A process for preparing low-dielectric-constant silica film is developed. Accordingly, one Bluetooth host may readily gain access to any one of a plurality of different devices and different types of devices. They are particularly useful as inhibitors of hepatitis C virus NS5B polymerase, as inhibitors of HCV replication, andor for the treatment of hepatitis C infection. Pressing on a cut row or column is basically determined by calculating the barycenters of \u2018virtual\u2019 hollows in the reception voltages corresponding to this cut row or column. After the application topology is deployed, the QoS parameters of the virtual environment components are monitored.