A slotted waveguide antenna stiffened structure for an aircraft having an aircraft skin. 05 mass-% and 10 mass-% hydrocarbon chains having less than 16 carbon atoms, and between 0. The technique can also include determining an equation that includes a first coefficient for the first parameter and a second coefficient for the second parameter, normalizing the first coefficient based on the values of the first parameter, and normalizing the second coefficient based on the values of the second parameter. The forward ends of tubes are tapered to initiate deformation. A count associated with the unique firewall rule is incremented using a count of logs stored associated with the respective unique object and a report is generated. The method comprises the steps of: a PDCP entity transmitting to an opposite PDCP entity a PDCP Protocol Data Unit used to request the transmission of a PDCP status report; and the PDCP entity receiving the PDCP status report which is transmitted from the opposite PDCP entity according to the PDCP PDU.