Cadmium telluride photovoltaics, a solar energy generation technology once considered limited in its potential, is poised for significant growth in the United States, according to a team of scientists analyzed challenges and proposed corresponding research goals in new research published in the peer-reviewed journal Joule.

Concrete contains a diversity of materials that scatter sound waves and make clear imaging difficult to obtain. In Applied Physics Letters, researchers created a high-resolution 3D ultrasonic imaging system for concrete that automatically adapts to different types of structures, sending frequencies into the material and using a vibrometer to capture the outcoming waves. The system can handle a wide range of frequencies, which means that even if ultrasonic waves are scattered by materials in the concrete, those that do make it through are still detected.