7 papers
A Statistical Physics View of the S&P 500: Pairwise Interactions and Time-Varying Dynamics
Sebin Oh, Marta C. Gonzáleza, Ziqi Wang
We analyze a fixed panel of S\&P 500 stocks from 1996 to 2026 using complementary static and kinetic Ising models applied to daily binary open-to-close movements. The static pairwi…
Phase Transitions in Collective Damage of Civil Structures under Natural Hazards
Sebin Oh, Jinyan Zhao, Raul Rincon +2
The fate of cities under natural hazards depends not only on hazard intensity but also on the coupling of structural damage, a collective process that remains poorly understood. He…
Social Amplification Dominates Collective Hazard Response
Xiaolei Chu, Guanren Zhou, Marco Broccardo +3
Large-scale hazards affect societies not only through direct physical impacts but also through emotions that spread across populations. Fueled by social amplification and networked…
Recorded Versus Synthetic Spectral-compatible Ground Motions: A Comparative Analysis of Structural Seismic Responses
Jungho Kim, Maijia Su, Ziqi Wang +1
This paper presents a comparative analysis of structural seismic responses under two types of ground motion inputs: (i) synthetic motions generated by stochastic spectral-compatibl…
A composition of simplified physics-based model with neural operator for trajectory-level seismic response predictions of structural systems
Jungho Kim, Sang-ri Yi, Ziqi Wang
Accurate prediction of nonlinear structural responses is essential for earthquake risk assessment and management. While high-fidelity nonlinear time history analysis provides the m…
Dimensionality reduction can be used as a surrogate model for high-dimensional forward uncertainty quantification
Jungho Kim, Sang-ri Yi, Ziqi Wang
We introduce a method to construct a stochastic surrogate model from the results of dimensionality reduction in forward uncertainty quantification. The hypothesis is that the high-…