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• W4285299654 abstract "Boundary feedback stabilization of a critical, nonlinear Jordan--Moore--Gibson--Thompson (JMGT) equation is considered. JMGT arises in modeling of acoustic waves involved in medical/engineering treatments like lithotripsy, thermotherapy, sonochemistry, or any other procedures using High Intensity Focused Ultrasound (HIFU). It is a well-established and recently widely studied model for nonlinear acoustics (NLA): a third--order (in time) semilinear Partial Differential Equation (PDE) with the distinctive feature of predicting the propagation of ultrasound waves at textit{finite} speed due to heat phenomenon know as textit{second sound} which leads to the hyperbolic character of heat propagation. In practice, the JMGT dynamics is largely used for modeling the evolution of the acoustic velocity and, most importantly, the acoustic pressure as sound waves propagate through certain media. %Due to its sensitivity to different media, such model (or similar) is often used for medical/engineering treatments such as lithotripsy, thermotherapy, sonochemistry, or any other procedures using High Intensity Focused Ultrasound (HIFU). In this work, emph{critical} refers to (usual) case where media--damping effects are non--existent or non--measurable and therefore cannot be relied upon for stabilization purposes. In this paper the issue of boundary stabilizability of originally unstable (JMGT) equation is resolved. Motivated by modeling aspects in HIFU technology, boundary feedback is supported only on a portion of the boundary, while the remaining part of the boundary is left free (available to control actions) . Since the boundary conditions imposed on the free part of the boundary fail to satisfy Lopatinski condition (unlike Dirichlet boundary conditions), the analysis of uniform stabilization from the boundary becomes very subtle and requires careful geometric considerations." @default.
• W4285299654 created "2022-07-14" @default.
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• W4285299654 date "2022-01-01" @default.
• W4285299654 modified "2023-10-14" @default.
• W4285299654 title "Boundary feedback stabilization of a critical nonlinear JMGT equation with Neumann-undissipated part of the boundary" @default.
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• W4285299654 doi "https://doi.org/10.3934/dcdss.2022107" @default.
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