Systems and methods for intelligently reducing the number of log-likelihood ratios stored in memory of a wireless communication device are described herein. A centrifugal fan is associated with the air intake opening so as to draw air from the air intake opening. An additional electron donor layer has a band gap higher than the band gap of the lower layer disposed on sidewall portions of the mesa structure and on the region of the 2DEG region terminating at sidewalls of the mesa. The other one of the auxiliary capacitors is formed between a black matrix and said N-type or P-type conductive region or said metal wiring line connected to the conductive region, and uses a silicon nitride layer used as a passivation film as a dielectric. The rider’s legs extend toward the front of the board and are secured by a pair of foot holders that attach to the board.