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DES MOINES, Iowa After weeks of rolling without a winner, the Powerball jackpot has once again ballooned in time for its Wednesday night drawing, which will have an estimated $360 million jackpot -- considered the third largest Powerball jackpot and seventh largest jackpot of any kind in history.The jackpot has a $229.2 million cash value. Lottery officials expect jackpot totals of this size to continue to come in shorter intervals, thanks in part to a game redesign in January 2012 that increased the odds of winning some kind of prize, but also
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Aside from capacity, the worst thing about batteries is that they degrade with time, holding less power with every charge. But now scientists have developed a lithium ion material that can endure 30 times as many charge cycles as current cells. Part of a collaboration between Sharp and Kyoto University, the new material鈥攎ade of a lithium iron phosphate compound鈥攊s used at the cat
stanley canada hode to increase the longevity of batteries. These days, a typical laptop battery can endure 300 cycles before it retains just 80 percent of its original charge; the new material will produce cells that hold 80 percent after a staggering 10,000 cycles. The researchers knew that lithium iron phosphate held promise for use in batteries, but figured that they could make it incredibly durable by adding extra solute el
stanley cup ements into the mix. But instead of doing that by hand and testing each and every possibility, they used computer simulations to model how extra elements would change the material properties.
stanley cup While there no way to directly predict the lifespan of a battery made from these materials using computation, it is possible to estimate how their volumes change when they ;re lithiated and delithiated鈥攖hat fancy talk for charged and uncharged. It those changes in volume that cause batteries to, quite physically, break down and reduce performance, as microcracks form in the structures. The modeling found a theoretical new material with added silicon or aluminum w
