Mathematics of Life and Social Sciences seminars

These are the research seminars of Mathematics of Life and Social Sciences.

Seminar details

Day and time: Thursday's from 12 noon - 1pm.
Venue: 39 AA 04.
Open to: Staff and postgraduate research students.

For further information, please contact the organiser Dr Carina Dunlop.

Upcoming seminars

Speaker: Erik Fagerholm (King's College London)
Time and date: 12 - 1 p.m. on Thursday 6 June 2019
Title: Breaking the bonds of weak coupling: the dynamic causal modelling of oscillator amplitudes
Abstract:
Models of coupled oscillators are useful in describing a wide variety of phenomena in physics, biology and economics. These models typically rest on the premise that the oscillators are weakly coupled, meaning that amplitudes can be assumed to be constant and dynamics can therefore be described purely in terms of phase differences. Whilst mathematically convenient, the restrictive nature of the weak coupling assumption can limit the explanatory power of these phase-coupled oscillator models. We therefore propose an extension to the weakly-coupled oscillator model that incorporates both amplitude and phase as dependent variables. We use the bilinear neuronal state equations of dynamic causal modelling as a foundation in deriving coupled differential equations that describe the activity of both weakly and strongly coupled oscillators. We show that weakly-coupled oscillator models are inadequate in describing the processes underlying the temporally variable signals observed in a variety of systems. We demonstrate that phase-coupled models perform well on simulations of weakly coupled systems but fail when connectivity is no longer weak. On the other hand, using Bayesian model selection, we show that our phase-amplitude coupling model can describe non-weakly coupled systems more effectively despite the added complexity associated with using amplitude as an extra dependent variable. We demonstrate the advantage of our phase-amplitude model in the context of model-generated data, as well as of a simulation of inter-connected pendula, neural local field potential recordings in rodents under anaesthesia and international economic gross domestic product data.

Past seminars

Speaker: Sylvain Delahaies (Surrey)
Time and date: 12 - 1pm on Thursday 7th February 2019
Title: Predictive policing: myth or reality?

Speaker: Dr Ines Violante (Psychology, Surrey)
Time and date: 12 - 1pm on Thursday 10th January 2019
TitleDynamic modulation of brain states using brain stimulation

Speaker: Chandrakala Meena (Bar-Ilan University, Ramat Gan, Israel) 
Time and date: 12 - 1pm on Thursday 20 December 2018
TitleThreshold activated coupling stabilizes the chaotic states to steady states

Speaker: Lucas Franca (University College London)
Time and date: 12 - 1pm on Thursday 29 November 2018
TitleSeizure prediction: a computer science challenge?

MoLSS/SSRC Mathematical modelling of sleep/wake regulation afternoon
Time and date: 1:30pm - 3:30pm  on 18 June 2018

Victoria Booth and Cecilia Diniz-Behn will be visiting the Department of Mathematics and the Surrey Sleep Research Centre on the 18th June.  In a 2 hour session from 1:30pm-3:30pm (including a break) they will be giving talks as follows:

Speaker: Victoria Booth (Departments of Mathematics and Anesthesiology, University of Michigan)
Title: Modeling sleep-wake regulation: REM sleep mechanisms and dynamics

Speaker: Cecilia Diniz Behn (Department of Applied Mathematics and Statistics, Colorado School of Mines, & Department of Pediatrics, University of Colorado School of Medicine)
Title: What time do you have? Modeling interindividual variability in the human circadian system

Speaker: Joaquin Prada (University of Surrey)
Time and date: 12 noon - 1pm on Thursday 24 May 2018
Title: Neglected Tropical Diseases (NTD) control and elimination: Insights from mathematical models

Speaker: Jose Gimenez (University of Surrey)
Time and date: 12 noon - 1pm on Thursday 3 May 2018
Title: The economics of bacterial gene expression

Speaker: Gregory Faye (University of Toulouse)
Time and date: 12 noon - 1pm on Thursday 26 April 2018
Title: Rigorous derivation of the nonlocal reaction-diffusion FitzHugh-Nagumo system

Speaker: Lorna Wilson (University of Bath)
Time and date: 12 noon - 1pm on Thursday 19 April 2018
Title: Resilience of cocoa farming to climate variation

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Address
Department of Mathematics
AA Building, floor 4
University of Surrey
Guildford
Surrey
GU2 7XH