The hypnotic third novel in the hit Danish series grapples with the philosophical realities of being stuck on repeat in 18 November The time loop story, in which characters repeatedly relive the same ...

Scientists have long been puzzled by why the Sun’s corona is over a million degrees Celsius while its surface is only about 5,500°C, and how the solar wind accelerates to high speeds. Donald Trump ...

Most of the big ideas in science have the decency to confine themselves to one or two disciplines. Evolution is strictly in the biological realm. E=mc 2 wouldn't be caught dead outside physics. And ...

A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...

Abstract: Due to the multiscale characteristics of defects and strong background interference, the automation of solar cell surface defect detection is still a challenge. To address this problem, this ...

Abstract: Window design in overmoded waveguides that achieves both broadband and high power is a challenge in the vacuum electronic devices. Here, a broadband overmoded meta-surface-assisted window ...

The work presented in this study is concerned the development of a new solar cell prototype in order to improve photovoltaic efficiency In this model we show that the material can have five and more ...