1. Time : 11월 24일 (목) 5:00 ? 6:00 pm

2. Place : Room # 8-327 

3. Speaker : 이현대 교수 (인하대학교)

4. 제목 : Resonances in bubbly media

5. 초록: We derive an original formula for the Minnaert resonances of bubbles of arbitrary shapes using layer potential techniques and Gohberg-Sigal theory. Our formula can be generalized to multiple bubbles. We provide a mathematical justification of the monopole approximation and demonstrate the enhancement of the scattering in the far field at the Minneart resonances. Our results show that at the Minnaert resonance it is possible to achieve superfocusing of acoustic waves or imaging of passive sources with a resolution beyond the Rayleigh diffraction limit.