Road helmets come in a few distinct categories. Standard 'ventilated' helmets are the most common, but almost every brand now offers a dedicated 'aero' helmet. These burst onto the scene in the ...

Proper handling of continuous variables is crucial in healthcare research, for example, within regression modelling for descriptive, explanatory, or predictive purposes. However, inadequate methods ...

Part 1 begins with an overview of properties of the real numbers and starts to introduce the notions of set theory. The absolute value and in particular inequalities are considered in great detail ...