Results 21 to 30 of about 14,072,652 (376)
Brain magnetic resonance imaging predictors in anti‐N‐methyl‐D‐aspartate receptor encephalitis
Annals of Clinical and Translational Neurology, Volume 9, Issue 12, Page 1974-1984, December 2022., 2022 Abstract Objective Brain magnetic resonance imaging (MRI) findings in anti‐N‐methyl‐D‐aspartate receptor (NMDAR) encephalitis are nonspecific and rarely have obvious associations with clinical characteristics and outcomes. This study aimed to comprehensively describe the MRI features of patients with NMDAR encephalitis, examine their associations with ...
Ying‐Ying Zhao +8 more
wiley +1 more source
On Ultrasonic MTI Measurement of Velocity Profiles in Blood-Flow [PDF]
Modeling, Identification and Control, 1981 A theoretical analysis of Doppler frequency estimators proposed to be used in ultrasonic MTI measurements of velocity profiles in blood flow, is given. The estimators give an output in form of a single analogue voltage and the relation of the output to ...
Bjørn A.J. Angelsen +1 more
doaj +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
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
doaj +1 more source
Sensors, 2021 Connected objects are deployed all over the world. Thus, they are contributing to improving communications. In urban areas, technological challenges are gradually being overcome, and advances in this area are exponential.
Laurent Ferrier +3 more
doaj +1 more source
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
doaj +3 more sources
ENERGY LOSS OF CHARGED PARTICLE ON THE WAVES EXCITATION IN SEMICONDUCTOR CYLINDER WITH TWO-DIMENSIONAL ELECTRON GAS ON THE SIDE SURFACE [PDF]
Радиофизика и электроника, 2015 One of the urgent problems of modern radiophysics is the study of the fundamental properties of solid-state structures that contain nanodimension fragments.
A .V. Dormidontov +2 more
doaj +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
doaj +1 more source
IEEE Communications Letters, 2021 The filterbank multicarrier (FBMC) waveform has better properties in spectral as compared to the Orthogonal Frequency Division Multiplexing (OFDM) and it exhibits good anti-interference performance.
Gang Qiao +4 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
doaj +1 more source