Why Momentum Really Works

Step-size α = 0.02 Momentum β = 0.99 We often think of Momentum as a means of dampening oscillations and speeding up the iterations, leading to faster convergence. But it has other interesting behavior. It allows a larger range of step-sizes to be used, and creates its own oscillations. What is going on? Here’s a […]

8 mins read

The best cheap Android phones to buy in 2025

You don’t need to spend a fortune to get a new phone that handles your daily tasks with ease. The best cheap Android phones pack impressive features into affordable price tags, making them great options for anyone who wants solid performance without stretching their wallet. Whether you’re scrolling social media, streaming videos or snapping photos, […]

8 mins read

The Download: AI doppelgängers in the workplace, and using lidar to measure climate disasters

—James O’Donnell Digital clones—AI models that replicate a specific person—package together a few technologies that have been around for a while now: hyperrealistic video models to match your appearance, lifelike voices based on just a couple of minutes of speech recordings, and conversational chatbots increasingly capable of holding our attention.  But they’re also offering something […]

1 min read

Android Droppers Now Deliver SMS Stealers and Spyware, Not Just Banking Trojans

Sep 01, 2025Ravie LakshmananMobile Security / Malvertising Cybersecurity researchers are calling attention to a new shift in the Android malware landscape where dropper apps, which are typically used to deliver banking trojans, to also distribute simpler malware such as SMS stealers and basic spyware. These campaigns are propagated via dropper apps masquerading as government or […]

4 mins read