The integration and application of a new multi-objective tabu search optimization algorithm for Fluid Structure Interaction (FSI) problems are presented. The aim is to enhance the computational design process for real world applications and to achieve higher performance of the whole system for the four considered objectives. The described system combines the optimizer with a well established FSI solver which is based on the fully implicit, monolithic formuFlation of the problem in the Arbitrary Lagrangian-Eulerian FEM approach. The proposed solver resolves the proposed uid-structure interaction benchmark which describes the self-induced elastic deformation of a beam attached to a cylinder in laminar channel ow. The optimized ow characteristics of the aforementioned geometrical arrangement illustrate the performance of the system in two dimensions. Special emphasis is given to the analysis of the simulation package, which is of high accuracy and is the core of application. The design process identifies the best combination of ow features for optimal system behavior and the most important objectives. In addition, the presented methodology has the potential to run in parallel, which will significantly speed-up the elapsed time. Finite Element Method (FEM), Fluid-Structure Interaction (FSI), Multi-Ojective Tabu search (MOTS2). Copyright © 2013 Tech Science Press.

The revolutions in the Arab World such as Egypt, Tunisia, Marocco, Libya, Syria and Yemen have affected political landscapes in the Middle East countries. Revolutions in the MENA countries have broken up relations between the Arab World and the US. The revolutions also have paved the way for Islamic groups to put political pressures to take power . Moreover, the Arab Spring have the influence over changes in the United States foreign policy in Middle East. But, up to now, it is not clear that the revolution in the Middle East in 2011 is a great opportunity for the U.S. to increase its role in countries. It's not clear too, whether or not it also a new opportunity for the U.S. to establish strategic alliances in Arabic World. While Washington was surprised by the fall of the regimes of Egypt and Tunisia, for instance, there is uncertainty that the two countries would be the new alliances of the US in the near future. America has lost its loyalists such as former Egyptian President Hosni Mubarak and Ben Ali, Tunis. But at the same time, the proximity of the the US-Gulf alliances is increasing, especially with Saudi Arabia,Bahrain, Kuwait and Qatar . Washington for a while is still groping, if not frenzy, in rebuilding the present relationship with the Middle East, as long as the MENA countries are still in the era of transition. The U.S and the West are aware about that problem, and they understand that in the Middle East the political uncertainty is so apparently.