A power converter for converting energy from a green power unit as e. The invention further relates to a method which can be carried out by the apparatus in accordance with the invention. First channel material is between the gate and the source region. Otherwise, limited functions are enabled. The response of the seismic sensor recordings is beam steered to at least one of a selected point and a selected volume in the subsurface. An example high chair includes a frame and a seat, wherein the seat defines a slot and is shaped to funnel spills toward the slot.