Results 31 to 40 of about 118,033 (340)

Effect of Hematocrit upon the Shift in Doppler Frequency

open access: yesExperimental Biology and Medicine, 1971
ConclusionOver a wide range of erythrocyte concentration (10-68 vol%) there is not an appreciable change in the Doppler frequency shift when blood flow conditions and temperature remain constant.
Clarence P. Cain, David D. Michie
openaire   +3 more sources

Optical angular momentum in a rotating frame [PDF]

open access: yes, 2014
It is well established that light carrying orbital angular momentum (OAM) can be used to induce a mechanical torque causing an object to spin. We consider the complementary scenario: will an observer spinning relative to the beam axis measure a change in
Allen   +16 more
core   +1 more source

Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT

open access: yesIEEE Access, 2019
In the low earth orbit (LEO) satellite Internet of Things (IoT), the IoT devices can be distributed in remote areas (e.g., desert, ocean, and forest) for some special applications, where they are unable to have direct terrestrial network accesses and can
Chao Yang   +3 more
doaj   +1 more source

New bounds of wide‐gap frequency‐hopping sequences with frequency shift

open access: yesElectronics Letters, 2022
With the rapid development of radar, the phenomenon of Doppler frequency shift is not rare. Frequency shift needs to be considered in order to accurately calculate the mutual interference between signals. Meanwhile, to reduce interference to the received
Qianhui Wei, Hongyu Han
doaj   +1 more source

Laryngeal Nerve Activity During Pulse Emission in the CF-FM Bat, Rhinolophus ferrumequinum. I. Superior Laryngeal Nerve (External Motor Branch) [PDF]

open access: yes, 1981
The activity of the external (motor) branch of the superior laryngeal nerve (SLN), innervating the cricothyroid muscle, was recorded in the greater horseshoe bat,Rhinolophus ferrumequinum.
A Novick   +12 more
core   +1 more source

Doppler shift simulation of scattered HF signals during the Tromsø HF pumping experiment on 16 February 1996 [PDF]

open access: yesAnnales Geophysicae, 2002
Comparisons between bistatic scatter measurements and simulation results during the Tromsø HF pumping experiment on 16 February 1996 are made. Doppler measurements of an HF diagnostic signal scattered from the field-aligned irregularities (FAIs) in
T. D. Borisova   +7 more
doaj   +1 more source

Motion Model of Floating Weather Sensing Node for Typhoon Detection

open access: yesComplex System Modeling and Simulation, 2022
To improve the accuracy of typhoon prediction, it is necessary to detect the internal structure of a typhoon. The motion model of a floating weather sensing node becomes the key to affect the channel frequency expansion performance and communication ...
Hui Lu, Xinyu Dong, Xianbin Cao
doaj   +1 more source

Doppler shift of the TAE mode frequency in DIII-D [PDF]

open access: yesPlasma Physics and Controlled Fusion, 1994
The Doppler shift caused by toroidal plasma rotation in DIII-D complicates a comparison of the frequency of toroidicity-induced Alfven eigenmodes (TAE) to theoretical predictions, but also separates toroidal modes in frequency space and provides information about the radial location of the modes.
Strait, EJ, Heidbrink, WW, Turnbull, AD
openaire   +4 more sources

Foraging behavior and Doppler shift compensation in echolocating hipposiderid bats, I-Iipposideros bicolor and I-Iipposideros speoris [PDF]

open access: yes, 1984
1. Two hipposiderid bats,H. bicolor andH. speoris, were observed in their natural foraging areas in Madurai (South India). Both species hunt close together near the foliage of trees and bushes but they differ in fine structure of preferred hunting space:
AD Grinnell   +19 more
core   +1 more source

Sharing a common origin between the rotational and linear doppler effects [PDF]

open access: yes, 2017
The well-known linear Doppler effect arises from the linear motion between source and observer, while the less well-known rotational Doppler effect arises from the rotational motion.
Allen   +40 more
core   +1 more source

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