Author: administración

Inside a six-walled wedge-foam chamber on Microsoft’s Redmond campus, the background sound is so far below human hearing that visitors start to perceive the grinding of their own joints, the rush of blood in their ears, and eventually a faint ringing that turns out to be the firing of their own nerves.

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Building 87 on Microsoft’s Redmond campus contains a room that registers a background sound level of negative 20.35 decibels, a measurement so far below the threshold of human hearing that the air molecules themselves are barely loud enough to be detected. The chamber holds the Guinness World Record for the quietest place on Earth, and according to its principal designer Hundraj Gopal, no one has managed to sit inside it in total darkness for longer than about 45 minutes. The threshold of human hearing sits at 0 decibels. Negative 20 is significantly quieter than that. Inside the room, the brain…

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College Pricing Black Box: How Colleges Inflate the Cost of a Degree

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Key PointsThe published “sticker price” of a college rarely matches what a family pays, and the gap is shaped by financial aid, mandatory fees, and rules that can stretch a four-year degree into five or six.Federal watchdogs and the courts have documented many of these practices, including a GAO review of aid letters, a CFPB finding on transcript holds, and an antitrust case against 17 elite universities.Families can protect themselves by focusing on net price rather than sticker price, scrutinizing award letters, and planning around credit transfer and graduation timelines. The price a college advertises and the price a family…

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In 1942, Hollywood actress Hedy Lamarr and avant-garde composer George Antheil received US Patent 2,292,387 for a frequency-hopping radio system synchronised by a perforated paper roll borrowed from a player piano, a technique the Navy filed away as unworkable and which now underpins every Wi-Fi router, Bluetooth earbud, and GPS receiver on Earth.

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On August 11, 1942, the US Patent Office issued Patent No. 2,292,387 to Hedy Kiesler Markey, the legal name of MGM star Hedy Lamarr, and her co-inventor George Antheil, a composer best known for a 1920s ballet scored for multiple synchronised player pianos, airplane propellers, and a siren. The patent described a “secret communication system” for keeping a radio signal from being jammed or intercepted by switching it rapidly among many carrier frequencies, hopping between them in a pattern set by a perforated paper roll identical to the ones that drove player pianos. The idea was to guide a radio-controlled…

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