Irena Lasiecka- Distinguished University Professor and Chair of the Department of Mathematical Sciences University of Memphis since 2013. Previously Commonwealth Professor of Mathematics at the University of Virginia. Fellow of the AMS (American Mathematical Society ) since 2015 and IEEE Fellow since 2005. Winner of 2011 SIAM W.T. Idalia Reed Reid Prize for contribution to the area of control theory and dierential equations.

ISI's Highly cited researcher with over 11,000 citations on Google Scholar and over 5000 citations on MathSCNet and Web of Science. Has authored and co-authored 10 books-monographs and over 350 research papers published in prime .Her research in the area of control theory and optimization of distributed parameter systems (PDE's) has been continuously supported by the National Science Foundation (NSF) and also by AFOSR Oce of Sponsored Research, ARMY Research Oce and NASA. Frequently invited plenary speaker at the main conferences organized by SIAM, AMS (American Mathematical Society), IFIP (International Federation of Information Processing), IEEE, AIMS (American Institute of Mathematical Sciences). Delivered cycles of Lectures for Postdocs and Young Researachers organized by CBMS-NSF-SIAM, Oberwolfach Institute, ISSA (Trieste Italy), CNR (Italy) etc. Mentored and advised over 25 PhD students and 15 Postdoctoral students who now occupy prime positions in Academia and Research Labs internationally.

**Professional activities** include Charimanship of TC7 Committee on Modeling and Optimization in IFIP (2001-2008), US Representative to IFIP, Member of the Nominating Commiitee for : the Kyoto Prize ( Innamori Foundation), The Japan Prize in Science and Technology , SIAM Rreid Prize. Member of Scientic Panels at NSF (National Science Foundation), AFOSR, CBMS, SIAM, IFIP, IMACS. Editor in Chief (with R. Temam and H. Pham ) of Applied Mathematics and Optimization , AMO , and (with A. Haraux) ECT-Evolution Equations and Control Theory. On Editorial boards of over 20 research journals in the area of control theory, analysis and applied mathematics.

# How to eliminate flutter in flow structure interactions.

An appearance of utter in oscillating structures is an endemic phenomenon. Most common causes are vibrations induced by the moving flow of a gas which is interacting with the structure. Typical examples include: turbulent jets, vibrating bridges, oscillating facial palate in the onset of apnea. In the case of an aircraft it may compromise its safety. The intensity of the flutter depends heavily on the speed of the flow (subsonic, transonic or supersonic regimes). Thus, reduction or attenuation of flutter is one of the key problems in aeroelasticity with application to a variety of elds including aerospace engineering, structural engineering, medicine and life sciences. Mathematical models describing this phenomenon involve coupled systems of artial dierential equations (Euler Equation and nonlinear plate equation) with interaction at the interface - which is the boundary surface of the structure. The aim of this talk is to present a theory describing: (1) qualitative properties of the resulting dynamical systems (existence, uniqueness and robustness of nite energy solutions), (2) asymptotic stability and associated long time behavior that includes the study of global attractors, (3) feedback control strategies aiming at the elimination or attenuation of the flutter. As a consequence one concludes that the flow alone (without any dissipation added to the elastic structure) provides some stabilizing effect on the plate by reducing asymptotically its dynamics to a nite dimensional structure. However, the resulting "dynamical system" may be exhibiting a chaotic behavior. In the subsonic case, one also shows that the flutter can be eliminated by adding structural damping to the plate.