sign on, 1  to employ; hire. 2  to bind oneself to work, as by signing a contract: He signed on as a pitcher with a major-league team. 3  to start radio or television broadcasting, especially at the beginning of the day. 4  Computers. log1 (def 17a).
FROM FIBER TO FABRIC: ACETATE INTRODUCTION Initially invented in Europe as a varnish for airplane wings, acetate was first produced in the United States in 1924 making it the second oldest manufactured fiber.
These have been used to create cushioning systems in modern running shoes. In the 1970's a plastic called 'ethylene vinyl acetate (EVA)' was developed. This material revolutionised the construction of sports shoes. It was made up of tiny air bubbles that provide cushioning and absorbs shock.efore we investigate the type of footwear used by our athletes let's examine a modern football boot. If we look carefully we can see that it is made from a variety of materials chosen because of their individual properties.