Results 191 to 200 of about 11,711 (254)
Advanced Science, EarlyView.Oxygen vacancy migration is a key degradation mechanism for the majority of MLCCs. There are limitations with spatially identifying regions of a capacitor that have degraded due to oxygen vacancy migration. This work showcases ultrasonic attenuation as a non‐electrical and nondestructive technique of identifying oxygen vacancy degraded regions of an ...
Haley N. Jones +3 more
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Advanced Science, EarlyView.A PROTAC‐functionalized protein/DNA‐integrated nanoantigen platform is developed to enhance dendritic cell vaccine potency. By combining a VHL‐recruiting peptide‐modified antigen with a sustained expression plasmid within CaCO3 nanoparticles, this system amplifies cross‐presentation, promotes DC maturation, and elicits robust Th1 and CTL responses ...
Peng Liu +4 more
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Ultrasonic Aspiration Transducer
Radiology, 1972Fluid-containing structures can be localized and aspirated by using a specially-designed ultrasonic transducer with a central hole. A needle is directed through the hole and into the tissue. The path of the needle tip can be followed ultrasonically as it enters the fluid. The same transducer is used to monitor the procedure continuously while the fluid
B B, Goldberg, H M, Pollack
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Optimization of ultrasonic transducers
Ultrasonics, 1985The so-called KLM-model for ultrasonic transducers is employed to optimize transducer design. Some new performance characteristics are defined which change monotonically with design parameters. These characteristics are based on the area of the envelope of the echo waveform produced by the transducer and of the corresponding amplitude spectrum.
J M, Thijssen +2 more
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Micromachined Ultrasonic Transducers
2008In this chapter the basic principles, the fabrication process, and some modelling approaches of the novel micromachined ultrasonic transducers (MUTs) are described. These transducers utilize the flex-tensional vibration of an array of micro membranes. They are usually called cMUT (capacitive Micromachined Ultrasonic Transducer) or pMUT (piezoelectric ...
Pappalardo M +3 more
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Ultrasonic wave transducer system and ultrasonic wave transducer
The Journal of the Acoustical Society of America, 2003There is disclosed an ultrasonic transducer system for harmonic imaging, comprising: an ultrasonic transducer comprising a transmitting ultrasonic vibrator for transmitting a fundamental ultrasound having a center frequency f0, and a receiving ultrasonic vibrator for receiving a harmonic signal having a center frequency nf0 (n is an integer of 2 or ...
Hideo Adachi, Katsuhiro Wakabayashi
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Ultrasonic transducer, method for manufacturing ultrasonic transducer, and ultrasonic flowmeter
The Journal of the Acoustical Society of America, 2007It is an object of the present invention to provide an ultrasonic transducer, which is so configured as to reduce the variations in characteristics, thereby to enable the stabilization of the precision, as well as to enable the improvement of the durability, and the like, a method for manufacturing the ultrasonic transducer, and an ultrasonic flowmeter.
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The Journal of the Acoustical Society of America, 2008
An ultrasonic transducer including: a fixed electrode; a vibrating film placed opposite to a surface of the fixed electrode and having a conducting layer; a member that holds the fixed electrode and vibrating film; the fixed electrode including a driving-use fixed electrode formed to drive the ultrasonic transducer, and a detecting-use fixed electrode ...
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An ultrasonic transducer including: a fixed electrode; a vibrating film placed opposite to a surface of the fixed electrode and having a conducting layer; a member that holds the fixed electrode and vibrating film; the fixed electrode including a driving-use fixed electrode formed to drive the ultrasonic transducer, and a detecting-use fixed electrode ...
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The Journal of the Acoustical Society of America, 1983
CSASZAR GABOR +3 more
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CSASZAR GABOR +3 more
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