Many alternatives to silicon are being developed, as it is believed that silicon transistors will reach their technological limits after 2020. Two-dimensional (2-D) nanomaterials have shown promise for a new generation of nanoelectronic devices. The most widely studied 2-D nanomaterial is graphene, a single layer of carbon atoms and packed …

Current unmanned aircraft – including the MQ-1 Predator, MQ-9 Reaper and RQ-4 Global Hawk have excelled against terrorists, both for near-persistent intelligence, surveillance and reconnaissance and strike capability for Reapers and Predators. This was partly due to the permissive environments of southwest Asia counter terrorism missions against technologically inferior groups. In …

As the name indicates, ultrasonic sensors measure distance by using ultrasonic waves. The basic working principle of these sensors is based on echolocation, which involves transmission of ultrasonic waves to the target object, which reflects it back to the source after receiving the initial wave. The ultrasonic sensors detect the exact …