenko, O.; Stroyuk, O.; Wrang Bo; Kuchmii, S.; Parshyn, K.Документ Intelligent information technologies implementation to the process of professional self-identification(CEUR Workshop Proceedings, 2012-03) Aznaurian, Iryna; Yeremenko, Bohdan; Riabchun, Yuliia; Ploskiy, Vitalii; Mezzane, Daoud; Kryvinska, NataliaThe latest learning technologies implementation, based on new approaches to the presentation and acquisition of knowledge, requires appropriate modern methods of assessment. The search for perfect methods for assessing the abilities of entrants and students at the present stage of information technology development is extremely important, because the objectification of the assessment process, providing feedback, provides an opportunity to coordinate the development of personality. The main attention in this paper is directed on the decision of questions of professional orientation by means of testing which assumes performance of game tasks of a professional direction. The research presents a conceptual model of a specialized intelligent system, which is designed to support the decision of the applicant to choose a specialty of higher education institution of construction profile. The paper also shows fragments of the system with professional game tasks, which reflect the level of spatial imagination of the individual and the ability to perform functional duties in accordance with the personnel requirements of different professions of construction. The formation scheme of the recommendatory conclusion on results of performance of these tasks is offered the mechanism of fuzzy inference of the recommendatory conclusion is shown. Clear and fuzzy criteria are proposed that can be used to justify the recommendation conclusion. The possibility of using the fuzzy artificial neural network Takagi-Sugeno-Kang to setup the parameters of the model used to reflect certain professional abilities of the individual is shown.Документ Light-emitting structures of CdS nanocrystals in oxidized macroporous silicon.(2016) Sapelnikova, О.; Karachevtseva, L.; Kuchmii, S.; Stroyuk, O.; Lytvynenko, O.; Stronska, O.; Bo Wang; Kartel, M.Structured silicon substrates (macroporous silicon) with Si02 nanolayers and CdS nanocrystals were proposed to reduce the flow of electrons and recombination outside the nanoparticle layer. It was found that the,resonance electron scattering in samples with low concentration of Si—0—Si states transforms into ordinary scattering on ionized impurities for samples with high concentration of Si—0—Si states. The maximal intensity of photoluminescence was measured for a structure with maximum strength of the local electric field at the Si—Si02 interface, indicating a significant decrease of non-radiative recombination in CdS nanocoating due to the flow of electrons from the silicon matrix towards the CdS nanocrystal layer. The quantum yield of photoluminescence increases with time due to evaporation of water molecules.Документ Materiality of the gravitational field and the process of development of macroscale gravitational collapse(КНУБА, 2021) Клапченко, Василь Іванович; Краснянський, Григорій Юхимович; Кузнецова, Ірина ОлександрівнаThe materiality of the gravitational field is taken into account on the basis of the law of universal gravitation, accepted as an exact law describing the pairwise interactions of massive bodies. Unlike Brillouin and Lucas, who were the first to carry out such an account and obtain a negative value of the field mass, the field mass in our work has the same sign as the mass itself. Replacing the "mass-gravitational field" representation with "mass-field mass" distinguishes gravity from other interactions, leads to an increase in mass in such interactions, indicates the existence of a double effect of gravity and allows its physical modeling. In particular, it has been shown that, despite the small value of the relative mass gain in pair interactions, during the formation of clusters of stars with a large number of bodies, the relative mass gain increases nonlinearly. Under certain conditions, this increase becomes infinite, symbolizing the onset of a macroscale gravitational collapse, resulting in the formation of supermassive black holes. Attention is focused on the fact that the final mass of a supermassive black hole (invisible mass) can be tens and hundreds of times greater than the initial mass of the cluster (visible mass). Moreover, half of the black hole's mass is outside the gravitational radius of the black hole, forming a massive invisible halo. According to the authors, a macroscale collapse based on taking into account the materiality of the gravitational field can be considered as one of the effective mechanisms for the formation of invisible (dark) matter in the Universe.Документ Method of electromagnetic screen shielding properties determination(Академия ГПС МЧС России, 2014) Glyva, V. A.; Panova, O. V.Negative influence of anthropogenic electromagnetic fields and radiation on human is beyond doubt [1]. Methods of human protection from this physical factor are known and applied [2]. Nevertheless specific instructions concerning control of materials shielding properties are absent in sanitary code. Experimental investigations aimed at the assessment of screening materials shielding properties are given in the paper [3]. However, given measurement methods, on our opinion, are imperfect.Документ Methodological principles of electromagnetic screens application for public protection from electromagnetic fields and radiation(2017) Glyva, V.; Panova, O.; Voloshkina, O.The aim of the study is to determine the electromagnetic screens application depending on frequency and amplitude of shielded field or radiation, their sources allocation and provision of practical guidelines on regulation of protective materials selection. Electromagnetic shielding is the most urgent for the provision of standard electromagnetic environment in buildings and constructions (except certain objects, for example, civil aviation enterprises), i.e. for electromagnetic ecology of premises. It is also necessary to take into account the presence of both internal and external sources of fields and radiation.Документ Optimization of the composition of hydrophobized cellular concrete according to its moisture-transporting and water-holding characteristics(IOP Publishing, 2020) Лаповська, С. Д.; Клапченко, В. І.; Краснянський, Г. Ю.; Гасан, Ю. Г.; Кузнецова, Ірина ОлександрівнаThe article is devoted to the study of the possibility of obtaining information about frost resistance and strength of concrete based on the analysis of its moisture-transporting and equilibrium water-holding properties. The dependences of the moisture diffusion coefficient, equilibrium moisture content at various values of relative humidity and porosity of autoclaved cellular concrete specimens on the concentration of water-repellent additive were studied. A comparison of the results of these measurements with the data on frost resistance, got by the direct method according to the current standards, have been made. It is shown, that moisturetransporting and water-holding characteristics can be used to assign concrete compositions optimal in frost resistance and strength. The mechanisms of the influence of water repellent on the frost resistance at its various concentrations are considered. It has been established that the composition of cellular concrete containing 2% water-repellent additive is optimal.Документ Quantum-sized effects in oxidized silicon structures with surface II-VI nanocrystals.(Semiconductor Physics, Quantum Electronics & Optoelectronics., 2014) Sapelnikova, O.; Karachevtseva, L.; Lytvynenko, O.; Stroyuk, O.; Smirnov, O.; Matveeva, L.; Kolyadina, O.; Kuchmii, S.Документ Quasi-guided and photonic modes in 2D macroporous silicon structures with SiO2 nanocoatings.(Xiмiя, Фiзикa ma mexнoлoгiя noвepxнi., 2015) Sapelnikova, O.; Karachevtseva, L.; Lytvynenko, O.; Parshyn, K.; Wrang BoWe investigated the IR light absorption oscillations in 2D macroporous silicon structures with SiO2 nanocoatings 70-800 nm thick. The Wannier-Stark electro-optical effect due to the strong electric field on Si-SiO2 interface and an additional electric field of quasi-guided optical modes were analyzed. The photonic modes and band gaps were also considered as peculiarities in absorbance spectra of macroporous silicon structures with a thick SiO2 nanocoating.Документ Studying the shielding of an electromagnetic field by a textile material containing ferromagnetic nanostructures(PC Technology Center, 2020-03) Glyva, V.; Barabash, O.; Kasatkina, N.; Katsman, M.; Levchenko, L.; Tykhenko, O.; Nikolaiev, K.; Panova, O.; Khalmuradov, B.; Khodakovskyy, O.Розроблено технологію виготовлення текстильного матеріалу з вмістоферомагнітних наночастинок для екранування електромагнітних полів. Показано, що найбільш ефективним методом зчеплення наночастинок з волокнами текстильного матеріал є нанесення магнітної рідини з наночастинками на матеріал та витримка його у неоднорідному постійному магнітному полі. За умов напруженості магнітного поля 450 А/м та його впливу протягом 12 годин імплантація наночастинок у льняну тканину стає практично незворотною. Досліджено захисні властивості розробленого матеріалу. За просочення магнітною рідиною з витратами 45–50 г/м2 (вміст феромагнітних частинок – 9 % за вагою) коефіцієнти екранування для 1–3 шарів матеріалу складають: для електричного поля промислової частоти 1,4÷4,8 ; для магнітного поля – 1,9÷8,1. Після магнітної обробки ці показники складають 2,9÷8,6 та 2,3÷8,9 відповідно. Для видалення з магнітної рідини технологічних компонентів, таких як вакуумне мастило та олеїнова кислота, достатньо застосувати синтетичний миючий засіб, що підтверджено експериментальним шляхом. Досліджено ефективність отриманого результату у реальних вироб- ничих умовах. Встановлено, що зниження напруженості магнітного поля промислової частоти та її інтергармонік одним шаром просоченого матеріалу без магнітної обробки складає 1,4, з магнітною обробкою – 2. При цьому не відбувається суттєвого зниження рівня природного геомагнітного поля. Проведено моделювання розподілу магнітного поля у тілі людини у разі виготовлен- ня з розробленого матеріалу захисного костюму. За умов гарантованого зниження напруженості магнітного поля у 2 рази у критичних місцях спостерігається підвищення рівня поля у шийному відділі через підвищення у цьому місці магнітного опору. Це необхідно враховувати при проекту ванні конфігурації захисного костюму Ключові слова: електромагнітне поле, наночастинки, текстильний матеріал, коефіцієнт екранування, магнітна обробка...Документ Studying the shielding of an electromagnetic field by a textile material containing ferromagnetic nanostructures(Eastern-European Journal of Enterprise Technologies, 2020) Glyva, V.; Barabash, O.; Kasatkina, N.; Katsman, M.; Levchenko, L.; Tykhenko, O.; Nikolaiev, K.; Panova, O.; Khalmuradov, B.; Khodakovskyy, O.1. It has been established that the most efficient method to ensure the sticking together between ferromagnetic nanoparticles and a textile material is to apply a magnetic liquid to the material and to expose it to a heterogeneous permanent magnetic field. Our study has proven that under the influence of a magnetic field with an intensity of 450 A/m for 12 hours the implantation of nano-particles into the fibers of a linen fabric becomes practically irreversible. 2. The study has shown that when impregnating a textile material with a magnetic liquid in the amount of 45–50 g/m2 (the content of nanoparticles is 9 % by weight) the shielding coefficients for 1–3 layers of the material are: for an electric field of industrial frequency, 1.4÷3.8; for a magnetic field, 1.9÷8.1. Following the magnetic treatment of the material, these indicators are 2.9÷8.6 and 2.3÷8.9, respectively. At the same time, the magnetically-treated material was treated with a synthetic detergent. Fig. 2. The distribution of a magnetic field В/В0 in the human body (in the middle plane) exposed to the longitudinal magnetic field В0 and in the presence of protective clothing: a, b, c ‒ the presence of 1, 2, 3 layers of protective fabric Ecology 31 3. It has been etermined that in order to remove the technological liquids (grease, oleic acid), which are the mandatory ingredients of a magnetic liquid, it would suffice to use synthetic etergents. In this case, the degree of washing out the ferromagnetic particles is acceptable. The use of the ethyl alcohol-based fluid, with the subsequent neutralization of oleic acid by an alkaline solution, turned out to be impractical because of the washout or chemical destruction of the nano-particles by alkali, which was confirmed experimentally. 4. In order to determine the possibility of manufacturing special clothing from the designed material aimed to protect against electrical and magnetic fields, we simulated the magnetic field distribution in the human body using a finite element method and the Comsol oftware. It was established that, notwithstanding the acceptable, in general, results, the cervical spine of the human body experiences the increased field intensity due to the magnetic flux compression. This should be taken