39C3: Wheelchair Security – When a QR code bypasses all security mechanisms

An IT security researcher reveals how a wheelchair's QR code becomes a master key to all comfort functions.

How to build your own air quality meter with a Raspberry Pi and CO2 sensor

In winter, it’s important to ventilate living and working spaces regularly. Here’s how to make a homemade measuring station ...

Florida has dangerous animals that can kill. A list of the deadliest

Most shark bites in Florida are not deadly. However, there was an unfortunate 2010 attack where a 38-year-old Stuart man who ...
IEEE

A 23.2-to-26-GHz Low-Jitter Fast-Locking Sub-Sampling PLL Based on a Function-Reused VCO-Buffer and a Type-I FLL With Rapid Phase Alignment

Abstract: This article presents a type-II sub-sampling phase-locked loop (SSPLL) that achieves low jitter, low spur, and sub-$\mu $ s locking time when synthesizing millimeter-wave (mm-wave) ...