Journal articles: 'Electrodynamic'

1

Crenshaw, Michael E. "Quantum electrodynamic foundations of continuum electrodynamics." Physics Letters A 336, no. 2-3 (2005): 106–11. http://dx.doi.org/10.1016/j.physleta.2004.12.081.

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Gömöri, Márton, and László E. Szabó. "Operational understanding of the covariance of classical electrodynamics." Physics Essays 26, no. 3 (2013): 362–71. http://dx.doi.org/10.4006/0836-1398-26.3.362.

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It is common in the literature on classical electrodynamics and relativity theory that the transformation rules for the basic electrodynamic quantities are derived from the pre-assumption that the equations of electrodynamics are covariant against these—unknown—transformation rules. There are several problems to be raised concerning these derivations. This is, however, not our main concern in this paper. Even if these derivations are regarded as unquestionable, they leave open the following fundamental question: Are the so-obtained transformation rules indeed identical with the true transformation laws of the empirically ascertained electrodynamic quantities? This is of course an empirical question. In this paper, we will answer this question in a purely theoretical framework by applying what Bell calls “Lorentzian pedagogy”—according to which the laws of physics in any one reference frame account for all physical phenomena, including what a moving observer must see when performs measurement operations with moving measuring devices. We will show that the real transformation laws are indeed identical with the ones obtained by presuming the covariance of the equations of electrodynamics, and that the covariance is indeed satisfied. Beforehand, however, we need to clarify the operational definitions of the fundamental electrodynamic quantities. As we will see, these semantic issues are not as trivial as one might think.

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Boyer, Timothy. "Stochastic Electrodynamics: The Closest Classical Approximation to Quantum Theory." Atoms 7, no. 1 (2019): 29. http://dx.doi.org/10.3390/atoms7010029.

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Stochastic electrodynamics is the classical electrodynamic theory of interacting point charges which includes random classical radiation with a Lorentz-invariant spectrum whose scale is set by Planck’s constant. Here, we give a cursory overview of the basic ideas of stochastic electrodynamics, of the successes of the theory, and of its connections to quantum theory.

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Sun, Yun, Hongxin Zhang, Zhen Liang, and Jian Yang. "Design Optimization of Electrodynamic Structure of Permanent Magnet Piston Mechanical Electric Engine." Energies 14, no. 19 (2021): 6313. http://dx.doi.org/10.3390/en14196313.

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To meet the demand of multiple power requirements, and enhance power utilization, a new type of dual-element electricity unit is designed in this study, which is a permanent magnet piston mechanical electric engine. Based on the analysis method of traditional internal combustion engines and linear generators, the working principle of the engine and the magnetic field distribution in the electrodynamic structure are analyzed, the machine dynamics model and electrodynamics model of the engine are established, then the theoretical evaluation is additionally established using finite elements. Based on this, an optimization model is constructed with the electrodynamic shape dimension as the optimization variable, with the intention of growing the output power. The optimization of the engine electrodynamic shape is executed via the use of the finite aspect approach and the NLPQL optimization algorithm integrated. The results show that the optimized engine output electricity expanded to 8.40 w, which is 18.81% greater than before optimization. An experimental prototype is developed, and the output voltage of the prototype is measured to verify the precept and overall performance of the new structure.

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Mazharimousavi, S. Habib. "A note on Reissner–Nordström black holes in the inverse electrodynamics model." International Journal of Geometric Methods in Modern Physics 18, no. 10 (2021): 2150155. http://dx.doi.org/10.1142/s0219887821501553.

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Recently, the inverse electrodynamics model (IEM) was introduced and applied to find Reissner–Nordström black holes in the context of the general relativity coupled minimally with the nonlinear electrodynamics. The solution consists of both electric and magnetic fields as of the dyonic solutions. Here, in this note, we show that the IEM model belongs to a more general class of the nonlinear electrodynamics with [Formula: see text]. Here, [Formula: see text] is the energy momentum tensor of the nonlinear electrodynamic Lagrangian. Naturally, such a dyonic RN black hole solution is the solution for this general class.

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Giardino, Sergio. "Quaternionic electrodynamics." Modern Physics Letters A 35, no. 39 (2020): 2050327. http://dx.doi.org/10.1142/s0217732320503277.

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We develop a quaternionic electrodynamics and show that it naturally supports the existence of magnetic monopoles. We obtained the field equations, the continuity equation, the electrodynamic force law, the Poynting vector, the energy conservation, and the stress-energy tensor. The formalism also enabled us to generalize the Dirac monopole and the charge quantization rule.

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Polyansky, Ivan S., Dmitry E. Stepanov, Dmitry K. Ketoh, and Vyacheslav A. Shevchenko. "Electrodynamic analysis of mirror antennas in the approximation of the barycentric method." Physics of Wave Processes and Radio Systems 23, no. 4 (2021): 36–47. http://dx.doi.org/10.18469/1810-3189.2020.23.4.36-47.

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In the article, the features of using the barycentric method in solving problems of electrodynamic analysis of mirror antennas are considered. The solution of the internal problem of electrodynamics is the basis of the study. The problem of electrodynamic analysis of a mirror antenna is formulated in the classical representation of the problem of diffraction of an electromagnetic wave on a system of infinitely thin perfectly conducting screens of arbitrary shape and reduced to a system of integro-differential equations. The solution of the latter is performed numerically in the projection formulation of the Galerkin method when determining the approximation of the desired surface current density function in the system of global basis functions formed in the approximation of the barycentric method for the analyzed screen. The integral representation of the electromagnetic field of the mirror antenna, taking into account the properties of the introduced basic functions, is given. Thefeatures of the algorithmic implementation of the developed solutions are clarified. The efficiency and comparative preference of the use of the barycentric method in the problems of electrodynamic analysis of mirror antennas are tested on test examples.

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Rozov, Andrey Leonidovich. "Modelling of Electrodynamic Phenomena in Slowly Moving Media." Zeitschrift für Naturforschung A 72, no. 8 (2017): 757–62. http://dx.doi.org/10.1515/zna-2016-0287.

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AbstractWe discuss the feasibility of using, along with Minkowski equations obtained on the basis of the theory of relativity and used at present in electrodynamics, alternative methods of describing the processes of interaction between electromagnetic fields and moving media. In this article, a way of describing electromagnetic fields in terms of classical mechanics is offered. A system of electrodynamic equations for slowly moving media was derived on the basis of Maxwell’s theory within the framework of classical mechanics using Wilsons’ experimental data with dielectrics in a previous article [A. Rozov, Z. Naturforsch. 70, 1019 (2015)]. This article puts forward a physical model that explains the features of the derived equations. The offered model made it possible to suggest a new approach to the derivation of electrodynamic equations for slowly moving media. A variant of Galileo’s relativity principle, in accordance with which the electrodynamic equations for slowly moving media should be considered as Galilean-invariant, is laid down on the basis of both the interpretation of Galileo’s concept following from Galileo’s works and Pauli’s concept of postulate of relativity within the framework of the represented physical model.

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SIVASUBRAMANIAN, S., A. WIDOM, and Y. N. SRIVASTAVA. "RADIATIVE PHASE TRANSITIONS AND CASIMIR EFFECT INSTABILITIES." Modern Physics Letters B 20, no. 22 (2006): 1417–25. http://dx.doi.org/10.1142/s0217984906011748.

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Molecular quantum electrodynamics lead to photon frequency shifts and thus to changes in condensed matter free energies (often called the Casimir effect). Strong quantum electrodynamic coupling between radiation and molecular motions can lead to an instability beyond which one or more photon oscillators undergo a displacement phase transition. We show that the phase boundary of the transition can be located by a Casimir free energy instability.

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10

Hays, M., V. Fatemi, D. Bouman, et al. "Coherent manipulation of an Andreev spin qubit." Science 373, no. 6553 (2021): 430–33. http://dx.doi.org/10.1126/science.abf0345.

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Two promising architectures for solid-state quantum information processing are based on electron spins electrostatically confined in semiconductor quantum dots and the collective electrodynamic modes of superconducting circuits. Superconducting electrodynamic qubits involve macroscopic numbers of electrons and offer the advantage of larger coupling, whereas semiconductor spin qubits involve individual electrons trapped in microscopic volumes but are more difficult to link. We combined beneficial aspects of both platforms in the Andreev spin qubit: the spin degree of freedom of an electronic quasiparticle trapped in the supercurrent-carrying Andreev levels of a Josephson semiconductor nanowire. We performed coherent spin manipulation by combining single-shot circuit–quantum-electrodynamics readout and spin-flipping Raman transitions and found a spin-flip time TS = 17 microseconds and a spin coherence time T2E = 52 nanoseconds. These results herald a regime of supercurrent-mediated coherent spin-photon coupling at the single-quantum level.

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11

Purwanto, Joko. "Aplikasi Aljabar Geometris Pada Teori Elektrodinamika Klasik." Jurnal Fourier 1, no. 2 (2012): 89. http://dx.doi.org/10.14421/fourier.2012.12.89-96.

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In this paper geometric algebra and its aplication in the theory of classical electrodynamic will be studied. Geometric algebra provide many simplification and new insight in the theoretical formulation and physical aplication of theory. In this work has been studied aplication of geometric algebra in classical electrodynamics especially Maxwell’s equations. Maxwell’s equations was formulated in one compact equation ÑF=J. The various equation parts are easily identified by their grades.

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12

Zeyde, K. M. "Analysis of Electrodynamics Properties of Materials with High Dispersity Metal Powder in Axial Moving Systems." Materials Science Forum 870 (September 2016): 90–94. http://dx.doi.org/10.4028/www.scientific.net/msf.870.90.

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This paper describes the reception, researching and electrodynamics investigations of recently obtained materials. These materials demonstrated the losses dielectric behavior and represent a wide interest as radio markers with controlled distortion. The investigated samples can be used as a coating for rotating machine elements for radio diagnostics. The considered materials performed by epoxy warp with high dispersity metal powder content established the required properties for iron 60 % and nickel 60 %. Primary materials parameters are taken in the natural experiment and electrodynamics properties are studied based on a mathematical model. The presented results can be extended to seminatural experiment setup in future. This paper does not contain the formulation of electrodynamic problem.

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13

Zwicky, Paul, and Roger Schultheiss. "Electrodynamic loudspeaker." Journal of the Acoustical Society of America 93, no. 5 (1993): 3022. http://dx.doi.org/10.1121/1.405747.

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14

Emerson, Andrew C., and Stephen A. Foster. "Electrodynamic shakers." Journal of the Acoustical Society of America 82, no. 5 (1987): 1858. http://dx.doi.org/10.1121/1.395742.

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15

Myslinski, Adam, Bazyli Semeniuk, and Teresa Kasprzycka-Guttman. "Electrodynamic pulsator." Industrial & Engineering Chemistry Research 32, no. 11 (1993): 2934–36. http://dx.doi.org/10.1021/ie00023a067.

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16

Gabadadze, Gregory, and Rachel A. Rosen. "Electrodynamic metanuclei." Physics Letters B 666, no. 3 (2008): 277–82. http://dx.doi.org/10.1016/j.physletb.2008.06.071.

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17

Murakami, Fumikazu. "Electrodynamic speaker." Journal of the Acoustical Society of America 78, no. 5 (1985): 1931. http://dx.doi.org/10.1121/1.392687.

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18

Gurtug, O., S. Habib Mazharimousavi, and M. Halilsoy. "(2 + 1)-dimensional dynamical black holes in Einstein-nonlinear Maxwell theory." Modern Physics Letters A 33, no. 04 (2018): 1850027. http://dx.doi.org/10.1142/s021773231850027x.

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Radiative extensions of BTZ metric in 2 + 1 dimensions are found which are sourced by nonlinear Maxwell fields and a null current. This may be considered as generalization of the problem formulated long go by Vaidya and Bonnor. The mass and charge are functions of retarded/advanced null coordinate apt for decay/inflation. The new solutions are constructed through a Theorem that works remarkably well for any nonlinear electrodynamic model. Hawking temperature is analyzed for the case of the Born–Infeld electrodynamics.

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19

Raevsky, Sergey B., Sergey A. Kapustin, and Alexey S. Raevsky. "Integral representations in boundary-value problems on calculation of devices of microwave and EHF bands." Physics of Wave Processes and Radio Systems 23, no. 4 (2021): 8–18. http://dx.doi.org/10.18469/1810-3189.2020.23.4.8-18.

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In the electrodynamic calculation of microwave (EHF) devices using methods that lead to algorithms in an open form, strict integral relations (representations) are very useful: Lorentz lemma, reciprocity theorem, orthogonality condition for eigenwaves, etc. of the results obtained, their convergence improves, and in some cases the calculation of characteristics that cannot be calculated without the indicated representations. Integral representations are a record of the equations of electrodynamics (in any unified form) and their solutions in one or another generalized form, linking in general the electromagnetic fields in electrodynamic structures described by boundary value problems. Integral views are used to control the results obtained; insome cases, they allow obtaining analytical solutions; lead to self-consistent problems that take into account the reverse effect of the radiation field on the primary sources; allow obtaining a priori information about the spectrum of possible solutions; solve associated problems as specific problems of arousal. Consideration of the phenomenon of complex resonance in this work shows that integral representations make it possible to establish a connection between non-self-adjointness and self-consistency of boundary value problems.

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20

Alpin, Timur Yu, and Alexander B. Balakin. "The Einstein–Maxwell-aether-axion theory: Dynamo-optical anomaly in the electromagnetic response." International Journal of Modern Physics D 25, no. 04 (2016): 1650048. http://dx.doi.org/10.1142/s0218271816500486.

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We consider a pp-wave symmetric model in the framework of the Einstein–Maxwell-aether-axion theory. Exact solutions to the equations of axion electrodynamics are obtained for the model, in which pseudoscalar, electric and magnetic fields were constant before the arrival of a gravitational pp-wave. We show that dynamo-optical interactions, i.e. couplings of electromagnetic field to a dynamic unit vector field, attributed to the velocity of a cosmic substratum (aether, vacuum, dark fluid[Formula: see text]), provide the response of axionically active electrodynamic system to display anomalous behavior.

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21

Samokhin, V. P., K. V. Mescsherinova, and E. A. Tikhomirova. "Carl Friedrich Gauss (the 240 Anniversary of his Birth)." Mechanical Engineering and Computer Science, no. 9 (November 4, 2017): 44–86. http://dx.doi.org/10.24108/0917.0001302.

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A brief review of the major achievements of Andre-Marie Ampere, a prominent French scholar and the founder of electrodynamics and the author of fundamental works in the field of chemistry, biology, linguistics, and philosophy. Provides information about the parents Ampere, interesting facts from his life and work, including details of his self-education, interest in mathematics, chemistry and teaching. Some interesting facts from the history of electrodynamics associated with contributions in this direction Hans Oersted, Francois Arago and Augustin Fresnel. The designs of the two instruments, invented by Ampere for electrodynamic research and discussions with the opponents of the emerging science. Given the introduction of preconditions Ampe rum concepts of voltage, current, and its direction, which became the basis for the withdrawal of Ampere law of interaction of currents, which now bears his name.

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22

Graneau, P., and P. N. Graneau. "Electrodynamic momentum measurements." Journal of Physics D: Applied Physics 21, no. 12 (1988): 1826. http://dx.doi.org/10.1088/0022-3727/21/12/027.

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23

Schutter, E., and V. Gorelik. "Electrodynamic acoustic transducer." Journal of the Acoustical Society of America 102, no. 5 (1997): 2474. http://dx.doi.org/10.1121/1.420413.

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Cifra, Michal, Daniel Havelka, and Ondřej Kučera. "Cellular electrodynamic activity." BIO Web of Conferences 6 (2016): 01005. http://dx.doi.org/10.1051/bioconf/20160601005.

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Cividjian, G. A., A. G. Cividjian, and N. G. Silvis-Cividjian. "“Corner” Electrodynamic Force." IEEE Transactions on Magnetics 40, no. 2 (2004): 384–89. http://dx.doi.org/10.1109/tmag.2004.824108.

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26

Andrzej Glinka, Lukasz. "Massive Electrodynamic Gravity." Applied Mathematics and Physics 2, no. 3 (2014): 112–18. http://dx.doi.org/10.12691/amp-2-3-7.

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Spjut, R. Erik, Ezra Bar‐Ziv, Adel F. Sarofim, and John P. Longwell. "Electrodynamic thermogravimetric analyzer." Review of Scientific Instruments 57, no. 8 (1986): 1604–10. http://dx.doi.org/10.1063/1.1138538.

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Grebowsky, J. M., and J. C. Gervin. "Geospace electrodynamic connections." Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science 26, no. 4 (2001): 253–58. http://dx.doi.org/10.1016/s1464-1917(00)00117-3.

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29

Hoffmann, Patrick. "Electrodynamic acoustic transducer." Journal of the Acoustical Society of America 126, no. 3 (2009): 1635. http://dx.doi.org/10.1121/1.3230435.

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30

Hite, Gerald E., and James E. McCoy. "The electrodynamic tether." American Journal of Physics 56, no. 3 (1988): 222–25. http://dx.doi.org/10.1119/1.15651.

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31

Zuchowski, Lena. "For electrodynamic consistency." Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 44, no. 2 (2013): 135–42. http://dx.doi.org/10.1016/j.shpsb.2013.02.003.

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32

Ringermacher, Harry I. "An electrodynamic connection." Classical and Quantum Gravity 11, no. 9 (1994): 2383–94. http://dx.doi.org/10.1088/0264-9381/11/9/018.

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33

Degiorgi, L., G. Grüner, P. Wachter, et al. "Electrodynamic response ofRb3C60." Physical Review B 46, no. 17 (1992): 11250–53. http://dx.doi.org/10.1103/physrevb.46.11250.

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34

Zaidel’, R. M. "Composite electrodynamic liner." Journal of Applied Mechanics and Technical Physics 40, no. 5 (1999): 784–90. http://dx.doi.org/10.1007/bf02468459.

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35

Zaitsev, Yu M., N. N. Nikolaev, N. V. Russova, and T. V. Stepanov. "Electrodynamic compensator for high-current contact devices." IOP Conference Series: Earth and Environmental Science 990, no. 1 (2022): 012019. http://dx.doi.org/10.1088/1755-1315/990/1/012019.

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Abstract Compensators of electrodynamic repulsion forces of closed electrical contacts are designed to increase the stability of the operation of switching electrical devices when short-circuit currents flow. The possibilities of increasing the efficiency of electrodynamic compensators (one-loop and two-loop) in their traditional design are very limited. The paper analyzes an electrodynamic compensator for high-current contacts, in which the free end of the inactive contact included in the design of the compensator with contact pads is bent 180 degrees towards the axis of rotation of the inactive contact. As a result of this, the shoulder, on which the electrodynamic force of repulsion of the contacts acts, decreases. In such a design, the moment of repulsion of the contacts will also be less and the fulfillment of the condition for its full compensation is facilitated. Formulas are given for calculating the additional electrodynamic force of the considered compensator and its contour coefficient. Calculations of the additional electrodynamic effort of the breaker compensator for a rated current of 630A with a short-time withstand current of 40kA have been performed. With the length of the bent part of the inactive contact equal to 25% of the total length of the current loop, the resulting electrodynamic force of the compensator increases by 4.69%. In this case, a 25% reduction in the torque that is repulsive to the contacts occurs.

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36

Lvovich, I. Ya, Ya E. Lvovich, A. P. Preobrazhenskiy, Yu P. Preobrazhenskiy, and O. N. Choporov. "Automation of the development of electrodynamic objects based on the dual approach." Journal of Physics: Conference Series 2094, no. 2 (2021): 022017. http://dx.doi.org/10.1088/1742-6596/2094/2/022017.

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Abstract This paper considers an approach that demonstrates the features of creating complex electrodynamic systems. In practice, the creation of such objects is associated with a decrease in the levels of electromagnetic radiation, control of the direction of propagation of electromagnetic waves. The main properties of the generated automated system for assessing the quality of the electrodynamic characteristics of objects are considered. Suggestions are given on its structural diagram, the contours of the operation control and control of the restructuring of electrodynamic objects are shown. The created system for assessing the quality of electrodynamic characteristics can be useful in the design of a wide class of technical systems.

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Keller, Ole, and Lee M. Hively. "Electrodynamics in curved space-time: Free-space longitudinal wave propagation." Physics Essays 32, no. 3 (2019): 282–91. http://dx.doi.org/10.4006/0836-1398-32.3.282.

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Jiménez and Maroto [Phys. Rev. D 83, 023514 (2011)] predicted free-space, longitudinal electrodynamic waves in curved space-time, if the Lorenz condition is relaxed. A general-relativistic extension of Woodside’s electrodynamics [Am. J. Phys. 77, 438 (2009)] includes a dynamical, scalar field in both the potential- and electric/magnetic-field formulations without mixing the two. We formulate a longitudinal-wave theory, eliminating curvature polarization, magnetization density, and scalar field in favor of the electric/magnetic fields and the metric tensor. We obtain a wave equation for the longitudinal electric field for a spatially flat, expanding universe with a scale factor. This work is important, because: (i) the scalar- and longitudinal-fields do not cancel, as in classical quantum electrodynamics; and (ii) this new approach provides a first-principles path to an extended quantum theory that includes acceleration and gravity.

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Lvovich, I. Ya, Ya E. Lvovich, A. P. Preobrazhenskiy, Yu P. Preobrazhenskiy, and O. N. Choporov. "Investigation of the characteristics of complex diffractive structures based on a combined approach." Ural Radio Engineering Journal 5, no. 1 (2021): 49–62. http://dx.doi.org/10.15826/urej.2021.5.1.004.

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The paper is devoted to the study of electrodynamic structures, which include metal and dielectric elements. Simple elements are calculated using the method of integral equations. Their solution is determined by the collocation method and scattered electromagnetic fields. The finitedifference method is required for calculating the equation. For required scattering characteristics of complex electrodynamic structures the choice of diffraction elements is carried out within the framework of a multialternative optimization approach. The individual electrodynamic components are considered first. Then, on their basis, several promising variants of more complex subsystems are formed. It is necessary to apply training information on every stage of modeling. The example of the investigated electrodynamic structure is given. The definition of its characteristics is demonstrated.

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Krylov, V. P. "The effect of electrodynamic parameters of a composite material on the characteristics of the wave reflected from a dielectric layer." Industrial laboratory. Diagnostics of materials 86, no. 5 (2020): 37–42. http://dx.doi.org/10.26896/1028-6861-2020-86-5-37-42.

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Variable electrodynamic parameters of composite materials are determined using the methods providing simultaneous measuring of the free- space permittivity and magnetic permeability within a broad band. Thus, the problems regarding reflection of an electromagnetic wave from the boundary of a dielectric layer and modeling of the phase shift of the wave reflected from a dielectric plate become rather relevant. We report the results of studying the effect of the electrodynamic parameters of composite materials on the characteristics of the wave reflected from a dielectric plate. Analytical expressions are derived for the phase of the reflected wave when an incident plane wave is oriented at an angle to the composite plate with variable electrodynamic parameters. The matrix method is used to obtain the equations for calculating the phase shift of the reflected wave. It is shown that for incident waves with a vector of electric field lying in the plane of incidence (TM waves) and normal to it (TE waves), a jump in the phase shift by π is observed for the electric thickness of the plate multiple of the half-wavelength. A similar phase jump is observed in the case of an incident TM wave near the Brewster angle. An analysis of the frequency dependences of the phase shift, including the phase shift and amplitude drop at a corresponding frequency, as well as data on the effect of losses in the plate material on the phase shift of the reflected wave are presented. The results of studying the angular dependence of the phase shift of the reflected wave in the region of the Brewster angle can be used in solving applied problems of electrodynamics (e.g., when developing a broadband broad-band direction finding device).

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MINEEV, V. P., and T. CHAMPEL. "TWO-COMPONENT SUPERCONDUCTIVITY OF HEAVY FERMIONIC MATERIAL UPt3." International Journal of Modern Physics B 16, no. 20n22 (2002): 3024. http://dx.doi.org/10.1142/s021797920201347x.

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The theory of the Abrikosov lattice structures in the unconventional superconductor UPt3 under magnetic field parallel to the hexagonal crystal axis is presented. Only the two-component E2 superconducting state among the other states of different symmetry is proved to be compatible with the recent observations1 of the flux lattice in the A phase misaligned with crystallographic directions. Unlike to the one-dimensional superconductivity where anisotropic interactions caused by non-local electrodynamic corrections are essential for the vortex ordering the formation of slightly distorted triangular flux lattice in UPt3 due to the two-dimensional nature of its superconducting state can be described already in local electrodynamics.2

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Torromé, Ricardo Gallego. "Some consequences of theories with maximal acceleration in laser–plasma acceleration." Modern Physics Letters A 34, no. 15 (2019): 1950118. http://dx.doi.org/10.1142/s0217732319501189.

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In this paper, we consider classical electrodynamic theories with maximal acceleration and some of their phenomenological consequences for laser–plasma acceleration. It is shown that in a recently proposed higher-order jet theory of electrodynamics, the maximal effective acceleration reachable by a consistent bunch of point-charged particles being accelerated by the wakefield is damped for bunches containing large number of charged particles. We argue that such a prediction of the theory is falsifiable. In the case of Born–Infeld kinematics, laser–plasma acceleration phenomenology provides an upper bound for the Born–Infeld parameter b. Improvements in the beam qualities will imply stronger constraints on b.

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Rybin, V., M. Semynin, S. Rudyi, and Yu Rozhdestvensky. "DIY electrodynamic trap for physics education." Physics Education 57, no. 1 (2021): 015023. http://dx.doi.org/10.1088/1361-6552/ac3b93.

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Abstract We present a simple and affordable method for making a surface electrodynamic trap for microparticles. The principles of electrodynamic trapping of charged particles are discussed and step-by-step instructions on how to make a surface trap are given. In addition to the electrodynamic trap implementation and operation process, options for its further use are proposed. The work may be of interest to physics teachers as a material for practical work, for the formation of students’ skills in performing a physical experiment.

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Tang, Shuang Qing, Dong Ya Yang, and Qiong Qiong Bai. "Orthogonal Testing Optimum Design in Radial Electrodynamic Magnetic Bearings." Applied Mechanics and Materials 397-400 (September 2013): 779–82. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.779.

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The radial electrodynamic magnetic bearings were optimized with the method of orthogonal testing optimization design . In the period of designing the test , the maximum stiffness of the radial electrodynamic magnetic bearings was selected as performance target, the three main factor , inductance, rotate speed, magnetic flux density were also selected as the independent variables, meanwhile validated the relevant damping factor in each test. An optimal solution for the radial electrodynamic magnetic bearings was gained with the range analysis about the result of each test.

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Nalepa, Krzysztof, Wojciech Miąskowski, Marzena Wilamowska-Korsak, and Piotr Puchowski. "Research stand with electrodynamic brake." Mechanik 90, no. 7 (2017): 559–61. http://dx.doi.org/10.17814/mechanik.2017.7.72.

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The article presents the design and characteristics of the eddy current electrodynamic brake used in the system working with an asynchronous motor. The construction of the stand allows the determination of the characteristics of electric motors in combination with the regulated mechanical load in the form of an electrodynamic brake. The presented electrodynamic brake allows precise adjustment of the torque loaded on the tested motor. It allows the load up to 10 Nm at speeds ranging from 100 to 1500 rpm.

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Branco, P. J. Costa. "Development of Two Laboratory Experiments for Teaching Electrodynamic Forces in an Advanced Course in Electromechanical Systems." International Journal of Electrical Engineering & Education 47, no. 4 (2010): 380–92. http://dx.doi.org/10.7227/ijeee.47.4.3.

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In this paper, two experiments on electrodynamic forces designed for students on an advanced course in electromechanical systems are proposed. Details are first given for an experiment involving a pendulum system whose damping is controlled by the electrodynamic forces that are induced in a conducting plate. The pendulum system is modelled using Maxwell's equations and experimental results obtained from the system are compared with those estimated from the model developed. A second experiment is also presented, consisting of a magnetic levitation system where electrodynamic forces are induced in a moving conducting plate by two permanent magnets, resulting in lifting and drag forces on them. These two components of the electrodynamic forces, the lifting and drag forces, are analysed based on the magnetic field distribution, also verifying their dependence on plate speed and lifting height.

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Kong, Zhong Hua, and Ya Dong Jiang. "Calculation of Electrodynamic Forces of Metallized Capacitor’s Leading Wire." Applied Mechanics and Materials 48-49 (February 2011): 284–87. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.284.

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With the development of pulsed power technology, pulsed power equipment requires metallized capacitor with high energy density and large discharging current. Large discharging current makes leading wire pulling form the capacitor, or breaking the leading wire. This paper aims to calculate the electodynamic forces of metallized capacitor’s leading wire under DC, AC and transient state through ANSYS. The results show that electrodynamic force is smaller with annular leading wire, electrodynamic force increase with the frequency increasing under transient current, electrodynamic force increase with the rising time decreasing.

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Sarego, Giulia, Lorenzo Olivieri, Andrea Valmorbida, et al. "Deployment requirements for deorbiting electrodynamic tether technology." CEAS Space Journal 13, no. 4 (2021): 567–81. http://dx.doi.org/10.1007/s12567-021-00349-5.

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AbstractIn the last decades, green deorbiting technologies have begun to be investigated and have raised a great interest in the space community. Among the others, electrodynamic tethers appear to be a promising option. By interacting with the surrounding ionosphere, electrodynamic tethers generate a drag Lorentz force to decrease the orbit altitude of the satellite, causing its re-entry in the atmosphere without using propellant. In this work, the requirements that drive the design of the deployment mechanism proposed for the H2020 Project E.T.PACK—Electrodynamic Tether Technology for Passive Consumable-less Deorbit Kit—are presented and discussed. Additionally, this work presents the synthesis of the reference profiles used by the motor of the deployer to make the tethered system reach the desired final conditions. The result is a strategy for deploying electrodynamic tape-shaped tethers used for deorbiting satellites at the end of their operational life.

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Pokorný, Jiří, A. Jandová, M. Nedbalová, et al. "Mitochondrial Metabolism – Neglected Link of Cancer Transformation and Treatment." Prague Medical Report 113, no. 2 (2012): 81–94. http://dx.doi.org/10.14712/23362936.2015.24.

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Physical processes in living cells were not taken into consideration among the essentials of biological activity, regardless of the fact that they establish a state far from thermodynamic equilibrium. In biological system chemical energy is transformed into the work of physical forces for various biological functions. The energy transformation pathway is very likely connected with generation of the endogenous electrodynamic field as suggested by experimentally proved electrodynamic activity of biological systems connected with mitochondrial and microtubule functions. Besides production of ATP and GTP (adenosine and guanosine triphosphate) mitochondria form a proton space charge layer, strong static electric field, and water ordering around them in cytosol – that are necessary conditions for generation of coherent electrodynamic field by microtubules. Electrodynamic forces are of a long-range nature in comparison with bond and cohesive forces. Mitochondrial dysfunction leads to disturbances of the electromagnetic field; its power and coherence may be diminished, and frequency spectrum altered. Consequently, defective electrodynamic interaction forces between cancer and healthy cells may result in local invasion of cancer cells. Further deformation of interaction forces connected with experimentally disclosed spatial disarrangement of the cytoskeleton and disordered electrodynamic field condition metastatic process. Cancer therapeutic strategy targeting mitochondria may restore normal physiological functions of mitochondria and open the apoptotic pathway. Apoptosis of too much damaged cancer cells was observed. Considerable experience with DCA (dichloroacetate) cancer treatment in humans was accumulated. Clinical trials should assess DCA therapeutic potential and collect data for development of novel more effective drugs for mitochondrial restoration of various cancers.

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SHEYKHI, AHMAD. "THERMODYNAMICAL PROPERTIES OF TOPOLOGICAL BORN–INFELD-DILATON BLACK HOLES." International Journal of Modern Physics D 18, no. 01 (2009): 25–42. http://dx.doi.org/10.1142/s021827180901425x.

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We examine the (n + 1)-dimensional (n ≥ 3) action in which gravity is coupled to the Born–Infeld nonlinear electrodynamic and a dilaton field. We construct a new (n + 1)-dimensional analytic solution of this theory in the presence of Liouville-type dilaton potentials. These solutions, which describe charged topological dilaton black holes with nonlinear electrodynamics, have unusual asymptotics. They are neither asymptotically flat nor (anti)-de Sitter. The event horizons of these black holes can be an (n - 1)-dimensional positive, zero or negative constant curvature hypersurface. We also analyze the thermodynamics and stability of these solutions and disclose the effect of the dilaton and Born–Infeld fields on the thermal stability in the canonical ensemble.

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Yatsyshen, V. V., and A. Yu Gordeev. "Electrodynamic target selection techniques." Journal of «Almaz – Antey» Air and Space Defence Corporation, no. 1 (March 30, 2016): 61–68. http://dx.doi.org/10.38013/2542-0542-2016-1-61-68.

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We examine a new electrodynamic approach to target selection. The study shows that in the case of p-polarisation, a topological portrait of two types of angle reflectors is in a certain sense inverted in relation to that of the s-polarisation case, and consequently, evident polarisation dependence of angle reflector topological portraits may be traced.

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Journal articles on the topic 'Electrodynamic'

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