A laser located within a casing of an optoelectronic module is operated by heating the laser to an operating temperature at or above the maximum specified operating temperature of the module casing using a heater device within the module, the laser having operating characteristics at its operating temperature that are sufficient for its required function. The light emitting diode device includes a cavity formed between a reflective optical element and a transmissive optical element. As a result, a gas that flows into a cylinder after the switching is discharged into an exhaust passage without burning. The shafts are or can be operatively connected to the three planetary gear sets such that at least seven forward gears can be shifted to by the two subtransmissions. A server system 1 designates league members from a plurality of members who register to a normal pennant using a client computer 2, sequentially creates normal leagues consisting of the designated league members, and decides the game schedule of each created normal league.