Evolved gas analysis of hydrated phases in Murchison and Orgueil

To better characterise the hydrated minerals in chondrites Evolved Gas Analysis of Murchison, Orgueil and selected minerals has been carried out. Meteorite water release profiles show significant differences to expected reference minerals

Experimental study of laboratory-heated CM2 chondrites Mighei and Murchison

We conducted experimental heating of two CM2 chondrites, Murchison and Mighei, to study changes in their oxygen isotopic compositions and mineralogy and explore possible genetic relationships between MCCs and normal CMs

The reproductive performance of South African indigenous goats grazing Leucaena leucocephala pasture and natural veld during gestation

(South African J of Animal Science: 2000, 30, Supplement 1: 4-6

Assessing and improving sustainability of urban water resources and systems : AISUWRS work-package 4 : field investigations final report

This final field investigations report comprises the second part of Deliverable D10 of the project “Assessing and Improving the Sustainability of Urban Water Resources and Systems” (AISUWRS). It is jointly produced by the UK partners the British Geological Survey and the Robens Centre for Public and Environmental Health of the University of Surrey. The AISUWRS project is a 3-year urban water research programme partly funded by the European Community 5th Framework Programme-Shared Cost Research Technological Development and Demonstration. It aims to develop an innovative modelling system of the urban water infrastructure that can inform decision support systems for cities that depend on underlying or nearby aquifers for their water supply. Doncaster is one of the four case study cities being examined in Work Package 4 of this project; the others being Rastatt (Germany), Ljubljana (Slovenia) and Mt. Gambier (Australia). Since the publication of the interim report (CR/04/022N), the UK project team at the Robens Centre and the BGS have completed the field investigations phase and used the results to write a number of technical papers for publication in peer-reviewed journals or conference proceedings. This report brings together the drafts of these papers as they provide most of the key results of the field investigations in a concise form. The key findings of the field-based investigations described in these papers is brought together at the end as an Outcomes and Conclusions section, while the new data (analytical results) collected from Work Package 4’s field monitoring and surveillance activities in the Doncaster area are listed in Appendices 1 and 2

Exactly soluble model for self-gravitating D-particles with the wormhole

We consider D-particles coupled to the CGHS dilaton gravity and obtain the exact wormhole geometry and trajectories of D-particles by introducing the exotic matter. The initial static wormhole background is not stable after infalling D-particles due to the classical backreaction of the geometry so that the additional exotic matter source should be introduced for the stability. Then, the traversable wormhole geometry naturally appears and the D-particles can travel through it safely. Finally, we discuss the dynamical evolution of the wormhole throat and the massless limit of D-particles.Comment: 16 pages, 3 figures, revte

Isotope Effect in the Presence of Magnetic and Nonmagnetic Impurities

The effect of impurities on the isotope coefficient is studied theoretically in the framework of Abrikosov-Gor'kov approach generalized to account for both potential and spin-flip scattering in anisotropic superconductors. An expression for the isotope coefficient as a function of the critical temperature is obtained for a superconductor with an arbitrary contribution of spin-flip processes to the total scattering rate and an arbitrary degree of anisotropy of the superconducting order parameter, ranging from isotropic s-wave to d-wave and including anisotropic s-wave and mixed (s+d)-wave as particular cases. It is found that both magnetic and nonmagnetic impurities enhance the isotope coefficient, the enhancement due to magnetic impurities being generally greater than that due to nonmagnetic impurities. From the analysis of the experimental results on La-Sr-Cu-M-O high temperature superconductor, it is concluded that the symmetry of the pairing state in this system differs from a pure d-wave.Comment: 4 pages, 3 figure