In submarine warfare, for instance, it would not be too difficult to develop, at a low cost, expendable devices that can be left in the sea to form barriers, and they wouldn't expend any power until they needed to".
And if network users are not willing to expend that power, then the whole system won't work.
Intelligent Smartphone Covers: Expend the power of a smartphone through functional cases such as a gamepad, stylus or e-ink flip cover.
Six-time Olympic champion Usain Bolt's stature (6ft 5in, or 1.95m) adds to his athletic prowess with a giant stride length, even if he has to expend greater power and energy to overcome drag caused by air resistance.
Health- Calculate how much human energy was expended to power the Trireme ship.
Final predictions for 2014 include Germany will win most golds at the Sochi winter Olympics Apple will release an "iWatch" Brazil will win the World Cup Bashar Assad will strengthen his hand in Syria The World in 2015 will appear in NovemberWhere else should Cassandra have expended her powers of prophecy?
Without such an incentive, they have no reason to expend valuable computational power, merely to help validate other people's transactions.
I've gotten used to living with despair: that so little of our effort, energy, intelligence and determination are invested in creating a sustainable future; and, indeed, that humanity's macro-organizations, its national governments, its multinational business enterprises, expend their enormous power not only contributing to the devastation but sabotaging every effort to make it stop.
If one's threats are sufficiently credible, and if meeting one's demands is not devastating in itself, one may be able to leverage one's powers to influence many of the activities of others, while only rarely being required to expend one's powers in enforcement.
Since, the power expended in computation is quite insignificant than the energy exhausted in communication, n CA survives quite long to function as the processing node.
