A collapsible chair for supporting a person includes a seat and a chest rest. The gas gate includes a cylinder within a housing situated between the regions of differing gaseous pressure, wherein the gas gate provides for choke mode transonic flow of air leaks between the regions. Individual amino acids or mixtures of amino acids that are prepared from the hydrolysis of the proteins can be used. If, within the range of the short-range wireless communication means, at least one device, equipped with means for receiving said at least one transmitted notice message, detects the transmitted notice message, at least a receiving step to receive the transmitted notice message and a sorting step are further taken in said device. Such actuators are required for flow control in aeronautics and moving machinery such as wind turbines, noise abatement in landing gear and rotary wing aircraft and other applications. The invention enables determination of whether the tachyarrhythmia episode has terminated based on cardiac beat pattern.