Mechanical crystals, also known as phononic crystals, are materials that can control the propagation of vibrations or sound waves, just like photonic crystals control the flow of light. The ...

Within the fields of everyday carry and travel security, the zipper lock is a category whose core structure has rarely been reexamined. For decades, most designs have relied on keys or simple ...

Each team sent a semester's worth of work down an 8-feet-by-1-foot track for head-to-head matches that lasted only seconds, ...