A tool to help parents may have turned into a nightmare. According to a new report from a Norwegian consumer group, kids' smartwatches designed to help This Hackable Playhouse Turns Kids Into ...

(a) Unit optimization process with a hybrid continuous-discrete PSO algorithm. The particulars of the yellow and green boxes in the optimization are elaborated in (b) and (c), respectively. (b) The ...

Electromagnetic (EM) wave front modulation has important significance in both scientific researches and industrial applications. However, conventional dielectric materials have limited choices of ...