Beyond the limits of human hearing, ultrasonic waves—frequencies above 20 kHz—are rapidly emerging as a powerful enabler of covert communication, secure authentication, and futuristic warfare capabilities. As vulnerabilities in traditional radio-frequency (RF) systems become increasingly apparent, ultrasonic technologies present a compelling alternative. These sound-based communications bypass electromagnetic shielding, offer precise …

From Planar to Vertical: The Evolution of NAND Flash Technology NAND flash memory is a type of non-volatile storage technology that retains data even when power is removed, making it essential to everything from smartphones and solid-state drives (SSDs) to data centers and edge devices. Unlike traditional spinning hard drives, …