His recent project, Post Code, scans barcodes and turns them into tangible glitch cards with the images generated from the encoded digits.
The flip side of invisible payments is a potential additional decline in financial literacy as spending moves from tangible cash, via plastic cards to a merely a background process.
There's something about the tangible quality of cards and pieces that adds to those games in a way that digital versions never match.
"The industry needs to educate consumers," he said, "and help them to realize that there is tangible value in their card numbers and PINs".
But the fact that wetwo parents who work in the field of global healthdo not have a tangible, user-friendly vaccination card for each of our children at home speaks to the difficulty of keeping updated vaccination records.
"Pyongyang sees political pluses in meeting with the U.S., but Davies no doubt conveyed that sustained negotiations are simply not in the cards without tangible signs and actions by North Korea that there is something to negotiate about," Mr. Pollack said.
Certainly, anyone who watches the endless array of crime shows on television could spin out a host of scenarios from one of the few tangible clues -- the death card, with "Policeman, I am God" written on it.
What is more, the "Israelis" soon realise that their cards consist of tangible assets – starting with land – which they are being asked to give up for abstract declarations – on, for example, recognition of Israel – from people they hardly trust.
In 2000, he decided that he understood the fundamental science well enough to, in his words, "go for it," and, at the 2011 national meeting of the American Chemical Society, he announced a tangible breakthrough: a cheap, playing-card-size coated-silicon sheet that, when placed in a glass of tap water and exposed to sunlight, split the water into hydrogen and oxygen.
Gas cards are a tangible reminder of American inventiveness when it comes to money.
