The present invention relates generally to a method for dynamically displaying a control bar of a multimedia player, wherein one subjective thereof is to prevent overlap occurred to the menu image provided by a multimedia source. Plamsids of the invention are constructed with a DNA sequence flanking the T-DNA bordered gene of interest that reduces or eliminates the occurrence of transformants with vector read-through DNA sequence. The correlation-value computation section computes a correlation value representing a correlation between a known delay wave detection series and a received delay wave detection series. Operation is adaptable to include all DC power systems.