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Saturday, November 26, 2005

The PageRank Mechanism Revealed & The Birth Of Google.

The Page Rank model(the closest parallel that I can think of in terms of reach and power is the Coke’s original formula) is indeed a very powerful framework – the benefit of which is felt by all in the web world but little understood. Earlier I covered John Battelle writing about the 1996 Sergey and Page's crawler configured from stanford homepage working outward. Inspired by citation analysis, Page realized that a raw count of links to a page would be a useful guide to that page's rank. He also saw that each link needed its own ranking, based on the link count of its originating page. But such an approach creates a difficult and recursive mathematical challenge - you not only have to count a particular page's links, you also have to count the links attached to the links. Together, Page and Brin created a ranking system that rewarded links that came from sources that were important and penalized those that did not. Page and Brin's breakthrough was to create an algorithm - dubbed PageRank after Page - that manages to take into account both the number of links into a particular site and the number of links into each of the linking sites.
I digged and stumbled upon the original Stanford presentation authored by Larry Page, a piece of history that Stanford is clearly proud of that includes the basis of the Google PageRank algorithm. This is a fascinating read for anyone who has ever been interested in Search Engines & Optimization. The slide show in simple terms explain valuable information about how page rank is determined (do not miss the notion that a link transfers page rank depending on how many links are outgoing from the original page). Also note the simplicity with which it is explained – this has become a google trait for years to come. In practical terms, the relationships governing pagerank are best captured here@ prweaverblog. Some may find the pigeonrank mechanism interesting but am sure that all those interested would find the detailed paper on Pagerank computation - the authentic one, lot more interesting and for some inspiring - how small ideas & brilliant execution can help grow business worth several hundred billion doallr marketcap or own private aircraft .

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Sadagopan's Weblog on Emerging Technologies, Trends,Thoughts, Ideas & Cyberworld
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