Results 21 to 30 of about 624,198 (294)

Analysis of Kapitza-Dirac diffraction patterns beyond the Raman-Nath regime [PDF]

open access: yes, 2009
We study Kapitza-Dirac diffraction of a Bose-Einstein condensate from a standing light wave for a square pulse with variable pulse length but constant pulse area.
Adams   +24 more
core   +1 more source

Pulse wave digital processing and beat detection based on wavelet transform and adaptive thresholding

open access: yesJournal of Biomedical Photonics & Engineering, 2015
This paper considers the adaptive algorithm for pulse wave processing in the presence of various physiological interferences, such as motion artefacts and baseline wander.
Aleksandr A. Fedotov   +2 more
doaj   +1 more source

Numerical Investigation on the Response Characteristics of Hypersonic Boundary Layer under Different Types of Finite Amplitude Pulse Disturbance Waves

open access: yesJournal of Applied Fluid Mechanics, 2021
The hypersonic transient flow pass a blunt cone under three types of pulse disturbances is calculated using DNS. The response characteristic of hypersonic boundary layer among different types of pulse disturbance is compared.
X. Tang, J. Yu, H. Zhang, H. Li, M. Shi
doaj  

Assessment of pulse rate variability by the method of pulse frequency demodulation

open access: yesBioMedical Engineering OnLine, 2005
Background Due to its easy applicability, pulse wave has been proposed as a surrogate of electrocardiogram (ECG) for the analysis of heart rate variability (HRV). However, its smoother waveform precludes accurate measurement of pulse-to-pulse interval by
Ohte Nobuyuki   +4 more
doaj   +1 more source

Pulse wave response characteristics for thickness and hardness of the cover layer in pulse sensors to measure radial artery pulse

open access: yesBioMedical Engineering OnLine, 2018
Background Piezo-resistive pressure sensors are widely used for measuring pulse waves of the radial artery. Pulse sensors are generally fabricated with a cover layer because pressure sensors without a cover layer are fragile when they come into direct ...
Min-Ho Jun   +3 more
doaj   +1 more source

Comparison of arterial stiffness indices measured by pulse wave velocity and pulse wave analysis

open access: yesBlood Pressure, 2019
Objective: Arterial stiffness indices measured by pulse wave velocity and pulse wave analysis have been widely studied in different populations. Only a few small studies have been reported regarding these two measurement methods.
Hongyan Zhu   +13 more
doaj   +1 more source

Photoexcitation of electron wave packets in quantum spin Hall edge states: effects of chiral anomaly from a localised electric pulse [PDF]

open access: yes, 2016
We show that, when a spatially localised electric pulse is applied at the edge of a quantum spin Hall system, electron wavepackets of the helical states can be photoexcited by purely intra-branch electrical transitions, without invoking the bulk states ...
Dolcini, Fabrizio   +3 more
core   +2 more sources

Traditional practices and recent advances in Nadi Pariksha: A comprehensive review

open access: yesJournal of Ayurveda and Integrative Medicine, 2019
The significance of Nadi Pariksha is well understood and effectively used by Ayurveda practioners for assessing Tridoshas and various physiological and psychological states of the patient.
P. Venkata Giri Kumar   +2 more
doaj   +1 more source

A Wearable and Real-Time Pulse Wave Monitoring System Based on a Flexible Compound Sensor

open access: yesBiosensors, 2022
Continuous monitoring of pulse waves plays a significant role in reflecting physical conditions and disease diagnosis. However, the current collection equipment cannot simultaneously achieve wearable and continuous monitoring under varying pressure and ...
Xiaoxiao Kang   +6 more
doaj   +1 more source

Parametric Frequency Conversion of Short Optical Pulses Controlled by a CW Background [PDF]

open access: yes, 2007
We predict that parametric sum-frequency generation of an ultra-short pulse may result from the mixing of an ultra-short optical pulse with a quasi-continuous wave control.
Baronio, Fabio   +3 more
core   +4 more sources

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