"Meta-Search Engines & Deep Web - CC"
The Deep Web & A Quick Review of CCOL James Backer, Ph.D. Cambridge College Searching the Surface Web • Via search engines and meta-search engines • Use of image granted by Brightplanet.com http://www.brightplanet.com/deepcontent/tutorials /DeepWeb/index.asp The Deep Web • Internet resources that most spiders can’t get to: – Non-HTML material – Dynamic HTML – Library Catalogs – Databases – Discussion Groups and News Groups – Telnet – Others Why don’t Search Engines Get To the Deep Web? • “Spiders” only search via hyperlinks, recording info about static HTML pages Deep Web vs. Surface Web • Deep Web is approximately 500 times larger than the Surface Web • Deep Web is estimated to be 3 times better in quality • The Deep Web is growing much faster than the Surface Web • 95% of the Deep Web is free, but users must first pass through the front pages • Currently technology is being developed to systematically search the Deep Web How Can We Search the Deep Web? • Use of image granted by Brightplanet.com http://www.brightplanet.com/deepcontent/tutorials /DeepWeb/index.asp Searching the Deep Web • Manual Searches: – Go to URLs of databases – Join Discussion Lists and use archives – Etc. • This can be very time consuming! • Buy into commercial service – Cambridge College Online Library • In future: Deep Web Search Engines – Brightplanet.com & others Access CCOL via CC’s Home Page: Username & Password • Found on FC desktop: Library Conference • Changes each term • Don’t give this information out to non-CC people! E-Global Library First Time Users: Now for the Data Bases: Each Data Base has unique, but similar structure: Explore! Other Databases in CCOL • Electric Library • CINAHL • ERIC • ERIC E*Subscribe • GPO • PsycARTICLES • MEDLINE • PapersFirst • Wilson Select • ProceedingsFirst Plus • WorldCat • Article First • But, why bother? • Now we know how to use search engines to get WWW pages !!! • Most academic institutions assume that simple Web pages are highly questionable, if not worthless. • Remember, anyone can publish a Web page. CCOL Offers: • Easy access to academic journals • Some of the journals are refereed • Many of them are full text Have a Library Problem? Ask an Online Librarian! Have a Technical Problem? Contact Tech Support! Still Have Problems? • If either the Online Librarian did not respond, or….. • The tech support people did not respond… • Please contact Maida Tilchen, the Project Manager for Library Services at Cambridge College. She is in the First Class e-mail Directory. Sources: • Bergman, M. (2002). The Deep Web: Surfacing Hidden Value. http://www.brightplanet.com/deepcontent/t utorials/DeepWeb/index.asp • Permission requested and received for all non-Cambridge College images.