Zobrazeno 1 - 10
of 136
pro vyhledávání: '"Rapti Z"'
Autor:
Chen, Q. Y., Rapti, Z., Drossinos, Y., Cuevas-Maraver, J., Kevrekidis, G. A., Kevrekidis, P. G.
Practical parameter identifiability in ODE-based epidemiological models is a known issue, yet one that merits further study. It is essentially ubiquitous due to noise and errors in real data. In this study, to avoid uncertainty stemming from data of
Externí odkaz:
http://arxiv.org/abs/2406.17827
Autor:
Rapti, Z., Cuevas-Maraver, J., Kontou, E., Liu, S., Drossinos, Y., Kevrekidis, P. G., Kevrekidis, G. A., Barmann, M., Chen, Q. -Y.
Metapopulation models have been a popular tool for the study of epidemic spread over a network of highly populated nodes (cities, provinces, countries) and have been extensively used in the context of the ongoing COVID-19 pandemic. In the present wor
Externí odkaz:
http://arxiv.org/abs/2207.01958
Autor:
Kevrekidis, G. A., Rapti, Z., Drossinos, Y., Kevrekidis, P. G., Barmann, M. A., Chen, Q. Y., Cuevas-Maraver, J.
It is widely accepted that the number of reported cases during the first stages of the COVID-19 pandemic severely underestimates the number of actual cases. We leverage delay embedding theorems of Whitney and Takens and use Gaussian Process regressio
Externí odkaz:
http://arxiv.org/abs/2202.00507
Publikováno v:
Phys. Rev. E 104, 024412 (2021)
We examine the spatial modeling of the outbreak of COVID-19 in two regions: the autonomous community of Andalusia in Spain and the mainland of Greece. We start with a 0D compartmental epidemiological model consisting of Susceptible, Exposed, Asymptom
Externí odkaz:
http://arxiv.org/abs/2005.04527
We study soliton dynamics in a system of two linearly coupled discrete nonlinear Schr\"odinger equations, which describe the dynamics of a two-component Bose gas, coupled by an electromagnetic field, and confined in a strong optical lattice. When the
Externí odkaz:
http://arxiv.org/abs/0904.2415
Autor:
Nistazakis, H. E., Rapti, Z., Frantzeskakis, D. J., Kevrekidis, P. G., Sodano, P., Trombettoni, A.
Publikováno v:
Phys. Rev. A 78, 023635 (2008)
Using a time-dependent linear (Rabi) coupling between the components of a weakly interacting multicomponent Bose-Einstein condensate (BEC), we propose a protocol for transferring the wavefunction of one component to the other. This "Rabi switch" can
Externí odkaz:
http://arxiv.org/abs/0805.0189
In this paper, we study the competition of linear and nonlinear lattices and its effects on the stability and dynamics of bright solitary waves. We consider both lattices in a perturbative framework, whereby the technique of Hamiltonian perturbation
Externí odkaz:
http://arxiv.org/abs/0707.1162
Publikováno v:
Phys. Rev. E 73, 051902 (2006)
We have recently suggested that the probability for the formation of thermally activated DNA bubbles is, to a very good approximation, proportional to the number of soft AT pairs over a length L(n) that depend on the size $n$ of the bubble and on the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601304
Publikováno v:
Europhys. Lett., 74 (3), pp. 540-546 (2006)
It appears that thermally activated DNA bubbles of different sizes play central roles in important genetic processes. Here we show that the probability for the formation of such bubbles is regulated by the number of soft AT pairs in specific regions
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511128
Autor:
Rapti, Z., Trombettoni, A., Kevrekidis, P. G., Frantzeskakis, D. J., Malomed, Boris A., Bishop, A. R.
We consider a system of two discrete nonlinear Schr\"{o}dinger equations, coupled by nonlinear and linear terms. For various physically relevant cases, we derive a modulational instability criterion for plane-wave solutions. We also find and examine
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409009