A process for producing structures includes: cutting a transverse groove in a panel; introducing a plastic material into the groove; applying an imprint to the panel; cutting V-shaped grooves in the panel and folding the panel to form a structure. The vacuum source comprises a control system adapted to detect the consumed airflow, and to control the operation of each of the first and second vacuum pump based on the detected airflow. At the time that execution of the method is completed, the stored first type message is read out and a method of the object corresponding to the destination of the message is executed. The set of operating parameters include the transmission power, spectrum access probability, spectrum occupation time, and a Receiver Success Rate. Once the address is changed, the management node may connect to and configure the network element using standard protocols.