A hydrogen storage material and process of forming the material is provided in which complex hydrides are combined under conditions of elevated temperatures andor elevated temperature and pressure with a titanium metal such as titanium butoxide. A default mass fuel flow rate is derived from the default fuel volume and relevant engine parameters. In a second magnetic head of the present invention, a magnetoresistive device is formed on a substrate, and a yoke is provided above a non-magnetic layer constituting the device. When it is determined that the quality of the primary transmission channel degrades, a third channel replaces the first channel as the primary transmission channel, and a replacement request is sent from the first communication terminal via a second channel.