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A CAP tradeoff in the wild

There’s a classic tradeoff between safety and liveness in the context of replicated data systems, originally proposed by Eric Brewer and later made precise by Seth Gilbert and Nancy Lynch. The idea is that, in a networked system of servers that is vulnerable to partitions (that is, where messages betweeen servers can be arbitrarily delayed, perhaps forever), it’s impossible to ensure both that when servers respond to requests, it’s with the “right” response (consistency, a safety property), and that every request eventually receives a response (availability, a liveness property). ....

Josh Berkus , Nancy Lynch , Seth Gilbert , Eric Brewer , Xudong Sun ,

Scientists study violent 'superflares' on stars thousands of times brighter than the sun

Scientists have used solar flares from the sun to determine the physics driving powerful and violent superflares on massive stellar bodies that are up to 10,000 times brighter than our star. ....

United States , Xudong Sun , Exoplanet Survey Satellite , Hawaii Institute , Astronomy Postdoctoral Researcher Kai Yang , Associate Professor Xudong Sun ,