Action calculi have been deened as a broad class of action structures with added structure; they are syntactic in nature. Each action calculus AC(K) is determined essentially by a set K of controls. Diierent concrete models of concurrent computation such as Petri nets, the typed-calculus and the-calculus, are obtained by diierent choices of control set K. The aim of this work is to deene a clas...

Natural hazards such as earthquakes have threatened the life of human beings during the history.As a consequence, the vibration mitigation of structures has caught great importance. Activecontrol of structures is one of the rapidly emerging areas in the concept of structural control. Thispaper presents a control method to deal with this subject when the dynamics of the structure ishysteretic an...

In this paper the control algorithm for controlled civil structures subjected to earthquake excitation is thoroughly investigated. The objective of this work is the control of structures by means of the pole placement algorithm, in order to improve their response against earthquake actions. Successful application of the algorithm requires judicious placement of the closed-loop eigenvalues from ...