Energy-harvesting rubber could power phones
Posted by CNET on 29.01.10
Talk about the rubber hitting the road. Researchers from Princeton and Caltech have come up with a power-generating rubber material that could harness walking and other movement to charge electronic devices.
The material is made from nanoribbons composed of lead zirconate titanate , or PZT, a ceramic substance that's "piezoelectric," meaning it generates an electrical voltage when pressure is applied. The "piezo-rubber chips" are embedded in clear silicone rubber sheets that produce electricity when flexed.
Squamish—Powersmart (Ride 23)
For our last ride we had left a prime trail, Powersmart. Powersmart is accessed from the upper shuttle drop off point. Rolling left where we went
straight onto Bush Ape, Powersmart quickly drops down the hill. This trail is rated as
single black diamond advanced on the map and is on the upper edge of that rating in Squamish. The upper portion of Powersmart is the steepest with a dry-loose and loamy tread. Tree root supported drops and the occasional slab-rock turn drop are the major challenges. The drops are big, often near the roll-able limit and come frequently with steep sections in between. Powersmart benefited from[...]
bike tire.?
Posted by sarah33 in Maintenance & Repairs category on Nov 12, 2007
How can I change a bike tire. I had the bike. then got a new tube for it. Now the tire bike fit usually on the rim correctly? I need help because I usually ride to school but lately Ive been walking!
Posted by JC on Nov 12, 2007
Stuff the tube into the tire and then slide the bead on the rim workin one side at a time. you might need to position the cord into the groove (where the heads are spoken) then work around the line to the stem and inflate.
Posted by Pedro S on Nov 12, 2007