Safecast

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An excellent NHK documentary describing the Safecast project in which a volunteer community developed radiation sensors that could be used to quickly monitor the spread of radioactivity following the Fukushima Daichi accident. The film also describes…

Hotspots of Hokkaido

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It is assumed that the value of crowdsensing rises as the number of data sources rises. However, the value of the aggregated data depends upon the accuracy of the data being aggregated. This is vividly demonstrated…