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The concepts of topical and focused crawling were first introduced by Filippo Menczer [20] [21] and by Soumen Chakrabarti et al. [22] The main problem in focused crawling is that in the context of a Web crawler, we would like to be able to predict the similarity of the text of a given page to the query before actually downloading the page.
Distributed web crawling is a distributed computing technique whereby Internet search engines employ many computers to index the Internet via web crawling. Such systems may allow for users to voluntarily offer their own computing and bandwidth resources towards crawling web pages.
In a review of topical crawling algorithms, Menczer et al. [12] show that such simple strategies are very effective for short crawls, while more sophisticated techniques such as reinforcement learning and evolutionary adaptation can give the best performance over longer crawls. It has been shown that spatial information is important to classify ...
Web scraping is the process of automatically mining data or collecting information from the World Wide Web. It is a field with active developments sharing a common goal with the semantic web vision, an ambitious initiative that still requires breakthroughs in text processing, semantic understanding, artificial intelligence and human-computer interactions.
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SeniorNet is a 501(c)(3) charity organization that provides computer skills and internet education to seniors, veterans, the underprivileged, the disabled, and others with physical or economic impairments. Volunteers across the country run SeniorNet Computer Learning Centres, which follow a standardized curriculum created at SeniorNet headquarters.
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CA—Computer Accountancy; CA—Certificate authority; CAD—Computer-Aided Design; CAE—Computer-Aided Engineering; CAID—Computer-Aided Industrial Design; CAI—Computer-Aided Instruction; CAM—Computer-Aided Manufacturing; CAP—Consistency Availability Partition tolerance (theorem)