2015년 1월 31일 토요일

How does your smartphone know where you are?

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TED-Ed Original Lessons
Why Shakespeare loved iambic pentameter - David T. Freeman and Gregory Taylor
Animation by Brad Purnell
Shakespeare sometimes gets a bad rap in high schools for his complex plots and antiquated language. But a quick peek into the rhythm of his words reveals a poet deeply rooted in the way people spoke in his time — and still speak today. Why do Shakespeare’s words have such staying power? David T. Freeman and Gregory Taylor uncover the power of iambic pentameter.
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How does your smartphone know your location? - Wilton L. Virgo
Animation by Nick Hilditch
GPS location apps on a smartphone can be very handy when mapping a travel route or finding nearby events. But how does your smartphone know where you are? Wilton L. Virgo explains how the answer lies 12,000 miles over your head, in an orbiting satellite that keeps time to the beat of an atomic clock powered by quantum mechanics.
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Why do buildings fall in earthquakes? - Vicki V. May
Animation by Pew36 Animation Studios
Earthquakes have always been a terrifying phenomenon, and they’ve become more deadly as our cities have grown — with collapsing buildings posing one of the largest risks. But why do buildings collapse in an earthquake? And how can it be prevented? Vicki V. May explains the physics of why it is not the sturdiest buildings, but the smartest, that will remain standing.
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