Results 11 to 20 of about 14,072,652 (376)

Rotational Doppler Effect: A Review

open access: yesAnnals of Physics, 2023
Generally, the linear motion between the source of a wave and an observer leads to a linear Doppler effect. It is associated with the linear momentum of the wave. For electromagnetic beams having a circular polarization or an azimuthal phase distribution,
O. Emile, J. Emile
semanticscholar   +1 more source

The Rotational Doppler Effect of Twisted Photons in Scattered Fields

open access: yesLaser & Photonics Reviews, 2023
Along with broad applications of the linear Doppler effect, the rotational Doppler effect (RDE) of a structured light source carrying orbital angular momentum (OAM) has attracted significant attention for applications ranging from optical sensors to ...
Yanwang Zhai   +5 more
semanticscholar   +1 more source

USE OF DIFFERENT LIBRARIES IN THE ANALYSIS OF THE DOPPLER MEASUREMENTS OF THE SEFOR REACTOR: ASSESSMENT OF THE DOPPLER EFFECT OF THE ASTRID CORE [PDF]

open access: yesEPJ Web of Conferences, 2021
For the next generation of fast reactors, global objectives are required in terms of safety, sustainability, waste minimization and non-proliferation issues. Concerning safety issues, particular efforts have been made in order to obtain core designs that
Foissy M., Rimpault G., Buiron L.
doaj   +1 more source

Phase-Induced Frequency Conversion and Doppler Effect With Time-Modulated Metasurfaces [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2020
Metasurfaces consisting of electrically thin and densely packed planar arrays of subwavelength elements enable an unprecedented control of the impinging electromagnetic fields.
D. Ramaccia   +4 more
semanticscholar   +1 more source

THE INERTIA OF LIGHT. VERIFICATION OF NEWTON’S SECOND LAW BY ACONFINED FLOW OF RADIATION IN A REFLECTIVE CAVITY

open access: yesAnales (Asociación Física Argentina), 2023
In 1904, the Austrian physicist Fritz Hasenöhrl examined by means of mental experiments the black body radiation in a reflecting cavity. By calculating the work required to keep the cavity moving at constant velocity in opposition to the radiation ...
C. M. Figueroa, S. Saracho
doaj   +1 more source

Rotational object detection at noncoaxial light incidence based on the rotational Doppler effect.

open access: yesOptics Express, 2022
The rotational Doppler effect (RDE) of optical vortex which can be used to detect the rotation speed, has become a well-known phenomenon and a hot topic of research in recent years.
Song Qiu   +4 more
semanticscholar   +1 more source

Application value of contrast‐enhanced ultrasound in preoperative localization of microwave ablation for primary hyperparathyroidism

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Background Ultrasonography (US) and 99mTechnetium‐sestamibi scintigraphy (99mTc‐MIBI) are currently first‐line imaging modalities to localize parathyroid adenomas with sensitivities of 80% and 84%, respectively. Therefore, finding other modalities to further improve the diagnostic accuracy for preoperative localization is critically needed ...
Fangyi Liu   +7 more
wiley   +1 more source

Aircraft Detection Using Phase-Sensitive Optical-Fiber OTDR

open access: yesSensors, 2021
Aircraft detection plays a vital role in aviation management and safe operation in the aviation system. Phase-Sensitive Optical Time Domain Reflectometry (Φ-OTDR) technology is a prevailing sensing method in geophysics research, structure inspection ...
Yunpeng Cai   +4 more
doaj   +1 more source

Rotational Doppler Effect in Vortex Light and Its Applications for Detection of the Rotational Motion

open access: yesPhotonics, 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

Channel Estimation for Reconfigurable Intelligent Surface-Assisted Wireless Communications Considering Doppler Effect [PDF]

open access: yesIEEE 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

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