Download Technology Review - May-June 2011 by Jason Pontin PDF
By Jason Pontin
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Extra info for Technology Review - May-June 2011
Sample text
Her field is something of a technological battleground, with many different approaches competing to power a new generation of cars. “None of this is obvious,” she says. —Kevin Bullis Ann mArie sAstry (sakti3) smaller and lighter lithium batteries will make electric vehicles more competitive. indd 50 Making cloud computing more secure Homomorphic Encryption C raig Gentry is creating an encryption system that could solve the problem keeping many organizations from using cloud computing to analyze and mine data: it’s too much of a security risk to give a public cloud provider such as Amazon or Google access to unencrypted data.
It all the electrode’s lifetime and prevent heat adds up to more than half the bulk of typi- buildup, the battery must be cooled and cal lithium-ion-based systems, making them prevented from ever fully charging or discumbersome and expensive. So in 2007, she charging, resulting in wasted capacity. All founded a startup called Sakti3 to develop this adds bulk and cost. So Sastry wondered solid-state batteries that don’t require most if she could make a battery that simply of this added bulk. They save even more didn’t need this much management.
Founded in 2005 and first housed within Florida International University’s technology incubator, City Labs originally partnered with Lockheed Martin Florida to develop betavoltaic batteries. Like photovoltaic cells, betavoltaic batteries absorb radiation, but instead of sunlight, the radiation comes from a physical source that emits electrons. City Labs focused on tritium as a radiation source, as tritium—one of the most benign radioisotopes—is already used to power the phosphorescent glow in the watches used by divers and in exit signs (the signs are not battery powered).