An ignition spark enhancing device disposed in the electrical path between a spark source and a spark plug of an internal combustion engine. A model of the O&S problem is created based on a service use profile that describes a logical structure of delivery, maintenance, deployment, testing policy, infrastructure and logistics constraints. A tray is pivotally connected to the door body for receiving associated print media thereon. A higher density impurity region may be formed with a gate electrode and side wall insulating film as a mask. The invention also discloses a fire-resistant plate containing the organicinorganic component. The scraping arrangement includes blades that are driven along a joint or crack by the cart to remove excess filling material deposited in the joint or crack of a working surface.