The present invention relates to a method and system for a multimodal biometric system utilizing a single image to generate hand shape and palmprint features. Other embodiments automatically predict the impact of natural conditions andor deliberate interventions on crop yields. The second split power is transmitted to a differential planetary gear system. Sensing occurs over time so the control scheme may be optimized based on consideration of historical data. When communication is being executed, the state of the first speaker when the first and second housings are not in the close state is a valid state, and the close state is detected by the detector, a control section invalidates both the microphone and the first speaker and validates the second speaker.