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Ever-changing patterns dance across LED strips in two of the four pieces in “Dynamic Loop-Modulating Algorithm,” Chen’s show at IA&A at Hillyer.

"Although IA has the right to lend print books it lawfully acquired, it does not have the right to scan those books and lend the digital copies en masse," he wrote.

“Sprig,” the Philadelphia artist’s IA&A at Hillyer show, features pieces that stretch or suspend fabric on wooden armatures.

IA began as a collaborative effort between airports, air navigation service providers and airlines.

There’s a lot of portraiture, actual or symbolic, in “The Ties That Bind,” presented by the Millennium Art Salon at IA&A at Hillyer.