The invention relates to an aqueous silica-based sol comprising a nitrogen-containing organic compound and silica-based particles with a specific surface area of at least 300 square meters per gram of silica. A battery which supplies the electric motor of the power steering apparatus with the power source is arranged so as not to directly receive cooling air that passes through a radiator. , may be integrated in a single container to form an optimal heat exchanging network, minimize heat loss and optimize heat exchange efficiency. Information is obtained from the wireless communication system relating to the location of the subscriber, and a communication is made to a member of the subscriber’s contact list providing information relating to the subscriber and the situation. The sheet has a first side and an opposed second side with the first and second sides extending generally between the first end and the second end of the sheet.