A method for making a heterojunction bipolar transistor on an insulated semiconductor substrate. The geofence management system determines, at the option of the user, the location of a user mobile computing device relative to specific points of interest and alerts the user when the user nears the points of interest. The probe operator can be placed in a final query plan in the same place as the join operator in the preliminary query plan, while the build operator can be placed beneath the probe operator in the final query plan, between an exchange operator and the exchange operator’s child from the preliminary query plan. In certain example embodiments, asymmetric IR reflecting layer thicknesses may be used, andor different contact layers for the topbottom IR reflecting layers may be used to help achieve a combination of low SF values, high selectivity, and good coloration at normal andor off-axis viewing angles. The windings are arranged in a plurality of radially superposed layers, with each layer having a group of the windings arranged axially in a side by side manner, such that the superposed layers have a hexagonal cross section.