To generate dynamic relationship-based content personalized for members of a social networking system, at least one action of one or more members of the social networking system is associated with relationship data for the one or more members to produce consolidated data. A first exhaust gas inflow-outflow opening and a second exhaust gas inflow-outflow opening of the exhaust gas passage pipe and an exhaust gas inflow opening to the silencer body are arranged at one end of the silencer body. In addition, the first node can transfer the certain packet to the second node to process the certain packet by using the algorithm. Two-dimensional electron gas generated at the interface between the undoped AlGaN layer and the undoped GaN layer and the first and second p-AlGaN layers form a pn junction in a gate region. The method for making a low density-ceramic comprises the steps of:. According to the present invention, at least one counterbalance weight is provided in the proximity of the eccentric for the purpose of noise reduction and enhanced truth of running of the assembly.