Roentgen (unit) Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays. It is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air. In 1928 it was the first international measurement quantity for ionising radiation to be defined for radiation protection, and was an easily replicated method of measuring air ionization directly by using an ion chamber. It is named after the German physicist Wilhelm Röntgen, who discovered X-rays. Although relatively easy to measure, it had
Nordic Society for Invention and Discovery Nordic Society for Invention and Discovery Nordic Society for Invention and Discovery is a Scandinavian invention lab, founded in 2013 by Per Cromwell and Tomas Mazetti. No More Woof is a device aiming to translate dogs thoughts into human language using electroencephalography sensoring. An experimental hockey puck inspired by the forms of the Finnish architect Alvar Aalto , researching what happens if the hockey puck isn't round. It's designed with the goal to maximize randomness and have been tested by hockey teams as Swedish Hammarby IF. A small prototype that can lift small animals (2.4 kg) a few centimetres (up