We describe the mathematics which arises from a real-world activity, that of ringing the changes on bells. We present Rankin's solution of one of the famous old problems in the subject, and some open questions.

Background: Although several studies have been done but there are only few on the data of bells palsy's treatment with electrical stimulation home-based exercise versus proprioceptive neuro muscular facilitation (rhythmic initiation, repeated stretch) technique in bell’s palsy patients were not studied details.Aim: To know effects neuro- patients.Design: A Comparative study.Setting: This study ...

In alpine regions cows are often equipped with bells. The present study investigated the impact of wearing a bell on behaviour and heart rate variability in dairy cows. Nineteen non-lactating Brown-Swiss cows with bell experience were assigned to three different treatments. For 3 days each, cows were equipped with no bell (control), with a bell with inactivated clapper (silent bell) or with a f...