There are generators with enough power for home backup that roll on wheels and technically are portable. But when we talk about “portable generators” we’re usually referring to models that are small ...

A laser is usually constructed from two basic elements: a material that provides optical gain through stimulated emission and an optical cavity that partially traps the light. When the total gain in ...

Created and produced by parents of young children, WBUR's Circle Round adapts carefully-selected folktales from around the world into sound- and music-rich radio plays for kids ages 3-103. Each 15 to ...

KOHLER backup generators automatically switch on in the event of a power outage. Generators help run electricity to your home for appliances, whole-home circuits, sump pumps, HVAC units and water ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Around 1900, American mathematicians ...