Explains federated searching across government science databases often described as the deep web.
An arXiv paper on discovering skylines over hidden web databases whose search interfaces enforce a top-k output constraint. It examines how search interface controls affect discovery cost and develops algorithms for one-ended range, free range and point predicates, combined for mixed interfaces. Experiments over real-world online and offline databases are reported.
This arXiv paper by Dirk Lewandowski and Philipp Mayr provides a critical review of Bergman's 2001 study on the Deep Web. It introduces the concept of the Academic Invisible Web, defined as databases and collections relevant to academia but not searchable by general-purpose internet search engines, and reviews approaches for indexing it. The authors question Bergman's size estimate and suggest collaboration.
An arXiv paper on digging deeper into hidden web databases limited by the top-k output constraint. It presents the GetNext meta-algorithm, which retrieves the next ranked tuple through a restrictive interface without prior knowledge of the ranking function, and algorithms that generate and execute multiple reformulated queries. Theoretical analysis and experiments over synthetic and real-world databases are reported.
A library support page explaining the invisible web, also called the deep web or hidden web. It states that search engines cover about 16% of the internet and advises against relying on them alone, especially for academic information. It lists content search engines cannot find, such as dynamically changing content, password protected resources and sites requiring registration, and suggests web directories and asking a librarian.
A blog from DarkOwl whose analysts publish insights on darknet intelligence, threat detection and cybersecurity trends. Posts include a darknet marketplace snapshot series and articles on breach data and ransomware. The blog states it offers news, research and resources for enterprises and security professionals.
ExoneraTor is a Tor Metrics service that maintains a database of IP addresses that have been part of the Tor network. It answers whether a Tor relay was running on a given IP address on a given date. It may store more than one IP address per relay and records whether a relay permitted transit of Tor traffic to the open Internet at that time.
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An arXiv paper on discovering skylines over hidden web databases whose search interfaces enforce a top-k output constraint. It examines how search interface controls affect discovery cost and develops algorithms for one-ended range, free range and point predicates, combined for mixed interfaces. Experiments over real-world online and offline databases are reported.
This arXiv paper by Dirk Lewandowski and Philipp Mayr provides a critical review of Bergman's 2001 study on the Deep Web. It introduces the concept of the Academic Invisible Web, defined as databases and collections relevant to academia but not searchable by general-purpose internet search engines, and reviews approaches for indexing it. The authors question Bergman's size estimate and suggest collaboration.
An arXiv paper on digging deeper into hidden web databases limited by the top-k output constraint. It presents the GetNext meta-algorithm, which retrieves the next ranked tuple through a restrictive interface without prior knowledge of the ranking function, and algorithms that generate and execute multiple reformulated queries. Theoretical analysis and experiments over synthetic and real-world databases are reported.
A library support page explaining the invisible web, also called the deep web or hidden web. It states that search engines cover about 16% of the internet and advises against relying on them alone, especially for academic information. It lists content search engines cannot find, such as dynamically changing content, password protected resources and sites requiring registration, and suggests web directories and asking a librarian.
A blog from DarkOwl whose analysts publish insights on darknet intelligence, threat detection and cybersecurity trends. Posts include a darknet marketplace snapshot series and articles on breach data and ransomware. The blog states it offers news, research and resources for enterprises and security professionals.
ExoneraTor is a Tor Metrics service that maintains a database of IP addresses that have been part of the Tor network. It answers whether a Tor relay was running on a given IP address on a given date. It may store more than one IP address per relay and records whether a relay permitted transit of Tor traffic to the open Internet at that time.
