Piṅgala is a mathematician (c. 300 BCE) who authored Chandah. śāstra (the science of Sanskrit metres). This is a brief note on a mathematical art project completed at the Chennai Mathematical Institute to honour Piṅgala who was responsible for the discovery of binary expansion of numbers in the context of enumeration of metres, and of the binomial coefficients which were later made explicit by ...

Abstract The term lacus generally identified the public fountains in main streets of ancient Roman towns, providing for population daily water demand. simplest consisted a stone basin and spout stone, concealing one or two supply pipes. 35 street this type have been surveyed Pompeii, to gather information on their its variation time. A new method was devised calculating discharge through overfl...

INTRODUCTION Concerns about the influence of sugar-sweetened beverage consumption on obesity have led experts to recommend that water be freely available in schools. We explored perceptions about the adequacy of drinking water provision in a large California school district to develop policies and programs to encourage student water consumption. METHODS From March to September 2007, we used s...

An analytical procedure for examination of fountain pen and ballpoint pen inks was developed, using the PrinCe 550 capillary electrophoresis system with spectrophotometric detection. Samples were taken from ink lines in the form of paper microdots of 0.8 mm diameter. The ink sample was extracted from paper with pyridine-water solution (1:1). The detection was performed at wavelengths of 215, 37...

The cold polar glaciers of the McMurdo Dry Valleys (MCMDV), Antarctica, are characterized by low accumulation (10 cmw.e. a), high sublimation (7–9 cmw.e. a) and low melt rates (1–3 cmw.e. a) (Fountain and others, 1998). Meltwater production and flow is limited to the near surface of these cold polar glaciers, where the average ice temperature at 15m depth is –178C. Meltwater flow, as on other g...