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Journal articles on the topic 'Electromagnetic (EM) fields'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 June 2025

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1

Doria, R. M., and I. Soares. "Four Bosons EM Conservation Laws." JOURNAL OF ADVANCES IN PHYSICS 19 (May 27, 2021): 40–92. http://dx.doi.org/10.24297/jap.v19i.9024.

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Electromagnetism is expressed from two basic postulates. They are light invarianceand charge conservation. At this work one extends the Maxwell scenario from macroscopic to microscopic electromagnetism by following the elementary particles electric charge microscopic behavior. It yields a triune electric charge interrelationship. Three charges {+, 0, −} be exchanged through a vector bosons quadruplet. It is called Four Bosons Electromagnetism. A systemic EM physics appears to be understood. Maxwell photon is not enough for describing the microscopic electric charge physics. An extension for el

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Chauca, J., R. Doria, and R. Soares. "Four Bosons EM Gauge Invariance and EM Flux." JOURNAL OF ADVANCES IN PHYSICS 19 (October 25, 2021): 281–345. http://dx.doi.org/10.24297/jap.v19i.9054.

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Electromagnetic phenomena is based on electric charge and spin. However, Maxwell equations are just macroscopic. There is a microscopic EM phenomena to be understood. A performance originated from electric charge microscopic behavior. Thus, keeping on mind the two basic EM postulates, which are light invariance and charge conservation, Maxwell is extended to a Four Bosons Electromagnetism. It says that, the macroscopic Maxwell equations does not describe all electromagnetism. The electric charge physics has been studied microscopically through elementary particle physics. A new perception of E

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Doria, R., and L. S. Mendes. "On the electromagnetic symmetry producing fields charges at four bosons association." JOURNAL OF ADVANCES IN PHYSICS 21 (May 25, 2023): 34–62. http://dx.doi.org/10.24297/jap.v21i.9437.

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Physics would like to know what electric charge is. As a matter property it generates EM fields, coupling constant,conserved current. Nevertheless Maxwell is uncomplete. It requires to be extended. An approach is supported byelectric charge transfer phenomenology. Consider on three flavours charges {+, 0, −} transmission.A generic electric charge is defined by the triad {+, 0, −}. It provides an exchange charge physics through thequadruplet {Aμ, Uμ, V ± μ }. An electromagnetic symmetry is constituted. It associates the four vectorial bosons. TheEM completeness of particles carrying three elect

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Livingston, Gordon K., Kristine L. Witt, Om P. Gandhi, Indira Chatterjee, Joseph L. Roti Roti, and L. G. Littlefield. "Reproductive integrity of mammalian cells exposed to power frequency electromagnetic fields." Environmental and Molecular Mutagenesis 17, no. 1 (1991): 49–58. http://dx.doi.org/10.1002/em.2850170108.

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Voloshko, Т. E., та О. V. Fedotov. "ВПЛИВ ЕЛЕКТРОМАГНІТНИХ ПОЛІВ НА АКТИВНІСТЬ ОКСИДОРЕДУКТАЗ ДЕЯКИХ ВИДІВ БАЗИДІОМІЦЕТІВ". Biological Bulletin of Bogdan Chmelnitskiy Melitopol State Pedagogical University 3, № 02 (2013): 45. http://dx.doi.org/10.15421/20133_16.

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<p>The influence of electromagnetic fields of various modes of irradiation on the activity of oxidoreductases of basidiomycetes <em>Agrocybe cylindracea</em>; <em>Pleurotus ostreatus</em> and <em>Fistulina hepatica</em> in culture was investigated. The strains were cultured of glucose-peptone medium for 12 days. The accumulation of oven-dry biomass was determined by the weight method. The content of soluble protein, catalase, peroxidase and superoxide dismutase activities was determined by the spectrophotometric methods. It was found, that the level of

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Górski, Romuald, Hanna Dorna, Agnieszka Rosińska, Dorota Szopińska, and Stanisław Wosiński. "Effects of Electromagnetic Fields and their Shielding on the Quality of Carrot (Daucus Carota L.) Seeds." Ecological Chemistry and Engineering S 26, no. 4 (2019): 785–95. http://dx.doi.org/10.1515/eces-2019-0055.

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Abstract The aim of the study was to determine the effect of electromagnetic fields and their shielding on carrot seed quality. Three sectors were separated on the device emitting electromagnetic fields: “E” - sector emitting electromagnetic radiation with the predominance of the electrical component, “EM” - sector emitting electromagnetic radiation without domination of its components and “M” - sector with a predominance of magnetic component. Fields generated by the device were also shielded with ADR TEX screen, based on a nanocomposite in which the electric component of the electromagnetic

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Olsen, Kim Bak, and Gerald W. Hohmann. "Adaptive noise cancellation for time‐domain EM data." GEOPHYSICS 57, no. 3 (1992): 466–69. http://dx.doi.org/10.1190/1.1443260.

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A typical time‐domain electromagnetic (TDEM) survey is carried out by recording the transient response of the target area due to currents induced by the abrupt turnoff of the current in a large ungrounded loop at the surface. The depth of exploration is controlled by the strength of the transient signal at late times, when the natural fields become comparable in amplitude to the controlled‐source response (Spies, 1989). Nichols et al. (1988) claim that it should be possible to reduce the natural magnetic fields in controlled source electromagnetic data by 40–60 dB because the fields are cohere

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Yin, Changchun, and Greg Hodges. "3D animated visualization of EM diffusion for a frequency-domain helicopter EM system." GEOPHYSICS 72, no. 1 (2007): F1—F7. http://dx.doi.org/10.1190/1.2374706.

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The electromagnetic fields inside the earth are calculated by continuation downward of the electromagnetic (EM) solutions at the location of a frequency-domain helicopter electromagnetic (HEM) sensor. Models examined using the continuation approach include a layered isotropic and anisotropic earth. The finite-element approach is used to model 2D structures of a dipping contact or a dipping dike. By incorporating a time factor, we display the EM diffusion in the earth (change in direction and amplitude of the EM field through time) as 3D animated vectors or contours. The propagation of the EM s

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Doria, Renato, J. Helayel, M. Chaichian, E. Spallucci, M. Botta Cantcheff, and A. Shabad. "A New Model for a Non-Linear Electromagnetic Model with Self-Interacting Photons." JOURNAL OF ADVANCES IN PHYSICS 7, no. 3 (2015): 1840–96. http://dx.doi.org/10.24297/jap.v7i3.1579.

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A new electromagnetism is still expected to be developed. Thus, under such a principlewhere nature works as a group, an electromagnetism beyond Maxwell is studied. It considersthat light metric antecedes electric charge for founding the EM phenomena. Based on wholenessprinciple, Lorentz group and gauge invariance this electromagnetism sticked on light is proposed.Then, by electromagnetism it will be understood the physics derived from Lorentz group potentialfields family (for simplicity other fields are not included). New electromagnetic fields,sectors, layers and regimes are developed. It yie

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Boerner, D. E., and J. S. Holladay. "Approximate Fréchet derivatives in inductive electromagnetic soundings." GEOPHYSICS 55, no. 12 (1990): 1589–95. http://dx.doi.org/10.1190/1.1442810.

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Fréchet derivatives play dual roles in electromagnetic (EM) methods as averaging functions relating conductivity to EM fields and as sensitivity functions relating conductivity perturbations to changes in these fields. For one‐dimensional EM inductive sounding, the Fréchet derivatives are not strongly model‐dependent, even for quite diverse earth models. In fact, using a scaled version of the Fréchet derivative for a uniform half‐space to approximate the exact Jacobian in a layered earth inversion program can actually improve the convergence to an acceptable model. This lack of a strong model

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Górski, Romuald, Hanna Dorna, Agnieszka Rosińska, Dorota Szopińska, and Stanisław Wosiński. "Effects of Electromagnetic Fields and their Shielding on the Growth of Dwarf Runner Beans." Ecological Chemistry and Engineering S 27, no. 3 (2020): 457–71. http://dx.doi.org/10.2478/eces-2020-0029.

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AbstractThe aim of the study was to determine the effect of electromagnetic fields and their shielding on the growth of dwarf runner bean Phaseolus coccineus L. Three sectors were separated on the device emitting electromagnetic fields: “E” - sector emitting electromagnetic radiation with the predominance of the electrical component, “EM” - sector emitting electromagnetic radiation without domination of its components and “M” - sector with a predominance of magnetic component. Fields generated by the device were also shielded with ADR TEX, a screen based on a nanocomposite in which the electri

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12

Shi, Keni, Xiqing Peng, Ting Xu, et al. "Precise Electromagnetic Modulation of the Cell Cycle and Its Applications in Cancer Therapy." International Journal of Molecular Sciences 26, no. 9 (2025): 4445. https://doi.org/10.3390/ijms26094445.

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Precise modulation of the cell cycle via electromagnetic (EM) control presents a groundbreaking approach for cancer therapy, especially in the development of personalized treatment strategies. EM fields can precisely regulate key cellular homeostatic mechanisms such as proliferation, apoptosis, and repair by finely tuning parameters like frequency, intensity, and duration. This review summarizes the mechanisms through which EM fields influence cancer cell dynamics, highlighting recent developments in high-throughput electromagnetic modulation platforms that facilitate precise cell cycle regula

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McFadden, Johnjoe. "The Electromagnetic Will." NeuroSci 2, no. 3 (2021): 291–304. http://dx.doi.org/10.3390/neurosci2030021.

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The conscious electromagnetic information (cemi) field theory proposes that the seat of consciousness is the brain’s electromagnetic (EM) field that integrates information from trillions of firing neurons. What we call free will is its output. The cemi theory also proposes that the brain has two streams. Most actions are initiated by the first non-conscious stream that is composed of neurons that are insulated from EM field influences. These non-conscious involuntary actions are thereby invisible to our EM field-located thoughts. The theory also proposes that voluntary actions are driven by ne

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Islomov, Muhammad. "PLANE ELECTROMAGNETIC WAVE PARAMETERS." MODERN SCIENCE AND RESEARCH 3, no. 2 (2024): 88–91. https://doi.org/10.5281/zenodo.10629568.

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<em>Nowadays, in practice, when it is required to calculate electromagnetic fields, the use of some mathematical model is of great importance. Because, with the help of this model, it is possible to express the propagation of electromagnetic waves in real conditions. One of them is the plane electromagnetic wave model, which can be used to calculate many wave processes. Let's first understand a little bit about the plane electromagnetic wave. In this, first of all, it is necessary to learn the concept of wave front or wavy surface.</em>

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15

Wilhelm, H. E. "Electromagnetic Field of Accelerated Charges in Inertial Frames with Substratum Flow." Zeitschrift für Naturforschung A 45, no. 5 (1990): 749–55. http://dx.doi.org/10.1515/zna-1990-0527.

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Abstract By means of the generalized Galilei covariant EM field equations, the EM potentials and EM fields of a charged particle moving with an arbitrary nonuniform velocity v(t) in an inertial frame with substratum flow w are calculated. It is shown that the dynamic EM fields are excitations of the EM ether caused by the motion v(t) - w of the charge relative to the wave carrier with velocity w. Qualitatively and quantitatively significant EM inductions and convective deformations of EM fields by the ether flow w exist in inertial frames with ether velocities w~c0 comparable to the velocity o

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Couto, M., and R. Doria. "Maxwell to Photonics." JOURNAL OF ADVANCES IN PHYSICS 20 (December 11, 2022): 330–37. http://dx.doi.org/10.24297/jap.v20i.9336.

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The main topic to be addressed is the search for a new source of energy: light. Electromagnetism has been the energy that has most changed civilisation in the last two centuries. The emergence of photonics instead of electronics is a new challenge. Photonics is the clean energy to look for. The 20th century was that of electrons. Several innovations took place through electronics. However, despite these numerous innovations due to the electromagnetic properties of the electron, the 21st century will be that of the photon. The advent of a new generation of innovations arising from the electroma

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Løseth, Lars O., Hans M. Pedersen, Bjørn Ursin, Lasse Amundsen, and Svein Ellingsrud. "Low-frequency electromagnetic fields in applied geophysics: Waves or diffusion?" GEOPHYSICS 71, no. 4 (2006): W29—W40. http://dx.doi.org/10.1190/1.2208275.

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Low-frequency electromagnetic (EM) signal propagation in geophysical applications is sometimes referred to as diffusion and sometimes as waves. In the following we discuss the mathematical and physical approaches behind the use of the different terms. The basic theory of EM wave propagation is reviewed. From a frequency-domain description we show that all of the well-known mathematical tools of wave theory, including an asymptotic ray-series description, can be applied for both nondispersive waves in nonconductive materials and low-frequency waves in conductive materials. We consider the EM fi

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18

Kovaleva, L. A., R. R. Zinnatullin, V. N. Blagochinnov, A. A. Musin, Yu I. Fatkhullina, and Yu S. Zamula. "Destruction of water-in-oil emulsions in electromagnetic fields in a dynamic mode." Proceedings of the Mavlyutov Institute of Mechanics 9, no. 1 (2012): 110–15. http://dx.doi.org/10.21662/uim2012.1.021.

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Some results of experimental and numerical studies of the influence of radio-frequency (RF) and microwave (MW) electromagnetic (EM) fields on water-in-oil emulsions are presented. A detailed investigation of the dependence of the dielectric properties of emulsions on the frequency of the field makes it possible to establish the most effective frequency range of the EM influence. The results of water-in-oil emulsion stability in the RF EM field depending on their dielectric properties are presented. The effect of the MW EM field on the emulsion in a dynamic mode has been studied experimentally.

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Akyıldız, Aylin, and Ozer Durmaz. "Investigating Electromagnetic Shielding Properties of Building Materials Doped with Carbon Nanomaterials." Buildings 12, no. 3 (2022): 361. http://dx.doi.org/10.3390/buildings12030361.

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Electromagnetic (EM) shielding has become an essential element in the modern world alongside the increased use of electronic products and telecommunication equipment. We are surrounded by electromagnetic fields that have inevitably become formidable in our lives. It is possible to absorb EM waves by adding materials. Researches have focused the addition of different additives into the cement based mixture to increase the Electromagnetic (EM) shielding. This study aims to investigate the performance of carbon nanomaterial on mechanical, electromagnetic shielding properties of composite. Hence,

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20

Wang, Bochen, Zhenwei Guo, Jianxin Liu, Yanyi Wang, and Fansheng Xiong. "Geophysical Frequency Domain Electromagnetic Field Simulation Using Physics-Informed Neural Network." Mathematics 12, no. 23 (2024): 3873. https://doi.org/10.3390/math12233873.

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Simulating electromagnetic (EM) fields can obtain the EM responses of geoelectric models at different times and spaces, which helps to explain the dynamic process of EM wave propagation underground. EM forward modeling is regarded as the engine of inversion. Traditional numerical methods have certain limitations in simulating the EM responses from large-scale geoelectric models. In recent years, the emerging physics-informed neural networks (PINNs) have given new solutions for geophysical EM field simulations. This paper conducts a preliminary exploration using PINN to simulate geophysical fre

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Zhang, Hu, Jianqiong Zhang, Zigang Deng, et al. "Study on Electromagnetic Radiation Characteristics Based on HTS Maglev Levitation Test Line." Electronics 12, no. 8 (2023): 1776. http://dx.doi.org/10.3390/electronics12081776.

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As a new type of magnetic levitation train with the characteristics of self-stabilization and self-suspension, high-temperature superconducting magnetic levitation has developed to the test line research stage. In order to promote the rapid development of high-temperature superconducting magnetic levitation train engineering, and the main electromagnetic radiation sources are clarified by analyzing their working principles and structures. Then Ansoft Maxwell EM was used to build a 3D magnetic levitation train electromagnetic environment simulation model to simulate and predict the electromagne

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Amundsen, Lasse, Lars Løseth, Rune Mittet, Svein Ellingsrud, and Bjørn Ursin. "Decomposition of electromagnetic fields into upgoing and downgoing components." GEOPHYSICS 71, no. 5 (2006): G211—G223. http://dx.doi.org/10.1190/1.2245468.

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This paper gives a unified treatment of electromagnetic (EM) field decomposition into upgoing and downgoing components for conductive and nonconductive media, where the electromagnetic data are measured on a plane in which the electric permittivity, magnetic permeability, and electrical conductivity are known constants with respect to space and time. Above and below the plane of measurement, the medium can be arbitrarily inhomogeneous and anisotropic. In particular, the proposed decomposition theory applies to marine EM, low-frequency data acquired for hydrocarbon mapping where the upgoing com

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Lee, Ki Ha, and Ganquan Xie. "A new approach to imaging with low‐frequency electromagnetic fields." GEOPHYSICS 58, no. 6 (1993): 780–96. http://dx.doi.org/10.1190/1.1443464.

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We present a new method for interpreting electromagnetic (EM) data using ray tomography. Direct application of ray tomography to low‐frequency EM data is difficult because of the diffusive nature of the field. Diffusive EM fields can, however, be mathematically transformed to wavefields defined in a time‐like variable. The transform uniquely relates a field satisfying a diffusion equation in time, or in frequency, to an integral of the corresponding wavefield. If the corresponding wavefields can be computed from low‐frequency EM data, one should be able to interpret these data using techniques

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Mauriello, Paolo, and Domenico Patella. "Principles of probability tomography for natural‐source electromagnetic induction fields." GEOPHYSICS 64, no. 5 (1999): 1403–17. http://dx.doi.org/10.1190/1.1444645.

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The 3-D interpretation problem of natural‐source electromagnetic (EM) induction field data collected over a flat air‐earth boundary is dealt with using the concept of probability tomography. This paper presents a method to recognize the most probable localization of the induced electric charge accumulations across resistivity discontinuities and current channeling inside conductive bodies. We begin by writing the solutions for the electric (magnetic) ground surface EM field components in the frequency domain as a sum of elementary contributions, each resulting from a single induced‐charge (dip

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MacLennan, Kris, Marios Karaoulis, and André Revil. "Complex conductivity tomography using low-frequency crosswell electromagnetic data." GEOPHYSICS 79, no. 1 (2014): E23—E38. http://dx.doi.org/10.1190/geo2012-0531.1.

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The complex conductivity of partially saturated siliciclastic sediments can now be reasonably predicted through recently developed petrophysical models like the POLARIS model. However, classical crosswell-induced polarization tomography (using a galvanometric approach) is characterized by a poor sensitivity map far from the wells, and thus other methods should be analyzed for potential improvements. The presence of low-frequency ([Formula: see text]) polarization effects in earth porous materials noticeably increases the amplitude and decreases the phase of measured electromagnetic (EM) fields

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Seol, Soon Jee, Jung Hee Suh, Yoonho Song, Hee Joon Kim, and Ki Ha Lee. "The potential of fracture imaging using high‐frequency, single‐hole electromagnetic data." GEOPHYSICS 67, no. 4 (2002): 1087–94. http://dx.doi.org/10.1190/1.1500369.

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This paper presents an inversion scheme for high‐frequency electromagnetic (EM) data from a single borehole for detection and characterization of fluid‐filled fractures. Water in the fracture zone may be characterized by its high electrical permittivity and, if saline, by high electrical conductivity. High electrical conductivity results in increased attenuation of EM fields, whereas high electrical permittivity reduces the phase velocity of propagating EM fields. Taking advantage of these effects, we use high‐frequency EM fields to detect and characterize fluid‐filled fractures. To demonstrat

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Fedosin, Sergey G. "Relativistic energy and mass in the weak field limit." Jordan Journal of Physics 8, no. 1 (2015): 1–16. https://doi.org/10.5281/zenodo.889210.

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Within the framework of the covariant theory of gravitation (CTG) the energy is calculated for a system with continuously distributed matter, taking into account the contribution of the gravitational and electromagnetic fields and the contribution of the pressure and acceleration fields. The total energy of all the fields is equal to zero, and the system’s energy is formed from the energy of the particles, which are under the influence of these fields. From the expression for the energy the inertial <em>M</em> and gravitational <em>m<sub>g</sub></em> masses of the system are found. These masse

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Alanis, Paul Karson, Yoichi Sasai, and Toshiyasu Nagao. "Electromagnetic Observations at Taal Volcano." Journal of Disaster Research 10, no. 1 (2015): 99–105. http://dx.doi.org/10.20965/jdr.2015.p0099.

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The electromagnetic (EM) method first applied to monitor the activity of the Taal Volcano from 2005 consists of repeatedly surveying total magnetic intensity (TMF) and continuously measuring EM fields. The EM observation system was greatly improved through the SATREPS project summarized in this paper. The resistivity structure is investigated in the project using the magnetotelluric (MT) method. The MT method revealed a large hydrothermal reservoir just beneath the center of Volcano Island. The existence of this reservoir explains several things – the special features of the devastating 1911 e

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Gao, Yang, Bin Zhou, Yi He, and Wan Jing He. "Electromagnetic Compatibility Analysis Method for FBAR Devices." Applied Mechanics and Materials 719-720 (January 2015): 452–60. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.452.

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With the increasing of resonant frequency and integration of film bulk acoustic resonator (FBAR), the electromagnetic interference (EMI) of FBAR devices appears to be extremely important. The electric fields of the common electrical model and finite element model are assumed to be quasi-static and cannot simulate the electromagnetic (EM) property. A 3-D EM model of FBAR is achieved by means of high frequency EM simulation software HFSS. A real-time simulation of EM distributed effects, EM coupling and piezoelectric effects is achieved by employing an effective permittivity in the EM model. The

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Yang, Wei, Carlos Torres-Verdín, Junsheng Hou, and Zhiyi (Ian) Zhang. "1D subsurface electromagnetic fields excited by energized steel casing." GEOPHYSICS 74, no. 4 (2009): E159—E180. http://dx.doi.org/10.1190/1.3131382.

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We use numerical simulations to investigate the possibility of enabling steel-cased wells as galvanic sources to detect and quantify spatial variations of electrical conductivity in the subsurface. The study assumes a vertical steel-cased well that penetrates electrically anisotropic horizontal layers. Simulations include a steel-cased vertical well with a finite-length thin wire of piecewise-constant electric conductivity and magnetic permeability. The steel-cased well is energized at the surface or within the borehole at an arbitrary depth with an electrode connected to a current source of v

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Duan, B. Y., H. Qiao, and L. Z. Zeng. "The Multi-Field-Coupled Model and Optimization of Absorbing Material's Position and Size of Electronic Equipments." Journal of Mechatronics and Applications 2010 (August 9, 2010): 1–6. http://dx.doi.org/10.1155/2010/569529.

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There are three fields in electronic equipment such as structure deformation (S), temperature (T), and electromagnetic (EM) fields. Both deformation and temperature will affect the electromagnetic shielding performance of the equipment considerably, particularly in the case of enclosure with small volume and high packaging density. Because the position of electronic device and the shape of outlet will be changed with structural deformation, there must be therefore an adherent relationship among three fields. To begin with, this paper presents a three-field-coupled model called STEM. Then, to e

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RAZMI, H., and AMIR H. ABBASSI. "THE FUNDAMENTAL COMMUTATOR FOR MASSLESS PARTICLES." Modern Physics Letters A 15, no. 33 (2000): 2027–36. http://dx.doi.org/10.1142/s0217732300002589.

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It is discussed that the usual Heisenberg commutation relation (CR) is not a proper relation for massless particles and that an alternative is obtained. The canonical quantization of the free electromagnetic (EM) fields based on the field theoretical generalization of this alternative is carried out. Without imposing the normal ordering condition, the vacuum energy is automatically zero. This can be considered as a solution to the EM fields vacuum catastrophe and a step toward managing the cosmological constant problem at least for the EM fields contribution to the state of vacuum.

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Abramek, Milena Ilona, Joanna Kozieł, and Paweł Mazurek. "Design of a test stand for real values of electromagnetic field levels emitted by a mobile phone during a telephone conversation." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 12 (2018): 37–42. http://dx.doi.org/10.24136/atest.2018.350.

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The paper presents a conceptual design of a laboratory station for measuring the intensity of electromagnetic fields emitted during conversations by mobile phones. A significant part of our society's population is increasingly using cellular telephones. Among them are vehicle drivers who use mobile phones or smartphones more and more often for travel communication and logistics purposes. The use of this type of electronic device carries some risk of exposure to electromagnetic fields (EM). The article presents the results of experimental research on randomly chosen cell phones from the years 2

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Cifra, Michal, Francesca Apollonio, Micaela Liberti, Tomás García-Sánchez, and Lluis M. Mir. "Possible molecular and cellular mechanisms at the basis of atmospheric electromagnetic field bioeffects." International Journal of Biometeorology 65, no. 1 (2020): 59–67. http://dx.doi.org/10.1007/s00484-020-01885-1.

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AbstractMechanisms of how electromagnetic (EM) field acts on biological systems are governed by the same physics regardless of the origin of the EM field (technological, atmospheric...), given that EM parameters are the same. We draw from a large body of literature of bioeffects of a man-made electromagnetic field. In this paper, we performed a focused review on selected possible mechanisms of how atmospheric electromagnetic phenomena can act at the molecular and cellular level. We first briefly review the range of frequencies and field strengths for both electric and magnetic fields in the at

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Vasilij, Sidor, Usatiuk Svitlana, Tyshchenko Olena, and Baranovska Iryna. "Study of the effect of electromagnetic field and radiation on the intensification of brewing processes." Technology audit and production reserves 2, no. 3(58) (2021): 44–46. https://doi.org/10.15587/2706-5448.2021.230367.

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<em>The object of research is the enzymatic preparations Termamil and San-Super, malt and yeast. One of the most problematic places is that the action of the magnetic field and radiation can both stimulate the amylase activity of barley malt and cause its deactivation.</em> <em>During the study, a certain number of electrophysical factors were used, namely: laser radiation, which was carried out using a helium-neon laser, ultraviolet radiation – using a nitrogen gas laser, X-rays, a constant uniform magnetic field, ultrasound.</em> <em>Results have been obtained that confirm the positive

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Xiong, Zonghou. "Electromagnetic fields of electric dipoles embedded in a stratified anisotropic earth." GEOPHYSICS 54, no. 12 (1989): 1643–46. http://dx.doi.org/10.1190/1.1442633.

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The anisotropy of electrical conductivity in earth formations may be caused by crystal anisotropies of minerals, as well as by minilayers which occur frequently in sedimentary environments. The effects of anisotropy on the propagation of electromagnetic (EM) fields have been studied by many geophysicists. For instance, Kong (1972) and Wait (1981) solved the EM propagation problem for vertically anisotropic layered earths; O’Brien and Morrison (1967), for a horizontally anisotropic multilayer half‐space; Chetayev (1960), as well as Reddy and Rankin (1971), for media of dipping anisotropies; and

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D., V. Lavinsky, and I. Zaitsev Yu. "Computational analysis method of the electromagnetic field propagation and deformation of conductive bodies." Electrical Engineering & Electromechanics 2023, no. 5 (2023): 77–82. https://doi.org/10.20998/2074-272X.2023.5.11.

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<strong><em>Introduction. </em></strong><em>The electromagnetic field is an integral attribute of the operation of many technical and technological systems. The action of an electromagnetic field leads to deformation, a change in temperature, a change in the physical properties of the materials.<strong> Problem. </strong>High-intensity electromagnetic fields can cause such a strong deformation of conductive bodies that it can lead to irreversible shape change or destruction. This fact is used in a class of technological operations: electromagnetic forming. Here, both the workpie

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Kumari, Suman, Jasvir Dalal, Anand Kumar, Rishi Pal, Ritu Chahal, and Anil Ohlan. "Enhanced microwave absorption properties of conducting polymer@graphene composite to counteract electromagnetic radiation pollution: green EMI shielding." RSC Advances 14, no. 1 (2024): 662–76. http://dx.doi.org/10.1039/d3ra07245b.

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Conducting polymers have been thoroughly investigated and found to have extensive applications in the fields of microwave absorption and electromagnetic (EM) shielding owing to their distinctive characteristics and adaptability.

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Alexeyeva, Lyudmila, and Aziz Gulfariza. "TRANSPORT SOLUTIONS O MAXWELL EQUATIONS AT SUB-LIGHT SPEEDS IN BIQUATERNION REPRESENTATION." JOURNAL OF THE OPEN SYSTEMS EVOLUTION PROBLEMS 26, no. 1 (2024): 64–73. http://dx.doi.org/10.26577/jpeos.2024.v26.i1-i6.

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The most common movable radiation sources of electromagnetic waves among the operating ones located on the platforms of various vehicles. It is obvious that the speed of movement affects the processes of wave propagation in an environment with such electrical conductivity and magnetic permeability, as does the shape of the source itself and the nature of its operation. In this work are constructed and studied transport solutions of the biquaternion wave equation, which is a biquaternion generalization of Maxwell's equations. These equations describe the electromagnetic fields of emitters of el

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Vladimir, Grunskiy, Kalmykov Sergey, and Kalmykova Yuliya. "Features of the application of electromagnetic bioresonant therapy of inflammatory infectious diseases." Slobozhanskyi Herald of Science and Sport 7, no. 5(73) (2019): 31–34. https://doi.org/10.5281/zenodo.3596547.

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<strong><em>Purpose:</em></strong><em> to develop an apparatus and method for electromagnetic bioresonance therapy of inflammatory infectious diseases.</em><em> </em> <strong><em>Material & Methods:</em></strong><em> analysis of scientific and medical literature and information sources on the coverage of the influence of electromagnetic fields on biological objects, systematization and generalization of the results on the research topic. </em> <strong><em>Results:</em></strong><em> an apparatus and method for electromagnetic bioresonance therapy with the determination of the frequency of n

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Orujov, Gurban, Ethan Anderson, Rita Streich, and Andrei Swidinsky. "On the electromagnetic response of complex pipeline infrastructure." GEOPHYSICS 85, no. 6 (2020): E241—E251. http://dx.doi.org/10.1190/geo2020-0050.1.

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Controlled-source electromagnetics (CSEM) can be used to image subsurface resistivity and add value in petroleum exploration. However, the application of CSEM methods can be particularly challenging in mature oil and gas fields, where the presence of steel casings and complex seabed infrastructure may influence electromagnetic (EM) fields. The effect of this metal infrastructure can be modeled using the method of moments (MoM), which has previously been demonstrated to be effective in simple situations. We have now developed a methodology for modeling the EM response of complex pipeline geomet

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Barclay, Bryce M., Eric J. Kostelich, and Alex Mahalov. "Vectorial EM Propagation Governed by the 3D Stochastic Maxwell Vector Wave Equation in Stratified Layers." Atmosphere 14, no. 9 (2023): 1451. http://dx.doi.org/10.3390/atmos14091451.

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The modeling and processing of vectorial electromagnetic (EM) waves in inhomogeneous media are important problems in physics and engineering, and new methods need to be developed to incorporate novel vector sensor technology. Vectorial phenomena of EM waves in stratified atmospheric layers can be incorporated into governing equations by retaining the gradient of the refractive index when deriving the Maxwell Vector Wave Equation (MVWE) from Maxwell’s equations. The MVWE, as opposed to the scalar wave, Helmholtz, and paraxial equations, couples the EM field components in inhomogeneous media and

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Gong, Ming, Shou-Guang Sun, Lin Sun, Ai-Qin Tian, and Qiang Li. "Simulation and experimentation of wide frequency electromagnetic shielding coating used for carbon fiber composite materials of track vehicles." International Journal of Modern Physics B 33, no. 01n03 (2019): 1940020. http://dx.doi.org/10.1142/s0217979219400204.

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Computer Simulation Technology EM and Computer Simulation Technology Microwave Studio electromagnetic simulation software were used to simulate the carbon fiber composite materials with a new type of wide frequency electromagnetic shielding coating. DC magnetic field, low-frequency electromagnetic fields, and mid-high frequency electromagnetic shielding effectiveness analysis model were established in order to study the influence of permeability, conductivity, coating thickness and other parameters in the typical frequency range research on the shielding effectiveness. The results show that th

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Kovaleva, L. A., Z. Yu Stepanova, I. M. Kamaltdinov, and Yu S. Zamula. "The influence of radiofrequency electromagnetic fields on the adsorption processes in porous media." Proceedings of the Mavlyutov Institute of Mechanics 9, no. 2 (2012): 71–75. http://dx.doi.org/10.21662/uim2012.2.052.

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The experimental results of the polar hydrocarbon adsorption in saturated porous media after radio-frequency (RF) electromagnetic (EM) influence and the thermal heating for comparison are presented. Temperature dependences of the extracted volume of hydrocarbons from models are shown. Comparing the obtained data an additional influence of RF EM field on the desorption of asphaltenes from the porous media surface has been found, that leads to an increase of the extraction of hydrocarbons from the models. The thermodynamic substantiation and mathematical modeling of heat and mass transfer in a s

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Chang, Fon-Chieh, and John R. Hull. "Computer Modeling of Electromagnetic Fields and Fluid Flows for Edge Containment in Continuous Casting." Journal of Manufacturing Science and Engineering 127, no. 4 (2004): 724–30. http://dx.doi.org/10.1115/1.2039101.

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A computer model was developed to predict eddy currents and fluid flows in molten steel. The model was verified by comparing predictions with experimental results of liquid-metal containment and fluid flow in electromagnetic (EM) edge dams (EMDs) designed at Inland Steel (Ispat Industries Ltd.) for twin-roll casting. This mathematical model can greatly shorten casting research on the use of EM fields for liquid metal containment and control. It can also optimize the existing casting processes and minimize expensive, time-consuming full-scale testing. The model was verified by comparing predict

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Ignatov, Ignat, Fabio Huether, Paunka Vassileva, Mario T. Iliev, Alexander I. Ignatov, and Chavdar Stoyanov. "ASSESSMENT OF USING WATER OBTAINED THROUGH EVODROP TECHNOLOGY EXPOSED TO ELECTROMAGNETIC WAVES ON CONCRETE PROPERTIES BASED ON FT-IR AND SEM ANALYSES." Journal of Chemical Technology and Metallurgy 59, no. 5 (2024): 1075–82. http://dx.doi.org/10.59957/jctm.v59.i5.2024.9.

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Various methods are applied to improve the quality of cement and concrete. Many efforts are made to enhance their quality by introducing additional compounds that can stabilize the chemical bonds between their components. Significant effects on hydrogen bonds under the influence of magnetic and electromagnetic waves have been observed. Results have been published with permanent magnetic fields for water treatment for concrete preparation with magnetic inductions B = 4000, 6000, 6000, 9000, and 9250 Gauss. Electromagnetic (e. m.) treated water has emerged as a promising approach for improving t

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Juan, Carlos Olivares Rojas, Reyes Archundia Enrique, Antonio Gutiérrez Gnecchi José, et al. "Data Analytics of Electromagnetics Field Measurements in Smart Meters." International Journal of Combinatorial Optimization Problems and Informatics 11, no. 2 (2020): 39–45. https://doi.org/10.5281/zenodo.4625527.

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<em>The smart meters are considered the main component of the smart grid allowing communication and processing of electrical energy measurement data to utilities. Nowadays, there is a great concern that smart meters' data which is communicated mainly by wireless or wired communication means produce electromagnetic fields which be harmful to human health.  In this work, a study of data analytics is presented on the readings produced by the smart meters made with statistical and machine learning probabilistic techniques in order to compare the data with reference values and determine if

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Luan, Pi-Gang. "Effective Electrodynamics Theory for the Hyperbolic Metamaterial Consisting of Metal–Dielectric Layers." Crystals 10, no. 10 (2020): 863. http://dx.doi.org/10.3390/cryst10100863.

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In this work, we study the dynamical behaviors of the electromagnetic fields and material responses in the hyperbolic metamaterial consisting of periodically arranged metallic and dielectric layers. The thickness of each unit cell is assumed to be much smaller than the wavelength of the electromagnetic waves, so the effective medium concept can be applied. When electromagnetic (EM) fields are present, the responses of the medium in the directions parallel to and perpendicular to the layers are similar to those of Drude and Lorentz media, respectively. We derive the time-dependent energy densit

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Demirhan, Osman. "Genotoxic Effects of Radiofrequency-Electromagnetic Fields." Journal of Toxicology and Environmental Sciences 1, no. 1 (2021): 9–12. http://dx.doi.org/10.55124/jtes.v1i1.50.

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Genotoxic Effects of Radiofrequency-Electromagnetic Fields. IntroductionRadiation is energy emission in the form of electromagnetic waves emitted from the solar system and natural resources on earth. The currents produced by the elementary particles formed by the electric current create the magnetic field. Earth's surface is under the influence of the geomagnetic field emanating from the sun. However, the outer liquid also has a magnetic field created as a result of heat transfer in the core. Therefore, all living organisms on earth live under the influence of electromagnetic fields (EMF

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Misek, J., T. Laukova, M. Kohan, M. Veternik, V. Jakusova, and J. Jakus. "Measurement of Low-level radiofrequency electromagnetic fields in the human environment." Acta Medica Martiniana 18, no. 2 (2018): 27–33. http://dx.doi.org/10.2478/acm-2018-0010.

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Abstract In recent years there has been an increase in development of electromagnetic (EM) technology in the telecommunication industry, resulting in an increase in human non-ionizing exposure. This fact has initiated a number of scientific studies on possible health effects of EM fields on human organism. Totally four representative microenvironments were investigated for RF EM fields distribution, namely: city center, residential area, rural area, and extra-village area. Each microenvironment was measured 20 times in accordance with the International Commission for Non-Ionizing Radiation Pro

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