Results 71 to 80 of about 37,425 (308)
Sensors, 2020 In an underwater acoustic cellular (UAC) system, underwater equipment or sensor nodes need to detect the identity of an underwater base station (UBS) and synchronise it with a serving UBS. It is known that, in an underwater acoustic channel, the temporal
Muhammad Asim +3 more
doaj +1 more source
Enhanced EISCAT UHF backscatter during high-energy auroral electron precipitation [PDF]
Annales Geophysicae, 2013 Natural enhancements in the backscattered power of incoherent scatter radars up to 5 orders of magnitudes above the thermal backscatter are sometimes observed at high latitudes.
N. M. Schlatter +4 more
doaj +1 more source
Advanced Science, EarlyView.ABSTRACT Doxorubicin‐induced cardiomyopathy (DIC) remains a dose‐limiting clinical challenge. This study reveals that cardiac vascular endothelial cells (CVECs) act as initial sensors of doxorubicin cardiotoxicity: circulating doxorubicin activates the cGAS‑STING pathway in CVECs, triggering NLRP3 inflammasome‑mediated pyroptosis and release of ...
Wang Jun +10 more
wiley +1 more source
A novel method of Doppler shift estimation for OFDM systems
, 2008 Doppler shift estimation has been deployed to improve the performance of Orthogonal Frequency Division Multiplexing (OFDM) systems. A novel method of Doppler shift estimation for OFDM systems in time varying and frequency selective fading channels has ...
Zhou, W, Lam, WH
core +1 more source
Programmable Elastic Wave Control Via Mechanical‐Acoustic Interaction in Bistable Metamaterials
Advanced Science, EarlyView.A mechanically programmable metamaterial based on mechanical‐acoustic interaction enables reconfigurable elastic wave control through bistable state switching. Spatial encoding of peak and valley states tunes band structures and transmission, achieving low‐frequency vibration suppression, waveguiding, and energy localization.
Yuanyuan Li +7 more
wiley +1 more source
The Space-Based Altimeter Echo-Signal when Doppler Scattering is taken Into Account
Известия высших учебных заведений России: Радиоэлектроника, 2017 In the analytical approximation of time dependent average power of a satellite altimeter echo-signal (power profile) the Doppler scattering of individual specular point responses is usually neglected.
D. S. Borovitsky +3 more
doaj
The development of an ultrasonic Doppler bed-load velocimeter
, 1989 Includes bibliography.A instrument has been developed for measuring the velocity of solid particles adjacent to the pipe wall in a solids-liquid pipeline.
Lazarus, Mark Doron
core
Advanced Science, EarlyView.This study uncovers that quercetin naturally targets mitochondria. By coordinating quercetin with Fe3+, we engineer an ultrasmall cascade nanozyme (MCN) with superoxide dismutase‐catalase activities. MCN crosses the damaged blood–brain barrier, scavenges mitochondrial ROS, prevents mitochondrial DNA leakage, and blocks the cGAS‐STING pathway, thereby ...
Wenxuan Zheng +14 more
wiley +1 more source
Interferometric methods of the doppler shift determination
Odessa Astronomical Publications, 2017 About interferometric methods of the doppler shift ...
V. E. Panchuk +2 more
doaj +1 more source
Doppler shift experiments with source in periodic motion: Parametrized Doppler shift formulas
, 2003 Doppler shift formulas are derived for two less studied scenarios: stationary receiver and source in harmonic oscillatory motion and stationary receiver and source in uniform circular motion. For each of the scenarios we derive a formula, one which works when the emission period is small enough that it can be considered that two successive signals are ...
Rothenstein, Bernhard +1 more
openaire +2 more sources