A gate insulating film is formed on the principal surface of a semiconductor substrate. The cutting blade assembly consists of an outer and at least one inner concentrically arranged cutting blade, where each cutting blade has a close-loop cross-sectional shape. A sample of particulates collected from an item of mail is either removed for analysis or analyzed in the system to identify a contaminating agent. In a similar fashion the system and method determines a sweep liquidity bid price and a momentum liquidity bid price, they are compared and the system and method publishes one. More specifically, fringe numbers are determined for points on the object surface based on image data. Other embodiments are described and claimed.