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 ...

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 true cause of anxiety is being a human being, gifted with the capacity to imagine a future. As a mental state of apprehension about what might, or might not, lie ahead, anxiety reflects ...