Donald Metcalf (1929–2014)

And Donald

In 1983, Popper and Miller published in Nature a new argument against inductive probability. There followed, the next year, a discussion of the validity of the argument in the pages of the same journal involving Good, Jeffrey, and Levi as well as Popper and Miller themselves. This has led in turn to still further discussions of the argument. Those who are critical include Redhead (1985) and Dun...

Donald Monro (1727–1802)

Chalmers-Metcalf operator and uniqueness of minimal projections

Weknow that not all minimal projections inLp (1<p<∞) are unique (see [B. Shekhtman, L. Skrzypek, On the non-uniqueness ofminimal projections inLp spaces]).The aimof this paper is examine the connection of the Chalmers–Metcalf operator (introduced in [B.L. Chalmers, F.T. Metcalf, A characterization and equations for minimal projections and extensions, J. Oper. Theory 32 (1994) 31–46]) to the uni...

Ian Donald (1910?1987)

Ian Donald [3] was an obstetrician who developed ultrasound [4] diagnostics during the twentieth century in Europe. Ultrasound is a medical diagnostic technique that uses sound waves to produce images of the inside of the body. During the early 1900s, physicians had no way to see inside a woman?s uterus [5] during pregnancy [6]. Donald developed the first method of scanning human internal anato...

Donald Henry Barron.