The postage stamp-sized chip can store a hidden message that is only revealed when exterior humidity levels surpass 60 percent. The image can then be concealed again by bringing humidity back down. In ...
Interesting Engineering on MSN
New microscopy method speeds 3D brain scans while using fewer measurements
Researchers at the University of Hong Kong have developed a new microscopy technique that ...
A research team from HKU Engineering has pioneered a fundamentally new imaging strategy known as AIMED (Arbitrary illumination microscopy with encoded depth), which utilizes a sub-sampling approach.
Tech Xplore on MSN
Optical device uses humidity to unlock hidden information and offers new option for data storage
Engineers at the University of California San Diego have developed an optical device that reveals hidden images and changes ...
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