ethods: Dynamical Systems", Physics Dept., Bogazigi Uni- versity, Istanbul, 2 November 2010. • Visiting Scientist, Physics Departments, Bogazigi and Kog Universities, Istanbul, Turkey, 1-5 November 2010. • Visiting Scientist, Physics Department, Mons University, Belgium, 25 October 2010. • Seminar, "Potentials