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History Main article: History of electromagnetism Aristotle attributes the first of what could be called a scientific discussion on magnetism to Thales, who lived from about 625 BCE to about 545 BCE. Around the same time in ancient India, the Indian surgeon, Sushruta, was the first to make use of the magnet for surgical purposes. […]
Overview The Nike Air Max shoe uses a large air cushioning unit at the heel which is visible from the side of the midsole in most models. Different types of Air Max cushioning include “Air Max2” which does not have the “holes” in the cushioning unit and is of high pressure, “Tube Air” which is […]
Based in Vancouver, BC, Canada, AVI was established in 1989 to manufacture high quality loudspeaker drivers. The initial AVI products, all designed by chief engineer Howard Doctor, were high performance subwoofers for car audio applications. With computer modeling of driver behaviour still in its infancy, his team built many prototypes over several months, re-testing and […]
Invention of pinhole camera See also: Camera obscura As far back as the 4th century BC, Greeks such as Aristotle and Euclid wrote on naturally-occurring rudimentary pinhole cameras. For example, light may travel through the slits of wicker baskets or the crossing of tree leaves. It was the 10th-century Arab physicist, astronomer and mathematician, Ibn […]
< BR> HC Home Network News : Reporter was informed by the China Household Electrical Appliances Research Institute, Australian Wool Corporation and Beijing Dazhong Electric Company jointly organized the "International pure wool mark Washing machine Certification conference "on Jan. 30 in medium and large electrical appliances shop in the tower held. China Household Electrical Appliances […]
