This study presents a precise method for monitoring shear crack development in concrete using acoustic emission analysis ...

These tones were also recorded on the chest using another electret microphone housed into an acoustic coupler. The attenuation of each tone was calculated by the power ratio between the one measured ...

Abstract: We present a planar lightwave circuit curved 2/spl times/2 coupler. Its splitting ratio has a low sensitivity to wavelength, polarization, and fabrication yet is low-loss and compact. We ...

Department of Chemical Engineering, Kumoh National Institute of Technology (KIT), 61 Daehak-ro, Gumi 39177, Gyeongbuk, Republic of Korea Department of Energy Engineering Convergence, Kumoh National ...