Scattering can be measured by using an optical system having a Hartman-Shack wave-surface sensor. Each word line is electrically coupled to a set of memory cells, a gate contact and a pair of dielectric pillars positioned parallel to the word line. The information center includes at least a main information unit having an electronic map and route calculating and navigating software, and a communication device capable of transmittingreceiving phonic and digital information. The logically identical circuits can include wordline address predecoder circuits, where a high speed predecoder circuit is enabled during a normal operating mode and a slower low power predecoder circuit is enabled for self-refresh operations.