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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.
Newer projects are attempting to use a less structured, more ad hoc form of collaboration by enlisting volunteers to join the effort using, in many cases, their home or personal computers. LookSmart is the largest search engine to use this technique, which powers its Grub distributed web-crawling project .
Some predicates may be based on simple, deterministic and surface properties. For example, a crawler's mission may be to crawl pages from only the .jp domain. Other predicates may be softer or comparative, e.g., "crawl pages about baseball", or "crawl pages with large PageRank". An important page property pertains to topics, leading to 'topical ...
Crawl date Size in TiB Billions of pages Comments April 2024 386 2.7 Crawl conducted from April 12 to April 24, 2024 February/March 2024 425 3.16 Crawl conducted from February 20 to March 5, 2024 December 2023 454 3.35 Crawl conducted from November 28 to December 12, 2023 June 2023 390 3.1 Crawl conducted from May 27 to June 11, 2023 April 2023 400
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.
Crawling (human), any of several types of human quadrupedal gait Limbless locomotion , the movement of limbless animals over the ground Undulatory locomotion , a type of motion characterized by wave-like movement patterns that act to propel an animal forward
This is a comprehensive list of volunteer computing projects, which are a type of distributed computing where volunteers donate computing time to specific causes. The donated computing power comes from idle CPUs and GPUs in personal computers, video game consoles, [1] and Android devices.
This article is a list of notable unsolved problems in computer science. A problem in computer science is considered unsolved when no solution is known or when experts in the field disagree about proposed solutions.