| [ POSTECH ] in KIDS 글 쓴 이(By): guest (Ceramist) <posb.postech.ac.> 날 짜 (Date): 2000년 3월 19일 일요일 오전 12시 00분 33초 제 목(Title): [Pump]Enineering Impacts of the 20th cen (http://www.aaes.org) National Academy of Engineering Reveals Top Engineering Impacts of the 20th Century: Electrification cited as most important Here is the complete list of achievements 1) Electrification ? the vast networks of electricity that has literally powered the developed world. 2) Automobile ? in one form or another, revolutionary manufacturing practices made the automobile the world’s major mode of transportation by making cars more reliable and affordable to the masses. 3) Airplane ? flying made the world accessible, spurring globalization on a grand scale. 4) Safe and Abundant Water ? preventing the spread of disease, increasing life expectancy. 5) Electronics ? vacuum tubes and, later, transistors that underlie nearly all modern life. 6) Radio and Television ? dramatically changed the way the world received information and entertainment. 7) Agricultural Mechanization ? leading to a vastly larger, safer, less costly food supply. 8) Computers ? the heart of the numerous operations and systems that impact our lives. 9) Telephone ? changing the way the world communicates personally and in business. 10) Air Conditioning and Refrigeration ? beyond convenience, it extends the shelf life of food and medicines, protects electronics, and plays an important role in health care delivery. 11) Interstate Highways ? 44,000 miles of U.S. highway without a single stop signallowing goods distribution and personal access. 12) Space Exploration ? going to outer space vastly expanded humanity’s horizons and introduced 60,000 new products on Earth. 13) Internet ? a global communications and information system of unparalleled access. 14) Imaging Technologies ? revolutionized medical diagnostics,.reprographics, and photography. 15) Household Appliances ? eliminated strenuous, laborious tasks, especially for women. 16) Health Technologies ? mass production of millions of antibiotics and artificial implants led to vast health improvements. 17) Petroleum and Gas Technologies ? the fuels that energized the 20th century. 18) Laser and Fiber Optics ? applications are wide and varied, including almost simultaneous worldwide communications, non-invasive surgery, and point-of-sale scanners. 19) Nuclear Technologies ? from splitting the atom, we gained a new source of electric power. 20) High Performance Materials ? higher quality, lighter, stronger, and more adaptable. |