The invention relates to the soybean variety designated 4640250. CPS data in an OFDM-based, wireless communication system is modulated as QPSK data in the training tones of the data burst. A controller is placed in operative connection with the acoustic transducers and configured to activate the acoustic transducers in a phase relationship with each other. Accordingly, the liquid can be charged into the groove having the narrow width, by merely landing the liquid droplets on the recess having a large areal size. For example, certain methods as described herein can form a strontium titanate layer that has low carbon content, which can result in layer with a high dielectric constant.