For most of us who are not astronomers, the image that comes to mind when describing a reflecting telescope is of a huge instrument in its own domed-roof building on a mountain top. But a ...

Abstract: Active development is taking place in reconfigurable and static metasurfaces that control and optimize reflections. However, existing designs typically only optimize reflections from the ...

Abstract: Consider the presence of a human body, which could possibly be fake/dead, in the area under monitoring. The purpose of this paper is to determine whether the human body is a living person or ...

SINGAPORE: From 2026, secondary school students will not be allowed to use smartphones or smartwatches during school hours, including outside of lesson time. The Ministry of Education (MOE) announced ...