Abstract: The present application provides a system for unmanned aerial vehicle (UAV) parachute landing. An exemplary system includes a detector configured to detect at least one of a flight speed, a wind speed, a wind direction, a position, a height, and a voltage of a UAV. The system also includes a memory storing instructions and a processor configured to execute the instructions to cause the system to: determine whether to open a parachute of the UAV in accordance with a criterion, responsive to the determination to open the parachute of the UAV, stop a motor of the UAV that spins a propeller of the UAV, and open the parachute of the UAV after stopping the motor of the UAV for a first period.

Abstract: A flip-flop includes a sole and a strap unit. The strap unit includes a thong portion, and first and second strap portions, and is made by the steps of: providing superposed first and second layers of warp threads; inserting a first weft thread through sheds formed in the first layer of warp threads so as to weave the first strap portion; inserting a second weft thread through sheds formed in the second layer of warp threads so as to weave the second strap portion; and inserting the first and second weft threads through sheds which are cooperatively formed by the superposed first and second layers of warp threads so as to weave the thong portion.

Abstract: A flip-flop includes a sole and a strap unit. The strap unit includes a thong portion, and first and second strap portions, and is made by the steps of: providing superposed first and second layers of warp threads; inserting a first weft thread through sheds formed in the first layer of warp threads so as to weave the first strap portion; inserting a second weft thread through sheds formed in the second layer of warp threads so as to weave the second strap portion; and inserting the first and second weft threads through sheds which are cooperatively formed by the superposed first and second layers of warp threads so as to weave the thong portion.