Dear All, We are delighted to present the MaPSS Seminar topic of Monday 16/10; please see the abstract below. **This Semester the Seminar will always run on Monday, at 5:00pm in 535A** Following the talk, there will be pizza on offer. Speaker: Ishraq Uddin (Sydney University) Title: Cell crowding effects and tissue growth models: an incomplete survey Abstract: This talk presents a brief survey of PDE models for the growth of tissues and cell populations influenced by cell crowding effects. We first discuss how such models may be obtained from agent-based and stochastic models of cell behaviour within limited space by taking an appropriate continuum limit. We also discuss multiphase models, which provide a purely continuous framework for modelling cell behaviour and also open doors to free boundary problems. We motivate our models with reference to specific biological systems including bacterial chemotaxis, neural crest cell colonisation, and atherosclerotic plaque formation. Along the way, we also discuss how the nonlinearities appearing in the diffusion and advection terms for specific models may be interpreted biologically, as well as the difficulties in defining where the boundary is for a cell population or tissue. Supervisors, please encourage your students to attend. Thanks, MaPSS Organizers