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.
Peak-to-Peak Constrast (Michelson Contrast, Modulation) measures the relation between the spread and the sum of the two luminances. This definition is typically used in signal processing theory, to determine the quality of a signal relative to its noise level.ontrast (Luminance Contrast) is the relationship between the luminance of a brighter area of interest and that of an adjacent darker area. Mathematically, the difference between the two luminances divided by the lower luminance.