RIST Popular Talk -56
Stochastic Modelling of Complex Systems
Date - 2nd November, 2022
(Late) Prof. S. Brajamani Singh Memorial Lecture (RIST Talk-56)
Research Institute Of Science And Technology (RIST)
Schedule: Date: 2nd November, 2022 (Wednesday)
Time: 2 p.m.; Venue: Dept. of Physics, Manipur University
Dr. Langlen Chanu Athokpam
Jawaharlal Nehru University, New Delhi;
Title: Stochastic Modelling of Complex Systems
Abstract: Stochastic processes are used to study dynamical properties of various complex systems at varying scales ranging from protein structural dynamics, gene expression, cellular pathways, biochemical reaction networks, chemical systems, disease dynamics, social dynamics, astrochemical dynamics, etc.
A stochastic approach to studying complex systems using the chemical Master equation formalism and stochastic simulation methods can reveal hidden dynamical patterns and behaviours, especially the roles of fluctuations in the system dynamics.
For example, stochastic fluctuations are found to play important roles such as the emergence of demographic stochasticity in epidemics or noise-enhancement in non-equilibrium autocatalytic chemical reaction network systems.
Biological cells are complex biochemical systems which are open systems where much of the biological activities are contributed by different transport processes and non-linear chemical reactions. They exhibit far from equilibrium dynamics. Inside a biological cell, biomolecular processes function far from equilibrium by consuming free energy out of the ATP hydrolysis cycle and are dissipative.
This naturally leads to a free-energy cost. The Thermodynamic Uncertainty Relation is a fundamental relation between the free-energy cost of maintaining such non-equilibrium processes and the relative uncertainty in the random variable quantifying the output of such processes.
Again, complex biological systems generally show non-Markovian dynamics. Time delay is a form of non-Markovian character and exists everywhere, whether big or small. The role of time delay in complex systems is found to be multi-functional.
N. Nimai Singh,
Convener, RIST popular Talk Series
Research Institute Of Science And Technology (RIST)
Manipur University Complex,
Imphal – 795 001, India
* This information is sent by N. Nimai Singh who can be contacted at nimai03(AT)yahoo(DOT)com
This Post is webcasted on November 01 2022
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