Results 21 to 30 of about 15,818,813 (324)
Photonics, 2022 The linear Doppler effect has been widely used to detect the translational motion of objects. However, it suffers difficulties in measuring the angular motion of a rotating target. In recent years, the rotational Doppler effect based on a vortex beam has
Tian-Yu Cheng +5 more
semanticscholar +1 more source
On the symmetries of electrodynamic interactions
Science & Philosophy, 2022 While mechanics was developed under the idea of reciprocal action (interactions), electromagnetism, as we know it today, takes a form more akin to unilateral action.
Hernán Gustavo Solari +1 more
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Chipless RFID Based on Micro-Doppler Effect
IEEE transactions on microwave theory and techniques, 2022 This article demonstrates how motion effect can be exploited to read moving chipless radio frequency identification (RFID) tags at larger distances compared to what has been reached without taking into account the movement.
Ashkan Azarfar, N. Barbot, E. Perret
semanticscholar +1 more source
Rotational Doppler Effect With Vortex Beams: Fundamental Mechanism and Technical Progress
Frontiers of Physics, 2022 Structured light beams such as optical vortices can carry the orbital angular momentum (OAM) with an unbounded quantum number. Recent years have witnessed a growing interest in the rotational Doppler effect with vortex light.
Song Qiu +5 more
semanticscholar +1 more source
Science & Philosophy, 2023 Christian Doppler, an Austrian physicist, described in 1842 the apparent change in frequency of a wave when motion of the source or the observer is involved. Named after him, this change in observational frequencies is known as the Doppler Effect.
Denis Thomas
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International Archives of Otorhinolaryngology, 2013 Sumarry Introduction: Spinocerebellar ataxia (SCA) is a degenerative disease that can cause loss of coordination of voluntary muscle movement such as that required for swallowing.
Edna Márcia da Silva Abdulmassih +2 more
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Simple Experiment of Doppler Effect Using Smartphone Microfon Sensor
Jurnal Penelitian Fisika dan Aplikasinya, 2020 Doppler effect is the physical phenomena in which the emitted frequency is a source of change at a time when accepted by the detector due to relative movement of the detector towards the source of the wave or vice versa.
Adam Malik +4 more
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Channel Estimation for Reconfigurable Intelligent Surface-Assisted Wireless Communications Considering Doppler Effect [PDF]
IEEE Wireless Communications Letters, 2020 In wireless systems aided by reconfigurable intelligent surfaces (RISs), channel state information plays a pivotal role in achieving the performance gain of RISs.
Shu Sun, Hangsong Yan
semanticscholar +1 more source
Modeling of Monopulse Radar Signals Reflected from Ground Clutter in a Time Domain Considering Doppler Effects [PDF]
Journal of Electromagnetic Engineering and Science, 2020 To evaluate the performance of a monopulse radar system, it is necessary to accurately model radar return signals from the ground surface in a time domain.
Jeong-Hun Nam +4 more
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Non-invasive Ultrasound Doppler Effect Based Method of Liquid Flow Velocity Estimation in Pipe [PDF]
Archives of Acoustics, 2023 This paper discusses the estimation of flow velocity from a multi-sensor scenario. Different estimation methods were used, which allow the effective measurement of the actual Doppler shift in a noisy environment, such as water with air bubbles, and on ...
Pawel Biernacki +2 more
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