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...physically strong as its dense counterpart. There is a trade-off of compressive strength against thermal insulation performance. In practical construction this material can be used to form the inner leaf of a cavity wall supplementing the main insulation, which is likely to be some form of mineral wool or plastic foam within the cavity. Figure 7 shows samples of these...

...physical, biological and chemical processes and is not easy to predict for different systems. Nitrogen is not stored and released from sediments in the same way, so its turnover time within aquatic systems is quite rapid. Nitrogen concentrations tend to fall off relatively quickly following a reduction in external nitrogen loading, whilst this is not true for phosphorus...

...Physics from Edinburgh. I knew I didn’t want to be a physicist when I grew up and one of my professor’s colleagues was setting up a new interdisciplinary group looking at energy down at the Cavendish Labs in Cambridge and offered me the chance to do a PhD there, so I grabbed it. And that’s where my interest started, a little bit on and off, but I’ve been looking...