The battery pack includes bus lines connecting a plurality of source trains in parallel. The network monitoring and failure detection system makes a determination of the agent health during the time window. The holding member relatively rotates in a winding direction due to an urging force of a torsional coil spring when elongation occurs in the web body, thereby preventing slack from occurring in the web body. Green tea foam in the top layer of a mattress acts as an antiodorant such that less of the chemical smell of the memory foam is perceived by the user. In particular, the inventors have constructed fusion proteins containing photoswitchable photochromic fluorescent protein domains linked to selected proteins and shown that such fusion proteins can be used to control the activity or localization of selected proteins with light. Particularly, field-effect alignment process is realized for aligning the carbon nanotubes on exact location of the memory cell, when forming the memory cell.