A new material developed at Penn State defies a fundamental law of physics, opening doors to highly efficient solar cells.

The LLSAW in lithium niobate on stress-free surface reveals rather high attenuation of the order of one dB per wavelength. Calculated resonant characteristics of a long IDT and dispersion curves of ...

The research and application of hybrid HVDC transmission systems are still in their infancy, In order to solve the problem that backup protection is affected by distributed capacitance and transition ...