An intermetal insulating film containing at least silicon atoms, oxygen atoms and carbon atoms with the number ratio of oxygen atom to silicon atom being 1. An exterior cylindrical surface and an interior cylindrical surface extend between the first face and the second face. The virtual client is configured to send to the network controller via the network a first validation data unit that causes the network controller to send a second validation data unit to the access point if the first validation data unit is received by the network controller. The interrupted routine returns control to thread X with an indication that the routine’s completion condition is unsatisfied. The strain element is further configured to produce a strain for actuating the pole tip in response to a magnetic field. A fastening configuration at least partially enclosing other portions of the arresting unit provides a stable unified composite, without destroying desired compressive failure characteristics of the unit.