A system and method for securing tokens to be cleaned includes a tray with a curved surface defining a channel extending along a first direction and spacers projecting from the curved surface into the channel. The virtual meeting application provides the functionality for a virtual meeting and provides user interface components related to transient state changes in the virtual meeting. Then, a frame of the bit stream is decoded into a discrete cosine transform domain representation. When the shifted playback position shifted backward, a video controller stores the shifted playback position as a start position of a loop playback section and the playback position before being shifted as an end position of the same, and gives an instruction for controlling loop playback of the loop playback section defined by the start position and the end position. Each shape efficiency factor value is determined using the expression \u03a3=Kf\xb7Km, where Kf=25 is an overall stability factor, Km=K1525 is a local stability factor, b, \u03b4b are the width and the thickness, respectively, of the main strip, i and F are the radius of gyration and the area of the cross-section, respectively, and K is the local stability stress coefficient. With the apparatus, it is possible to detect the beam properties such as the beam intensity, angle, parallelism, and a distribution of the particles in a particle beam.