The present invention relates to a centralized system for water and energy recycling specifically designed for high-rise buildings and urban environments. This system integrates multiple innovative technologies to efficiently manage and recycle water and energy resources, addressing the critical challenges of water...

A wearable, directional ultrasonic repellent integrated into a ranger’s gum-boot deters tiger approach non-lethally. Dual ground-level ultrasonic rangers at the toe and heel are actuated sequentially with 5–20 ms dead-time to suppress cross-talk; returns are filtered and fused to a distance estimate. Emission is per...