A Brief History of Electricity, Magnetism, and Radio Science in Finland
, 2021 This letter reviews historical milestones concerning the studies of electricity, magnetism, and radio science in Finland. Even if the first university on Finnish ground started as early as 1640, the first dissertation concerning electricity was not ...
Sihvola, Ari
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An Automation System for Controlling Streetlights and Monitoring Objects Using Arduino
Sensors, 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
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ENHANCEMENT OF BANDWIDTH AND BEAM FORMING ANTENNA ARRAYS IN 5G CELLULAR COMMUNICATION NETWORKS
ICTACT 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
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Rise and fall of electron temperatures: Ohmic heating of ionospheric electrons from underdense HF radio wave pumping [PDF]
, 2010 Here we present electron temperature variations observed with incoherent scatter radar during a European Incoherent Scatter Scientific Association Heating experiment with high-frequency (HF) radio wave transmission at frequencies above the peak ...
Gustavsson, B. +7 more
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Effects of high-latitude atmospheric gravity wave disturbances on artificial HF radar backscatter [PDF]
, 2006 International audienceObservations of HF radar backscatter from artificial field-aligned irregularities in an ionosphere perturbed by travelling disturbances due to atmospheric gravity waves are presented.
Tim K. Yeoman (7583066) +14 more
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Numerical studies of the parameters of the perturbed region formed in the lower ionosphere under the action of a directed radio waves flux from a terrestrial source [PDF]
Компьютерные исследования и моделирование, 2018 The paper presents a physico-mathematical model of the perturbed region formed in the lower D-layer of the ionosphere under the action of directed radio emission flux from a terrestrial stand of the megahertz frequency range, obtained as a result of ...
Daria Sergeevna Moiseeva +2 more
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An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra [PDF]
, 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
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Boundary Determination of Concealed Structure Region Based on Electromagnetic Tomography
Meikuang Anquan, 2020 To further explore the root cause of the high roof collapse phenomenon of the 1303 working face, the high-precision tunnel detection of the 1303 working face was carried out by electromagnetic wave fixed point method, and three sets of structural ...
QU Xiaobing, BAO Junrui
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Hijacking emergency granulopoiesis: Neutrophil ontogeny and reprogramming in cancer
Molecular Oncology, EarlyView.Neutrophils are highly plastic innate immune cells; their functions in cancer extend beyond the tumour microenvironment. This Review summarises current understanding of neutrophil maturation and heterogeneity and highlights tumour‐induced granulopoiesis as a systemic programme that expands immature, immunosuppressive neutrophils via tumour‐derived ...
Gabriela Marinescu, Yi Feng
wiley +1 more source
, 2008 We present a theoretical and numerical study of linear mode conversion of lower hybrid waves interacting with short-scale density striations in the Earth's ionosphere.
Papadopoulos, K. +3 more
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