Linfield College: Study Abroad in Tunisia, Italy, and Austria

This letter from returnee Matt Davies explains the value of studying abroad in Tunisia, Italy, and Austria

Corehead Orchard Tree Establishment and Grazing Damage Survey 2013: Report to the Borders Forest Trust

The research report describes the history of fruit orchards in Scotland and monitoring of efforts to establish a traditional fruit orchard. Comparisons are made of the performance of different fruit varieties during the first two years of growth and the effects of deer browsing are discussed

Nonbanks in the payments system

Nonbanks have always been a key component of the nation's payments system. In recent years, however, nonbanks have become even more prominent. This heightened visibility raises several questions. In which payments activities are nonbanks engaged? What roles do nonbanks play in specific payments types? What types of risk are potentially associated with nonbank participation? This paper begins to address these questions. Preliminary findings include: (1) Nonbanks are involved in a myriad of activities and roles, both in traditional and emerging payments types; (2) Nonbank business relationships with banks and other participants in the payments systems are often highly complex and interrelated; (3) Nonbanks are rarely directly involved in settlement activities and, hence, appear to be associated with limited settlement and systemic risk; (4) Both nonbanks and banks appear to be increasingly susceptible to operational risk factors. ; Published as a book in 2003.Payment systems ; Nonbank financial institutions ; Nonbank activities

Oppositions in News Discourse: the ideological construction of us and them in the British press

This thesis seeks to explore textually instantiated oppositions and their contribution to the construction of ‘us’ and ‘them’ in specific news texts. The data consists of reports of two major protest marches taken from news articles in UK national daily newspapers. The aim of the thesis is to review and contribute to the development of existing theories of oppositions (often known as ‘antonyms’), in order to investigate the potential effects of their systematic usage in news texts and add an additional method of analysis to the linguistic toolkit utilised by critical discourse analysts. The thesis reviews a number of traditional theories of opposition and questions the assumption that oppositions are mainly lexical phenomena i.e. that only those codified in lexical authorities such as thesauruses can be classed as true opposites. The hypothesis draws on Murphy (2003) to argue that opposition is primarily conceptual, evidence being that new ones can be derived from principles on which opposition is based. The dialectic between ‘canonical’ and ‘noncanonical’ oppositions allows addressees to process and understand a potentially infinite number of new oppositions via cognitive reference to existing ones. Fundamental to the discovery of co-occurring textually-constructed oppositions are the syntactic frames commonly used to house canonical oppositions, which, this thesis argues, can trigger new instances of oppositions when used in these frames. I conduct a detailed qualitative analysis of textually constructed oppositions in three news articles, and show how they are used by journalists to positively and negatively represent groups and individuals as mutually exclusive binaries, in order to perpetuate a particular ideological point of view. The final section is an examination of how critical discourse analysis studies into the construction of ‘us’ and ‘them’ in news texts can be enhanced by a consideration of constructed oppositions like those explored in the thesis

A Case Study of the Population Ecology of a Topmouth Gudgeon (Pseudorasbora parva) Population in the UK and the Implication for Native Fish Communities

1. The topmouth gudgeon Pseudorasbora parva is a small Asian cyprinid species that has proved invasive throughout many European countries. Following an initial introduction into the wild in 1996, the species is now proving invasive in the UK, with at least 25 infested waters in England and Wales, of which 10 are known to have direct connection to a major river catchment. 2. To demonstrate the threat of P. parva to fisheries in the UK, a case study is presented on a lake located in the Lake District of England where the species was introduced in 2000. The species rapidly established a breeding population that, by 2003, was the dominant species in size classes <70 mm. In 2004, they were the only species in the lake that produced young-of-the-year. 3. Individual P. parva adopted the reproductive tactics of early maturity, multiple spawning, male dominance and male nest guarding; sexual dimorphism was manifested in larger body size of males. These traits were in contrast to the resident, native species of the lake, including roach Rutilus rutilus and gudgeon Gobio gobio, which adopted traits of later maturity and single spawning. 4. This case study, therefore, revealed relatively rapid establishment of a P. parva population, their subsequent numerical dominance of the fish community, and the impediment of the recruitment of native fish. The implications for UK fisheries are concerning: should P. parva continue to disperse and individuals adopt similar traits as those in this case study, there may be few waters immune from their invasion, numerical dominance and subsequent impacts

A High-Level Programming Language for Modelling the Earth

Computational models based on the solution of partial differential equations (PDEs) play a key role in Earth systems simulations. The software implementing these models depends on the discretisation method, data structures and the computer architecture. For this reason, it is difficult for scientists to implement new models without strong software engineering skills. In this paper, we present a computational modeling language (escript) based on the object-oriented scripting language (Python). This language, is designed to implement PDE-based models with a high degree of abstraction from the underlying discretization techniques and their implementation. The main components of escript are the Data class objects which handle data with a spatial distribution and the linearPDE class which define linear PDEs to be solved in each step of a time integration or non-linear iteration scheme. As an example we will discuss the solution of the Lame equation and the implementation of a quasi-static model for crustal fault systems

A High-Speed Portable Ground Heat Exchanger Model for Use in Various Energy Simulation Software

A portable component model (PCM) of a ground source heat pump system was developed and used as a test case in the creating of a PCM development framework. By developing this framework, new building energy simulation models will be able to be easily integrated into existing simulation software such as EnergyPlus and the Modelica Buildings Library. Our model uses a time responsive g-function and numerical methods to simulate ground source heat pumps for single time steps as well as long time scales. We validated our model against GHESim and GLHEPro and found that our model agrees with these two standards within acceptable ranges of error. This allows for development of the PCM framework to have a functional test case for trouble shooting errors during the development process. Future work on this model to include non-uniform time steps would allow it to be used independent on other software as a standalone system

Elasticity, Yielding and Episodicity in Simple Models of Mantle Convection

We explore the implications of refinements in the mechanical description of planetary constituents on the convection modes predicted by finite element simulations. The refinements consist in the inclusion of incremental elasticity, plasticity (yielding) and multiple simultaneous creep mechanisms in addition to the usual visco-plastic models employed in the context of unified plate-mantle models. The main emphasis of this paper rests on the constitutive and computational formulation of the model. We apply a consistent incremental formulation of the non-linear governing equations avoiding the computationally expensive iterations that are otherwise necessary to handle the onset of plastic yield. In connection with episodic convection simulations, we point out the strong dependency of the results on the choice of the initial temperature distribution. Our results also indicate that the inclusion of elasticity in the constitutive relationships lowers the mechanical energy associated with subduction events