A circuit which is equivalent to a four-port circulator with one port terminated, called a quasi-circulator, is proposed. The quasi-circulator can replace a conventional circulator even though it is ...

Like its name suggests, it is big and it is quiet. It’s been made to circulate clean air in large rooms while standing in a corner instead of in the center of a space to be at its most effective ...

Without the bliss of modern air-conditioning, try this trick inspired by our ancestors over two million years ago ...