Abstract: A fully electric aircraft includes an aircraft body, a frame, a plurality of fixed-pitch rotors, and two ducted fans. The aircraft body is provided with a manned flight cabin. The frame is provided on top of the aircraft body. The plurality of fixed-pitch rotors are spaced apart on the frame around a vertical line where a center of gravity of the aircraft is located. When the aircraft body is in flight, a rotation axis of each fixed-pitch rotor remains fixed relative to the aircraft body. The two ducted fans are connected to the frame and are respectively located on left and right sides of the aircraft body. When a yaw moment provided by the fixed-pitch rotors is imbalanced, the ducted fans provide a compensatory yaw moment to the aircraft body.

Abstract: This invention relates to in vitro methods for the induction of corticogenesis in human pluripotent cells, such as iPS cells, by culturing the cells under conditions which stimulate retinoid signalling and inhibit TGF? superfamily signalling. This may be useful in production of cortical neurons, in particular patient-specific cortical neurons; the modelling of juvenile and adult-onset neurological diseases; and the development of therapeutics.