In trying to divine the direction of the U.S. economy we have a similarly useful signal, though one disregarded by most in the economic commentariat.

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Once again, the way the particles knock electrons off the stuff they are travelling through (this time the gas) provides a useful signal (detected by the wires).

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Prices for these later years (when demand is expected to catch up with supply) would have been close to the tariffs needed to make new plants profitable, sending a useful signal to investors.

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The money supply can often be a useful early-warning signal.

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Independent fact checkers have said that offshore drilling will have no short-term, and little long-term, impact on gas prices, but McCain has said it would be useful as a symbolic gesture to signal U.S. resolve not to be dependent on foreign oil.

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Forte features a colour OLED (Organic LED) display to indicate input and output signal levels, mic preamp gain and other useful information, with stylish motion graphics giving you detailed visual information.

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My testing shows that this signal is this is backward-looking and not very useful, but since a large number of people believe it, they act on it resulting in a self-fulfilling prophecy.

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It means that Dr Schneider can tell whether or not the signal from any particular binding site is too noisy to be useful in other words, whether it is a damaging mutation.

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Are these motions (which are never debated, but which MPs can sign up to, to signal their support), just "parliamentary graffiti", or do they serve a purpose useful enough to justify the expense.

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