This seminar which is at its fourth edition the first STEMA 03 took place in 2003, wants to be a meeting place of the different researchers in the axes of mechanics. it is organized at a time when research must, more than ever, put its results to the benefit of our companies in our society, our economy; at a time when scientific research must move towards the concerns of the industrial sector by setting up bridges between the university and the enterprise, which is more than indispensable for the modernization of the economic sector.