The effective mirror size for a virtual telescope made up of spacecraft flying in formation depends on the separation of those spacecraft.

ECONOMIST: Birds of a feather

It needed a shorter duration, and a larger size to be effective.

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It is incredibly clear that the current policy of TB control is an abject failure, so carrying on as we are is doomed to increase the size of any effective future badger cull.

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Toshiba is committed to offering users a connected world, where devices are used together to form a simple, effective media offering regardless of screen size.

ENGADGET: Toshiba updates TG01 handset with the TG02

Inside sales is far more efficient and more effective at creating revenue in small and mid-size businesses over the phone and through the internet.

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The Federal Reserve, the European Central Bank (ECB) and the Bank of England all rejected Iceland's requests, stating, according to the Central Bank of Iceland, that the Icelandic financial system was too large relative to the size of the economy for plausible swap lines to be effective.

ECONOMIST: Iceland

The size of that devaluation would be the extent of the country's effective default against its creditors.

ECONOMIST: The euro

OkCupid's Mr Yagan argues that the size of the fee that most paid sites charge is not big enough to act as an effective filter.

ECONOMIST: Online dating

However, Mr Adachi added that, since the government had not given details on the size and specifics of the package, it was "difficult for anyone to think this will be effective".

BBC: Yen notes being counted

Despite its impressive size, the group will need to include some of these key players if it hopes to be truly effective.

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