The Innovation Of Deep Web Crawlers Essay

One of the most revolutionary invention is the Internet, and throughout the years it has evolved. People throughout the world use the Internet to access their mail, shopping, communication, and social media. Therefore, Some infrastructure components that are important for providing the surface web to the public are providing people to find and access what they want. Moreover, the surface web enables people to access everyday Internet use such as Facebook, Twitter, and other Social Media platforms. Surface Web is a “portion of the World Wide Web that is readily available to the general public and searchable with standard web search engines” It is mind-blowing on how big the web is and it is hard to believe that the searched contents are limited. JJ Rosen stated that “Google has placed in its index an estimated 35 trillion Web pages across the Internet worldwide. While this is an amazing statistic, believe it or not, 35 trillion is barely the tip of the iceberg. Google's index represents only an estimated 4 percent of the information that exists on the Internet”. Therefore, ninety six percent of contents are not commercialized by Google or Bing's known as Deep Web and are harder to access than Surface Web. Software servers are able to identify billions of pages, but search engine like Bing or Google that the ability to optimize the pages that are relevant to what is being searched. Furthermore, the Deep web is not indexable by search engines and as stated in the book that “

The Deep Web holds countless sensitive databases, medical and legal information, government reports, sensitive papers, publications, password-protected data, and private

Crawler must avoid the overloading of Web sites or network links while doing its task. Unless it has unlimited computing resources and unlimited time, it must carefully decide what URLs to scan and in what order as it deals with huge volumes of data .Crawler must decide how frequently to revisit pages it has already seen, in order to keep its client informed of changes on the

in this process was the writing of the text by a scribe. Scribes trained for many years to

In this modern age of computers, disposable pens, and mechanical pencils, it is easy to forget that at one time writing was not so simple or convenient. Most of us have ". . . become so used to composing virtual prose at a keyboard . . . (Baron 36)," that the thought of writing anything out by hand with a pencil, or any other implement, would not even cross our minds. The experience of trying to invent my own writing implements has given

Once language begins to develop, though, humans wrote on anything that would stand still long enough. Clay tablets, bamboo, papyrus and stone were only a few of the early writing surfaces. Things changed once the Chinese, specifically a man named Cai Lun, invented the prototype for modern paper. Before Cai’s breakthrough, the Chinese wrote on thin strips of bamboo and lengths of silk, but in AD 105, he created a mixture of wood fibers and water and pressed it onto a woven cloth. The weave in the cloth allowed the moisture in the pulpy mixture to seep out, resulting in rough paper. (Josh Clark)

The search engine industry is commonly known to have started in 1990 with the release of Archie, a tool used to search the (pre-web) Internet, allowing people to find specific files (Buganza, T., Valle, E.D. Search Computing. In The search engine Industry. Edited by Ceri. S & Brambilla. M.). As the evolution of search engines continued, the development of the most popular search engines today came about; Yahoo, Google, MSN and Bing. According to a recent study; Google remains the most used search engine in the world with an average of 114.7 billion searches and a 65.2% market share Sullivan, D. (11 February 2013). Google Still World’s Most Popular Search Engine By Far, But Share Of Unique Searchers Dips Slightly. Available from: http://searchengineland.com/google-worlds-most-popular-search-engine-148089 (Accessed12 April 2013).

Crawling research had been geared toward collecting websites, blogs, and web forums. There has been considerable research on a collection of standard websites and pages relating to a particular topic, often for the portal building.

Just when we already feel overwhelmed by the number of results returned when using search engines, such as Google, Bing, there is mounting evidence that there is a great deal that is not being searched – namely the Deep Web. Standard search engines are not indexing most of the information on the Web. Not only the Deep Web is a majority of Web content submerged within these sites, but it is also some of the best information on the Internet. Deep Web is a term used for World Wide Web content that is not part of the Surface Web (which is indexed by standard search engines). A recent publication have explored what the Deep Web is and the implications of it for users as Web searchers. According to Bergman’s article from the Journal of Electronic Publishing, the Deep Web is 400-550 times larger than the Surface Web. Since the Deep Web contents are not static and linked to any other pages, search engines cannot “see” or retrieve contents from the Deep Web, therefore, it becomes hidden. In order to access the Deep Web contents, users have to connect through a proxy service called Tor (short for “The Onion Router”). All activities through Tor are encrypted through multiple nodes in the network so that users’ information are difficult to trace, protecting their privacy. Since all contents on the Deep Web are covered by anonymity, a condition that make it attractive for the cybercrime industry that is moving its business in the region of cyberspace where it is really difficult to trace

Even though, most people search the internet daily; a large amount of data is missing in their queries. The popular search engines rely on the hyperlinks and metatags embedded in the web pages to find and identify content. (Pcmag.com, 2015 2) Due to this formatting, a significant amount of information is absent from their requests; this missing information makes up the deep web.

The Internet is a vast resource of data of different sorts: text, pictures, sound and video. With the continuous growth and abundance of data available on the Internet, the World Wide Web has become a huge repository of information. Web mining is the application of data mining to large web data repositories. Web Mining is the use of information mining techniques to automatically discover and extract information from web documents and

China is known for its beauty and intellectual prestige but the one thing that mostly stands out when speaking of Chinese art is the form of calligraphy. It is known to be one of the earliest forms of writing that can be translated, which began thousands of years ago and is still used today. Chinese calligraphy was invented and developed by the ancient Chinese who used the innovation as a method of written communication. Throughout the years, the Chinese calligraphy would evolve as the characters continue to change and later expand greater than the previous generations. To obtain a better understanding of Chinese calligraphy, it is imperative to understand the history of Chinese writing and how

A crawler is a program that retrieves Web pages, commonly for use by a search engine or a Web cache. The World Wide Web commonly known as "WWW ', "Web" or "W3", is a system of Search engine help users to find the documents of their interest with the help of its components called crawler. The basic task of a crawler is to fetch pages, parse them to get more URLs, and then fetch these URLs to get even more URLs. It is basically a program that retrieves and stores pages in a repository. interlinked hypertext documents accessed via the Internet.

Web mining is the application of data mining technique which is an unstructured or semi-structured data and it automatically discovers and extracts potentially useful and previously unknown information or knowledge from the web. The significant web mining applications are website design, web search, search engines, information retrieval, network management, E-commerce, business and artificial intelligence, web market places and web communities. Online business breaks the barrier of time and space as compared to the physical office business. Big companies around the world are realizing that e-commerce is not just buying and selling over Internet, rather it improves the efficiency to compete with other giants in the market. This application includes the temporal issues for the users. []

The wide adoption of the Internet has fundamentally altered the ways in which user communicate, gather information, conduct businesses and make purchases. As the use of World Wide Web is increasing, data on internet is increasing. A few sites consist of millions of pages, but millions of sites only contain a handful of pages. Few sites contain millions of links, but many sites have one or two. Millions of users flock to a few select sites, giving little attention to millions of others. The expansion of the World Wide Web (Web for short) has resulted in a large amount of data that is now in general freely available for user access. The different types of data have to be managed and organized in such a way that they can be accessed by different users efficiently by the search engine.