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Showing 5 of 5 academic articles

Lyapunov analysis of data-driven models of high dimensional dynamics using reservoir computing: Lorenz-96 system and fluid flow

Miki U Kobayashi, Kengo Nakai, Yoshitaka Saiki • Journal of Physics: Complexity (2024)

We computed the Lyapunov spectrum and finite-time Lyapunov exponents of a data-driven model constructed using reservoir computing. This analysis was performed for two dynamics that exhibit a highly dimensionally unstable structure. We focus...

DOAJ Open Access (DOAJ) DOI: 10.1088/2632-072X/ad5264

A comparative study on chaoticity of equatorial/low latitude ionosphere over Indian subcontinent during geomagnetically quiet and disturbed periods

K. Unnikrishnan • Nonlinear Processes in Geophysics (2010)

In the present study, the latitudinal aspect of chaotic behaviour of ionosphere during quiet and storm periods are analyzed and compared by using GPS TEC time series measured at equatorial trough, crest and outside crest stations over India...

DOAJ Open Access (DOAJ) DOI: 10.5194/npg-17-765-2010

Remarks on the light ring images and the optical appearance of hairy black holes in Einstein–Maxwell-dilaton gravity

Chatchai Promsiri, Weerawit Horinouchi, Ekapong Hirunsirisawat • European Physical Journal C: Particles and Fields (2024)

Abstract The behaviors of null geodesics in the spherical symmetric black holes in Einstein–Maxwell-dilaton (EMD) theory with coupling function $$f(\Phi )=e^{-2\alpha \Phi }$$ f ( Φ ) = e - 2 α Φ are meticulously analyzed. We investigate th...

DOAJ Open Access (DOAJ) DOI: 10.1140/epjc/s10052-024-13258-8