Book Reviews
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Tuesday, January 4, 2005
![[Item Permalink]](http://radio.weblogs.com/0112083/images/ur_bullet.gif){kind=small} -- Comment()
They're Not Worthy: "This New Year's Day, a wonderful thing will happen in Europe that won't occur again in the US until 2019: Copyrights on music and television recordings will expire. After a half century of monopoly protection granted artists in exchange for their creative work, the public will get its justly earned free access to an extraordinary range of both famous and forgotten creativity." [via Tomalak's Realm]
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Flood gates open for video blogging: "When Mount Vesuvius erupted and buried Pompeii it was not caught on camera, let alone made almost instantly viewable around the globe. But the tsunami in South Asia, beyond the terrible human cost, may be remembered years from now as a tipping point in human connectivity -- a nexus of communications technology and catastrophic disaster first previewed on 9/11/01 but put on full display in late Dec. 2004 as various amateur footage of the giant destructive waves came flooding in." [Salon.com]
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A tsunami explained and illustrated -- Comment()
The recent tsunami devastated a lot of villages and towns in Indonesia, Thailand, Sri Lanka, India etc. The total number of casualties is estimated at 150,000. This includes about 200 Finnish casualties. The mechanism causing a tsunami is explained in water waves: "A tsunami can have a wavelength in excess of 100 km and period on the order of one hour. Because it has such a long wavelength, a tsunami is a shallow-water wave. Shallow-water waves move with a speed equal to the square root of the product of the acceleration of gravity and the water depth." According to the explanation, at water depth of 4 kilometers a tsunami travels at the speed of 700 km/h. There is an animated illustration of the tsunami in Chile in 1960, which traveled across the Pacific ocean, over 17,000 kilometers.
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