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.
- March 25: Comedian Stephen Colbert wins NASA space station name contest
- March 23: Son of poet Sylvia Plath commits suicide
- March 20: Portions of Wikileaks, Wikipedia blocked in Australia
- March 17: Fossilized remains of small dinosaur rediscovered in Canada
- March 15: Space Shuttle Discovery successfully launches after a month of delays
- March 12: Apple reveals new iPod shuffle with voice
- March 12: Space debris threatened International Space Station, astronauts temporarily evacuated
- March 12: Launch of Space Shuttle Discovery further delayed
- March 10: North Korea warns airlines over satellite fears
- March 7: NASA successfully launches Kepler Telescope
- ... 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?
- ... that ANTARES, a neutrino telescope under construction in the Mediterranean Sea, will find neutrinos from outer space by looking downward, into the Earth?
- ... that KATRIN is an experiment to determine the mass of the neutrino by measuring the energies of electrons given off from the beta decay of tritium?
- ... that forensic electrical engineering is a branch of forensic engineering whose primary role is to investigate whether a fire was caused by the failure of an electrical appliance?
- Main outlines: Outline of science and Outline of technology.
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Air pollution dispersion terminology • Blogging • Broadcasting • Computing and IT
(Alternative terms for free software • Computer • Fisheries • Fuel cell terms • Internet • Legal terms • Object-oriented programming • Unified Modeling Language) • Firefighting (Equipment • Wildland fires) • Library and information science • Machine vision • Metalworking terminology • Mill machinery • Nautical • Telephony • Textile manufacturing • Transport (Aviation, aerospace, and aeronautics • Automotive design • Rail (Passenger rail (NZ railfan • UK railfan • U.S. railfan) • Woodworking (Joinery) • Winemaking
Technology and applied sciences
- Agronomy • Architecture (Bridges, Portal) • Artificial intelligence • Biotechnology • Electronics • Energy • Engineering • Hazardous Materials • Home improvement • Nanotechnology • Nuclear technology • Robotics
- Transport
- Aviation • Cars (Australian, Japanese) • Cycling • London transport • Nautical • Roads (U.S. Roads) • Spaceflight (Space tourism) • Trains (Rapid transit, UK Railways, UK Trams) • UK Waterways
Science: History of science Philosophy of science Scientific method Systems science Mathematics Biology Chemistry Physics Earth sciences Technology and applied sciences
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- Technology: Computer · Cryptography · Electronics · Engineer · Optics · Robotics · Telecommunications · Wireless
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