Wellbore curvature and torsion greatly influence the forces applied on the downhole pipe string and its consequent deformation. They serve as the bases for calculating the drag and torque of a pipe ...

Uber has created more than a booming ride-sharing market. It’s given economists a treasure trove of data to understand one of the fundamental concepts of economics: the demand curve. Steven Levitt, ...

This paper formulates a mathematical model for generating receiver operating characteristic (ROC) curves without underlying data. Credit scoring practitioners know that the Gini coefficient usually ...