P4_8 Plasma Windows

The physics behind plasma windows are explored and it is investigated whether they would be applicable on a large scale as a divider between a vacuum and a pressurised hangar. It is found that while possible, it may be difficult due to the large energy need to ionise the plasma and the large scale nature of the magnetic field

P4_11 Solar Wind

The physics behind the solar wind is investigated in order to determine whether it is possible to have a star whose solar pressure could be held back by the local interstellar medium, thus placing it in hydrostatic equilibrium with no solar wind. It is found using a simplified model that such a star probably cannot exist

How landscapes remember

This paper considers the possibility that as subject or agent, the landscape might have the potential to contain, store or transmit memories of their past, which are engaged experientially as uncanny. In a simple sense it asks why there are some landscapes – or landscape features – that are regarded as spiritually animated by different social groups, at different times. The paper focuses on the Neolithic temple site of Borġ-in-Nadur, in Southern Malta, which as well as having been a site of prehistoric ritual activity has more recently been the site of a significant devotion to the Virgin Mary, who graced the site with regular apparitions, and a focus for national and transnational Goddess pilgrimage. The paper suggests that sites such as Borġ-in-Nadur can be seen as palimpsest landscapes, in which memory is layered such that experiential engagements with them draw the past in to the present, and forwards into the future. The paper examines the intertwining of prehistoric, Catholic and Neo-pagan engagements with Borġ-in-Nadur, extending Pierre Nora’s concept of lieux de memoire (sites of memory) to encompass the milieux de memoire, or memorial environments, which are themselves also context of, and for, the uncanny

Welfare and education in British colonial Africa, 1918–1945

The relevance of historical research for an explanation of the roots of contemporary educational policy and its relationship to notions of equity, democracy and development has been sadly neglected in recent years. This means that policy makers have forfeited the advantages of reflecting on the traditions and experience of past endeavors and examining them critically for potential understandings of present and future policy making. The aim of this paper was to direct the attention of researchers to the complexities and multifaceted nature of educational policy development in inter-war era (1918–1945), with specific reference to British colonial Africa and South Africa. It will also hopefully provide a set of elementary tools for all of those interested in educational policy-making strategies that seek to promote meaningful social, economic and political change in an age of uncertainty

Theory of Isolated Dopants in GaAs (110) Surfaces

In this thesis we perform a range of highly accurate density functional theory (DFT) calculations for a GaAs (110) slab containing almost all of the near-surface single atomic dopants from groups III, IV and V of the periodic table. We look in detail at the relaxed geometry and local density of states of the doped surface, and using the theory of Tersoff and Hamann we generate STM images of the different dopant systems. Where possible we compare to experimental results obtaining excellent qualitative and quantitative agreement, with bond lengths and shifts in STM contrast agreeing to within 0.03 Å and 0.09 Å respectively. We are able to show very clear trends in both the relaxed positions and STM image contrasts for the range of dopants. These trends are determined by the covalent radius of the dopants. Dopants with larger radii relax out of the surface and ones with smaller radii relax into the surface, and these relaxations cause the different contrasts in the STM images. These trends fit very well with existing results for nitrogen and silicon doped systems, and also allow us to fill in the gaps for those systems that have not been as thoroughly investigated. Our analysis applies equally across the three groups of dopants from the periodic table covering isovalent, donor and acceptor cases. By developing a geometrical model based on the covalent radii of the dopants and host atoms, we show how the covalent radius determines the geometry of the surface, which in turn determines the contrast seen in the STM images. Using this model we are able to explain and predict the relaxation and STM images for all the dopants in this work to a high degree of accuracy without relying on DFT simulations

P4_5 Can you Catch ‘em All?

The storage process of Pokémon is investigated using a system based on what is shown in the animé, and an alternative method is also investigated. It is found that only Pokémon under 6.5kg could be contained, however the temperature would quickly break the Pokéball. The alternative method of storing them as a current in a superconductor was also investigated however this method would produce a field of 1.87×107T