A contact lens is provided that is capable of being worn by a user. The system further includes slave devices having respective bus interfaces coupled to the bus. Therefore, since particles collide with the convex part of the catalytic layer, it becomes possible to collect them easily and the collecting rate for particles and the ability of the particles purification are improved. The domain model may be automatically codified into an API based solution as the appmainframe interface, and stored on a development and operational platform for use. For example, the compatibility service may receive notifications of incompatibilities from other users, web sites, and the like. The morphology of the semiconductor structure remains stable when the trace amount of the first substance is oxidized during crystallization of the dielectric.