A team of leading Japanese scientists have been working on the most efficient way for people to use their fingers when turning a knob. The team members, Gen Matsuzaki, Kazuo Ohuchi, Masaru Uehara, Yoshiyuki Ueno, and Goro Imura were rewarded for their dedication with an Ignobel Prize for Engineering.
This is one of the moments where we are not taking the mickey.
The world is a better place for their efforts. If you want to know more you can look up there paper.
“Experimental Studies on the Rotary Control of Columnar Knobs — The Number of Fingers used at the Time of starting Rotary Control,” Gen Matsuzaki, Goro Imura, and Maseru Uehara, Proceedings of the Third Asia Design Conference, 1998, pp. 37-40.