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Modern web search engines are complex software systems using the technology that has evolved over the years. The largest search engines such as Google and Yahoo! utilize tens or hundreds of thousands of computers to process billions of web pages and return results for thousands of searches per secondFact: date=February 2007. High volume of queries and text processing requires the software to run in highly distributed environment with high degree of redundancyFact: date=February 2007. Modern search engines have the following main components:

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Wikipedia About Search Engine Technology

Modern web search engines are complex software systems using the technology that has evolved over the years. The largest search engines such as Google and Yahoo! utilize tens or hundreds of thousands of computers to process billions of web pages and return results for thousands of searches per secondFact: date=February 2007. High volume of queries and text processing requires the software to run in highly distributed environment with high degree of redundancyFact: date=February 2007. Modern search engines have the following main components:

Crawl

The first step in preparing web pages for search is to find and index them. In the past, search engines started with a small list of URLs as seed list, fetched the content, parsed for the links on those pages, fetched the web pages pointed to by those links which provided new links and the cycle continued until enough pages were foundFact: date=February 2007. Most modern search engines now utilize a continuous crawl method rather than discovery based on a seed listFact: date=November 2007. The continuous crawl method is just an extension of discovery method but there is no seed list because the crawl never stopsFact: date=February 2007. The current list of pages is visited on regular intervals and new pages are found when links are added or deleted from those pagesFact: date=February 2007. Many search engines use sophisticated scheduling algorithms to decide when to revisit a particular page. These algorithms range from constant visit-interval with higher priority for more frequently changing pages to adaptive visit-interval based on several criteria such as frequency of change, popularity and overall quality of site, speed of web server serving the page and resource constraints like amount of hardware and bandwidth of Internet connection. Search engines crawl many more pages than they make available for searching because crawler find lots duplicate content pages on the web and many pages don't have useful content. Duplicate and useless content often represents more than half the pages available for indexing.

Link Map

Pages discovered by crawlers are fed into (often distributed) service that creates a link map of the pages. Link map is a graph structure in which pages are represented as nodes connected by the links among those pages. This data is stored in data structures that allow fast access to the data by certain algorithms which compute the popularity score of pages on the web, essentially based on how many links point to a web page and the quality of those links. One such algorithm, PageRank, proposed by Google founders Larry Page and Sergey Brin, is well known and has attracted a lot of attention. The idea of doing link analysis to compute a popularity rank is older than PageRank and many variants of the same idea are currently in use. These ideas can be categorized in three main categories: rank of individual pages, rank of web sites, and nature of web site content (Jon Kleinberg's HITS algorithm). Search engines often differentiate between internal links and external links, with the assumption that links on a page pointing other pages on the same site are less valuable because they are often created by web site owners to artificially increase the rank of their web sites and pages. Link map data structures typically also store the anchor text embedded in the links because anchor text often provides a very good quality short-summary of a web page's content.

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Page 2 - What Lies Ahead for Local Search Engine Technology?

... content leveraging text analytic technologies extracting concepts and themes of ... Comments On: What Lies Ahead for Local Search Engine Technology? ...www.seochat.com/c/a/Search-Engine-News/What-Lies-Ahead-for-L...

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News about Search Engine Technology

iPhone Search Engine Optimization Expert Gregory Markel To Speak At SMX

Centre Daily TimesFounder/President of Infuse Creative, Gregory Markel, will share his 13 years of search engine marketing expertise while focusing on Apple iPhone Search Engine Marketing Optimization at the 2008 Search Engine Marketing Expo (SMX) East at the Javits Convention Center in New York, NY, October 6, 2008.http://www.centredaily.com/business/technology/story/879231....

iPhone Search Engine Optimization Expert Gregory Markel To Speak At SMX

PRWeb Gregory Markel, Founder/President of Infuse Creative and iPhone search marketing pioneer, will speak on iPhone search engine optimization & marketing for YouTube and Google at the 2008 Search Engine Marketing Expo (SMX) East in New York, NY, Oct. 6, 2008 (PRWeb Oct 2, 2008) Read the full story at http://www.prweb.com/releases/iphone-search/marketing-optimization/prweb1417474.htm http://www.prweb.com/releases/iphone-search/marketing-optimi...

Travel agencies need to improve their search engine ranking: study

eyefortravel.comA study has indicated that Advantage members' websites are failing to rank highly in online searches because they are poorly optimised. An analysis of the websites of 115 Advantage agents found only 12 percent scored well when it came to search engine optimisation.http://www.eyefortravel.com/node/15095

Norway to host Microsoft search engine development centre

EARTHtimes.orgOslo - Microsoft said Tuesday its main development centre for search engine technology was to be based in Norway. Chief executive Steve Ballmer made the announcement after a meeting with Norwegian Prime Minister Jens Stoltenberg. ...http://www.earthtimes.org/articles/show/234780,norway-to-hos...

NeXplore Releases Updated Search Engine

PR Newswire via Yahoo! Finance NeXplore Corporation today announced the release of an updated version of NeXplore Search , the company's innovative Web 2.0 search engine optimized for a superior end-user experience, rich-media display and social network integration.http://biz.yahoo.com/prnews/081001/law111.html?.v=101

News about Search Engine Technology

Ask the next Google?

Mid Day.comWhile Ask has some good plans to wrest market share from Google, ultimately, user preferences and not technology will decide its success. Everybody loves a winner that is, unless you are somebody who is competing with the winner. While most users ... http://www.mid-day.com/lifestyle/2008/oct/081008-google-sear...

Feed for Conjungo

WebitPR2 October 2008: Conjungo has launched the UK’s largest independent technology information resource and search engine. The Web 2.0 site combines a searchable database of 15,000 suppliers, a free library of guides offering independent buying advice ... http://www.webitpr.com/release_detail.asp?ReleaseID=10054

Microsoft to build European search hubs

Financial Times ... of a new search technology centre, part of the software company’s attempt to make inroads into Google ’s European business. The move comes as the company starts to build a post-Yahoo strategy for search, after the $44bn bid for the search engine ... http://www.ft.com/cms/s/0/81c8835c-9061-11dd-8abb-0000779fd1...

Chinese solar company Suntech Power to triple U.S. sales

Seattle Times ... based company is part of a high-tech incubator run by entrepreneur Bill Gross, whose idea to link ads to search-engine ... More Business & Technology headlines... E-mail article Print viewhttp://seattletimes.nwsource.com/html/businesstechnology/200...

Cheat Sheet: The semantic web

Silicon.comFor example, if you put a term into a search engine, it returns the results that match the keywords you put in. The ... So semantic technology helps improve search but what else can it do? It's not just search engines that can use this type of information ... http://networks.silicon.com/webwatch/0,39024667,39293834,00....

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A division of Coroman Systems, Inc., which has developed a self-correcting search algorithm and a presentation of results that combines searching and browsing. Explains the ... http://www.relona.net/

Serpsville - Technology Search Engine

Looking for better results? We only search technology sites. Avoid the crap.http://www.serpsville.com/

Search Engine Marketing Technology (SEM, Pay Per Click, PPC, Paid ...

Search Engine Marketing Technology : SearchRev’s patent-pending technology discovers which targeting combinations provide the best results. Unlike traditional keyword bidding ... http://www.searchrev.com/Search_Engine_Marketing_Technology....

Search engines | Technology | guardian.co.uk

Search engines ... Oct 6 2008: Ask.com is to launch an international TV campaign in a bid to challenge Google.http://www.guardian.co.uk/technology/searchengines

Technology Top 100 Awards - South Africa

Congratulations to Vinny Lingham and his team over at IncuBeta for winning South Africa's Technology Top 100 Award again this ...http://www.searchenginejournal.com/?p=4014
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Answers for Search Engine Technology

Muhammadplease how can I get the information about spider web and robot ?. I would like to build search engine .?MuhammadUse search engine capabilities to find specific info. robotstxt.org66Do you think that search engines are good? Why isnt there more encryption technology on the web?66Any time you put something out there fore people to see/read... people are going to see it. You can't print a book or flyer and then complain about people reading it too much or quoting you on it. ...Bead_JunkieWhat's a good search engine for a website?Bead_JunkieThis is a good question, but it leads me to ask you, to what purpose do you want a search engine on your site? Is it strictly as a visitor enhancement or is it to be used to monetize your site? Ad...WillLook at my wikipedia search engine! and my ebay one!?WillSo what do u want, a medal?WillLook at my search engine!?WillNo offense Will but you keep on showin off ur search engines
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