54 citations · 142 across the 9 of their papers we have counts for
10 papers
On the spectral asymptotics of waves in periodic media with Dirichlet or Neumann exclusions
Othman Oudghiri-Idrissi, Bojan B. Guzina, Shixu Meng
We consider homogenization of the scalar wave equation in periodic media at finite wavenumbers and frequencies, with the focus on continua characterized by: (a) arbitrary Bravais l…
On the full-waveform inversion of seismic moment tensors
Alan A. S. Amad, Antonio A. Novotny, Bojan B. Guzina
In this work, we propose a full-waveform technique for the spatial reconstruction and characterization of (micro-) seismic events via joint source location and moment tensor invers…
Homogenization of the wave equation with non-uniformly oscillating coefficients
Danial P. Shahraki, Bojan B. Guzina
The focus of our work is dispersive, second-order effective model describing the low-frequency wave motion in heterogeneous (e.g.~functionally-graded) media endowed with periodic m…
A convergent low-wavenumber, high-frequency homogenization of the wave equation in periodic media with a source term
Shixu Meng, Othman Oudghiri-Idrissi, Bojan B. Guzina
We pursue a low-wavenumber, second-order homogenized solution of the time-harmonic wave equation at both low and high frequency in periodic media with a source term whose frequency…
A rational framework for dynamic homogenization at finite wavelengths and frequencies
Bojan Guzina, Shixu Meng, Othman Oudghiri-Idrissi
In this study, we establish an inclusive paradigm for the homogenization of scalar wave motion in periodic media (with or without the source term) at finite frequencies and wavelen…
On the elastic anatomy of heterogeneous fractures in rock
Fatemeh Pourahmadian, Bojan B. Guzina
This study examines the feasibility of the full-field ultrasonic characterization of fractures in rock. To this end, a slab-like specimen of granite is subjected to in-plane, O(10$…
On the dynamic homogenization of periodic media: Willis' approach versus two-scale paradigm
Shixu Meng, Bojan Guzina
When considering an effective i.e. homogenized description of waves in periodic media that transcends the usual quasi-static approximation, there are generally two schools of thoug…
A synoptic approach to the seismic sensing of heterogeneous fractures: from geometric reconstruction to interfacial characterization
Fatemeh Pourahmadian, Bojan B. Guzina, Houssem Haddar
A non-iterative waveform sensing approach is proposed toward (i) geometric reconstruction of penetrable fractures, and (ii) quantitative identification of their heterogeneous conta…
Generalized linear sampling method for elastic-wave sensing of heterogeneous fractures
Fatemeh Pourahmadian, Bojan B. Guzina, Houssem Haddar
A theoretical foundation is developed for active seismic reconstruction of fractures endowed with spatially-varying interfacial condition (e.g.~partially-closed fractures, hydrauli…
On the elastic-wave imaging and characterization of fractures with specific stiffness
Fatemeh Pourahmadian, Bojan B. Guzina
The concept of topological sensitivity (TS) is extended to enable simultaneous 3D reconstruction of fractures with unknown boundary condition and characterization of their interfac…