Results 41 to 50 of about 14,072,652 (376)
Optics Express, 2020 Recently, spatiotemporally modulated metamaterial has been theoretically demonstrated for the design of Doppler cloak, a technique used to cloak the motion of moving objects from the observer by compensating for the Doppler shift.
Baiyang Liu +5 more
semanticscholar +1 more source
Lightweight and secure vehicle track verification scheme via broadcast communication channels
网络与信息安全学报, 2023 In intelligent transportation systems, it is crucial for smart vehicles to broadcast real-time vehicle track messages to coordinate driving decisions and ensure driving safety.However, attackers can manipulate vehicle tracks by modifying timestamps or ...
Zhiqiang NING, Yuanyuan WANG, Chi ZHANG, Lingbo WEI, Nenghai YU, Yue HAO
doaj +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
doaj +1 more source
Annals of Gastroenterological Surgery, Volume 7, Issue 1, Page 182-189, January 2023., 2023 Since celiac artery occlusion represents a common attributable aetiology for these aneurysms, restoration of blood flow to the regions supplied by the celiac artery should also be taken into account when designing a treatment plan. Here, we present 4 cases of PDA aneurysms coexisting with coeliac artery occlusion, all of which were managed with bypass ...
Koji Kubota +4 more
wiley +1 more source
Guidelines for ultrasound examination in ophthalmology. Part III: Color Doppler ultrasonography
Journal of Ultrasonography, 2019 The aim of this article was to present the possibilities of use and application of color-coded Doppler ultrasonography in the diagnosis of various diseases of the eyeball and orbit which result from vascular disorders. Color-coded Doppler ultrasonography
Monika Modrzejewska
doaj +1 more source
Performance Evaluation of OTFS-NOMA Scheme for High Mobility Users
Sakarya University Journal of Computer and Information Sciences, 2023 Orthogonal Time Frequency Space (OTFS) is a promising approach which is widely employed in sixth generation (6G) wireless network systems. Because of its superior performance in high-mobility environments, OTFS modulation has received a lot of attention ...
Arif Başgümüş +2 more
doaj +1 more source
Sound and Light Doppler Effects [PDF]
SSRN Electronic Journal, 2022 20 pages, 13 figures, 2 ...
openaire +2 more sources
Reconfigurable Intelligent Surfaces for Doppler Effect and Multipath Fading Mitigation [PDF]
Frontiers in Communications and Networks, 2019 Owing to the envisioned new use-cases, such as immersive virtual reality and high-fidelity mobile hologram, and their potential challenging new requirements for future wireless networks, extensive research has already started on 6G and beyond wireless ...
E. Başar, I. Akyildiz
semanticscholar +1 more source
Sound and light Doppler effects [PDF]
arXiv, 2021 Although electromagnetic and acoustic waves profoundly differ in their nature, comparing their Doppler effects is instructive and reveals persistent conceptual traps. The principle of the Doppler effect was presented by Christian Doppler in 1842 long before the advent of relativity theory, but while the relativistic Doppler effect is now well ...
arxiv