The thermal boundary resistance (TBR) is still a challengeable subject since its mechanism to explain quantitatively is not clear in spite of its importance. We performed non-equilibrium molecular dynamic (NEMD) simulation to evaluate TBR at an epitaxial solid interface composed of two different materials. Solid argon is selected as a simulation material since it is a non-conductor electrically...

We demonstrated a nearly impedance-matched high-overtone bulk acoustic resonator (HBAR) operating at super high frequency ranges using an epitaxial AlN piezoelectric layer directly grown on conductive SiC cavity substrate with no metal insertion. The small impedance mismatch was verified from the variation in free spectral range (FSR); experimentally obtained FSR spectra were greatly reproduced...

A quantitative theory of the middle-ear acoustics i developed and expressed interms of an electric analog. The analog network is based on the functional anatomy of the middle ear. The numerical values of its elements are derived from impedance measurements on normal and pathological ears and from anatomical data. It is shown that the input impedance of the analog agrees within the experimental ...

This paper reports the initial results of a test series to evaluate a method for determining the normal incidence impedance of a locally reacting acoustically absorbing liner, located on the lower wall of a duct in a grazing incidence, multi-modal, nonprogressive acoustic wave environment without ow. This initial evaluation is accomplished by testing the methods' ability to converge to the know...

The present experimental investigation was carried out in order to explore the possible thermodynamic and interactions studies of D(+) fructose with mixed solvent of aqueous alkali metal halides at different molalities and constant temperature. Experimental values of densities and ultrasonic velocities were carried out of the ternary mixture solution D(+)fructose with aqueous NaCl ,KCl , MgCl2 ...