A dust sensor is an optical electronic system to detect fine particles such as dust. In principle, an optical dust sensor detects the dust particle concentration the in air by using an optical sensing ...

The ability of nations to defend their territorial airspace is a cornerstone upon which their sovereignty rests. Governments therefore invest tremendous resources to establish and maintain effective ...

Researchers report that they have invented new nanoscale sensors of force. They are luminescent nanocrystals that can change intensity and/or color when you push or pull on them. These 'all-optical' ...