Trapped air metamaterial concept for ultrasonic sub-wavelength imaging in water
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DOI: 10.1038/s41598-020-67454-z
Abstract: Acoustic metamaterials constructed from conventional base materials can exhibit exotic phenomena not commonly found in nature, achieved by combining geometrical and resonance effects. However, the use of polymer-based metamaterials that could operate in water is… read more here.
Keywords: ultrasonic sub; concept; sub wavelength; water ... See more keywords
Attenuation of pipeline filling over-pressures through trapped air
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DOI: 10.1080/1573062x.2024.2346727
Abstract: ABSTRACT Entrapped air pockets in water pipelines play a significant role in influencing transient over-pressures during filling procedures. Several research is focused on highlighting the attenuation of pressure peaks in pipes with single air pockets.… read more here.
Keywords: trapped air; air; water; pipeline ... See more keywords
Large lungs may predict increased air trapping in navy divers
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DOI: 10.14814/phy2.15153
Abstract: Navy divers tend to have large lungs and low expiratory flow rates in the terminal portion of a spirogram. We examined Finnish Navy divers for the presence of air trapping, airway obstruction, and functional airway… read more here.
Keywords: air trapping; large lungs; navy divers; capacity ... See more keywords