The performance gap between training sparse neural networks from scratch (PaI) and dense-to-sparse training presents a major roadblock for efficient deep learning.

The performance gap between training sparse neural networks from scratch (PaI) and dense-to-sparse training presents a major roadblock for efficient deep learning. According to the Lottery Ticket Hypothesis, PaI hinges on finding a problem specific parameter initialization. As we show, to this end, determining correct parameter signs is sufficient. Yet, they remain elusive to PaI. To address this issue, we propose Sign-In, which employs a dynamic reparameterization that provably induces sign flips. Such sign flips are complementary to the ones that dense-to-sparse training can accomplish, rendering Sign-In as an orthogonal method. While our experiments and theory suggest performance improvements of PaI, they also carve out the main open challenge to close the gap between PaI and dense-to-sparse training.

Apple is going big on privacy with a host of new iOS security features that let users choose when and where they share their personal data. Among the most pivotal features is what the company is calling'Sign-in with Apple,' an Apple-backed login feature that could help cut out competitors like Facebook and Google and make the ubiquitous social'sign-in' buttons a thing of the past. 'Sign-in with Apple' will allow users to opt out of sharing their name and email addresses with apps, and users will be able to authenticate using Face ID. Apple says it is cutting out companies like Facebook and Google by launching a'Sign-in with Apple' button that lets users encrypt their email and more. Craig Federighi, Apple's senior vice president of Software Engineering, introduced the new features at WWDC 2019 Apple has introduced a new secure login system similar to those already in use by Google and Facebook.

As expected, Siri will get some enhancements in the updated version of tvOS. The voice assistant can now search the system's database of 650,000 movies and shows using more complex topical queries, such as the "high-school comedies from the '80s" example Apple VP Eddy Cue used onstage at today's WWDC keynote. Siri can also search YouTube if you ask it to, using spoken commands such as "search YouTube for Draymond Green repeatedly assaulting other players." For streaming channels that include live programming, such as cable-company apps and Watch ESPN, Siri can now launch them immediately without having to futz around in the menu screen. Saying "watch (app name)" will quickly bring up a big-screen view of the live feed.