Hydrogen From Tap Water

Spanish scientist José Antonio G. I. developed a prototype system to extract hydrogen from tap water without electrolysis. Pressurized air injected into a tank of water, ferrosilicon, and sodium hydroxide causes a chemical reaction to extract the hydrogen through two additional tanks that can produce 30 litres of hydrogen per minute. Allowing hydrogen to be generated at the point of consumption removes the need for hydrogen transportation.

Sonar Face Expressions

Engineers at Cornell University have demonstrated how facial expressions can be detected and recreated using sonar on a wearable placed on each side of the head. A machine learning model analyses the sonar echo produced from a speaker and microphone on each ear to detect changes in skin on the face. The system effectively recognises facial expressions with the same detail as a camera.


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