The aim of the project is to study unusual phenomena in a flow of a fluid through a given domain when the fluid enters the domain through one part of the boundary (the inlet) and leaves it through another part (the outlet). A typical example is a flow in a pipe of finite length when the ends of the pipe represent inlet and outlet of the flow domain. Another example is given by meteorology. Conventional short-time weather forecast involves solving equations of fluid mechanics in a domain which is bounded by two meridians and two parallels. The boundary of this forecast domain is, of course, permeable for air and the problem of boundary conditions naturally arises. A mathematical model that can be numerically studied using computers appears only after such boundary conditions are specified. One more important example is the problem of calculation and design of ventilation systems based on blowing or exhaustion of air. A key requirement here is to ensure the absence of stagnation zones in a ventilated room. Surely, certain approaches to this problem have been developed in practical engineering, but the creation of a more fundamental theory will, no doubt, eventually lead to considerable improvement of such empirical methods. Finally, we should mention a similar problem of transport of an admixture (e.g. a pollutant) in the atmosphere and ocean when there are its sources and sinks. The importance of such problems is evident already from the above examples.-However, they are still insufficiently explored. In fact, in fluid mechanics overwhelming majority of papers deal with fluid flows which are either bounded by rigid impermeable walls or extend to infinity.In this project, mainly flows of an inviscid fluid are studied, and the effect of small viscosity is taken into account by the asymptotic theory of boundary layers, special attention being paid to boundary layers at the outlet. All the phenomena listed below, being known for viscous fluids, are completely unknown in inviscid fluid dynamics. First we consider the existence and uniqueness problem for steady and forced time-periodic flows. Also, we point out conditions for non-existence of these regimes caused by permanent acceleration of motion. When a steady or forced time-periodic flow exists, natural questions about its stability and instability, dependence on parameters and branching arise. We study the stability of steady and both forced and self-oscillatory periodic flows paying special attention to non-existence of stagnation zones (the case of proper ventilation). We investigate the general problem of monotonouos and oscillatory instability of a steady flow and corresponding transitions to steady and self-oscillatory secondary regimes. Parametric resonance and parametric stabilization/destabilization effects will be also studied. The possibility of creation of stagnation zones will be specially examined. General approaches will be realized for a number of flows in rectilinear and curved pipes and ducts with various distributions of velocity and vorticity at the inlet.

My project explores C17 reading as an erotic act, analysing C17 reading pleasures and redefining the relationship between sex and text. Historians largely focus on 'active' scholarly reading, banishing pleasure to the periphery of studies. My thesis reconstructs the identity of the 'pleasured reader' by considering the pleasurable experience of reading and how this was embodied. It explores less overtly-erotic texts and challenges notions of a hegemonic pornographic genre, drawing on autobiographical and didactic accounts of reading, marginalia and a variety of printed texts to uncover sexual and sensual early modern reading experiences.

This project will unravel the molecular, biochemical and structural details of the mechanisms used by viruses to recognize their own genome and to package it into the viral capsid. You will work with viruses that infect bacteria (bacteriophages) and novel selfless viruses that indiscriminately package and spread any and all DNA within a host cell with no preference for their own genome. This project will be multidisciplinary using techniques such as mutagenesis, cloning, fluorescence imaging, flow cytometry, next generation sequencing, super-resolution microscopy, in vitro enzymatic assays, in vivo infection assays and cryo-electron microscopy. The Department of Biology at York offers opportunities for advanced training in use of cutting-edge technologies and data analysis in R/Python. You will also be offered varied graduate skills training together with valuable academic experience such as attendance at conferences and seminar series plus opportunities to participate in outreach activities.

The proposed study specifically examines fertility, motherhood, and family experiences of black African transgender women in South Africa. Transgender (TG) is an umbrella term used to describe individuals who identify with a gender incongruent to their sex assigned at birth.

Kestrel is a programme written at York which uses semi-empirical methods for the interpretation of UV/vis, magnetic spectroscopic and magnetic susceptibility measurements for transition metal complexes. The programme currently takes as its input the d-electron count of the metal ion, the arrangement of ligands around the metal (from X-ray structure) and so-called 'e-values' which reflect directly the bonding of individual ligands to the metal. Kestrel's current output gives EPR g values, d-d transition energies and magnetic susceptibilities. The proposed studentship will now extend this output to include X-ray absorption transition energies, MCD energies and band intensities and, finally, UV/vis transition intensities of metalloenzymes (LPMOs) and small molecule Cu complexes which can potentially act as catalysts for the same reaction that LPMOs carry out. The project will also seek to integrate a new artificial intelligence input for Kestrel.