A shunt activation signal is transmitted by an external control terminal through an external transmission interface to switch a flash memory controller in a shunt mode. Each mandatorily convertible security combines a forward purchase contract, a mandatory portable remarketable security, and a call option to form a single investment unit. A radius of the non-axisymmetric end wall is determined by a transformation function including a plurality of geometric parameters defined by a user based on flow conditions. The differential is to balance the first driving force and the second driving force to reduce skew in the sheet and feed the sheet along a feed path of a printer. The outer connection terminal of the resonator is connected to the first surface, and the terminal of the heat generator is connected to the second surface.