An online book sale requires the exchange of a "token" (credit card number) that can be verified as valid.
Each subject was trained to exchange one type of token (A, B, or C) at a time, and the order in which they learned to exchange the three tokens was randomly determined.
In this study, we trained monkeys to exchange three types of tokens for three different foods.
"My wife and I are willing to end our case against the UK government and Messrs Straw and Allen in exchange for a token compensation of a British pound from each defendant, an apology and an admission of liability for what was done to us".
The exploit allows a hacker to pass an unusually high value to the exchange and get a ridiculous number of tokens in exchange, a problem that has caused the Okex exchange to shut down all token trading, including one called BeautyChain (BEC).
How does bitcoin mining work?The aim of bitcoin as envisaged by Satoshi Nakamoto, its elusive creator is to provide a way to exchange tokens of value online without having to rely on centralised intermediaries, such as banks.
The scientists trained the monkeys to exchange a token for a slice of cucumber.
Figure 10 Number of messages exchanged between a consumer and an ACP as a function of token lifetime, using 5 minute sampling periods.
So when one monkey was handed a grape in exchange for her token, the second was reluctant to hand hers over for a mere piece of cucumber.
In an era when it was not easy to get photographs or portrait likenesses, hair lockets were a lasting reminder of a family member or friend, and New Year's, Christmas and Valentine's Day were popular times for an exchange of hair lockets and other sentimental tokens.
Moreover, the failure rate of token generation is higher than token consumption effects.
