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Kweeped from fr.wikipedia.org by blindman 26 days ago - like it! -
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Sébastien Calemard
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Kweeped from fr.wikipedia.org by blindman 31 days ago - like it! -
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A device available for under $5, that can produce enough drinking water for a single adult, would cause a net annual economic benefit of $500 for the recipient in the economy that they presently reside in. The $500 estimate is the sum total of disease reduction, death rate reduction, and productivity increase that access to this water would result in. These gains would be cumulative for each subsequent year as well. Lastly, such a device would enable human settlement at greater distances from traditional water sources, as long as atmospheric humidity was above a certain level. Clearly, the $5 water purification device is a very compelling product for a humanitarian organization to distribute en masse.
The winner of the Water Liberation Prize of up to $50,000 will be the first person to invent a device that is either solar powered, manually cranked, or otherwise not dependent on the existence of an electrical grid, can produce at least 4 liters of potable (drinkable) water per day, either condensed from the air (as measured in approximate 50% ambient humidity) or filtered through a nanomembrane, and can be mass-produced (as demonstrated by a pilot run of no less than 100 units) for a cost of less than $5 per unit. The filter should be washable and re-usable, without requiring a periodic supply of new filters, as the device may be used in areas without access to a suitable distribution channel.
The prize will be awarded on December 31, 2015, by a panel of judges.
Kweeped from www.foresight.org by blindman 39 days ago - like it!
Montez votre trou d’aiguille sur la paroi d’une boîte. Mettez un papier photographique sur la paroi opposée puis fermez la boîte. Posez-la plusieurs minutes devant un bouquet de fleurs puis développez. Le bouquet de fleurs est sur le papier ; vous avez fait votre première photographie au sténopé.
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