Background—Current definitions of hypertension are based on levels of systolic blood pressure (SBP) and diastolic blood pressure (DBP), but not on pulse pressure (PP). We examined whether PP adds useful information for predicting coronary heart disease (CHD) in the population-based Framingham Heart Study. Methods and Results—We studied 1924 men and women between 50 and 79 years of age at baseli...

THE METHODOLOGY OF CLINICAL RESEARCH. By Max Hamilton, M.D., D.P.M. (Pp. viii+ 139. 21s.) Edinburgh and London: E. & S. Livingstone Ltd., 1961. THIS book is based on twelve lectures designed to give the beginner in clinical research an insight into t-he basis of experimental design. There is no attempt to explain statistical methods in detail but the principal statistical techniques available a...

The value of using a higher radix for modular multiplication in the context of RSA is investigated. The main conclusion is that for algorithms which perform the multiplication via repeated addition, there is, broadly speaking, a direct trade-off between space and time provided by change of radix. Thus chip area utilised is roughly proportional to speed. However, initially as the radix is increa...

1 T. G. Cowling, "The Magnetic Field of Sunspots," Monthly Notices Roy. Astron. Soc., 94, 39 48, 1933. 2 E. C. Bullard, "The Origin of the Earth's Magnetic Field," Observatory, 70, 139-143, 1950. 3W. M. Elsasser, "Hydromagnetism. I. A Review," Am. J. Phys., 23, 590-608, 1955. 4 S. Chandrasekhar, "On Force-free Magnetic Fields," these PROCEEDINGS, 42, 1-5, 1956; S. Chandrasekhar and Kevin H. Pre...

The development of consistent and stable quasicontinuum models for multidimensional crystalline solids remains a challenge. For example, proving the stability of the force-based quasicontinuum (QCF) model [M. Dobson and M. Luskin, M2AN Math. Model. Numer. Anal., 42 (2008), pp. 113–139] remains an open problem. In one and two dimensions, we show that by blending atomistic and Cauchy–Born continu...