Proportional-integral-derivative (PID) is the most common industrial technology for closed-loop control. A proportional-integral-derivative (PID) controller can be used to control temperature, ...

Inositols are ancient molecules that were probably first made by a common ancestor of Archaea and Eukarya more than 2,000 million years ago. They are used by relatively few Bacteria.The ...

Graphs of Sine and Cosine 1.2 An applet illustrating how the graphs of sine and cosine are related to the unit circle. Transformations of Functions 1.3 An applet illustrating how transformations ...

Alternative expressions for calculating the prolate spheroidal radial functions of the second kind $R_{ml}^{(2)}\left( {c,\xi } \right)$ and their first derivatives ...

Big advances in math can happen when mathematicians move ideas into areas where they seem like they shouldn’t belong. My latest story is about the mathematician June Huh, who came into the field late ...