Abstract: A design of ultra-wide-angle reflective polarization conversion metasurfaces (PCM) is realized by using bi-layered metasurfaces backed with metal ground. The upper layer of the element is an ...

Abstract: A phase-shift pulse-frequency modulation (PS-PFM) for a full-bridge LCC resonant converter is proposed in this paper to reduce both switching frequency variation range and reactive power of ...

Snap released an updated AR operating system. Its release of its new consumer-focused Specs next year is highly anticipated. The company is still losing money as it invests in that technology. While ...

It hasn't been an easy journey for long-term Plug Power (PLUG-10.00%) investors. Since going public in 1999, shares have lost more than 99% of their value. With a market cap of just $2 billion, ...