Results 21 to 30 of about 373,441 (291)

Excitation of plasma waves by unstable photoelectron and thermal electron populations on closed magnetic field lines in the Martian ionosphere [PDF]

open access: yesAnnales Geophysicae, 2005
It is argued that anisotropic electron pitch angle distributions in the closed magnetic field regions of the Martian ionosphere gives rise to excitation of plasma instabilities.
N. Borisov, N. Borisov, E. Nielsen
doaj   +1 more source

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

Radiofrequency pulse modulation of the penile dorsal nerve for the treatment of premature ejaculation: evaluation of effectiveness

open access: yesВестник урологии, 2023
Introduction.  Premature ejaculation (PE) is the second most common male sexual dysfunction with a significant negative impact on quality of life. A significant number of conservative and surgical methods for the treatment of PE are proposed, but their ...
Ya. B. Mirkin   +3 more
doaj   +1 more source

Cryogenic Systems for Astronomical Research in the Special Astrophysical Observatory of the Russian Academy of Sciences

open access: yesPhotonics, 2023
This article presents the main results and new plans for the development of receivers which are cooled cryogenically to deep cryogenic temperatures and used in optical and radio astronomy research at the Special Astrophysical Observatory of the Russian ...
Yurii Balega   +17 more
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

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

Space-borne radar observation of near-surface wind effect on anomalously highly-directional backscattering of radio waves from aeolian processes of sand and dust transporting in desert regions [PDF]

open access: yesРадиофизика и электроника, 2020
Subject and purpose. The purpose of this work is to study the effect of wind on the anomalous scattering of radio waves during aeolian processes of sand and dust transporting. Мethods and methodology. The article analyzes the spatial variations of the
D.M. Bychkov   +4 more
doaj   +1 more source

Dynamics of electron beams in the solar corona plasma with density fluctuations [PDF]

open access: yes, 2001
The problem of beam propagation in a plasma with small scale and low intensity inhomogeneities is investigated. It is shown that the electron beam propagates in a plasma as a beam-plasma structure and is a source of Langmuir waves.
Benz   +32 more
core   +2 more sources

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

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