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Determination of aortic pulse transit time based on waveform decomposition of radial pressure wave [PDF]

open access: yesScientific Reports, 2021
Carotid-femoral pulse transit time (cfPTT) is a widely accepted measure of central arterial stiffness. The cfPTT is commonly calculated from two synchronized pressure waves.
Wenyan Liu   +7 more
doaj   +2 more sources

Folded network and structural transition in molten tin

open access: yesNature Communications, 2022
Unraveling the structural origin of liquid anomalies remains a challenging topic. Xu et al. propose a folded-network structural model for molten tin and provide insights into the observed second-order-like structural transition.
Liang Xu   +9 more
doaj   +1 more source

Emission of Rn and CO2 From Soil at Fault Zones Caused by Seismic Waves

open access: yesEarth and Space Science, 2023
In the search for precursors to earthquakes, correlation has been found between geochemical characteristics of soil gases and seismic activity. In this paper we present evidence that seismic waves can trigger emission of soil radon (Rn) and carbon ...
Lei Liu   +8 more
doaj   +1 more source

A Comprehensive Review of High-Pressure Laser-Induced Materials Processing, Part II: Laser-Driven Dynamic Compression within Diamond Anvil Cells

open access: yesJournal of Manufacturing and Materials Processing, 2022
The field of high-pressure materials research has grown steadily over the last seven decades, with many remarkable discoveries having been made. This work is part II of a three-part series summarising recent progress in laser material processing within ...
Mohamad E. Alabdulkarim   +3 more
doaj   +1 more source

Dynamic Characteristics of Unsteady Aerodynamic Pressure on an Enclosed Housing for Sound Emission Alleviation Caused by a Passing High-Speed Train

open access: yesApplied Sciences, 2022
Train speed is increasing due to the development of high-speed railway technology. However, high-speed trains generate more noise and discomfort for residents, enclosed housing for sound emission alleviation is needed to further reduce noise.
Haiquan Jing   +5 more
doaj   +1 more source

An experimental investigation of pressure variation during train passage in tunnel

open access: yesNihon Kikai Gakkai ronbunshu, 2014
When a train travels through a tunnel at high speed, large pressure variations are generated in the tunnel. They impose loads on tunnel lining, equipment inside the tunnel, and the train.
Sanetoshi SAITO, Takashi FUKUDA
doaj   +1 more source

Numerical simulation of cavitation-bubble expansion and collapse inside a bottle subjected to impact on its topside

open access: yesEngineering Applications of Computational Fluid Mechanics, 2021
In this study, we simulate the acceleration-induced cavity bubble expansion and its non-spherical collapse in a drastically varying pressure field caused by mechanical impact, and we qualitatively compare the results with those for similar ζ number ...
Yue-han Chen, Jie-min Zhan, Yu-tian Li
doaj   +1 more source

Spatio-Temporal Plasma Afterglow Induces Additional Neutral Drag Force on Microparticles

open access: yesFrontiers in Physics, 2022
An emerging topic in complex plasma physics is the interaction between dust particles and afterglow plasmas. Control of plasma-particle interactions and specifically of the particle trajectories is especially relevant for plasma based contamination ...
J. C. A. van Huijstee   +3 more
doaj   +1 more source

Water hammer mitigation by internal rubber hose [PDF]

open access: yesArchives of Civil Engineering
The aim of this research was to experimentally analyse the possibility of using a rubber hose placed inside a pipeline to mitigate the water hammer phenomenon.
Michał Kubrak
doaj   +1 more source

Development and prospect of downhole monitoring and data transmission technology for separated zone water injection

open access: yesPetroleum Exploration and Development, 2023
This article outlines the development of downhole monitoring and data transmission technology for separated zone water injection in China. According to the development stages, the principles, operation processes, adaptability and application status of ...
He LIU   +6 more
doaj   +1 more source

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