In my professional life, anxious energy drove me to do research for my undergrad thesis, complete my doctorate, and write a few books.

However, time required to complete a doctorate also varies according to the candidate's abilities and choice of research.

A small but very successful group of students completed their doctorates under her supervision.

After completing his doctorate, he worked as a consultant on many exciting projects, such as assessing the safety qualification of gas-cooled nuclear reactors.

Completing a doctorate after retirement, he was enthusiastically drafting manuals in his 90s.