The numbers you see on the box don't always work out in real life. LED bulbs do last longer, but those claims about five to 10 years are estimates based on internal testing -- and companies are always ...

Abstract: In order to counteract the explosive escalation of wireless tele-traffic, the communication spectrum has been gradually expanded from the conventional radio frequency (RF) band to the ...

Abstract: Optical-wireless-communication (OWC) adopting spatial-light-modulator (SLM) allows optical-beam-manipulation. However, pixel-crosstalk induced by leakage of electric-field between pixels ...