Valery Sizikov received his D.Sc. degree in Mathematical Modelling, Numerical Methods, Signal Processing and Programming in Central Research Institute ”Marine Physical Instrument”, Leningrad, Russia, in 1989. At present, he is an Ordinary Professor of Saint Petersburg ITMO University, Russia. His research interests are integral equations; systems of linear/nonlinear equations; ill-posed problems; regularization and filtering methods; image, spectra and signal processing; X-ray and infrared tomography; programming.