BAK - Disamat 801 Hot Air Welding Machine. BAK - Disamat 801 The welding machine for â¦more
The different grades of the Risser sign give a measure of bone maturity and thus of the skeletal growth to be expected. In Europe, a scale ranging from Risser 0 to Risser 5 defines the grades from beginning ossification to complete fusion of the apophysis to the iliac bone. In the USA, 4 grades are defined.
In mathematics, a Riemann sum is an approximation that takes the form â f ( x ) Î´ x {\displaystyle \sum f(x)\Delta x} . It is named after German mathematician Bernhard Riemann. One very common application is approximating the area of functions or lines on a graph, but also the length of curves and other approximations.