Method for converting methane into oxygenated derivates, characterized in that it comprises irradiating a solid surface using UV light with a wavelength of less than 200 nm and in that it takes place on the surface of a solid, preferably a microporous solid, wherein the selectivities achieved are greater than 90% for conversions of about 10%. The devices enable substantially higher breakdown voltage on hetero-epitaxial substrates and extremely high breakdown voltage on homo-epitaxial substrates. If it is determined that the vehicle is sufficiently accelerated during traction control, a value obtained by subtracting a maximum permissible value from a value set last time as the target vehicle speed is compared with the target slip vehicle speed, and the larger one of them is set as the target vehicle speed this time. As the elongated shaft rotates, the plurality of disks engages a stack of paper present in the feed tray and advances multiple sheets of the stack of paper to shredding blades.