a tire provided with regularly arranged concave portions dented toward a tire inner side direction from a tire surface in at least some areas on the tire surface wherein in a direction along with the tire surface, a maximum width L of the concave portion is in a range of 0. The electronic device includes a codec, at least two audio output devices, an identification module, a communication module and at least two players. The temperature of the support structure may be controlled andor gases or liquids may be confined in the observation region for reactions andor imaging. Stored in each inode is a first identifier associated with the first set of files and a second identifier associated with the time of the first snapshot. The block locations of the blocks are stored in memory according to the coarse grained sorting. In this manner, controlled adjustment for low frequency content is performed in the signal normalization block.