Results 91 to 100 of about 14,072,652 (376)
Manual of Transcranial Doppler Ultrasonography
Korean Journal of Clinical Laboratory ScienceTranscranial Doppler (TCD) ultrasound is a crucial non-invasive tool for assessing cerebral blood flow and is widely used to diagnose and monitor cerebrovascular diseases.
Ho Tae JEONG, Soo Na JEON, Sol HAN
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Research Advances on the Rotational Doppler Effect of Vortex Electromagnetic Waves
Leida xuebao, 2021 Traditional radars can detect moving targets using the Doppler effect. However, traditional radars have shadow areas in detecting the angular motion of the rotating targets.
Zhongyi GUO +3 more
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A Method of Ultrasonic Finger Gesture Recognition Based on the Micro-Doppler Effect
Applied Sciences, 2019 With the popularity of small-screen smart mobile devices, gestures as a new type of human–computer interaction are highly demanded. Furthermore, finger gestures are more familiar to people in controlling devices.
Qinglin Zeng +3 more
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Advanced Materials Interfaces, EarlyView.Nanocrystalline thin‐films of lanthanum chromite exhibit extraordinary properties of fast oxygen kinetics. These properties are due to the peculiar chemistry of grain boundaries and can be harnessed for fabricating symmetric electrochemical devices with self‐healing properties. Abstract While grain boundary engineering is attracting great interest as a
Federico Baiutti +16 more
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Advanced Materials Interfaces, EarlyView.The functionality of nuclear structural materials, sensors, and microelectronics in radiation environments relies on understanding defect generation and evolution processes in oxide layers. The initial radiation response of Fe3O4 epitaxial thin films is characterized by the formation of large vacancy clusters, but these defects do not lead to lattice ...
Tiffany C. Kaspar +11 more
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A Theoretical-Study of the Scattering of Ultrasound from Blood [PDF]
Modeling, Identification and Control, 1981 A theoretical treatment of the scattering of ultrasound from blood is given, assuming that the blood behaves essentially as a continuum. The scattering then arises from fluctuations in the mass density and compressibility of the blood, which is caused by
Bjørn A.J. Angelsen
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Advanced Materials Technologies, EarlyView.This review provides an in‐depth overview of the design principles and optimization strategies for terahertz (THz) metamaterials (MMs) sensors based on the dielectric perturbation theory. Various structures and methods are explored to enhance sensor performance, focusing on improving sensitivity and Q‐factor.
Lei Cao +9 more
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Известия высших учебных заведений России: Радиоэлектроника, 2018 Narrowband approximation of Doppler effect by a frequency shift is inappropriate for some problems of radiolocation, hydro acoustics or passive location.
I. V. Gogolev
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Exact classical Doppler effect derived from the photon emission process [PDF]
arXiv, 2016 The concept of photon is not necessary only applied to the relativistic Doppler theory. It may also work well for classical theory. As conservation of momentum and energy are physical laws, if applying these laws gives the exact relativistic Doppler effect, it should also give the exact classical Doppler effect.
arxiv
Advanced Photonics Research, EarlyView.Telecom‐band quantum light sources have significant practical applications in this domain. This study reports the high‐performance telecom‐wavelength biphoton generation from a hot vapor cell of 87Rb. For the first time, the beat phenomenon in the autocorrelation function of the signal photon with telecom wavelength due to the velocity‐selective ...
Hansol Jeong +3 more
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