The S&P 500 has made a rare move in recent times. It's only done this three times in more than a half-century, and every time, the same thing has happened next. Let's take a closer look and decide ...

Functions and modules for creating metric (ISO) and English (UTS) standard screws and nuts. Included is a function for calculating the standard dimensions of screws including the tolerance values that ...

Coal seams in Xinjiang region have the characteristics of large thickness variation, high dip angle, easy diameter enlargement and ... resistivity to true resistivity obtained from empirical formulas ...

First, you can specify the endpoints by vectors and the control points by angle, measured from X+ in the XY plane ... For our case, where we're closing the circle in 4 segments, the formula evaluates ...