Competitive Service versus Excepted Service Positions. There are two types of non-executive positions in the federal government: 1) those that are in the competitive service, and 2) those that are in the excepted service. Competitive Service â Competitive service positions are subject to the civil service laws passed by Congress.
Post to Facebook. Kevlar inventor Stephanie Kwolek dies at 90 Stephanie Kwolek, the DuPont scientist whose invention, Kevlar, has saved countless lives as the essential ingredient in body armor, has died. Kwolek, of the Sharpley neighborhood in Talleyville, died Wednesday following a brief illness, said her friend, Rita Vasta, who is handling Kwolek's affairs. She was 90.
Typically kevlar is spun into ropes or fabric sheets that can be used as such or as an ingredient in composite material components.evlar is a very strong man made fiber, stronger than many metals. It is used where very high tensile (pulling) strength is needed. Its most famous use may be for body armor, and for military helmets. It is also used to make cut resistant gloves for people that work with sharp items.