Absfruct-Simulated annealing is a computational heuristic for obtaining approximate solutions to combinatorial optimization problems. It is used to construct good source codes, error-correcting codes, and spherical codes. For certain sets of parameters codes that are better than any other known in the literature are found.
Carcinoma of the oesophagus is endemic in certain well demarcated areas throughout the world, and a method of screening population groups at high risk for oesophageal cancer is urgently needed. In this study the sensitivity and specificity of the carbohydrate antigen CA19-9 as a marker of carcinoma of the oesophagus in African patients was examined. The… (More)