Abstract: A robotic prosthetic foot according to the present disclosure includes a coupling module having an upper portion to which a limb part of a user is coupled, a prosthetic foot module configured to be coupled to a lower portion of the coupling module and support a load of the user to enable the user to walk, and a joint module provided at the coupling module to enable the prosthetic foot module to rotate, wherein the joint module includes an elastic unit configured to compress and expand due to the prosthetic foot module rotating as the user walks and generate an elastic restoring force to facilitate the rotation of the prosthetic foot module.

Abstract: Provided is a wastewater treatment system comprising a cavitation reactor including an inlet into which wastewater is introduced, a main body in which a cavitation reaction occurs to treat the water, and an outlet from which the treated water is discharged. The main body comprises a nozzle for ejecting the introduced water and a target with which the jetted water collide.