1974 CE - Donald Johanson discovers the 40% complete Australopithecus afarensis skeleton, nicknamed "Lucy" (after The Beatles song "Lucy in the Sky with Diamonds"), in the Awash Valley of Ethiopia's Afar Depression.
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In the News
US Plans to Arm Iraq's Sunni Tribesmen with AK-47s, RPGs, Mortars
No Easy 'Plan B' for Iran if Nuclear Talks with Major Powers Collapse
Suicide Bomber Kills 45 at Volleyball Match in Afghanistan
China Ready to Cut Rates Again on Fears of Deflation
Multi-National Crew Reaches Space Station
No Easy 'Plan B' for Iran if Nuclear Talks with Major Powers Collapse
Suicide Bomber Kills 45 at Volleyball Match in Afghanistan
China Ready to Cut Rates Again on Fears of Deflation
Multi-National Crew Reaches Space Station
Quote of the Day
"What makes the spectacle of Western bourgeois so repulsive is the waste and squander of resources on needless products of status or display for the sake of consumption". --Daniel Bell
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An analog computer is a form of computer that uses the continuously changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved. In contrast, digital computers represent varying quantities symbolically, as their numerical values change. As an analog computer does not use discrete values, but rather continuous values, processes cannot be reliably repeated with exact equivalence, as they can with Turing machines. Analog computers do not suffer from the quantization noise inherent in digital computers, but are limited instead by analog noise.
Analog computers were widely used in scientific and industrial applications where digital computers of the time lacked sufficient performance. Analog computers can have a very wide range of complexity. Slide rules and nomographs are the simplest, while naval gunfire control computers and large hybrid digital/analog computers were among the most complicated.[1] Systems for process control and protective relays used analog computation to perform control and protective functions.
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