Results 1 to 10 of about 601,268 (162)

Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber

open access: yesScientific 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
doaj   +1 more source

Standalone photovoltaic and battery microgrid design for rural areas

open access: yesEnergy 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
doaj   +1 more source

Deep reflector prime focus feed for space communication

open access: yesThe 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
doaj   +1 more source

TORSION AND THE ELECTROMAGNETIC FIELD [PDF]

open access: yesInternational 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.
openaire   +4 more sources

Invariants of the electromagnetic field [PDF]

open access: yesJournal 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
openaire   +3 more sources

Schwinger effect and backreaction in de Sitter spacetime [PDF]

open access: yes, 2016
We consider the particle-antiparticle pairs produced by both a strong electric field and de Sitter curvature. We investigate in 1 + 1 D the backreaction of the pairs on the electromagnetic field.
Stahl, Clément, Xue, She-Sheng
core   +6 more sources

VSI electromagnetic fields [PDF]

open access: yesThe 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
openaire   +5 more sources

Polarization Division Multiplexing-Based Hybrid Microwave Photonic Links for Simultaneous mmW and Sub-6 GHz Wireless Transmissions

open access: yesIEEE 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
doaj   +1 more source

Electromagnetic fields in jets [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2007
8 pages, 5 figures.
Donald Lynden-Bell, Blake D. Sherwin
openaire   +4 more sources

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