This colorful poster boils down the basics of data normalization into five simple rules, perfect for the wall of a database programming or design class. This pdf document, created by Marc Rettig, details the five rules...

In 1953, Gottfried Moellenstedt invented the electron biprism, more or less by accident, with the serendipity characteristic to him: Aiming at dark-field imaging in an electron microscope, he stretched a thin tungsten...

A=B, by Petkovsek, Wilf, Zeilberger, is a book about identities, especially identities involving binomial sums and hypergeometric identities, and ways to prove them using computer programs. The entire text may be...

This module is provided by Nano4Me.org, a product of the National Center for Nanotechnology Applications and Career Knowledge (NACK Center) which is based at the Penn State College of Engineering and is funded through...

Created by Senior Research Associate Nari Mistry at Cornell University, this 23-page pdf gives a brief but thorough introduction to particle physics. Complete with illustrations, this document covers sub-atomic...