- #SPECIALIZED SEARCH ENGINES LIMIT THE WEB PAGES THEY SEARCH BY SUBJECT MANUAL#
- #SPECIALIZED SEARCH ENGINES LIMIT THE WEB PAGES THEY SEARCH BY SUBJECT SOFTWARE#
- #SPECIALIZED SEARCH ENGINES LIMIT THE WEB PAGES THEY SEARCH BY SUBJECT SERIES#
Any attempt to visit a site on a blacklist fails. Blacklists change over time, and most companies offer updated lists for free. A blacklist is a list of Web sites that the Web filter's creators have designated as undesirable.
![specialized search engines limit the web pages they search by subject specialized search engines limit the web pages they search by subject](https://neilpatel.com/wp-content/uploads/2012/01/similarweb-search.jpg)
Most Web filters use two main techniques to block content: Blacklists and keyword blocking. For example, CYBERsitter has 35 filter categories, including pornography and social networking sites. These options tell the program which filters to enable.
#SPECIALIZED SEARCH ENGINES LIMIT THE WEB PAGES THEY SEARCH BY SUBJECT SERIES#
These programs usually have a series of options parents can select to limit the sites their children can access. They can purchase Web filtering programs like Net Nanny or CYBERsitter to block access to undesirable Web sites.
#SPECIALIZED SEARCH ENGINES LIMIT THE WEB PAGES THEY SEARCH BY SUBJECT SOFTWARE#
Many parents turn to software and hardware solutions to this problem. While some opponents of censorship may feel that parental supervision is the best way to keep kids safe online, many parents point out that it's difficult - if not impossible - to oversee a child's access to the Internet all the time. Whether it's pornography, hate speech, chat rooms or gambling sites, many parents worry that their children will be exposed to negative or even dangerous content. This is possible because Clarivate Analytics staff have mapped the specialized vocabularies from each of the different classification systems onto a common indexing backbone called Research Areas, which are broadly based on Web of Science Core Collection / Journal Citation Report classifications.Īfter a topic search at the All Databases level, you can refine by Research Areas and focus on content you are interested in without having to know the specialized vocabularies of each indexing system.įor example, a topic search for "heart attack" pulls up more than 16,000 records, and if I refine by "Pathology" under Research Areas, I can go to those documents without having to know the specific MeSH terms those documents were indexed by.There's no denying that the Internet contains a lot of material that most parents wouldn't want their children to see.
![specialized search engines limit the web pages they search by subject specialized search engines limit the web pages they search by subject](http://tokorin.cocolog-nifty.com/.shared/image.html?/photos/uncategorized/2007/10/18/0710191.jpg)
#SPECIALIZED SEARCH ENGINES LIMIT THE WEB PAGES THEY SEARCH BY SUBJECT MANUAL#
Since my institution's entitlement also includes Medline, I can see in the the right sidebar if this paper is also indexed in Medline, and that is, indeed, the case.Ĭlicking on "View medical data (in MEDLINE)" lets me switch to the Medline record for this article and I can now see this paper's MeSH Terms.Ī topic search at the All Databases level also lets you take advantage of the specialized indexing systems of each specific resource (think MeSH Terms in Medline, Taxonomic Data in BIOSIS, Class and Manual codes in Derwent etc.) without having to be an expert in those indexing systems.
![specialized search engines limit the web pages they search by subject specialized search engines limit the web pages they search by subject](https://neilpatel.com/wp-content/uploads/2012/01/duckduckgo-2018.jpg)