An electronic mail having thereon an URL of a conference host peer machine for automatically taking part in a conference by clicking once is sent to a plurality of conferee peer machines. The irregularly-shaped side panel is first divided into two segments with a single straight line to define an inflation segment and an impact segment. The basic shim data set is selected from a databank of body region-specific input shim data sets. If there is an existing network definition, the method includes updating the existing network definition with any extra columns of local definition, and applying an updated network definition to other nodes in the network holding a record of the network definition. The switching device can be remotely actuated to move between an open position and a closed position.