Portal:Technology
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In 1975, Stephen Hawking and Jacob Bekenstein showed that black holes should slowly radiate away energy, which poses a problem. From the no hair theorem one would expect the Hawking radiation to be completely independent of the material entering the black hole. Nevertheless, if the material entering the black hole were a pure quantum state, the transformation of that state into the mixed state of Hawking radiation would destroy information about the original quantum state. This violates Liouville's theorem and presents a physical paradox.
- July 4: Virgin lizard reproduces
- June 26: University study finds U.S. defense contract information in 'electronic waste' in Africa
- June 25: Saturn moon may contain liquid water
- June 24: U.S., Mexico and U.K. top medalists at RoboGames 2009
- June 23: Category:January 13, 2005
- June 19: Fans worldwide queue for new iPhone
- June 19: Mexican therapy increases survival of cervical cancer patients
- June 19: Canada's supercomputer goes online
- June 19: NASA launches two space probes to the moon
- June 16: Study says nearly every species of animal engages in homosexual behavior
- ... that both the Mozilla Firefox and Microsoft Internet Explorer web browsers descended from Netscape Navigator?
- ... that a coherer, hot wire barretter, electrolytic detector, cat's whisker and vacuum tube were all types of radio detectors?
- ... that in 2008 Hewlett-Packard created a prototype of the theoretical fourth and last passive circuit element, the memristor, that may one day revolutionize electronics, although the theory was devised in 1971?
- ... that a mercury arc rectifier converts alternating current to direct current by means of an electric arc through mercury vapor?
- ... that only one of the 266 1076 Class steam locomotives built for the Great Western Railway was named, and the rest had only numbers?
- ... that the six Charles Tayleur locomotives ordered by Isambard Kingdom Brunel for the Great Western Railway were unsuccessful?
- ... that the intensity of a tropical cyclone (pictured) is usually determined by the Dvorak technique using only visible and infrared satellite images?
- ... that the technique of double-balloon enteroscopy allows any position along the gastrointestinal tract to be visualized in real-time?
- Main outlines: Outline of science and Outline of technology.
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Notes
- ^ "Definition of robotics - Merriam-Webster Online Dictionary". http://mw1.merriam-webster.com/dictionary/Robotics. Retrieved on 2007-08-26.
- ^ "Industry Spotlight: Robotics from Monster Career Advice". http://content.monster.com/articles/3472/18567/1/industry/12/home.aspx. Retrieved on 2007-08-26.
- Main categories: Technology and Applied sciences
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