961 karma · joined March 8, 2016
"Tuning hyperparameters of learning algorithms is hard because gradients are usually unavailable. We compute exact gradients of cross-validation performance with respect to all hyperparameters by chaining derivatives backwards through the entire training procedure. These gradients allow us to optimize thousands of hyperparameters, including step-size and momentum schedules, weight initialization distributions, richly parameterized regularization schemes, and neural network architectures. We compute hyperparameter gradients by exactly reversing the dynamics of stochastic gradient descent with momentum."
But it's not feasible yet. Once it is, you can imagine collapsing the whole neural net zoo: you merely specify the input/output type/dimension and then it starts gradient-ascent over all the possible models as tweaked by internal hyperparameters.
And since Yahoo needs to detect porn of all races and there's plenty of black porn out there, it would be odd if their porn detector had such a huge gaping hole in it.
Hanson was an extreme libertarian long before he got tenure or joined GMU, or even before he invented prediction markets.
"Experts said it was likely that the NSA or FBI had approached other Internet companies with the same demand, since they evidently did not know what email accounts were being used by the target. The NSA usually makes requests for domestic surveillance through the FBI, so it is hard to know which agency is seeking the information.
Reuters was unable to confirm whether the 2015 demand went to other companies, or if any complied.
Alphabet Inc's Google and Microsoft Corp, two major U.S. email service providers, did not respond to requests for comment."
It's not a hard question to answer. You either are or are not searching all emails in realtime at the behest of the NSA.
That's an amusing comparison, given how much of Krebs focuses on offline ATM skimming, copying credit cards at point-of-sale terminals, hacking major retailers's CC databases, and using stolen cards at retail and mall stores to cash them out...
The state of the art was not CVS, Subversion, and Perforce when git had its first release in 2005. The state of the art was BitKeeper (which you might remember had a certain connection to Linus and git), Arch, Monotone, and Darcs, and Mercurial itself was first released almost simultaneously with git. And one can debate the extent to which git was an improvement on any of those on key features like cryptographic signing or UI/UX.
Neural networks know that objects move. See for example https://arxiv.org/abs/1511.05440 http://web.mit.edu/vondrick/tinyvideo/