Results 21 to 30 of about 382,834 (345)

Nature of microstructure in pulsar radio emission [PDF]

open access: yes, 2000
We present a model for microstructure in pulsar radio emission. We propose that micropulses result from the alteration of the radio wave generation region by nearly transverse drift waves propagating across the pulsar magnetic field and encircling the ...
Khechinashvili, David   +3 more
core   +2 more sources

Electromagnetic manifestation of the lithosphere in the ULF-VLF range

open access: yesГеофизический журнал, 2012
Brief analysis of the current state of research in natural electromagnetic field at the Earth’s surface in the SLF-VLF range has been conducted. A set of estimations of field levels ratios of lithospheric and storm origin has been made. It has been shown
V. N. Uvarov
doaj   +1 more source

Scattering Characteristics of Targets above a Rough Surface in SAR Images

open access: yesInternational Journal of Antennas and Propagation, 2013
The modeling, simulation, and analysis of target characteristics are essential to a synthetic aperture radar (SAR) image-based autotarget recognition (ATR) system.
Bo Zhao, Tie Jun Cui
doaj   +1 more source

A Statistical Analysis of the Solar Phenomena Associated with Global EUV Waves [PDF]

open access: yes, 2017
Solar eruptions are the most spectacular events in our solar system and are associated with many different signatures of energy release including solar flares, coronal mass ejections, global waves, radio emission and accelerated particles. Here, we apply
Carley, Eoin P.   +4 more
core   +2 more sources

ENHANCEMENT OF BANDWIDTH AND BEAM FORMING ANTENNA ARRAYS IN 5G CELLULAR COMMUNICATION NETWORKS

open access: yesICTACT Journal on Communication Technology, 2022
In general, an antenna is an interface that transmits signal data and receives incoming signal data. The radio waves received through this interface help to do the necessary things for the transmitter and receiver circuit systems used there. Also a radio
Mohammad Shahnawaz Shaikh   +3 more
doaj   +1 more source

Stopping Frequency of Type III Solar Radio Bursts in Expanding Magnetic Flux Tubes [PDF]

open access: yes, 2015
Understanding the properties of type III radio bursts in the solar corona and interplanetary space is one of the best ways to remotely deduce the characteristics of solar accelerated electron beams and the solar wind plasma.
Kontar, Eduard P., Reid, Hamish A. S.
core   +2 more sources

Spoof surface plasmon polaritons supported by ultrathin corrugated metal strip and their applications

open access: yesNanotechnology Reviews, 2015
In this review, we present a brief introduction on the spoof surface plasmons supported on corrugated metallic plates with nearly zero thickness. We mainly focus on the propagation characteristics of spoof surface plasmon polaritons (SPPs), excitation of
Gao Xi, Cui Tie Jun
doaj   +1 more source

Source Regions of the Type II Radio Burst Observed During a CME-CME Interaction on 2013 May 22

open access: yes, 2016
We report on our study of radio source regions during the type II radio burst on 2013 May 22 based on direction finding (DF) analysis of the Wind/WAVES and STEREO/WAVES (SWAVES) radio observations at decameter-hectometric (DH) wavelengths.
M. J. Reiner   +4 more
core   +1 more source

An Automation System for Controlling Streetlights and Monitoring Objects Using Arduino

open access: yesSensors, 2018
We present an Arduino-based automation system to control the streetlights based on solar rays and object’s detection. We aim to design various systems to achieve the desired operations, which no longer require time-consuming manual switching of the
Zain Mumtaz   +7 more
doaj   +1 more source

Physical processes behind the alignment effect

open access: yes, 2004
The radio/optical alignment effect for small powerful radio galaxies has been shown to be produced by shock waves formed by the interaction of the head of the jet and/or cocoon with clouds embedded in the interstellar/intergalactic medium.
Hidalgo, JC, Mendoza, S
core   +1 more source

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