Weber introduced three independent factors that form his theory of stratification hierarchy; class, status, and power: 1  Class: A person's economic position in a society. 2  Weber differs from Marx in that he does not see this as the supreme factor in stratification.
carina - any of various keel-shaped structures or ridges such as that on the breastbone of a bird or that formed by the fused petals of a pea blossom 3. keel - one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability
The forward (leading) edge of the sail is called the luff, which, in a mainsail, is parallel to the mast. The aft (back) edge of a sail is called the leech (also spelled leach), which is opposite the luff, and forms the hypotenuse of the triangle.