An Introduction to Search Engines and Web Navigation by Mark Levene

By Mark Levene

This publication is a moment variation, up to date and elevated to explain the applied sciences that support us locate info at the web.  se's and internet navigation instruments became ubiquitous in our each day use of the net as a knowledge resource, a device for advertisement transactions and a social computing instrument. additionally, throughout the cellular net we've got entry to the web's prone after we are at the move.  This publication demystifies the instruments that we use while interacting with the internet, and offers the reader a close assessment of the place we're and the place we're moving into phrases of seek engine and net navigation applied sciences.

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Users also vary in their level of expertise, interests, information-seeking tasks, the language(s) they understand, and in many other ways. Users also tend to submit short queries (between two to three keywords), avoid the use of anything but the basic search engine syntax, and when the results list is returned, most users do not look at more than the top 10 results, and are unlikely to modify their query. This is all contrary to typical usage of traditional IR. The hypertextual nature of the Web is also different from traditional document collections, in giving users the ability to surf by following links.

The hypertextual nature of the Web is also different from traditional document collections, in giving users the ability to surf by following links. On the positive side (for the Web), there are many roads (or paths of links) that “lead to Rome” and you need only find one of them, but often, as we will discuss later, users lose their way in the myriad of choices they have to make. Another positive aspect of the Web is that it has provided and is providing impetus for the development of many new tools, whose aim is to improve the user’s experience.

However good the search engine tool may be, if its coverage is poor, it will miss relevant web pages in its results set. 14 As we will see below, the Web has grown since 2004, and our current estimate of the accessible web as of 2010 stands at about 600 billion pages. This estimate may still be conservative, as each search engine covers only a certain fraction of the totality of accessible web pages [406], but it gives us a good idea of the scale of the enterprise. The exact number is evasive but our current estimate of 600 billion accessible web pages, approaching 1 trillion, is probably 9 Google press release, Google achieves search milestone with immediate access to more than 6 billion items.

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