A vascular system guidewire composed of a helically wound proximal spring segment attached to an additional helically wound distal spring segment of a more radiopaque material by winding the two segments together over a core. Further, a plasma processing apparatus includes a plasma processing mechanism for performing a plasma process on a substrate to be processed, and a controller for controlling the plasma processing mechanism to thereby perform the plasma processing method. The method further includes determining possible block sizes supported by each allocated time slot identified in the received grant. A level represented by the detected peak-corresponding sample is outside the prescribed level range. Various embodiments also provide content scoring andor other prioritization techniques for optimizing exploitation of the delaycast queue. As a result, the NAS-OS is read from the logical volume in the storage device and the NAS system section starts up.