L
Loukas F. Kallivokas
Researcher at University of Texas at Austin
Publications - 82
Citations - 1578
Loukas F. Kallivokas is an academic researcher from University of Texas at Austin. The author has contributed to research in topics: Finite element method & Boundary value problem. The author has an hindex of 20, co-authored 78 publications receiving 1350 citations. Previous affiliations of Loukas F. Kallivokas include National Technical University of Athens & Carnegie Mellon University.
Papers
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Journal ArticleDOI
Large-scale simulation of elastic wave propagation in heterogeneous media on parallel computers
Hesheng Bao,Jacobo Bielak,Omar Ghattas,Loukas F. Kallivokas,David R. O'Hallaron,Jonathan Richard Shewchuk,Jifeng Xu +6 more
TL;DR: A system that helps automate the task of writing efficient portable unstrucmred mesh solvers for distributed memory parallel supercomputers and indicates that, despite the highly irregular structure of the problem, excellent performance and scalability are achieved.
Journal ArticleDOI
Site characterization using full waveform inversion
TL;DR: In this paper, the authors describe the formulation and numerical resolution of the underlying time-dependent inverse medium problem, and compare the inverted site profile with profiles obtained using the Spectral Analysis-of-Surface-Waves (SASW) method, in an attempt to compare their methodology against a widely used concurrent inversion approach.
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Mixed perfectly-matched-layers for direct transient analysis in 2D elastic heterogeneous media
TL;DR: In this paper, a new mixed displacement-stress formulation for forward elastic wave simulations in perfectly matched-layer (PML)-truncated heterogeneous media is proposed. But the authors focus on the non-physical components of the displacement and stress fields.
Proceedings ArticleDOI
Earthquake ground motion modeling on parallel computers
Hesheng Bao,Jacobo Bielak,Omar Ghattas,Loukas F. Kallivokas,David R. O'Hallaron,Jonathan Richard Shewchuk,Jifeng Xu +6 more
TL;DR: The design and discuss the performance of a parallel elastic wave propagation simulator that is being used to model and study earthquake-induced ground motion in large sedimentary basins, and automates the solution of unstructured mesh PDE problems on parallel computers.
Journal ArticleDOI
Time-domain hybrid formulations for wave simulations in three-dimensional PML-truncated heterogeneous media
TL;DR: In this paper, an unsplit-field but mixed-field, displacement-stress formulation was proposed to simulate the wave motion in arbitrarily heterogeneous, elastic, perfectly-matched-layer (PML)-truncated media.