Results 91 to 100 of about 121,274 (339)
Teaching the Doppler Effect in Astrophysics
, 2017 The Doppler effect is a shift in the frequency of waves emitted from an object moving relative to the observer. By observing and analysing the Doppler shift in electromagnetic waves from astronomical objects, astronomers gain greater insight into the ...
Cowley, Michael J., Hughes, Stephen W.
core +2 more sources
Sleep Alters the Velocity of Physiological Brain Pulsations in Humans
Advanced Science, EarlyView.Sleep alters I/CSF oscillatory flow, driven by increased respiratory (29%) and vasomotor pulsation (21%) velocities, while cardiovascular pulsations decreased by (22%). Velocity is quantified using optical flow analysis of MREG data. Spectral power increases alongside these pulsations (spatial correlation, r = 0.35 and r = 0.39, respectively ...
Ahmed Elabasy +13 more
wiley +1 more source
Securing the Inter-Spacecraft Links: Physical Layer Key Generation from\n Doppler Frequency Shift [PDF]
, 2021 Ozan Topal +2 more
openalex +2 more sources
Motional frequency shifts of trapped ions in the Lamb-Dicke regime
, 2007 First order Doppler effects are usually ignored in laser driven trapped ions when the recoil frequency is much smaller than the trapping frequency (Lamb-Dicke regime).
A. A. Madej +4 more
core +1 more source
Advanced Science, EarlyView.A bioinstructive injectable hydrogel enables sustained release of stromal cell–derived factor‐1 alpha (SDF‐1α) and stable retention of laminin through ionic and hydrophobic interactions. This dual‐signaling matrix promotes endogenous stem cell recruitment and training, supports angiogenesis, and enhances intrinsic regenerative processes in ischemic ...
Yurim Kim, Young‐Min Kim
wiley +1 more source
Curved Bistable Origami‐Inspired Flexible Transcatheter Mitral Valve Clamping
Advanced Science, EarlyView.A lightweight bistable curved origami dilator combines reversible deformation and high stability, offering a promising solution for minimally invasive mitral valve repair. Abstract Curved origami exhibits remarkable potential for minimally invasive medical applications owing to its unique geometric programmability and mechanical tunability. Building on
Siyu Gao +4 more
wiley +1 more source
Frame Capture in IEEE 802.11p Vehicular Networks [PDF]
, 2010 IEEE 802.11p is the new standard proposed by the IEEE for wireless connectivity in a vehicular context. It can be used by Advanced Driver Assistance Systems (ADAS) and Intelligent Transport Systems (ITS) to make vehicles aware of the traffic around them ...
Eenennaam, Martijn van +1 more
core +1 more source
Advanced Science, EarlyView.Microglial AXL drives white matter repair after stroke by orchestrating the cleanup of myelin debris. Mechanistically, AXL signals through EGR1 to boost Smpd1 transcription, regulating sphingolipid metabolism and preventing lipid droplet toxicity. Restoring the pathway with ASM therapy mitigates damage, positioning AXL as a key node for therapeutic ...
Junqiu Jia +13 more
wiley +1 more source
Advanced Science, EarlyView.Machine learning models predict in real time the onset of harmful microbubble collapse during microbubble‐enhanced focused ultrasound (MB‐FUS) and enable dynamic adjustment of sonication to prevent cavitation‐induced damage. This predictive control expands the safe operating window for bloodbrain barrier opening, enhancing nanoparticle delivery and ...
Hohyun Lee +17 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
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