A process and apparatus for the electrolytic separation of fluorine from a mixture of gases is disclosed. A semiconductor device including an n-channel FET and a p-channel FET which are provided over a single crystal semiconductor substrate with an insulating layer provided therebetween and are isolated by an element isolation insulating layer. Embodiments of the present invention automatically determine model complexity of the local learning algorithm according to the distribution of ambiguous samples. In still another embodiment, the plug portion of the carrier includes an optical fiber to transmit light from a light source into the plug portion. The open end of the check carrier can be sealed closed using a repositionable adhesive.