Submission to Data Set V Researchers: Georgios Lappas Technological Educational Institution (TEI) of Western Macedonia Kastoria Campus PO Box 30 GR-52100 Kastoria GREECE email: lappas@kastoria.teikoz.gr Andreas Albrecht University of Hertfordshire School of Computer Science Hatfield, Herts AL10 9AB UK email: A.Albrecht@herts.ac.uk Abstract We combine the perceptron algorithm with simulated annealing based search strategy, which employs the logarithmic cooling schedule c(k)=Gama/ln(k+2). The stochastic search of logarithmic simulated annealing is performed to a random subset of training samples associated with a perceptron. The task is minimizing the classification error outputed by each perceptron in a depth-4 Classification Circuit, which outputs in a 'one against all' method the class label for each testing sample.