Challenge.gov, which celebrated its fifth anniversary this fall, showcases requests by government agencies to the public to tackle hard problems in exchange for cash prizes and other incentives.
All transactions are published on a shared public ledger, called the "block chain," and verified by "miners," users whose powerful computers solve difficult math problems in exchange for freshly minted bitcoins.
Cryptocurrencies, such as bitcoin and its successors, are backed by a system of "miners", who race to be the first to solve tricky computing problems in exchange for a reward for doing so.
Peter is a harbinger of the next "is" shift toward what Abraham Maslow called "self-actualization". Work is no longer only about solving technical problems in exchange for a paycheck.
This is very different from Bitcoin, which must be mined through machines solving complex cryptographic problems in exchange for small amounts of the currency awarded at fixed time intervals.
To get around that problem, and in exchange for the relaxed capital rules, the banks volunteered to let the commission examine the books of their parent companies and subsidiaries.
The fund-raiser, Roger Chugh, said he had powerful contacts in the township government, Ms. Pollepalli said, and he offered to make her problems disappear in exchange for a $3,000 donation to Mr. McGreevey's campaign for governor.
Fifteen right-handed college undergraduates (9 females, age range 18 22 years, mean age 19.8 years) with no history of neurological problems participated in exchange for pay or course credit.
The central problem is that in exchange for access to Sudanese oil, Beijing is financing, diplomatically protecting and supplying the arms for the first genocide of the 21st century.
