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Journal articles on the topic 'Electromagnetism'

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Published: 4 June 2021
Last updated: 30 July 2024

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1

Doria, Renato, J. Chauca, and I. Soares. "Four Bosons Electromagnetism." JOURNAL OF ADVANCES IN PHYSICS 10, no. 1 (August 5, 2015): 2610–40. http://dx.doi.org/10.24297/jap.v10i1.1341.

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Based on light invariance and electric conservation a four bosons electromagnetism is proposed. It enlarges the electric charge conservation beyond displacement current and Dirac charge to a new physical situation where the electromagnetic phenomena is mediated by the usual photon plus a massive photon and two additional charged vector bosons.Considering the enlarged abelian gauge symmetry U(1) SO(2) transforming under a same gauge parameter a non-linear electromagnetism involving four bosons is introduced. It deploys a Lagrangian containing massless, massive and charged elds with three and four vector bosons interactions. The corresponding Noether's relations and classical equations of motion are studied. They provide a whole dynamics involving granular, collective terms through antisymmetric and symmetric sectors. It develops a new photon equation which extends the Maxwell's one. Self interacting photons are obtained.A four boson electromagnetic ux is derived. It expresses an electromagnetism transfering 4Q = 0 and j4Qj = 1, not more limited to just a massless photon. There is a new electromagnetic owing to be understood, where aside of electric charge conservation, it appears a neutral electromagnetism. There are six neutral electromagnetic charges beyond electric charge as consequences from non-linearity. Two are derived from the second Noether identity and four from variational continuity equations. An electromagnetic ux being conducted by a whole physics is generated. Based on elds set, it develops a determinism under the meaning of directive and circumstance. Interpreting that, light invariance concises the photon as directive, the photon becomes a whole maker. It assumes the symmetry command which will control the conservations laws and opportunities. Consequently, one combines the symmetry equation derived fromNoether theorem with the four equations derived from variational principle, and an effective photon equation is obtained. A kind of Navier-Stokes electromagnetic ow is derived. It yields a four bosons electromagnetism preserving electric charge conservation plus introducting the meaning of chance through symmetry management.
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2

Bezen, Sevim, Işıl Aykutlu, and Celal Bayrak. "An Examination of the Relationship between High School Students’ Self-efficacy Perceptions Concerning Electromagnetism and Their Academic Success." SHS Web of Conferences 48 (2018): 01049. http://dx.doi.org/10.1051/shsconf/20184801049.

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In the study, “Magnetism and Electromagnetic Induction” topic, which is part of the unit titled Electricity and Magnetism within the 11th grade Physics program that came into effect in 2013. In this study that aims to examine the relationship between high school students’ self-efficacy perceptions concerning electromagnetism and their academic success, study group consists of students who are enrolled at the 11th grade of Anatolian high schools in Ankara. Selection criterion was that students have completed covering “Magnetism and Electromagnetic Induction” topic. Within the scope of the study, answers to following questions were sought: “What is the self-efficacy level of 11th-grade students concerning electromagnetism?”, “What is the academic success levels of 11th grade students concerning electromagnetism?” and “Is there a meaningful relationship between students’ perception of self-efficacy concerning electromagnetism and their academic success?”. At the end of the study, it was revealed that students experience problems with electromagnetism, and thus they do not have a high perception of self-efficacy.
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3

Osorio-Vélez, Beatriz Elena, Jaime Alberto Osorio-Velez, Luz Stella Mejía-Aristizabal, Gloria Eugenia Campillo-Figueroa, and Rodrigo Covaleda. "El papel de la actividad experimental en la enseñanza y aprendizaje del electromagnetismo en la educación superior -The results of the research are presented: "The role of experimental activity in teaching electromagnetics in higher education." Revista Científica 2, no. 22 (October 10, 2015): 85. http://dx.doi.org/10.14483/10.14483/udistrital.jour.rc.2015.22.a7.

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Se presentan los resultados del proyecto de investigación: “El papel de la actividad experimental en la enseñanza del electromagnetismo en la educación superior”. Su objetivo fue diseñar una propuesta de enseñanza del electromagnetismo, basada en la actividad experimental que contribuya con el proceso enseñanza y aprendizaje a nivel universitario. Para ello se trabajó con un grupo de estudiantes de ingeniería de dos instituciones de Educación Superior: Institución Universitaria Pascual Bravo y la Universidad de Antioquia. Los estudiantes que hicieron parte de la propuesta, respondieron un cuestionario de cuatro preguntas sobre electromagnetismo. Las preguntas fueron seleccionadas de acuerdo a investigaciones previas que sobre el mismo tema se realizaron en estudiantes que solamente habían realizado el curso teórico. Los resultados de este último grupo, evidenció dificultades para explicar fenómenos relacionados con el electromagnetismo, mientras que el grupo de estudiantes que realizó el trabajo experimental, mostró una mejor comprensión del fenómeno, logrando estructurar y organizar sus explicaciones.ABSTRACT The results of the research are presented: "The role of experimental activity in teaching electromagnetics in higher education." Their goal was to design a proposal for teaching electromagnetism, based on the experimental activity that contributes to the teaching and learning process at the university level. To do this, we worked with a group of engineering students from two institutions of higher education: University Pascual Bravo Institute and the University of Antioquia. Students who were part of the proposal, a questionnaire of four questions on electromagnetism. The questions were selected based on previous research on the same topic were conducted in students who had just completed the theoretical course. The results of the latter group showed difficulty explaining phenomena related to electromagnetism, while the group of students who performed the experimental work, showed a better understanding of the phenomenon, managing to structure and organize their explanations.
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4

JO, Kwang Hee. "Supermarket as a Treasure Trove of Teaching Aids for Electromagnetism." Physics and High Technology 32, no. 10 (October 31, 2023): 15–18. http://dx.doi.org/10.3938/phit.32.027.

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One of the reasons why electromagnetism is difficult to learn is that the fundamental elements of electromagnetic phenomena are invisible. In addition, there are relatively few teaching aids for university-level electromagnetism lectures compared to elementary and secondary schools. This article is about my experience of making teaching aids, easily purchased at supermarkets, and using it in college lectures. I hope these attempts will be helpful in electromagnetism education.
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5

Xiong, Guang Jie, and Ling Li. "Finite Element Analysis of Electromagnetic Device in Magnetorheological Fluid Brake." Applied Mechanics and Materials 268-270 (December 2012): 1448–52. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.1448.

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Magnetorheological fluid (MRF) Brake is a newly-developed intelligent brake in which traditional mechanical brake friction pairs are replaced by MRF materials and the electromagnetism devices are very important components. The controllable magnetic fields are generated by electromagnetism devices which can make MRF materials create related braking torque to control the braking performance of the MRF Brake. In this paper, the electromagnetism device consists of several coil sets which can generate electromagnetic fields for MRF Brake. By using finite element analysis, the magnetic fields generated by electromagnetism devices are compared analytically under the different conditions, and then the optimum parameters are obtained such as coil arrangements, excitation currents and air gap distances and etc. All these evidences are helpful to design the structure of electromagnetism devices in MRF Brake.
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6

Bajpai, Shrish, Siddiqui Sajida Asif, and Syed Adnan Akhtar. "Electromagnetic Education in India." Comparative Professional Pedagogy 6, no. 2 (June 1, 2016): 60–66. http://dx.doi.org/10.1515/rpp-2016-0020.

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Abstract Out of the four fundamental interactions in nature, electromagnetics is one of them along with gravitation, strong interaction and weak interaction. The field of electromagnetics has made much of the modern age possible. Electromagnets are common in day-to-day appliances and are becoming more conventional as the need for technology increases. Electromagnetism has played a vital role in the progress of human kind ever since it has been understood. Electromagnets are found everywhere. One can find them in speakers, doorbells, home security systems, anti-shoplifting systems, hard drives, mobiles, microphones, Maglev trains, motors and many other everyday appliances and products. Before diving into the education system, it is necessary to reiterate its importance in various technologies that have evolved over time. Almost every domain of social life has electromagnetic playing its role. Be it the mobile vibrators you depend upon, a water pump, windshield wipers during rain and the power windows of your car or even the RFID tags that may ease your job during shopping. A flavor of electromagnetics is essential during primary level of schooling for the student to understand its future prospects and open his/her mind to a broad ocean of ideas. Due to such advancements this field can offer, study on such a field is highly beneficial for a developing country like India. The paper presents the scenario of electromagnetic education in India, its importance and numerous schemes taken by the government of India to uplift and acquaint the people about the importance of EM and its applications.
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7

Ibbotson, L. "The Fundamentals of Electromagnetism Revisited." International Journal of Electrical Engineering & Education 33, no. 1 (January 1996): 5–7. http://dx.doi.org/10.1177/002072099603300102.

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The fundamentals of electromagnetism revisited In this note the author attempts to articulate the theoretical model of electromagnetism used by electrical engineers. Despite the success of this model, physicists persist in using a different, and in the author's opinion, inferior, model to explain macroscopic electromagnetic phenomena.
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8

Tartaglia, A., and M. L. Ruggiero. "Gravito-electromagnetism versus electromagnetism." European Journal of Physics 25, no. 2 (December 4, 2003): 203–10. http://dx.doi.org/10.1088/0143-0807/25/2/007.

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9

Zong, Shiqi, Chaoqun Jiao, Jiangong Zhang, and Zheyuan Gan. "Research on electromagnetism scattered from electricity power supply towers based on orthogonal test designs." Journal of Physics: Conference Series 2797, no. 1 (July 1, 2024): 012017. http://dx.doi.org/10.1088/1742-6596/2797/1/012017.

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Abstract For the protection of transmission towers against electromagnetism interference to peripheral radio radar stations, this paper designs orthogonal tests to investigate the electromagnetism scattered efficiency of UHV transmission towers. The towers were mathematically modeled, and the influence of three main factors, tower spacing, frequency, and number of transmitting pylons, on the electromagnetism scattered is investigated. Each factor corresponds to three levels of study and nine sets of orthogonal tests were designed to greatly simplify the number of simulations. Three-factor analysis of variance was undertaken on test data and demonstrated that frequency was the main factor affecting electromagnetic scattering, with tower spacing being the next most influential and many towers the least influential. With the main and secondary effects in mind, the combination with the most significant effect of interaction effects on electromagnetic scattering was selected as the five towers with frequency 1400 kHz and tower spacing 200 m. The investigated outcomes lay the foundation and supply instructions for multi-factor analyses of electromagnetic scattering.
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10

Hammond, Richard T. "Topological interaction of electromagnetism and torsion." Modern Physics Letters A 33, no. 03 (January 29, 2018): 1850021. http://dx.doi.org/10.1142/s0217732318500219.

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A fully gauge-invariant topological coupling of torsion to the electromagnetic field is examined. It is shown, while the gravitational fields are unaltered, torsion may serve as a source for electromagnetism and electromagnetism may serve as a source for torsion. Unlike most couplings, this gives rise to conservation of charge, no magnetic monopoles, and is in agreement with the principle of equivalence.
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11

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 electromagnetic energy is obtained. The fields quadruplet {Aµ, Uµ, Vµ±} are the porters of electromagnetic energy. They are the usual photon Aµ, massive photon Uµ and two charged photons Vµ±, A new understanding on EM phenomena has to be considered. A set determinism based on granular and collective fields is developed. A space-time evolution associated to a whole.Conservation laws are studied. The EM phenomena is enlarged to three charges interchanges to {+, 0, −}. Two novelties appear. New features on nonlinear fields acting as own sources and on electric charge physics. Properties as conservation, conduction, transmission, interaction are extended to a systemic electromagnetism. A whole conservation law for electric charge emerges from three charges interwoven. Electric charge has a systemic behavior. Although there is no Coulomb law for zero electric charge, the Four Bosons Electromagnetism contains an EM energy which provides a neutral electromagnetism. Particles with zero charge {Aµ, Uµ} are carrying EM energy. Another consideration is on EM energy being transported by four nonlinear fields. A new physicality appears. The abelian nonlinearity generates fields charges. Fields are working as own sources through mass terms, trilinear and quadrilinear interactions, spin couplings. Consequently the photon is more than being a consequence from electric charge oscillations. It is able to generate its own charge. Introduce the meaning of photonics.Thus, electric charge is no more the isolate electromagnetic source. There are another conservation laws. Fields sources appear through corresponding equations of motion, Bianchi identities, energy-momentum, Noether laws and angular momentum conservation laws. They move EM to a fields charges dependence. Together with electric charge they carrythe electromagnetic flux. Supporting the Ahranov-Bohm experiment of potential fields as primitive entities.
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12

Alves, Daniel W. F., Carlos Hoyos, Horatiu Nastase, and Jacob Sonnenschein. "Knotted solutions, from electromagnetism to fluid dynamics." International Journal of Modern Physics A 32, no. 33 (November 30, 2017): 1750200. http://dx.doi.org/10.1142/s0217751x17502001.

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Knotted solutions to electromagnetism and fluid dynamics are investigated, based on relations we find between the two subjects. We can write fluid dynamics in electromagnetism language, but only on an initial surface, or for linear perturbations, and we use this map to find knotted fluid solutions, as well as new electromagnetic solutions. We find that knotted solutions of Maxwell electromagnetism are also solutions of more general nonlinear theories, like Born–Infeld, and including ones which contain quantum corrections from couplings with other modes, like Euler–Heisenberg and string theory DBI. Null configurations in electromagnetism can be described as a null pressureless fluid, and from this map we can find null fluid knotted solutions. A type of nonrelativistic reduction of the relativistic fluid equations is described, which allows us to find also solutions of the (nonrelativistic) Euler’s equations.
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13

Huang, XiuLin, Yan Xu, and ChengZhi Liu. "An attempt to geometrize electromagnetism." Open Physics 16, no. 1 (December 31, 2018): 848–53. http://dx.doi.org/10.1515/phys-2018-0106.

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AbstractThis study investigates the curved worldline of a charged particle accelerated by an electromagnetic field in flat spacetime. A new metric, which dependes on the charge-to-mass ratio and electromagnetic potential, is proposed to describe the curve characteristic of the world-line. The main result of this paper is that an equivalent equation of the Lorentz equation of motion is put forward based on a 4-dimensional Riemannian manifold defined by the metric. Using the Ricci rotation coefficients, the equivalent equation is self-consistently constructed. Additionally, the Lorentz equation of motion in the non-inertial reference frames is studied with the local Lorentz covariance of the equivalent equation. The model attempts to geometrize classical electromagnetism in the absence of the other interactions, and it is conducive to the establishment of the unified theory between electromagnetism and gravitation.
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14

Chadha-Day, Francesca. "Axion-like particle oscillations." Journal of Cosmology and Astroparticle Physics 2022, no. 01 (January 1, 2022): 013. http://dx.doi.org/10.1088/1475-7516/2022/01/013.

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Abstract String theory compactifications may generate many light axion-like particles (ALPs) with weak couplings to electromagnetism. In general, a large number of ALPs may exist, with a linear combination having a potentially observable coupling to electromagnetism. The basis in which only one ALP couples to electromagnetism is in general misaligned with the mass basis. This leads to mixing between the `electromagnetic' ALP and a number of `hidden' ALPs that do not interact directly with the photon. The process is analagous to neutrino oscillations. I will discuss the phenomenological consequences of this mixing for astrophysical ALP signals, in particular showing that it may significantly reduce the predicted signal in experiments such as the CERN Axion Solar Telescope.
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15

Pollack, Gerald L., Daniel R. Stump, and Colin Inglefield. "Electromagnetism." American Journal of Physics 73, no. 6 (June 2005): 574. http://dx.doi.org/10.1119/1.1891171.

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16

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 (February 23, 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 yields a branch with transversal and longitudinalEM fields, granular and collective sectors, I-fields layers and four regimes (photonic, massive,neutral, charged) connected through a global photon. Their relationships are determined by astate equation identified as Global Maxwell equation. It contains new Gauss and Ampere laws,exclusive Faraday law for polarization and magnetization vectors, divergenceless magnetizationvector having fields as sources, self-interacting photons mediated by a dimensionless couplingconstant and other features. It is complemented by a Global Lorentz equation which besidesthe usual Lorentz force add forces depending on mass and on potential fields.
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17

GOULART, E., and F. T. FALCIANO. "FORMAL ANALOGIES BETWEEN GRAVITATION AND ELECTRODYNAMICS." International Journal of Modern Physics A 24, no. 24 (September 30, 2009): 4589–605. http://dx.doi.org/10.1142/s0217751x0904628x.

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We develop a theoretical framework that allows us to compare electromagnetism with gravitation in a fully covariant way. This new scenario does not rely on any kind of approximation nor associate objects with different operational meaning as it is sometimes done in the literature. We construct the electromagnetic analogue to Riemann and Weyl tensors and develop the equations of motion for these objects. In particular, we are able to identify precisely how and in what conditions gravity can be mapped to electrodynamics. As a consequence, many of the geometrical tools of General Relativity can be applied to electromagnetism and vice versa. We hope our results would shed new light in the nature of electromagnetic and gravitational theories.
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18

Fukai, J., and A. KT Assis. "Testing Mach's principle in electrodynamics." Canadian Journal of Physics 81, no. 11 (November 1, 2003): 1239–42. http://dx.doi.org/10.1139/p03-094.

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19

Torres-Sanchez, Horacio. "The epistemological obstacle in Electromagnetism." DYNA 88, no. 218 (July 29, 2021): 39–42. http://dx.doi.org/10.15446/dyna.v88n218.88975.

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In the development of a historical analysis on the natural phenomenon of electromagnetism, recurrently a question appears on the subject: why does it take researchers about 2300 years to decipher, understand and then dominate and apply the electromagnetic phenomenon for the benefit of the human being? To answer this question, the hypothesis about Bacon's “idols” and Bachelard's epistemological obstacle are presented. Both posed very correctly about the theory of knowledge: the limitations or impediments that affect the ability of individuals to build new knowledge. The fascinating interpretations, myths and legends, even the scientific understanding and its technological applications that changed life on earth, have been compiled and analyzed in this article, and in the Torres´s book [18]: “The enigma of Electromagnetism under the magnifying glass"
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POPŁAWSKI, NIKODEM J. "GRAVITATION, ELECTROMAGNETISM AND THE COSMOLOGICAL CONSTANT IN PURELY AFFINE GRAVITY." International Journal of Modern Physics D 18, no. 05 (May 2009): 809–29. http://dx.doi.org/10.1142/s0218271809014777.

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The Eddington Lagrangian in the purely affine formulation of general relativity generates the Einstein equations with the cosmological constant. The Ferraris–Kijowski purely affine Lagrangian for the electromagnetic field, which has the form of the Maxwell Lagrangian with the metric tensor replaced by the symmetrized Ricci tensor, is dynamically equivalent to the Einstein–Maxwell Lagrangian in the metric formulation. We show that the sum of the two affine Lagrangians is dynamically inequivalent to the sum of the analogous Lagrangians in the metric–affine/metric formulation. We also show that such a construction is valid only for weak electromagnetic fields. Therefore the purely affine formulation that combines gravitation, electromagnetism and the cosmological constant cannot be a simple sum of terms corresponding to separate fields. Consequently, this formulation of electromagnetism seems to be unphysical, unlike the purely metric and metric–affine pictures, unless the electromagnetic field couples to the cosmological constant.
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21

de Araujo Duarte, Celso. "The classical geometrization of the electromagnetism." International Journal of Geometric Methods in Modern Physics 12, no. 09 (October 2015): 1560022. http://dx.doi.org/10.1142/s0219887815600221.

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Following the line of the history, if by one side the electromagnetic theory was consolidated on the 19th century, the emergence of the special and the general relativity theories on the 20th century opened possibilities of further developments, with the search for the unification of the gravitation and the electromagnetism on a single unified theory. Some attempts to the geometrization of the electromagnetism emerged in this context, where these first models resided strictly on a classical basis. Posteriorly, they were followed by more complete and embracing quantum field theories. The present work reconsiders the classical viewpoint, with the purpose of showing that at first-order of approximation the electromagnetism constitutes a geometric structure aside other phenomena as gravitation, and that magnetic monopoles do not exist at least up to this order of approximation. Even though being limited, the model is consistent and offers the possibility of an experimental test of validity.
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22

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 electromagnetic properties of the photon is expected. There is a primordial photon from the light invariance still to be revealed, and a growing photonic market awaiting new properties of the photon. The new perspective lies in discovering electromagnetism where the photon is the own source of electromagnetic fields and self-interacting photons at the tree level are generated. Our proposal is the four bosons electromagnetism[1] . A model based on charge transfer. An enlargement to Maxwell supported upon a general electric charge triad {+,0,-} and an extension to gauge symmetry for a nonlinear abelian gauge theory[2] . Elementary particle physics shows several reactions interchanging positive, negative and zero charges. It yields a physicality considering the charges set {+,0,-} mediated by four gauge bosons. A quadruplet physics manifested by photon, massive photon and charged photons. A new EM energy is to be explored. Introducing new electromagnetic sectors beyond Maxwell as nonlinear EM, neutral EM, spintronics, weak interaction, and photonics. The basis for photonic engineering.
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23

Rehn, J., and R. Moessner. "Maxwell electromagnetism as an emergent phenomenon in condensed matter." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2075 (August 28, 2016): 20160093. http://dx.doi.org/10.1098/rsta.2016.0093.

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The formulation of a complete theory of classical electromagnetism by Maxwell is one of the milestones of science. The capacity of many-body systems to provide emergent mini-universes with vacua quite distinct from the one we inhabit was only recognized much later. Here, we provide an account of how simple systems of localized spins manage to emulate Maxwell electromagnetism in their low-energy behaviour. They are much less constrained by symmetry considerations than the relativistically invariant electromagnetic vacuum, as their substrate provides a non-relativistic background with even translational invariance broken. They can exhibit rich behaviour not encountered in conventional electromagnetism. This includes the existence of magnetic monopole excitations arising from fractionalization of magnetic dipoles; as well as the capacity of disorder, by generating defects on the lattice scale, to produce novel physics, as exemplified by topological spin glassiness or random Coulomb magnetism. This article is part of the themed issue ‘Unifying physics and technology in light of Maxwell's equations’.
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24

Baumgärtel, Christof, and Simon Maher. "Foundations of Electromagnetism: A Review of Wilhelm Weber’s Electrodynamic Force Law." Foundations 2, no. 4 (October 19, 2022): 949–80. http://dx.doi.org/10.3390/foundations2040065.

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This article reviews the electrodynamic force law of Wilhelm Weber and its importance in electromagnetic theory. An introduction is given to Weber’s force and it is shown how it has been utilised in the literature to explain electromagnetism as well as phenomena in other disciplines of physics, where the force law has connections to the nuclear force, gravity, cosmology, inertia and quantum mechanics. Further, criticism of Weber’s force is reviewed and common misconceptions addressed and rectified. It is found that, while the theory is not without criticism and has much room for improvement, within the limitations of its validity, it is equally as successful as Maxwell’s theory in predicting certain phenomena. Moreover, it is discussed how Weber offers a valid alternative explanation of electromagnetic phenomena which can enrich and complement the field perspective of electromagnetism through a particle based approach.
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25

Ádám, A., P. Bencze, F. Märcz, D. Martini, G. Sátori, L. Szarka, J. Verő, V. Wesztergom, and B. Zieger. "Earth electromagnetism." Acta Geodaetica et Geophysica Hungarica 40, no. 3-4 (October 2005): 317–48. http://dx.doi.org/10.1556/ageod.40.2005.3-4.6.

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26

Belot, Gordon. "Understanding Electromagnetism." British Journal for the Philosophy of Science 49, no. 4 (December 1, 1998): 531–55. http://dx.doi.org/10.1093/bjps/49.4.531.

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27

Carpenter, John. "Understanding electromagnetism." Engineering Science and Education Journal 2, no. 6 (1993): 273. http://dx.doi.org/10.1049/esej:19930078.

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28

Ranada, A. F. "Topological electromagnetism." Journal of Physics A: Mathematical and General 25, no. 6 (March 21, 1992): 1621–41. http://dx.doi.org/10.1088/0305-4470/25/6/020.

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29

Kaufman, A. A. "Geo-electromagnetism." Physics of the Earth and Planetary Interiors 37, no. 4 (March 1985): 288–89. http://dx.doi.org/10.1016/0031-9201(85)90016-0.

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30

Calvin, H. A., and S. P. Virostek. "Railgun electromagnetism." IEEE Transactions on Magnetics 31, no. 1 (January 1995): 107–12. http://dx.doi.org/10.1109/20.364719.

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31

Maartens, Roy, and Bruce A. Bassett. "Gravito-electromagnetism." Classical and Quantum Gravity 15, no. 3 (March 1, 1998): 705–17. http://dx.doi.org/10.1088/0264-9381/15/3/018.

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32

Burch, Aidan. "Histories electromagnetism." Journal of Mathematical Physics 45, no. 6 (June 2004): 2153–70. http://dx.doi.org/10.1063/1.1723702.

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33

M, L. "Molecular electromagnetism." Journal of Molecular Structure 147, no. 1-2 (September 1986): 189–90. http://dx.doi.org/10.1016/0022-2860(86)87072-7.

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34

Qadir, Asghar, and D. P. Mason. "Sesquicentennial of the presentation by James Clerk Maxwell of his paper "A Dynamical Theory of the Electromagnetic Field" to the Royal Society of London." International Journal of Modern Physics: Conference Series 38 (January 2015): 1560070. http://dx.doi.org/10.1142/s2010194515600708.

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James Clerk Maxwell is generally regarded as the greatest contributor to the development of Physics in the time between Newton and Einstein. His most important contributions are the Kinetic Theory of Gases and Electromagnetism which is the unified theory of Electricity and Magnetism. Although his major work on Electromagnetism was published in 1865 it was read at a meeting of the Royal Society of London in 1864. The sesquicentennial of the theory correctly falls in 2014. In this article that event is celebrated. Parts of his early and professional life are described. Aspects of his many contributions are discussed but mainly we concentrate on his contributions through thermal and electromagnetic Physics.
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35

Demir, Süleyman, Murat Tanişli, and Mustafa Emre Kansu. "Octonic massless field equations." International Journal of Modern Physics A 30, no. 15 (May 26, 2015): 1550084. http://dx.doi.org/10.1142/s0217751x15500840.

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In this paper, it is proven that the associative octons including scalar, pseudoscalar, pseudovector and vector values are convenient and capable tools to generalize the Maxwell–Dirac like field equations of electromagnetism and linear gravity in a compact and simple way. Although an attempt to describe the massless field equations of electromagnetism and linear gravity needs the sixteen real component mathematical structures, it is proved that these equations can be formulated in terms of eight components of octons. Furthermore, the generalized wave equation in terms of potentials is derived in the presence of electromagnetic and gravitational charges (masses). Finally, conservation of energy concept has also been investigated for massless fields.
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36

L Dawe, Ross, and Kenneth C Hines. "The Physics of Tachyons III. Tachyon Electromagnetism." Australian Journal of Physics 47, no. 4 (1994): 431. http://dx.doi.org/10.1071/ph940431.

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A new formulation of the theory of tachyons using the same two postulates as in special relativity is applied to electromagnetism. Tachyonic transformations of the electromagnetic fields E and B are rigorously derived from Maxwell's equations and are shown to be the same as for bradyonic transformations. Tachyonic transformations of current density, charge density, scalar and vector potentials are also derived and discussed. Tachyonic optics and the four-potential of a moving tachyonic charge are also discussed, along with generalised four-vector transformations and electromagnetic four-tensors in extended relativity. Use is made of a switching principle to show how tachyons automatically obey the law of conservation of electric charge in any inertial reference frame, even though the observed tachyon electric charge is not an invariant between observers. The electromagnetic field produced by a charged tachyon takes the form of a Mach cone, inside which the electromagnetic field is real and detectable, while outside the cone the field generated by the tachyon is imaginary and undetectable.
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37

Kaliampos, G., P. Pantidos, M. Kalogiannakis, and K. Ravanis. "A Study of the Understanding of Key Concepts of Electromagnetism of 11th Grade Greek High School Students." Jurnal Pendidikan IPA Indonesia 10, no. 4 (December 29, 2021): 474–85. http://dx.doi.org/10.15294/jpii.v10i4.31863.

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This study is set in the context of teaching and learning about electromagnetism in Greek high schools. Drawing from constructivism theory, the study aspires to explore students’ understandings of key concepts on both electric and magnetic field as well as electromagnetic induction. For this purpose, an experimental investigation was conducted with 80 11nth grade high school students. Empirical data was collected through a questionnaire which was developed on the basis of test subjects used on past exams in Greek high schools in electromagnetism area. Research findings suggest that students face difficulties in dealing with qualitative tasks in electric and magnetic field. In addition, they seem to confront severe difficulties in conceptualizing the notion of induction of emf.
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38

Bossavit, A. "The premetric approach to electromagnetism in the 'waves are not vectors' debate." Advanced Electromagnetics 1, no. 1 (September 26, 2012): 97. http://dx.doi.org/10.7716/aem.v1i1.66.

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A plea for the introduction, in advanced electromagnetics courses, of some basic differential geometric notions: covectors, differential forms, Hodge operators. The main advantages of this evolution should be felt in computational electromagnetism. It may also shed some new light on the concept of material isotropy.
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39

Jia, Chao, Xu Fang Bo, Wen Qian An, and Xiao Fang Chen. "Design and Study of Sensor Layout of Magnetic Navigation Smart Car." Advanced Materials Research 945-949 (June 2014): 1916–19. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.1916.

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This article introduces tracking principle of the "Freescale" intelligent vehicle electromagnetic group which is using inductance coil as sensor and the principle of electromagnetism, it analyzes the different number and the layout of inductance coils which affect the tracking of smart car and corresponding solution.
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40

Jones, Preston, and Douglas Singleton. "Interaction between gravitational radiation and electromagnetic radiation." International Journal of Modern Physics D 28, no. 06 (April 2019): 1930010. http://dx.doi.org/10.1142/s0218271819300106.

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In this review paper, we investigate the connection between gravity and electromagnetism from Faraday to the present day. The particular focus is on the connection between gravitational and electromagnetic radiation. We discuss electromagnetic radiation produced when a gravitational wave passes through a magnetic field. We then discuss the interaction of electromagnetic radiation with gravitational waves via Feynman diagrams of the process [Formula: see text]. Finally, we review recent work on the vacuum production of counterpart electromagnetic radiation by gravitational waves.
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41

GUENDELMAN, E. I. "COUPLING ELECTROMAGNETISM TO GLOBAL CHARGE." International Journal of Modern Physics A 28, no. 32 (December 30, 2013): 1350169. http://dx.doi.org/10.1142/s0217751x13501698.

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It is shown that an alternative to the standard scalar quantum electrodynamics (QED) is possible. In this new version, there is only global gauge invariance as far as the charged scalar fields are concerned, although local gauge invariance is kept for the electromagnetic field. The electromagnetic coupling has the form jμ(Aμ +∂μB) where B is an auxiliary field and the current jμ is Aμ independent, so that no "sea gull terms" are introduced. As a consequence of the absence of sea gulls, it is seen that no Klein paradox appears in the presence of a strong square well potential. In a model of this kind, spontaneous breaking of symmetry does not lead to photon mass generation, instead the Goldstone boson becomes a massless source for the electromagnetic field. When spontaneous symmetry breaking takes place infrared questions concerning the theory and generalizations to global vector QED are discussed. In this framework, Q-Balls and other nontopological solitons that owe their existence to a global U(1) symmetry can be coupled to electromagnetism and could represent multiply charged particles now in search in the large hadron collider (LHC). Furthermore, we give an example where an "Emergent" Global Scalar QED can appear from an axion–photon system in an external magnetic field. Finally, formulations of Global Scalar QED that allow perturbative expansions without sea gulls are developed.
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42

Chi, Yao Dan, Hai Long Gu, Yin Han Gao, Xiao Tian Yang, and Sheng Qian Zhang. "Survey to Automobile Electromagnetic Compatibility Simulation Software." Applied Mechanics and Materials 220-223 (November 2012): 2968–72. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.2968.

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With the rapid developments of computer technology and computing electromagnetism, it is possible to simulate the electromagnetic compatibility of automobiles. At the beginning of the design, electromagnetic compatibility simulation analysis of automobiles can not only shorten the research cycle, but also reduce the cost. In this paper, we summarized the current commercial electromagnetic compatibility simulation analysis software, analyzed the features and applied algorithms of each software, and gave the simulation examples of Ansoft HFSS and FEKO.
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43

Achille Ecladore, Tchahou Tchendjeu, Yungho Edickson Bobo, and Nfah Eustace Mbaka. "Design and Realization of a Controlled Electromagnetic Breaking System." Journal of Engineering 2023 (August 14, 2023): 1–12. http://dx.doi.org/10.1155/2023/1426506.

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Industrial machines with sharp moving blades are extremely dangerous to workers. These machines often rotate for some time (called the run-down time) before completely stopping due to little or no brakes. In the case where brakes are used, they are mechanical in nature and are associated with problems of wear out and frequent maintenance among others. In this paper, we proposed a mathematical model and implementation of an electromagnet and design and construction of a mechanical support frame and a controller for the electromagnetic braking system. The electromagnetic braking system works on the principle of electromagnetism. To realize the semicircular electromagnets, we coil the gauge wires several times around a ferromagnetic core material. The electromagnet was connected to a 12 V 7 Ah battery and was used to lift a load whose mass and corresponding weight were predetermined using a scale balance. The magnetic force generated was equal to the amount of maximum load it could lift. The mechanical frame, on which the electromagnets, motor, battery, switches, and chain drive system were mounted, was designed using SolidWorks and constructed by measuring, cutting, and joining of iron materials. A microcontroller and a power MOSFET were used in the control circuit to drive the electromagnet. Major results such as the realized electromagnets and the magnitude of the electromagnetic force (1.43 N) produced by the electromagnets are presented. The mechanical frame and the control circuit are also presented. The braking force was greater than the rotation torque of the disc, and hence braking was achieved.
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44

Ozcan, Ozgur. "Examining the students’ understanding level towards the concepts of magnetic field: the case of conducting wire." International Journal of Innovative Research in Education 6, no. 2 (December 31, 2019): 40–46. http://dx.doi.org/10.18844/ijire.v6i2.4425.

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The electromagnetism is one of the important topics in physics and it has quite a lot of applications in a wide range of area. It also examines the electromagnetic force researches that occur between the electrically charged particles. On the other hand, examination of the magnetic field around the conductors and the movement of the charged particles in the electromagnetic field is quite interesting topics on that the physics researchers intensively investigated. The electromagnetic theory has an abstract nature, because the university level students have many learning and understanding difficulties about the concepts related to these topics. In realization of meaningful learning, the role of the students’ prior knowledge about the aforementioned concepts is becoming important. This study aims to investigate the understanding of 12 pre-service physics teachers related to the concept of moving particles in an electromagnetic filed by using the qualitative research methods. The data collected through the test consisting of three question and it was analysed by using content analysis method. The understanding levels and the alternative conceptions of the pre-service physics teachers were determined by different categories at the end of the content analyses process. Keywords: Alternative conceptions, electromagnetism education, pre-service physics teachers; understanding level;
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45

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 EM phenomena emerges based on three interconnected charges {+, 0, −} under four intermediated bosons {Aµ, Uµ, V±µ }. From Maxwell photon, EM becomes a systemic cooperation between four fields. This quadruplet originates a new electric charge physics. New features for electric charge conservation, exchange, conduction, interaction are derived. The research is to analyze the Four Bosons Electromagnetism gauge invariance and EM flux. The model is studied under U(1), SO(2)global and U(1)×SO(2)global symmetries. Two approaches are considered. Based on fields strengths and on fields. A gauge invariant quadruplet physics is obtained under free coefficients conditions. A nonlinear EM flux appears. Without requiring electric charge as source nonlinear fields work as own sources for flowing spin-1 and spin-0 waves and particles. It flows through a four potential field quadruplet, granular and collective fields strengths. A self contained EM is constituted providing a nonlinear physicality that precedes physical constants as electric charge and medium parameters. The EM meaning is enlarged and we have to understand on the physical structures generated by this antireductionist nonlinear four bosons microscopic electromagnetism. Determine the corresponding fields blocks which are real and gauge invariants. They are identified as the electromagnetic domains. The Four Bosons EM develops interdependent EM domains. Interlaced physical sectors sharing a common EM energy context. Lagrangian, equations of motion, conservation laws are expressing such domains physics. They correspond to physical sectors where each one contains its own EM energy.
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46

Xu, Jiang Tao. "Improve Dynamic Performance on High Speed by Application of Electromagnetic Valve Actuation." Applied Mechanics and Materials 462-463 (November 2013): 826–29. http://dx.doi.org/10.4028/www.scientific.net/amm.462-463.826.

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This paper base on electromagnetism valve technology, the intake valves of a car driven by electromagnetic valve, by cooperating average torque of engine with prototype by 6000 RPM engine, then found that the average torque can be increased by 5.679% after changing the intake valves with electromagnetic valves. The increasing torque contributed to increasing the air intake in the opening stage and off stage improved, and provided a theoretical basis for the promotion of the electromagnetic variable valve in automotive.
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47

Wang, Hong Ming, Chang Chen Qu, Xiao Jian Fan, and Gui Rong Li. "Simulation Study on the Force of Particles Migrating in Molten Metal under High-Frequency Magnetic Field." Advanced Materials Research 1095 (March 2015): 851–54. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.851.

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According to the basic principles of electromagnetism, the magnetic flux density on the surface of the metal melt was calculated by numerical simulation method. The relational expression of the electromagnetic body force and the magnetic flux density was deduced. The results show that the electromagnetic body force in the melt is directly proportional to the square of the magnetic induction intensity. Increasing the electric current, the electromagnetic body force in the melt can be increased effectively. Increasing the frequency, the particular electromagnetic body force within the melt can be increased first and then decreased.
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48

Finster, Felix, José M. Isidro, Claudio F. Paganini, and Tejinder P. Singh. "Theoretically Motivated Dark Electromagnetism as the Origin of Relativistic Modified Newtonian Dynamics." Universe 10, no. 3 (March 4, 2024): 123. http://dx.doi.org/10.3390/universe10030123.

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The present paper is a modest attempt to initiate the research program outlined in this abstract. We propose that general relativity and relativistic MOND (RelMOND) are analogues of broken electroweak symmetry. That is, SU(2)R×U(1)YDEM→U(1)DEM (DEM stands for dark electromagnetism), and GR is assumed to arise from the broken SU(2)R symmetry and is analogous to the weak force. RelMOND is identified with dark electromagnetism U(1)DEM, which is the remaining unbroken symmetry after the spontaneous symmetry breaking of the dark electro-grav sector SU(2)R×U(1)YDEM. This sector, as well as the electroweak sector, arises from the breaking of an E8×E8 symmetry in a recently proposed model of unification of the standard model with pre-gravitation, with the latter based on an SU(2)R gauge theory. The source charge for the dark electromagnetic force is the square root of mass, motivated by the experimental fact that the ratio of the square roots of the masses of the electron, up-quark, and down-quark is 1:2:3, which is the opposite of the ratio of their electric charges at 3:2:1. The introduction of the dark electromagnetic force helps us understand the peculiar mass ratios of the second and third generations of charged fermions. We also note that in the deep MOND regime, acceleration is proportional to the square root of mass, which motivates us to propose the relativistic U(1)DEM gauge symmetry as the origin of MOND. We explain why the dark electromagnetic force falls inversely with distance, as in MOND, rather than following the inverse square of distance. We conclude that dark electromagnetism effectively mimics cold dark matter, and the two are essentially indistinguishable in cosmological situations where CDM successfully explains observations, such as CMB anisotropies and gravitational lensing.
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49

Salmi, Khalid, Hamid Magrez, and Abdelhak Ziyyat. "Didactic Simulations for Electromagnetism Based on an Element Oriented Model." International Journal of Engineering Pedagogy (iJEP) 9, no. 5 (November 22, 2019): 24. http://dx.doi.org/10.3991/ijep.v9i5.10696.

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The web has spurred our imagination as to how education can be drastically transformed and improved through the adoption of Information and Communications Technology (ICT) and the use of simulations quickly became a wildly disputed topic. This kind of simulations are considered as a significant pedagogical innovation especially in the electromagnetics course where it is possible to concretize , via a set of interactive simulations, some experiments that are inaccessible in real life. The aim of interactive simulations is to enhance the student’s understanding by providing him a meaningful insight into the studied notions, phenomena, concepts, laws and models. The design of didactic simulations is constrained by both technological choices, learning theories and numerical models which should guarantee a minimal execution time, a better stability and an acceptable precision. Our goal in this work is to design didactic simulations for electromagnetism using a numerical Element Oriented Method (EOM). The proposed EOM meets the needs of speed, accuracy and ensure bet-ter dynamical and visual interpretations of the basic laws of electromagnetic. Moreover, these applications are not only available for traditional training in the classroom but also for new training platforms provided by digital technologies such as web-based training, e-learning and m-learning.
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50

Casey, Terry. "Gravity and electromagnetism." Physics Essays 29, no. 2 (June 15, 2016): 237–38. http://dx.doi.org/10.4006/0836-1398-29.2.237.

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