Abstract: The present disclosure relates to a gait rehabilitation device, and the gait rehabilitation device according to the present disclosure includes a load providing portion (200) including a body (210) and a rotating shaft (220) which rotates relative to the body (210) to generate a load, wherein the rotating shaft (220) is coupled to a side of a human body, a rotation member (300) rotatably coupled to the body (210) and coupled to an opposite side of the human body, and a rotation control portion (400) to allow or disallow the rotation member (300) to rotate relative to the load providing portion (200).

Abstract: The present disclosure relates to an airbag structure, and the airbag structure according to the present disclosure includes a body (100) into which a fluid is injected, wherein a plurality of predetermined points (A) spaced apart from each other is arranged on a side along a lengthwise direction, and a protrusion (200) into which the fluid is injected from the body (100), the protrusion (200) extending from the two adjacent predetermined points (A) in a direction facing away from the body (100), wherein the protrusion (200) has a smaller width of a farthest end from the body (100) than a width of an opposite end connected to the body (100).

Abstract: A nonlinearity parameter measuring method and system is configured to separately process a signal of a fundamental wave and second harmonic wave that went through a probe attached to a specimen using a circuit including an analogue band pass filter and intermediate frequency amplifier, and minimize the effects caused by noise, thereby measuring an exact nonlinearity parameter.