A method, apparatus and system relate to detecting an interfering device in a wireless network such as a wireless local area network. The housing further includes a notch defined by a first notch end surface of the upper wall and a second notch end surface of the first and second sidewalls. The combination associates two independent, but synergistic functions essential to the re-epithelialization process or healing process, i. A spring is mounted in the cabinet so as to oppose movement of the door toward the horizontal position. In response to a predetermined operation performed by the player, the game system causes the player character to perform a predetermined motion on a condition such that a value obtained as a result of the addition reaches a predetermined value.