Mr Besley acknowledged the downside risks to the economy from the energy shock and the credit crunch.
This involves high energy shock waves being directed at the stone.
Proponents also point to a recent study published in JAMA, which found that high-energy shock waves were better than low-energy waves in treating patients with shoulder tendinitis resulting from calcium deposits.
But Harvard orthopedic surgeon George Theodore, who helped conduct the Dornier study, claims that the failed studies are flawed because they used low-energy shock-wave pulses that were below the threshold needed to have a heel-healing effect, unlike the successful FDA studies that used higher energies.
Had this shock to energy prices happened even 18 months ago it would have derailed the economic recovery.
Its legs mimic an animal's legs, and are able to absorb shock and recycle energy as the machine moves around.
Traditionally, grid operators used banks of capacitors, which store and release energy, to act as shock absorbers for the grid.
When news broke in December that construction had briefly halted on The Bow, the showpiece headquarters of EnCana, Canada's largest independent energy firm, it sent shock waves across Calgary.
The particles get a little kick in energy every time they cross the shock front, and eventually they get accelerated to these massive energies that we detect here at Earth.
Several breakthroughs sent shock waves through the field of renewable energy this week as Inhabitat reported on a new type of "invisibility cloak" that could supercharge solar cells and researchers at MIT harnessed viruses to improve the efficiency of dye-solar cells by a full third.
But despite the energy savings, when consumers buy Energy Star products, they often face a bit of sticker shock.
In the energy complex, geopolitical risk tends to be a prevalent supply shock factor, as I recently have observed with Libyan crude oil output.
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The sticker-shock at the pump is a rude reminder that even though energy independence for the United States is closer at hand than at any other time in the last fifty years, energy is still very much a global commodity.
What's more, oil's share of the global energy market is down from almost 50% at the time of the oil shock of 1973.
If Venezuela's next leader were to end the program, or even reduce the generous terms, many countries would see a shock as import bills rise (not to mention having to face a public forced to pay much higher energy prices).
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