Results 1 to 10 of about 1,838,256 (154)

Electromagnetic phenomena analysis in brushless DC motor with speed control using PWM method

open access: yesOpen Physics, 2017
Field-circuit model of a brushless DC motor with speed control using PWM method was developed. Waveforms of electrical and mechanical quantities of the designed motor with a high pressure vane pump built in a rotor of the motor were computed. Analysis of
Ciurys Marek Pawel
doaj   +3 more sources

Recent Advances and Challenges in the Seismo-Electromagnetic Study: A Brief Review

open access: yesRemote Sensing, 2022
Due to their potential application in earthquake forecasting, seismo-electromagnetic phenomena were intensively studied for several decades all over the world.
Hongyan Chen, Peng Han, Katsumi Hattori
doaj   +2 more sources

On the fluctuation spectra of seismo-electromagnetic phenomena [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2011
In order to increase the credibility on the presence of electromagnetic phenomena associated with an earthquake, we have suggested the importance of the modulation (or fluctuation) seen in the time-series data of any seismogenic effects.
M. Hayakawa
doaj   +2 more sources

Rethinking earthquake-related DC-ULF electromagnetic phenomena: towards a physics-based approach [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2011
Numerous electromagnetic changes possibly related with earthquakes have been independently reported and have even been attempted to apply to short-term prediction of earthquakes.
Q. Huang
doaj   +2 more sources

On the role of electromagnetic phenomena in some atmospheric processes [PDF]

open access: yesNonlinear Processes in Geophysics, 2013
A crucial part of electromagnetic phenomena in many atmospheric processes is verified by systematized data. The multilayered charged system of clouds represents some dynamically equilibrium structure kept by the ionic and polarization forces.
S. N. Artekha, A. V. Belyan
doaj   +3 more sources

Seismo-electromagnetic phenomena in the western part of the Eurasia-Nubia plate boundary [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2011
This paper presents a work that aims to monitor seismo-electromagnetic phenomena in the Western Part of the Eurasia-Nubia Plate Boundary. This region has a significant tectonic activity combined with relatively low electromagnetic noise levels, rendering
H. G. Silva   +10 more
doaj   +2 more sources

Anomalous radon emanation linked to preseismic electromagnetic phenomena [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2007
Anomalous emanation of radon (<sup>222</sup>Rn) was observed preceding large earthquakes and is considered to be linked to preseismic electromagnetic phenomena (e.g.
Y. Omori   +6 more
doaj   +2 more sources

Multi Physical Field Simulation of Quadrupole Compound Rail Electromagnetic Launcher [PDF]

open access: yesHangkong bingqi, 2022
In the working process of quadrupole composite rail electromagnetic launcher, there will be many phenomena such as structural deformation, temperature change and electromagnetic interference.
Ren Shida, Feng Gang, Liu Shaowei, Li Tengda, Bai Nan
doaj   +1 more source

Loop-like kink breather and its transition phenomena for the Vakhnenko equation arising from high-frequency wave propagation in electromagnetic physics

open access: yesApplied Mathematics Letters, 2021
We report a novel type of breather by studying the Vakhnenko equation (VE) describing high-frequency wave (HFW) propagation in electromagnetic physics.
Bang-Qing Li
semanticscholar   +1 more source

Charged particle motion and radiation in strong electromagnetic fields [PDF]

open access: yesReviews of Modern Physics, 2021
The dynamics of charged particles in electromagnetic fields is an essential component of understanding the most extreme environments in our Universe. In electromagnetic fields of sufficient magnitude, radiation emission dominates the particle motion and ...
A. Gonoskov   +3 more
semanticscholar   +1 more source

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