Calibration is one of the most critical steps in the pH measurement process. Some of the common calibration-related problems include out-of-range slope values and cell constants, inaccurate readings ...

A robot may not injure a human being or, through inaction, allow a human being to come to harm. A robot must obey the orders ...

The thirty-three-year-old socialist is rewriting the rules of New York politics. Can he transform the city as mayor?