Maxwell perturbations on asymptotically Anti-de-Sitter spacetimes: generic boundary conditions and a new branch of quasinormal modes

Perturbations of asymptotically Anti-de-Sitter (AdS) spacetimes are often considered by imposing field vanishing boundary conditions (BCs) at the AdS boundary. Such BCs, of Dirichlet-type, imply a vanishing energy flux at the boundary, but the converse is, generically, not true. Regarding AdS as a gravitational box, we consider vanishing energy flux (VEF) BCs as a more fundamental physical requirement and we show that these BCs can lead to a new branch of modes. As a concrete example, we consider Maxwell perturbations on Kerr-AdS black holes in the Teukolsky formalism, but our formulation applies also for other spin fields. Imposing VEF BCs, we find a set of two Robin BCs, even for Schwarzschild-AdS black holes. The Robin BCs on the Teukolsky variables can be used to study quasinormal modes, superradiant instabilities and vector clouds. As a first application, we consider here the quasinormal modes of Schwarzschild-AdS black holes. We find that one of the Robin BCs yields the quasinormal spectrum reported in the literature, while the other one unveils a new branch for the quasinormal spectrum.

Creating and sustaining mixed income communities: a good practice guide

A comprehensive guide to planning and consultation issues around mixed income communities. This guide explores how to create attractive and well-managed places that meet the needs of all sections of the community. Drawing on the latest research, and featuring nine case study areas, it includes detailed guidance on: developing a strategy and negotiating the planning process; good practice in masterplanning, design, layout and long-term financial viability; how stakeholders can collaborate effectively and ensure that local residents are fully involved at all stages; how barriers to the development of sustainable communities might be overcome. The guide explores all types of mixed income communities, from the diversification of single-tenure inner-city estates to greenfield development on the urban fringe.

Finding ‘Good Friday’ An explorative study into the sedimentary structures left from the Good Friday tsunami

Senior thesis written for Oceanography 444

For the Good of the Game(?): The Legacy of the Football Trust, the Football Pools & the Dangerous Seduction of Political Promise

During the late twentieth century, the United Kingdom’s football infrastructure and spectatorship underwent transformation as successive stadia disasters heightened political and public scrutiny of the game and prompted industry change. Central to this process was the government’s formation of an independent charitable organization to oversee subsequent policy implementation and grant-aid provision to clubs for safety, crowd, and spectator requirements. This entity, which began in 1975 focusing on ground improvement, developed into the Football Trust. The Trust was funded directly by the football pools companies who ran popular low-stakes football betting enterprises. Working in association with the Pools Promoters Association (PPA), and demonstrating their social responsibility towards the game’s constituents, the pools resourced a wide array of Trust activities. Yet irrespective of government mandate, the PPA and Trust were continually confronted by political and economic obstacles that threatened the effectiveness of their arrangements. In this paper the history of the Football Trust is investigated, along with its partnership with the PPA, and its relationship with the government within the context of broader political shifts, stadia catastrophes, official inquiries, and commercial threats. It is contended that while the Trust/PPA partnership had a respectable legacy, their history afforded little protection against adverse contemporary conditions.

Creating and sustaining mixed income communities in Scotland: a good practice guide

A good practice guide to creating and sustaining mixed income communities in Scotland. This guide explores how to create attractive and well-managed places that meet the needs of all sections of the community. Drawing on the latest research, and featuring 11 case studies from Scotland and England, it offers a comprehensive guide to the issues that need to be planned for and addressed. The book includes detailed guidance on: -Developing a strategy and negotiating the planning process; -Good practice in masterplanning, design, layout and long-term financial viability; -How stakeholders can collaborate effectively and ensure that local residents are fully involved at all stages; -How barriers to the development of sustainable communities might be overcome. The guide explores all types of mixed income communities, from the diversification of mono-tenure estates in inner city areas to greenfield development on the urban fringe.