Results 11 to 20 of about 345,531 (342)

The evaluation of swallowing in patients with spinocerebellar ataxia and oropharyngeal dysphagia: A comparison study of videofluoroscopic and sonar doppler

open access: yesInternational 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

Correcting the Doppler Effect

open access: yesScience & 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

The influence of frequency and amplitude modulation due to the sound source movement on radiated sound characteristics

open access: yesNihon Kikai Gakkai ronbunshu, 2021
The variation of the noise metrics of a group of sound sources due to its movement at a constant velocity along a straight track is discussed in the paper.
Yusuke MAKINO, Yasushi TAKANO
doaj   +1 more source

The Evaluation of Light Conditions Influence and Corrections upon Doppler Blood Perfusion Imagining

open access: yesAdvances in Electrical and Electronic Engineering, 2016
The paper deals with theoretical and experimental research of the ambient light influence upon the measuring reliability of the perfusion maps by the laser Doppler method using the device PeriScan PIM 3.
Jan Kubicek   +4 more
doaj   +1 more source

ENERGY LOSS OF CHARGED PARTICLE ON THE WAVES EXCITATION IN SEMICONDUCTOR CYLINDER WITH TWO-DIMENSIONAL ELECTRON GAS ON THE SIDE SURFACE [PDF]

open access: yesРадиофизика 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

Missing Transverse-Doppler Effect in Time-Dilation Experiments with High-Speed Ions [PDF]

open access: yes, 2010
Recent experiments with high-speed ions have investigated potential deviations from the time-dilation predicted by special relativity (SR). The main contribution of this article is to show that the SR predictions are matched by the experimental results ...
C. Novotny   +13 more
core   +2 more sources

Robust method for ship recognition based on ISAR imaging using 3D model

open access: yesThe Journal of Engineering, 2019
This study develops a robust method for ship target recognition, based on inverse synthetic aperture radar (ISAR) image matching with the template of 3D model.
Sudao D. Xie, M.Y. Pan, D.S. Li
doaj   +1 more source

Moving target detection based on velocity compensation methods in a coherent continuous wave lidar

open access: yesThe Journal of Engineering, 2019
Light Detection and Ranging (lidar) technology has been applied in military and civil areas and shows great potential. However, in coherent lidar detection, significant Doppler Effect and velocity uncertainty result a bad influence on moving target ...
Huixin Huang   +3 more
doaj   +1 more source

Doppler effect in the oscillator radiation process in the medium [PDF]

open access: yes, 2011
The purpose of this paper is to investigate the radiation process of the charged particle passing through an external periodic field in a dispersive medium.
Gevorgian, Lekdar, Vardanyan, Valeri
core   +2 more sources

Difference in determination of surface wave magnitude of the M7.8 Kermadec Island earthquake on March 5,2021 in New Zealand

open access: yes地震科学进展, 2021
A magnitude M7.8 earthquake struck Kermadec Island,New Zealand on March 5,2021. In this study we determined surface wave magnitude using 692 stations from USGS global networks and 112 stations from China global earthquake monitoring system,then analyzed ...
Wenze Deng
doaj   +1 more source

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