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Advanced Science, EarlyView.We report a fully wireless, circuit‐free neural stimulator built on a millimetric magneto‐mechano‐electric (MME) cantilever transducer (3 × 10 × 5 mm) with a barium titanate (BTO) piezoelectric ceramic core. Under low‐frequency alternating magnetic fields, the MME cantilever mechanically oscillates, inducing stress on the BTO element and thereby ...
Yijing Wang +7 more
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Tailored D‐π Conjugation Boosts Piezocatalytic CO2 Reduction in a Platinum(II)‐Acetylide Framework
Advanced Science, EarlyView.The highly conjugated metalII‐acetylide framework demonstrates efficient ultrasound‐driven conversion of CO2 to CO. The piezoelectric field generated by ultrasound facilitates electron transfer from the tetraphenylene π‐column to the MII‐bis(acetylide) moiety, enabling CO2 activation. Compared to PdII‐ and NiII‐based analogues, the stronger d–π orbital
Mude Zhu +6 more
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Influence of High-Frequency Ultrasonic Vibration Load on Pore-Fracture Structure in Hard Rock: A Study Based on 3D Reconstruction Technology. [PDF]
Materials (Basel)Zhang J, Zhang L, Wang X, Niu Z, Yang Z.
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Ultrasonic vibration method and ultrasonic vibration apparatus
The Journal of the Acoustical Society of America, 2005An ultrasonic vibration method and an ultrasonic vibration apparatus, which do not have a directional property in the direction of vibrations, are disclosed. A pair of ultrasonic horns ( 11 ), ( 12 ), each having an ultrasonic vibrator ( 13 ), ( 14 ) provided at an end portion thereof, are disposed in an intersecting relationship to each other, and the
Morio Tominaga, Shinji Iwahashi
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The complex-mode vibration of ultrasonic vibration systems
Ultrasonics, 2002The longitudinal-flexural and torsional-flexural vibrations are studied for the ultrasonic solid horn and the ultrasonic vibration system comprised of a sandwich transducer and a solid horn. The discussed solid horn is of arbitrary non-uniform cross-section. The analysis on flexural-mode vibration is based on Timoshenko theory.
Guangping, Zhou +2 more
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Ultrasonic-vibration-assisted pelleting of switchgrass: Effects of ultrasonic vibration
Transactions of Tianjin University, 2011Biofuels produced from cellulosic biomass can be used to replace petroleum-based transportation fuels. However, the manufacturing cost of cellulosic biofuels is still high, partly due to the low density of cellulosic feedstocks. Pelleting of cellulosic feedstocks can increase their density, making their transportation and storage as well as biofuel ...
Weilong Cong +5 more
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Ultrasonic sensing of vibrations
Ultrasonics, 1998A noncontact system for vibration measurement using airborne ultrasound is studied as an alternative to optical techniques. An ultrasonic beam is emitted towards the moving surface and is received after reflection from the object under test. Two different physical effects contribute to the phase modulation of the received signal.
O.Bou Matar +4 more
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Burner with ultrasonic vibrator
The Journal of the Acoustical Society of America, 1980A burner with an ultrasonic vibrator wherein a plurality of electrostrictive vibrator elements are clamped between a front metal plenum having an atomizing surface formed at the leading end thereof and a rear metal plenum; an intermediate supporting member is joined to said front or rear metal plenum in proximity to one of said vibrator elements most ...
Katsuhiko Yamamoto +2 more
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A.M.A. Archives of Dermatology and Syphilology, 1953
THE VIBRATIONS or wave lengths beyond those audible to the human ear (which hears vibrations of 20 to 20,000 cps) are known as ultrasonic or supersonic vibrations. These vibrations have interesting possibilities in the field of investigative dermatology.
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THE VIBRATIONS or wave lengths beyond those audible to the human ear (which hears vibrations of 20 to 20,000 cps) are known as ultrasonic or supersonic vibrations. These vibrations have interesting possibilities in the field of investigative dermatology.
openaire +2 more sources