My research focuses on direct and inverse problems involving wave motion. Example topics include inverse scattering, waves in periodic and random media, geodynamics, and nonlinear waves in soft solids. We tackle the scientific and engineering challenges using analytical, computational, and experimental tools. Target applications of our work include nondestructive evaluation (NDE) of materials and structures, seismic imaging, medical diagnosis, and wave manipulation by architected materials.
High-frequency inverse scattering
This study [61] deciphers the Topological Sensitivity (TS) as a tool for 3D anomaly reconstruction in the high-frequency regime. The video shows the TS map in a mid-section of an ellipsoidal anomaly w/increasing source aperture.
Research openings
Waveform tomography of a hard defect
In [36], we pursue 3D seismic waveform tomography using surface observations. The video shows the evolution of a trial anomaly during nonlinear minimization, whose color indicates the inclusion's modulus (G>Gb).
Research openings
My research focuses on direct and inverse problems involving wave motion. Example topics include inverse scattering, waves in periodic and random media, geodynamics, and nonlinear waves in soft solids. We tackle the scientific and engineering challenges using analytical, computational, and experimental tools. Target applications of our work include nondestructive evaluation (NDE) of materials and structures, seismic imaging, medical diagnosis, and wave manipulation by architected materials.
Waveform tomography of a soft defect
In [36], we pursue 3D seismic waveform tomography using surface observations. The video shows the evolution of a trial anomaly during nonlinear minimization, whose color indicates the inclusion's modulus (G<Gb).
Research openings
My research focuses on direct and inverse problems involving wave motion. Example topics include inverse scattering, waves in periodic and random media, geodynamics, and nonlinear waves in soft solids. We tackle the scientific and engineering challenges using analytical, computational, and experimental tools. Target applications of our work include nondestructive evaluation (NDE) of materials and structures, seismic imaging, medical diagnosis, and wave manipulation by architected materials.
Ultrasonic waves in an aluminum plate
Waves & Imaging Lab @UMN: 3D Scanning Laser Doppler Vibrometer (SLDV) capture of the plane-stress wavefield in an aluminum plate containing a hole and a slit @100kHz.
Research openings
My research focuses on direct and inverse problems involving wave motion. Example topics include inverse scattering, waves in periodic and random media, geodynamics, and nonlinear waves in soft solids. We tackle the scientific and engineering challenges using analytical, computational, and experimental tools. Target applications of our work include nondestructive evaluation (NDE) of materials and structures, seismic imaging, medical diagnosis, and wave manipulation by architected materials.
Seismic waves across a stationary fracture
Waves & Imaging Lab @UMN: 20kHz ultrasonic waves propagating across a stationary through-fracture in a granite slab: out-of-plane (uz) displacement wavefield captured by SLDV.
Research openings
My research focuses on direct and inverse problems involving wave motion. Example topics include inverse scattering, waves in periodic and random media, geodynamics, and nonlinear waves in soft solids. We tackle the scientific and engineering challenges using analytical, computational, and experimental tools. Target applications of our work include nondestructive evaluation (NDE) of materials and structures, seismic imaging, medical diagnosis, and wave manipulation by architected materials.
Seismic waves across an advancing fracture
Waves & Imaging Lab @UMN: 20kHz ultrasonic waves propagating across an advancing fracture in a granite slab subjected to 3-point bending: in-plane (uy) displacement waveforms captured by SLDV.
Research openings
My research focuses on direct and inverse problems involving wave motion. Example topics include inverse scattering, waves in periodic and random media, geodynamics, and nonlinear waves in soft solids. We tackle the scientific and engineering challenges using analytical, computational, and experimental tools. Target applications of our work include nondestructive evaluation (NDE) of materials and structures, seismic imaging, medical diagnosis, and wave manipulation by architected materials.
Contact
Bojan Guzina
Shimizu Professor
Department of Civil, Environmental, & Geo- Engineering
University of Minnesota
500 Pillsbury Drive SE, Minneapolis, MN 55455
Phone 612-626-0789, Fax 612-626-7750
Email