Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...

Welcome to the ME 270 course website for the Fall 2025 term. The material on this site is a complement to the lecture book for the course. And, all material here is accessible without the need to log ...

The border wall built during the Trump administration now stands along roughly 190 miles of Arizona's border with Mexico. • It's 30 feet tall in most places. • Its steel bollards are six inches wide ...