Gerard Westendorp has a real knack for geometry, and here is his answer. Here is Thurston’s procedure. First draw the lattice of Eisenstein integers in the complex plane: ...

Step 1 - FBD: Draw a free body diagram of the crate. Step 2 - Kinetics: Write down the Newton/Euler equations for the crate. Be careful with your moment equation. Since the crate has no fixed points, ...

Peter M. Euler, age 73, passed at the McLeod Hospice Center, Florence, SC. He was born and spent most of his life in the New York area. Peter was a Veteran of The United States Military Army Forces.

This program is useful for visualizing approximations of energy band diagrams, and performing back-of-the-envelope calculations of their important parameters. Energy bands can be modeled at varying ...