One patient, in walking through the street, may be quite appalled at the approach of a runaway horse. The degree of appalment in another may be quite trifling.

semisupervised learning

A polygon's or polyhedron's Euler characteristic is just the number of corners minus the number of edges plus the number of faces.

The aerophore consisted of two main components — an air-filled canister about the size and shape of a lawn mower engine, which the diver wore on his back, and a new creation, a regulator, which automatically adjusted the pressure of the air in the tank to that of the water surrounding it.