Organiser: Susana Gomes
The Applied Maths Seminars are held on Fridays 12:00-13.00. This year the seminar will be hybrid: you can choose to attend in person in room B3.02 or on MS Teams. The team for the seminar is the same as last year, but if you are not a member, you can send a membership request via MS Teams or email the organiser.
Please contact Susana Gomes if you have any speaker suggestions for term 2.
Seminar Etiquette: Here is a set of basic rules for the seminar.
- Please keep your microphone muted throughout the talk. If you want to ask a question, please raise your hand and the seminar organiser will (a) ask you to unmute if you are attending remotely or (b) get the speaker's attention and invite you to ask your question if you are in the room.
- If you are in the room with us, the room microphones capture anything you say very easily, and this is worth keeping in mind ☺️
- You can choose to keep your camera on or not. Colleagues in the room will be able to see the online audience.
- Please let me know if you would like to attend any specific talk in person and/or have lunch with any of the speakers who are coming to visit us so that I can make sure you have a place in the room.
|1||08 Oct||CIcely Macnamara (Glasgow)||online||An agent-based model of the tumour microenvironment (abstract)|
|2||15 Oct||Nabil Fadai (Nottingham)||F2F||
Semi-infinite travelling waves arising in moving-boundary reaction-diffusion equations (abstract)
|3||22 Oct||Jemima Tabeart (Edinburgh)||F2F||Parallelisable preconditioners for saddle point weak-constraint 4D-Var (abstract)|
|4||29 Oct||Jamie Foster (Portsmouth)||F2F||
Mathematical modeling of brewing espresso (abstract)
|5||05 Nov||Louise Dyson (Warwick)||TBC||
|6||12 Nov||Upanshu Sharma (Berlin)||F2F (will visit the whole week)||
Coarse-graining of non-reversible stochastic differential equations (abstract)
|Olga Mula (Paris Dauphine)||online||
|8||26 Nov||Clarice Poon (Bath)||online||TBC (abstract)|
|9||03 Dec||Tom Montenegro-Johnson (Birmingham)||F2F (will also give the colloquium)||TBC (abstract)|
|10||10 Dec||Peter Baddoo (MIT)||F2F||TBC (abstract)|
The term cancer covers a multitude of bodily diseases, broadly categorised by having cells which do not behave normally. Cancer cells can arise from any type of cell in the body; cancers can grow in or around any tissue or organ making the disease highly complex. My research is focused on understanding the specific mechanisms that occur in the tumour microenvironment via mathematical and computational modelling. In this talk I shall present a 3D individual-based force-based model for tumour growth and development in which we simulate the behaviour of, and spatio-temporal interactions between, cells, extracellular matrix fibres and blood vessels. Each agent is fully realised, for example, cells are described as viscoelastic sphere with radius and centre given within the off-lattice model. Interactions are primarily governed by mechanical forces between elements. However, as well as the mechanical interactions we also consider chemical interactions, by coupling the code to a finite element solver to model the diffusion of oxygen from blood vessels to cells, as well as intercellular aspects such as cell phenotypes.
Week 2. Nabil Fadai (Nottingham) - Semi-infinite travelling waves arising in moving-boundary reaction-diffusion equations
Travelling waves arise in a wide variety of biological applications, from the healing of wounds to the migration of populations. Such biological phenomena are often modelled mathematically via reaction-diffusion equations; however, the resulting travelling wave fronts often lack the key feature of a sharp ‘edge’. In this talk, we will examine how the incorporation of a moving boundary condition in reaction-diffusion models gives rise to a variety of sharp-fronted travelling waves for a range of wavespeeds. In particular, we will consider common reaction-diffusion models arising in biology and explore the key qualitative features of the resulting travelling wave fronts.
Week 3. Jemima Tabeart (Edinburgh) - Parallelisable preconditioners for saddle point weak-constraint 4D-Var
The saddle point formulation of weak-constraint 4D-Var offers the possibility of exploiting modern computer architectures. Developing good preconditioners which retain the highly-parallelisable nature of the saddle point system has been an area of recent research interest, especially for applications to numerical weather prediction. In this presentation I will present new proposals for preconditioners for the model and observation error covariance terms which explicitly incorporate model information and correlated observation error information respectively for the first time. I will present theoretical results comparing our new preconditioners to existing standard choices of preconditioners. Finally I will present two numerical experiments for the heat equation and Lorenz 96 and show that even when our theoretical assumptions are not completely satisfied, our new preconditioners lead to improvements in a number of settings.
We give a brief introduction to current practices in cafe-style espresso extraction. Making the tastiest cup is considered an art rather than a science, however, processes can be made more systematic by better understanding the physical processes underlying brewing. We develop a physics-based mathematical model for the extraction process. Owing to the disparity in lengthscales between that of a grain within the "puck" and the depth of the whole "puck", the model can be systematically reduced via asymptotic homogenisation. The reduced model can then be solved by numerical methods. We will show that the model is able to reproduce some of the trends that are observed in experimental data and in practice. We also discuss possible strategies to make espresso more efficiently and more reproducibly.
Week 6. Upanshu Sharma (Berlin) - Coarse-graining of non-reversible stochastic differential equations
Where possible, visitors should obtain an EDUROAM account from their own university to enable internet access whilst at Warwick.
You can register for any of the symposia or workshops online. To see which registrations are currently open and to submit a registration, please click here.
Mathematics Research Centre
University of Warwick
Coventry CV4 7AL - UK