Abstract: An artificial knee joint is to be connected between a prosthetic thigh and a prosthetic lower leg. The artificial knee joint includes a knee joint body, a processor mounted in the knee joint body, a damping unit that is coupled to the processor and configurable to provide various damping levels, and an accelerometer coupled to the processor. The accelerometer is configured to measure acceleration subjected to the artificial knee joint, and to generate and transmit a measuring signal according to the measurement to the processor. The processor is configured to control the damping unit to provide one of the damping levels, based on the measuring signal.

Abstract: A container cap for a beverage or food container includes a main body having a threaded portion for engagement with a neck of a container, and a rotary disk mounted on the main body by engagement between a protrusion extending from the center of an upper surface of the main body and a slotted retaining member provided at a center of the underside of the rotary disk. The upper surface of the main body is provided with a plurality of marks and at least one window is provided in the rotary disk so that, as the rotary disk is rotated, selected ones of said plurality of marks can be made to appear in said at least one window.