Results 101 to 110 of about 105,814 (313)

Demonstration of the Doppler effect in acoustics [PDF]

, 1964
F.Kh. Baibulatov
openalex   +1 more source

A Generative AI‐Assisted Piezo‐MEMS Ultrasound Device for Plant Dehydration Monitoring

Advanced Science, EarlyView.
This study introduces a complementary metal–oxide–semiconductor (CMOS)‐compatible wearable piezoelectric micromachined ultrasound transducers (PMUTs) that sandwiches the leaf (PMUT–Leaf–PMUT, PLP) and employs generative artificial intelligence for real‐time analysis.
Kaustav Roy, Darren Sim, Luwei Wang, Zixuan Zhang, Xinge Guo, Yao Zhu, Sanjay Swarup, Chengkuo Lee   +7 more
wiley   +1 more source

Flow velocity quantification by exploiting the principles of the Doppler effect and magnetic particle imaging. [PDF]

Sci Rep, 2021
Pantke D, Mueller F, Reinartz S, Kiessling F, Schulz V.   +4 more
europepmc   +1 more source

In Vivo Dynamic Coronary Arteries Blood Flow Imaging Based on Multi‐Cycle Phase Clustering Ultrafast Ultrasound

Advanced Science, EarlyView.
This study addresses a critical gap in ultrafast ultrasound cardiovascular flow imaging and introduces a transformative approach, Clustering Singular Value Decomposition (cSVD), which enables dynamic cardiovascular flow imaging throughout full cardiac cycle without motion correction and hyper‐fast imaging strategies.
Hao Yu, Jiabin Zhang, Feng Feng, Jinyu Yang, Yu Xia, Yunlong Zhao, Jue Zhang   +6 more
wiley   +1 more source

Acoustic Metasurface for Space‐time Reflection Manipulation

Advanced Science, EarlyView.
This article introduces a novel space‐time acoustic metasurface (STAM) to overcome the limitations of bulky structures in sound modulation. Using a programmable piezoelectric array, the STAM precisely controls waterborne acoustic waves through spatiotemporal phase modulation.
Yunhan Yang, Han Jia, Jiuyang Lu, Yuzhen Yang, Tuo Liu, Jun Yang, Zhengyou Liu   +6 more
wiley   +1 more source

Receiver Bandwidth Effect on Reflectivity and Doppler Velocity Estimates [PDF]

, 1979
Richard J. Doviak, Dušan S. Zrnić
openalex   +1 more source

Stirring Without Stirrers: Polymer Fouling‐Driven Mass Transport Unlocks Order‐of‐Magnitude Gain in Electrochemiluminescence

Advanced Science, EarlyView.
Strategic electrode fouling enhances mass transport, primarily through electrochemically actuated lateral density gradients. Engineered fouling induces flow velocities up to 0.4 cm s⁻¹ in otherwise quiescent systems. Sub‐millimeter plastic features boost local rates by up to 290%, while micrometer‐scale arrays yield a 30% net electrolysis gain ...
Wathsala Prasadini Kapuralage, Hemendra Kala, Mariusz Martyniuk, Nadim Darwish, Melanie MacGregor, K. Swaminathan Iyer, Simone Ciampi   +6 more
wiley   +1 more source

Negative-energy waves and the anomalous Doppler effect [PDF]

, 1976
M.V. Nezlin
openalex   +1 more source

Quantum Valley Hall Effect‐Based Coupler with Continuously Tunable Transmission for Topological Information Communication

Advanced Science, EarlyView.
The quantum‐valley‐Hall‐based bridge boundary has the frequency dependent wave localization. Utilizing the frequency dependency, this article experimentally shows the micro‐electromechanical‐systems‐based topological coupler with continuously tunable transmission coefficients by the frequency of interface modes within a single bulk bandgap. Furthermore,
Keita Funayama, Kenichi Yatsugi, Hiroya Tanaka, Hideo Iizuka   +3 more
wiley   +1 more source

A Test of the Effect of Satellite Spin on Two-Way Doppler Range-Rate Measurements [PDF]

, 1972
John W. Marini
openalex   +1 more source