Ian Short


Month: December, 2009

Semi-log graphs

Introduction Last week E asked me about some biological data which could be modelled by an exponential curve, similar to the one shown below. It is the graph of a function such as f(x) = kexp(-sx), for positive constants k and s. Ellie had another version of this graph, shown below. I immediately thought that […]


Ecosia is a search engine that donates 80% of the advertising revenue it makes to the WWF. The money goes towards rainforest preservation. The search engine is powered by Yahoo! and bing, and it joins a number of emerging search engines with an environemtnal bias. Ecosia claim that their servers are powered by energy sources with […]

The Wave

The Wave was an event organised by the Stop Climate Chaos Coalition in London on 5 December 2009. The Stop Climate Chaos coalition comprises the WWF, the RSPB, Friends of the Earth, Greenpeace, Oxfam, and many other charitable bodies. The Wave was held before the environmental summit in Copenhagen. Approximately fifty thoursand people attended the […]

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