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The Structure of an Electromagnetic Field [PDF]
Proceedings of the National Academy of Sciences, 1918 This elementary field corresponds to a state of affairs in which electric charges of a concentrated form are created and travel along straight lines with the velocity of light, the directions of these lines being specified by the different values of the unit vector s.
H. Bateman
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The Electromagnetic Field and Curvature [PDF]
Proceedings of the National Academy of Sciences, 1923 G. Y. Rainich
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Scientific Reports, 2021 We demonstrate halving the record-low loss of interconnection between a nested antiresonant nodeless type hollow-core fiber (NANF) and standard single-mode fiber (SMF).
Dmytro Suslov +9 more
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Standalone photovoltaic and battery microgrid design for rural areas
Energy Exploration & Exploitation, 2022 The remote location and many islands in Africa are experiencing a big power shortage and blackouts and they greatly necessitate electric power from standalone photovoltaic microgrid. In Rwanda, off-grid solar systems are at their infancy level and their
Cyprien Nsengimana +3 more
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Deep reflector prime focus feed for space communication
The Journal of Engineering, 2021 In this paper, design of a prime‐focus feed for a deep reflector, Earth–Moon–Earth space communication system is described. The feed is based on a circular waveguide equipped with two chokes in order to minimise sidelobes and illuminate the deep dish ...
Rastislav Galuscak +4 more
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TORSION AND THE ELECTROMAGNETIC FIELD [PDF]
International Journal of Modern Physics D, 1999 In the framework of the teleparallel equivalent of general relativity, we study the dynamics of a gravitationally coupled electromagnetic field. It is shown that the electromagnetic field is able not only to couple to torsion, but also, through its energy–momentum tensor, produce torsion.
De Andrade, V. C., Pereira, J. G.
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Invariants of the electromagnetic field [PDF]
Journal of Mathematical Physics, 2014 We present a constructive proof that, in electrodynamics, all of the gauge-invariant Lorentz scalars and pseudoscalars can be expressed as functions of the quadratic ones.
C.A. Escobar, L. F. Urrutia
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Simultaneously realizing thermal and electromagnetic cloaking by multi-physical null medium [PDF]
Opto-Electronic Science Vol. 3 No. 2 230027, 2024, 2023 Simultaneously manipulating multiple physical fields plays an important role in the increasingly complex integrated systems, aerospace equipment, biochemical productions, etc. For on-chip systems with high integration level (e.g., electronic/photonic chips and radio-frequency/microwave circuits), where both electromagnetic information/energy ...
arxiv +1 more source
Frequencies of astrophysical jets and gravitational strengths in the octonion spaces [PDF]
International Journal of Modern Physics D, Vol.31, No.4, id.
2250024, 2022, 2022 The paper focuses on applying the octonions to explore the electromagnetic and gravitational equations in the presence of some material media, exploring the frequencies of astrophysical jets. Maxwell was the first to use the algebra of quaternions to describe the electromagnetic equations. This method encourages scholars in adopting the quaternions and
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VSI electromagnetic fields [PDF]
The Fourteenth Marcel Grossmann Meeting, 2017 A $p$-form $F$ is VSI (i.e., all its scalar invariants of arbitrary order vanish) in a $n$-dimensional spacetime if and only if it is of type N, its multiple null direction $l$ is "degenerate Kundt", and $ _{l}F=0$. This recent result is reviewed in the present contribution and its main consequences are summarized.
Ortaggio, M. (Marcello) +1 more
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