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Iws 4


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Iws 4

  1. 1. This Week(ish) in Technology How Technology has Evolved Over the Years
  2. 2. March 4, 1877: New Kind of Microphone <ul><li>Berliner filed for a new patent on the microphone </li></ul><ul><li>Assured the future of the telephone; without this, telephones would have sounded terrible for decades and would not have been able to work for great distances </li></ul><ul><li>Supreme Court ruled that Edison invented the carbon microphone, not Berliner </li></ul><ul><li>However, it was common knowledge that transmitting speech by varying the current between two contacts as they affected sound waves </li></ul>
  3. 3. March 17, 1953: Black Box is Invented <ul><li>Australian researcher David Warren invented a device to record cockpit noise and instruments during flight </li></ul><ul><li>In response to jet-powered airliner crashes </li></ul><ul><li>Early versions could record up to four hours of voice instrument data </li></ul><ul><li>Initially, rejected for privacy reasons </li></ul><ul><li>After a 1960 crash in Queensland where the cause could not be determined, the Australian government required all commercial planes to carry a black box </li></ul>
  4. 4. Modern Black Boxes <ul><li>Must withstand several tests: pressure of being submerged to 20,000 feet below the ocean, 3,400-g crash-impact test </li></ul><ul><li>Future improvements: transmitting flight data in real time to ground stations - gained momentum after the Air France flight 447 disappeared in 2009 </li></ul>
  5. 5. March 8, 1955: Whirlwind Machine Invented <ul><li>Permanent set of instructions on how the computer should operate </li></ul><ul><li>Six years later - first digital computer that could display real-time and graphics on a video terminal </li></ul><ul><li>Used 4,500 vacuum tubes to process data </li></ul><ul><li>Occupied 3,300 square feet </li></ul>
  6. 6. March 11, 1985: Nations First Local, Public Packet- Switching Network <ul><li>Southern New England Telephone Company turned on ConnNet </li></ul><ul><li>Customers in Connecticut could access services such as Dow Jones News Retrieval, CompuServe, and the National Library of Medicine </li></ul><ul><li>Connections pulled down 300 to 1,200 bits per second (now, we are downloading more than 4,000 times as fast) </li></ul>
  7. 7. March 15, 1985: Internet’s First Domain Name Registered <ul><li>Symbolics .com registered - developed Al software </li></ul><ul><li>Noncommercial medium - military and academic tool </li></ul><ul><li>Only five were registered in 1985 - Apple registered in 1987; Microsoft registered in 1991 </li></ul><ul><li>Symbolics still exists </li></ul>