288 results found displaying 7-9
    
 USA
Cellphone rechargers through phone talks Printer Friendly Version
Sound is a form of energy. And phones use cell/battery to run. They store electrical energy. While we talk over the phone we give out sound energy. We can have a small device which converts sound energy to electrical energy and charges the cellphone batteries while we speak. It can even be charged in a theatre, pub, discos, traffic signals basically anywhere with a decibel level.

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Kimberly Engel
 USA
Group Kitchens for the Homeless Printer Friendly Version
There is not enough housing available in the San Francisco Bay Area in California. In my small town of 1800, there are thirty people who live in their cars because their rental was sold. In hi-demand areas, people who work the low-paying service jobs cannot even find a room to rent at double their former rent. Rather than leave their jobs and friends by moving away completely, they move into in their cars to save money. If something else goes wrong, often these "homeless by choice" people can lose everything.
To avoid this from happening, I have "adopted" a number of car-dwellers, giving them limited access to my tiny home (showers, taking messages for job-seeking) in exchange for various chores. With this help, most of them eventually found housing. Some of these "recovered homeless" got together and rented a shared place. They decided to start a "pot-luck" evening twice a week for their other friends who were still living in cars: The car-dwellers agree to bring extra food. They prepare the food that's there and clean up the kitchen. The renters get food prepared for them and their dinner dishes get washed. Perhaps a car-dweller who has a job becomes a part of the house when a room becomes available.
Reward: The idea already works for me! 

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gorkov
 Russia
Portable solar umbrella Printer Friendly Version
Having recently spent a bunch of time in some of the world's hottest deserts, I wonder why no one has marketed a portable solar umbrella hooked up to a drinks cooler, or small cooling fan, or one of them electric cooling collar contraptions. Googling for 'solar umbrella' points to large unwieldy umbrellas good for patios and backyards - hardly convenient for hauling around.
Making these should be a no-brainer. You'd have to fix flexible solar panels on top of a folding umbrella, and run a wire through the handle. I bet somebody with a low cost production facility already making umbrellas could easily adopt this and do a pilot batch. You'd start by marketing in the Sky Magazine and the like, hopefully, it catches on to start mass production.
Reward: I'd personally test one of these in the Atacama Desert in Chile next July (a week long 250km ultra run). 

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