seminar report on deep web pdf
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Hi am deekshant i would like to get details on seminar report on deep web pdf ..My friend chetan said seminar report on deep web pdf will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc
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Abstract

Searching on the Internet today can be compared to dragging a net across the surface of the ocean. While a great deal may be caught in the net, there is still a wealth of information that is deep, and therefore, missed. The reason is simple: Most of the Web's information on dynamically generated sites, and standard search engines never find it. Traditional search engines create their indices by spidering or crawling surface Web pages. To be discovered, the page must be static and linked to other pages. Traditional search engines can not "see" or retrieve content in the deep Web - those pages do not exist until they are created dynamically as the result of a specific search. Because traditional search engine crawlers can not probe beneath the surface, the deep Web has heretofore been hidden. Deep web is the name given to the technology of surfacing the hidden value that cannot be easily detected by other search engines. The deep web is the content that cannot be indexed and searched by search engines. For this reason the deep web is also called invisible web.

WHAT IS DEEP WEB?

The Deep Web is the content that resides in searchable databases, the results from which can only be discovered by a direct query. Without the directed query, the database does not publish the result. When queried, Deep Web sites post their results as dynamic Web pages in real-time. Though these dynamic pages have a unique URL address that allows them to be retrieved again later, they are not persistent. The invisible web consists of files, images and web sites that, for a variety of reasons, cannot be indexed by popular search engines. The deep web is qualitatively different from the surface web. Deep web sources store their content in searchable databases that only produce results dynamically in response to a direct request. But a direct query is a "one at a time" laborious way to search. Deep web's search technology automates the process of making dozens of direct queries simultaneously using multiple-thread technology.

The Deep Web is made up of hundreds of thousands of publicly accessible databases and is approximately 500 times bigger than the surface Web.

IMPORTANCE OF DEEP WEB

" Public information on the deep Web is currently 400 to 550 times larger than the commonly defined World Wide Web.

" The deep Web contains 7,500 terabytes of information compared to nineteen terabytes of information in the surface Web.

" The deep Web contains nearly 550 billion individual documents compared to the one billion of the surface Web.

" More than 200,000 deep Web sites presently exist.

" Sixty of the largest deep-Web sites collectively contain about 750 terabytes of information -- sufficient by themselves to exceed the size of the surface Web forty times.

" On average, deep Web sites receive fifty per cent greater monthly traffic than surface sites and are more highly linked to than surface sites; however, the typical (median) deep Web site is not well known to the Internet-searching public.

" The deep Web is the largest growing category of new information on the Internet.

" Deep Web sites tend to be narrower, with deeper content, than conventional surface sites.

" Total quality content of the deep Web is 1,000 to 2,000 times greater than that of the surface Web
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