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In this study, an active control strategy is used for design of passive energy dissipation systems using viscous fluid dampers and structural stiffness modification. The combination of supplemental damping and modification (usually reduction) of stiffness is used to minimize the two main structural response parameters, namely the maximum inter-story drifts and maximum absolute accelerations. In this manner, both structural and nonstructural damages can be controlled.
While active control systems are expected to improve the structural esponse beyond what can be achieved in passive control, the practical implementation of control systems are mostly of passive type.... 

In this article, asymmetric information is tested via a positive correlation test in the group supplemental health insurance (GSHI). Furthermore, using dynamic features of insurance contracts, moral hazard is separated from learning. For these two tests, Asia Insurance Company longitudinal data, for two types of paraclinical and hospital health services, during the period 2011-2016, is used. We find that the effect of asymmetric information is not significant in hospital services, as there is not any moral hazard in this group, we can conclude that there is also no between-group adverse selection in GSHI. On the other hand, in the group of paraclinical services, there is asymmetric... 

A methodology is developed for designing optimum passive energy dissipation systems using active control algorithms. A combination of stiffness reduction and increase of damping is utilized to reduce both acceleration and displacement response. In this method, first an active control system is designed using pole assignment and sliding mode control algorithm. Here, the methods to use the actives algorithms aremodified such that the resulting properties can be achieved by a passive control system using viscous fluid dampers. Next, a passive control system is designed to result in the structural properties close to those extracted from the actively controlled system. It is shown that this... 

This research has been performed with the aim of gaining familiarity with various types of seismic isolation systems, their unique features and numerous advantages, factors affecting their performance and finally their modelling and design. Despite the advantages of seismic isolation systems as control instruments, but where there is not enough information on the involved parameters in the performance of these systems, there is possibility of unpredictable behavior of the structures. Hence, considering the extent and influence of each parameter involved in the performance of the isolators, a parametric study is performed utilizing the 3D models under multi-directional excitations, using the...