Results 241 to 250 of about 2,694 (304)

Anomalous frozen evanescent phonons. [PDF]

open access: yesNat Commun
Chen Y   +6 more
europepmc   +1 more source

Cteno‐Bot: An Untethered Metachronally Swimming Robot With Magnetoactive Propulsors

open access: yesAdvanced Intelligent Systems, EarlyView.
We present Cteno‐bot, an untethered ctenophore‐inspired robot which swims using metachronally coordinated appendages. A single mechanism controls up to 216 magnetoactive propulsors via a dynamically varying magnetic field. We show that the swimming speed of the robot can be increased without a corresponding increase in power requirement, simply by ...
David J. Peterman, Margaret L. Byron
wiley   +1 more source

Acoustic and Ultrasonic Sensing Technology in Non-Destructive Testing. [PDF]

open access: yesSensors (Basel)
Castiñeira-Ibáñez S   +2 more
europepmc   +1 more source

Droplet microfluidics for biomedical applications: emerging trends and future developments. [PDF]

open access: yesMicrosyst Nanoeng
Ma L   +7 more
europepmc   +1 more source

A Geometrical Acoustics Approach for Calculating the Effects of Flow on Acoustics Scattering

Journal of Sound and Vibration, 1994
Summary: A ray acoustics approach to flow effects on acoustics scattering is considered, based on a combination of geometrical acoustics and the paraxial ray approximation. The approach allows for scattering by objects of arbitrary shapes, inhomogeneous and moving media.
N Atalla
exaly   +2 more sources

Reverberation time and audibility in phased geometrical acoustics using plane or spherical wave reflection coefficients

open access: yesJournal of the Acoustical Society of America, 2019
Room acoustics parameters are typically predicted using some form of geometrical acoustics for large rooms. For smaller rooms, phased geometrical acoustics improves results for lower frequencies.
Monika Rychtarikova   +2 more
exaly   +2 more sources

Modeling (Non-)uniform scattering distributions in geometrical acoustics

open access: yesProceedings of Meetings on Acoustics, 2013
In most cases, a surface is not ideally smooth. It rather contains regular and irregular dents, bumps and other textures that influence the reflection of the incident wave.
Dirk Schröder
exaly   +2 more sources

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