C. E. WALLIS "FATHER" OF LONDON'S SCHOOL DENTAL SERVICE CHARLES EDWARD WALLIS was born in Lambeth on 25 March 1869, son of Fanny and Augustus Wallis; his father was an insurance clerk.' Wallis was educated at Bedford Grammar School and King's College Hospital, which was then sited in Portugal Street near the Strand.2 It was there that he gained the conjoint medical diploma in 1894. Following on...

This paper analyzes collective choices in a society with strategic voters and single-crossing preferences. It shows that, in addition to single-peakedness, single-crossingness is another meaningful domain which guarantees the existence of non-manipulable social choice functions. A social choice function is shown to be anonymous, unanimous and strategy-proof on single-crossing domains if and onl...

Introduction The number of people travelling to high altitude regions, especially in South America, Nepal and India, has risen enormously in the past 10 years. Alongside this increasing popularity of altitude trekking there has been an increase in the number of service expeditions. In October 2000, a Joint Service Expedition spent a month in Nepal attempting to scale Lobuche East, one of the tr...

Abstract. This paper studies the effect of deviating from the normal distribution assumption when considering the power of two many-sample location test procedures: ANOVA (parametric) and Kruskal-Wallis (non-parametric). Power functions for these tests under various conditions are produced using simulation, where the simulated data are produced using MacGillivray and Cannon’s [10] recently sugg...

A famous “curious identity” of Wallis gives a representation of the constant π in terms of a simply structured infinite product of fractions. Sondow and Yi [Amer. Math. Monthly 117 (2010), 912-917] identified a general scheme for evaluating Wallis-type infinite products. The main purpose of this paper is to discuss an interpretation of the scheme by means of Pólya urn models.