Stones, iron rods and bombs: India's trains face a fresh wave of threats — and the red flags are everywhere

A passenger is injured after a stone crashes through a train window. An alert loco pilot spots an iron pipe on the tracks ...
IEEE

K-Band LiNbO₃ A3 Lamb-Wave Resonators With Through-Holes

Abstract: Addressing critical challenges in Lamb wave resonators, this paper presents the first validation of resonators incorporating through-holes. Using the A3 mode resonator based on a LiNbO3 ...