Three semantics have been proposed as the most promising candidates for a declarative interpretation for logic programs and pure Prolog programs: the least Herbrand model, the least term model, i.e. the C-semantics, and the S-semantics. Previous results show that a strictly increasing information ordering between these semantics exists for the class of all programs. In particular, the S-semanti...

Cobalt chromium (CoCr) alloys are utilized to make dental prosthesis. Casting CoCr is a common operation in dentistry laboratories due its low cost. surplus (metal remaining the sprue and crucible former) frequently reused by reduce recycle metal waste. However, quality safety of these recast require further information. Microbial attachment surface prostheses may affect safety. Biofilm formati...