Bells and Bell Tones

Bells, Motels and Permutation Groups

This article is about the mathematics of ringing the changes. 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.

Acoustical properties of ancient Chinese musical bells

Ancient Chinese music bells can be traced back to the Shang dynasty (1600–1100 B.C.). In addition to their significance in history and metallurgy, they provide much insight into the design of musical instruments in the early years and continue to make important contribution to acoustics due to their unique acoustical properties and rich physical mechanisms. These music bells differ from carillo...

Groups and Bells

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.

Foot and mouth alarm bells

Cold, season, and incidence of bells palsy

Bell’s palsy is a relatively common disease characterized by the sudden onset of unilateral facial paralysis. Using a centralized system that contains demographic data, the authors estimated rates, trends, and demographic risk of Bell’s palsy during a 2-year period. There were 140 incident cases of Bell’s palsy among patients referring to private clinics (a total of 6500 patients). The crude in...