An indication of the formability of metallic sheet is determined using a correlation between nondestructively measurable ultrasonic properties and a formability index. A calibration relation is initially established by measuring ultrasonic velocities at various angles to the rolling direction of sheet specimens with noncontacting electromagnetic acoustic transducers, calculating an ultrasonic c...

Ultrasonic speech is a novel research area with significant applications: as a speech-aid prosthesis for patients with voice box difficulties, silent speech interfaces, secure mode of communication in mobile phones and as a communication medium in high noise industrial environments. Feature extraction is a critical part of the ultrasonic speech system. Linear prediction analysis (LPA) has been ...

Certain microstructural features of materials, such as grain size in metals, porosity in ceramics, and structural phase compositions, are important for determining mechanical properties. Many of these microstructural features have been characterized by ultrasonic wave propagation measurements, such as wave velocity and attenuation. Real-time monitoring of ultrasonic wave propagation during the ...

In this work, machining test was carried out in various machining conditions using ultrasonic vibration capable CNC machine. For work material, alumina ceramic (Al2O3) was used while for tool material diamond electroplated grinding wheel was used. To evaluate ultrasonic vibration effect, grinding test was performed with and without ultrasonic vibration in same machining condition. In ultrasonic...

Particles accumulated in a coupled acoustic-gravity field, in which the base-material of a particle determines the equilibrium aggregation positions, are eluted from a separation channel by an orthogonal laminar flow. Elution times are controllable by changing the intensity and frequency of the ultrasonic waves.

introduction: despite a growing popularity of noninvasive ultrasonic lipolysis procedure, there is a lack of evidence about the efficacy of this method. this study was performed to evaluate the efficacy of focused ultrasonic lipolysis on abdominal cellulite treatment. methods: twenty-eight consecutive subjects (age: 37.8 ± 8 years) underwent weekly transdermal focused ultrasonic lipolysis (med ...

•In operando X-ray diffraction of polarization rotation •Observation polar nanodomains by scanning transmission electron microscopy •Suppression at high frequency The dynamics evolution and in 0.68PbMg1/3Nb2/3O3-0.32PbTiO3 relaxor ferroelectric thin films are studied via synchrotron-based with AC electric fields. A frequency-limited suppression was observed above ultrasonic frequencies ( ? 20 k...

Aim and objective: This study was conducted to evaluate and compare the effectiveness of various root planing instruments, namely the curette, standard smooth ultrasonic tip and diamond coated ultrasonic tip under conditions of nonsurgical root debridement. Materials and methods: A total of 20 incisors from 14 patients, with a pocket depth of 5 to 10 mm, indicated for extraction were selected f...

Abstract To study the effect of addition potassium perchlorate (KClO 4 ) on performance nano thermites, Al/Bi 2 O 3 thermites with different mass fraction (wt%) KClO was made by ultrasonic dispersion method. Then, all samples were tested SEM, DSC and rapid excitation ignition. results showed /10 wt%KClO had highest heat release. Compared , release increased 28.32%. The activation energy calcula...