语言教学 | 普渡大学写作教学系列Research&Citation10-Searching Online(3)

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7、Resources to Search the Invisible Web

The invisible web includes many types of online resources that normally cannot be found using regular search engines. The listings below can help you access these resources:

• Alexa: A website that archives older websites that are no longer available on the Internet. For example, Alexa has about 87 million websites from the 2000 election that are for the most part no longer available on the Internet.

• Complete Planet: Provides an extensive listing of databases that cannot be searched by conventional search engine technology. It provides access to lists of databases which you can then search individually.

• The Directory of Open Access Journals: Another full-text journal searchable database.

• FindArticles: Indexes over 10 million articles from a variety of different publications.

• Find Law: A comprehensive site that provides information on legal issues organized by category.

• HighWire: Brought to you by Stanford University, HighWire press provides access to one of the largest databases of free, full-text, scholarly content.

• Infomine: A research database created by librarians for use at the university level. It includes both a browsable catalogue and searching capabilities.

• MagPortal: A search engine that will allow you to search for free online magazine articles on a wide range of topics.

8、Other Useful Sites for Finding Information

Other useful places to begin to search include:

• Librarians' Internet Index: Provides librarian-reviewed websites and material on a host of different topics. While this site is not exhaustive, it will provide you quality information on a large variety of topics. Some of this material is invisible-web material.

• About.com: Provides practical information on a large variety of topics written by trained professionals.

• Wikipedia: The largest free and open access encyclopedia on the internet.

• Refdesk: A site that provides reviews and a search feature for free reference materials online.

9、Other Strategies for Web Searching

Don't limit your Internet searching to using search engines. Be creative and think about which Internet sites might have the information you are looking for. For example, might any of the following lead you to the sites that will provide the information you are looking for?

Looking for information about job opportunities? Look at some of the sites listing job vacancies. Try university websites that sometimes list jobs through their placement offices, or try professional organizations which also sometimes list jobs in that field. Or look through the websites of various large companies because they usually have a section on job opportunities in their company.

Looking for information likely to be discussed on newsgroups or chat rooms? Look through the lists of newsgroups or use a search engine.

Looking for information about a current topic? Check the newspaper and current newsmagazine sites. Most have a search engine for articles in their publications.

Looking for data that might have been collected on a government site? Start with sites such as the Library of Congress or The White House. If the data concerns a state or a foreign country, is there a site for that political entity?

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