Results 11 to 20 of about 3,164,882 (277)

A versatile data acquisition system for capturing electromagnetic emissions in VHF band [PDF]

open access: yes, 2007
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This research investigates the occurrence of EM emissions from compressed rock and assesses their value as precursors to earthquakes.
Koulouras, Gregory Evangelos
core   +7 more sources

Electromagnetic flowmeters in multiphase flows [PDF]

open access: yes, 1993
The response of an Electromagnetic Flowmeter to a secondary, nonconducting phase in a continuous conducting phase is investigated. Experiments are carried out on a commercial 2" Foxboro flowmeter with sinusoidal mains field excitation and point ...
Krafft, Rainer
core   +7 more sources

Supertoroidal light pulses as electromagnetic skyrmions propagating in free space [PDF]

open access: yesNature Communications, 2021
Topological complex transient electromagnetic fields give access to nontrivial light-matter interactions and provide additional degrees of freedom for information transfer.
Yi-Jie Shen   +3 more
semanticscholar   +1 more source

Field model of electromechanical phenomena in the linear drive with permanent magnets [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2017
The article presents problems of modelling and analysis of a linear permanent magnet electromagnetic drive taking into account basic physical phenomena. The Comsol Multiphysics environment based on the finite element method (FEM) is used in the magnetic ...
Krzysztof Just, Wojciech Tarnowski
doaj   +1 more source

Electromagnetic chirality: from fundamentals to nontraditional chiroptical phenomena

open access: yesLight: Science & Applications, 2020
Chirality arises universally across many different fields. Recent advancements in artificial nanomaterials have demonstrated chiroptical responses that far exceed those found in natural materials.
J. Mun   +7 more
semanticscholar   +1 more source

Critical Phenomena in the Gravitational Collapse of Electromagnetic Waves. [PDF]

open access: yesPhysical Review Letters, 2019
We numerically investigate the threshold of black-hole formation in the gravitational collapse of electromagnetic waves in axisymmetry. We find approximate power-law scaling ρ_{max}∼(η_{*}-η)^{-2γ} of the maximum density in the time evolution of near ...
T. Baumgarte, C. Gundlach, D. Hilditch
semanticscholar   +1 more source

Diurnal variation of turbulence-related quantities in Lake Garda

open access: yesAdvances in Oceanography and Limnology, 2014
To determine diurnal variations in the physical and biological state of Lake Garda in early spring, high-resolution measurements were made of the vertical distribution of temperature and fluorescence in the upper 100 meters during 5–7 March 2014. In this
W.K. Lenstra   +11 more
doaj   +1 more source

An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra [PDF]

open access: yes, 2005
International audienceWhen the Earth's ionosphere is irradiated by a radiofrequency (RF) electromagnetic wave of sufficiently high power density and tuned to match a natural E- or F-region plasma frequency, ionospheric magnetoionic wave modes may be ...
Khudukon, B. Z.   +36 more
core   +2 more sources

Cooperative Quantum Phenomena in Light-Matter Platforms [PDF]

open access: yesPRX Quantum, 2021
Quantum cooperativity is evident in light-matter platforms where quantum emitter ensembles are interfaced with confined optical modes and are coupled via the ubiquitous electromagnetic quantum vacuum.
M. Reitz, Christian Sommer, C. Genes
semanticscholar   +1 more source

Analyzing electromagnetic structures with curved boundaries on Cartesian FDTD meshes [PDF]

open access: yes, 1998
In this paper, a new finite-difference time-domain (FDTD) algorithm is investigated to analyze electromagnetic structures with curved boundaries using a Cartesian coordinate system. The new algorithm is based on a nonorthogonal FDTD method. However, only
Railton, CJ, Hao, Y
core   +1 more source

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