Results 1 to 10 of about 741,941 (334)
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.
Escobar, C. A., Urrutia, L. F.
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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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IEEE Photonics Journal, 2020 A new hybrid microwave photonic link based on a polarization division multiplexing Mach-Zehnder modulator (PDM-MZM) is proposed. The link enables co-transmission of millimeter-wave (mmW) and sub-6 GHz wireless signals over a seamless single-mode fiber ...
Dong-Nhat Nguyen +7 more
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Universal electromagnetic fields [PDF]
Classical and Quantum Gravity, 2018 We study universal electromagnetic (test) fields, i.e., p-forms fields F that solve simultaneously (virtually) any generalized electrodynamics (containing arbitrary powers and derivatives of F in the field equations) in n spacetime dimensions. One of the main results is a sufficient condition: any null F that solves Maxwell's equations in a Kundt ...
Vojtěch Pravda +3 more
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Applied Sciences, 2023 The performance of low-voltage circuit breaker overload protection degrades slowly during service, and the service state cannot be simply described as a normal state or a fault state.
Kui Li, Xianfeng Peng, Bokai Hu
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