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.
DuPont put its Pioneering Lab to work finding a viable commercial version of Kwolek's new crystalline polymers, the potential applications for which were obvious. The result was Kevlar (first marketed in 1971), a fiber five times stronger ounce for ounce than steel, but about half the density of fiberglass. Kevlar is best known to the public as the material from the which bulletproof vests are made; and in this use alone Kwolek's discovery has saved thousands of lives.