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1. What is cache coherence and parallelism?

3. How is the SETI Research Project making use of parallel processing?

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1. What is cache coherence and parallelism?
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See [1], [2]. Also in attached document.

3. How is the SETI Research Project making use of parallel processing?
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In a large enterprise [3], hundreds or thousands of desktop machines sit idle at any given moment. Even when a user is at the computer reading the screen and not typing or clicking, it constitutes idle time. These unused cycles can be put to use on large computational problems. Likewise, the millions of users on the Internet create a massive amount of wasted machine cycles that can be harnessed instead. This is precisely what the Search for Extraterrestrial Intelligence program does with Internet users all over the world.

SETI
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(Search for ExtraTerrestrial Intelligence) A huge grid computing project on the Internet that takes advantage of unused processing time in users' computers to analyze radio telescope data. The purpose of SETI@home, which is administered by the University of California at Berkeley, is to pick up communications from other planets.

The non-profit SETI@home project is one of the most widely-known scientific ...

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