Some computers are easy to spot. Artificial, human-built computers like those found in smartphones and laptops are abstract dynamic systems with observable computational elements like input, output, ...

The squeaking of sneakers on a gym floor is usually attributed to friction, specifically a stick-slip variety that involves cycles of sticking and sliding between two surfaces. But that model is best ...

As he watched the Boston Celtics play from the stands of TD Garden, one noise kept catching Adel Djellouli's ear. “This squeaking sound ...