A source electrode and a metal pattern for a storage capacitor are formed on an insulating substrate, a silicon layer having a doped source region and a doped drain region is formed on the substrate and the source and the drain regions directly contact to the source electrode and the metal pattern. Therein, the first rod has one end as a handle and the other end as a first fixing part. The clientserver architecture is configurable to enable network providers to specify a policy directed to a trade-off between reducing recognition latency perceived by a user and usage of network resources.