That a trigger for creating a temporary collaborative ad-hoc network of hardware nodes has occurred is detected. A method of fabricating such a multilayer wiring board is also disclosed. The second set of data is relatively insensitive to the effect and is relatively sensitive to the presence of the resistive body. In this way, 80% or higher efficiency can be ensured for the oscillation energy of piezoelectric elements, which increases as the rise or fall of the driving voltage becomes sharper. The head has a pin formed on the under surface thereof which is able to enter and move in the rear eccentric guiding groove.