Lancaster University

About: Lancaster University is a education organization based out in Lancaster, Lancashire, United Kingdom. It is known for research contribution in the topics: Population & Context (language use). The organization has 13080 authors who have published 44563 publications receiving 1692277 citations. The organization is also known as: The University of Lancaster & Lancaster University.

Ascent and eruption of basaltic magma on the earth and moon

Abstract: The ascent and emplacement of basaltic magma on the earth and moon is modeled by the application of geological and physical observations and constraints. Relatively simple mathematical models of the motion of gas/liquid mixtures are shown to be adequate in the treatment of basaltic eruptions, provided that allowance is made for the coalescence of gas bubbles and that realistic geological and petrochemical constraints are applied to the numerical values of variables. Because gas exsolution from magmas on the earth and moon commonly occur at depths of less than 2 km, it is generally convenient to consider separately the rise of bubble-free magmatic liquid at depth in a planetary crust and the more complex motions occurring near the surface with gas exsolution.

The impact of agricultural soil erosion on biogeochemical cycling

Abstract: Soils are the main terrestrial reservoir of nutrients, such as nitrogen and phosphorus, and of organic carbon. Synthesizing earlier studies, we find that the mobilization and deposition of agricultural soils can significantly alter nutrient and carbon cycling. Specifically, erosion can result in lateral fluxes of nitrogen and phosphorus that are similar in magnitude to those induced by fertilizer application and crop removal. Furthermore, the translocation and burial of soil reduces decomposition of soil organic carbon, and could lead to long-term carbon storage. The cycling of carbon, nitrogen and phosphorus are strongly interrelated. For example, erosion-induced burial of soils stabilizes soil nutrient and carbon pools, thereby increasing primary productivity and carbon uptake, and potentially reducing erosion. Our analysis shows soils as dynamic systems in time and space.

Statistical Modelling Issues in School Effectiveness Studies

Abstract: SUMMARY The assessment of school effectiveness in educational research studies is considered from the viewpoint of statistical modelling. A variety of models are applied to a set of data on 907 pupils in 18 schools from one Local Education Authority. We argue for the general use of variance component or "random parameter" models for the analysis of such studies involving clustered observations. For the data examined, the model which regresses school mean outcome on school mean intake (i.e. the "means on means" model) is shown to give estimated school effects considerably different from those produced by other models. In the light of our results, we comment on several recent large-scale British studies of school effectiveness.

Converging Conventions of Comfort, Cleanliness and Convenience

Abstract: Many commentators analyse green consumption as if it were an expression of individual environmental commitment. Such approaches suppose that the adoption of more sustainable ways of life depends upon the diffusion of "green" beliefs and actions through society. In this article, the author explores the idea that patterns of resource consumption (especially of energy and water) reflect what are generally inconspicuous routines and habits. Are such conventions evolving or standardising in ways that are increasingly resource intensive? In addressing this question with reference to three domains of daily life: comfort, cleanliness, and convenience, four simple models of change are outlined, two of which imply an inexorable escalation of resource consumption, two of which do not. The purpose of this illustrative exercise is to demonstrate the importance of understanding the systemic redefinition of "normal practice." Rather than taking individual behaviour to be the central unit of analysis, the case is made for an approach that concentrates on the construction and transformation of collective convention. This theoretical reorientation opens the way for programmes of research and policy informed by an appreciation of the technological and the commercial as well as the symbolic and cultural dimensions of more and less resource-intensive ways of life.