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This has a very specific effect on the device. If signals in the form of current have transited it within the last few seconds, it'll still be in the "on" state, and the current will travel with low resistance. Longer than that, however, and Ostwald ripening ensures that it goes back to the off state, meaning that any additional signals face high resistance. This also sets an activity threshold for the memristor, as it has to receive more than one signal in quick succession before it will become active—again, a bit like a neuron. … [Read more...] about Memristor that forgets makes a good model neuron

The authors didn't test this technique with a vaccine, but they did show that cells of the skin take up DNA and express any proteins it encodes. So, the general principle seems to be sound. And, just like the POD developers, this paper's authors suggest that the material properties of the injection could be tuned to adjust the timing and strength of the DNA release. Plus, the polymers are stable for extended periods at room temperature. … [Read more...] about Peptide depots and DNA tattoos could deliver drugs in the future

It’s also rare that pop culture affords the notorious a careful reappraisal. Lately, the stars of ‘90s gossip headlines are getting a better rap than most, sitting at the confluence of an industry in dire need of content and an audience voracious for new stories about the heroes they grew up with. Though it’s imperfect, Tiger can serve as a reminder that the easy stories aren’t necessarily the ones we should be telling. In truth, we should meet our heroes — and think about who the villains really are, too. … [Read more...] about Tiger and the need to complicate the world we grew up in

CNN Chief International Anchor Christiane Amanpour tweeted, "Larry King was a giant of broadcasting and a master of the TV celebrity/statesman-woman interview. His name is synonymous with CNN and he was vital to the network's ascent. Everyone wanted to be on Larry King Live. May he Rest in Peace." … [Read more...] about Broadcasting legend Larry King dies at 87

Together the sisters from a powerful trio of good witches who are destined to protect the lives of innocent people from demons and other dark forces. Although each sister has their own individual magical power, they are actually stronger when they work together as the "Power of Three" to defeat their enemies. Macy, Mel and Maggie are helped by a Whitelighter named Harry Greenwood who serves as their advisor while protecting and guiding the witches as they discover the true nature of their magical power. … [Read more...] about How to watch Charmed online from anywhere