The soil pore network and marcoporosity are important factors affecting water and solute transport. The transfer of contaminants to water resources is of particular importance in the Valle de Bravo watershed as it provides 10% of the drinking water for the 20 million inhabitants of Mexico City....

Chris Attfield, Michaela Glod and Jessica James suggest an approach to optimize hedging decisions for foreign exchange investments.

Scientists can make a valuable contribution to the world of finance. But, writes Jessica James, the models do not always predict the realities of market movements and behaviour of data.

This paper is concerned with the scope for developing countries to benefit from the Internet in non-synchronous ways that is, in cases where some delay is involved in the delivery of information, as compared with the real-time alternative used in developed countries. The first part of the paper...